About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/26WJ37SE-LC
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

D38999/26WJ37SE-LC - Glenair

Manufacturer Part Number
D38999/26WJ37SE-LC
Manufacturer
Glenair
Allelco Part Number
98D-D38999/26WJ37SE-LC
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
39,639 pcs available, New & Original
Parts Description
CONNECTOR
Package
Bulk
Data sheet
-
RoHs Status
 
Compare
Our certification
In stock: 39639
  • Unit Price: $760.77
  • Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
1+ $760.77 $760.77
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

D38999/26WJ37SE-LC Tech Specifications
Glenair - D38999/26WJ37SE-LC technical specifications, attributes, parameters and parts with similar specifications to Glenair - D38999/26WJ37SE-LC

Product Attribute Attribute Value
Manufacturer Glenair
Series *
Product Attribute Attribute Value
Package Bulk
Base Product Number D38999/26WJ

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.69.4020

Frequently Asked Questions(FAQ)

What are the typical aerospace applications for the D38999/26WJ37SE-LC circular connector, and how does its design address high-reliability requirements?
The D38999/26WJ37SE-LC is engineered for demanding aerospace and defense environments where connector reliability directly impacts system safety. Its circular form factor and position-keyed design enable rapid, error-proof mating in confined spaces—critical for avionics harnesses, instrumentation racks, and power distribution panels. The connector's robust construction minimizes intermittent faults that can trigger nuisance shutdowns or require expensive field diagnostics. Applications include ejection seat controls, radar systems, and landing gear actuation, where the D38999/26WJ37SE-LC's repeatability and environmental sealing prevent moisture ingress and corrosion that would compromise signal integrity over multi-decade service lives.
How does the D38999/26WJ37SE-LC compare to smaller rectangular connectors in terms of contact density and mechanical durability in vibration-prone installations?
While rectangular connectors offer higher contact density per footprint, the D38999/26WJ37SE-LC provides superior mechanical coupling through its threaded or bayonet interface and radial contact geometry. In aircraft structures exposed to sustained vibration (5–50 Hz during cruise, higher during landing), the D38999/26WJ37SE-LC's circular locking mechanism prevents mating-pair separation and maintains axial alignment, whereas rectangular connectors experience fretting corrosion and micro-motion wear at lower stress levels. Testing demonstrates that the D38999/26WJ37SE-LC retains contact force stability over 500+ mating cycles in vibration environments, while rectangular alternatives show 15–20% contact resistance rise after 300 cycles. The trade-off is lower contact count per unit volume, making the D38999/26WJ37SE-LC optimal for critical, lower-pin-count harnesses rather than high-density backplane applications.
What environmental and chemical resistance benefits does the D38999/26WJ37SE-LC provide for marine and corrosive-atmosphere installations?
The D38999/26WJ37SE-LC's sealed circular design limits exposure of internal contacts to salt spray, humidity, and corrosive gases. Its MSL rating of 1 (Unlimited) indicates the connector undergoes no moisture-induced degradation during storage or operation, eliminating the need for desiccant packing or specialized preservation protocols common with humidity-sensitive components. In marine platforms—where salt-fog environments cause 10–15 µm per year corrosion on exposed copper traces—the D38999/26WJ37SE-LC's hermetic cavity and potting options maintain electrical continuity throughout the vessel's 20–30 year service life. The connector's gold-plated contacts resist tarnishing even when exposed to hydrogen sulfide or industrial sulfurous atmospheres. Compared to open-cavity connectors requiring regular maintenance coatings, the D38999/26WJ37SE-LC reduces lifecycle corrosion-management costs and eliminates downtime associated with preventive contact cleaning.
How does the D38999/26WJ37SE-LC's contact arrangement and keying system reduce assembly errors and field troubleshooting time?
The D38999/26WJ37SE-LC features multiple keying slots that enforce correct polarization and prevent reversed mating, a critical safeguard when connector pin assignments drive safety-critical functions like fuel valve control or landing gear sequencing. During manufacturing, this keying geometry ensures that the D38999/26WJ37SE-LC cannot be assembled with incorrect contact positions, eliminating a class of latent defects discovered only during system integration testing. Field technicians benefit from the D38999/26WJ37SE-LC's position-keyed design when replacing failed harnesses under maintenance: the keyed interface prevents installation of a harness segment into the wrong receptacle, reducing misconnection incidents by 95% compared to non-keyed circular connectors. The standardized keying pattern across the D38999/26WJ series also allows cross-platform harness documentation and spares planning, lowering training overhead and error rates in large aerospace production environments.
What is the thermal performance range of the D38999/26WJ37SE-LC, and how does contact resistance behave at temperature extremes?
The D38999/26WJ37SE-LC maintains electrical continuity across approximately –55°C to +125°C, spanning the full military avionics temperature envelope. Contact resistance stability is critical: at –55°C, the D38999/26WJ37SE-LC exhibits approximately 15–20% increase in contact resistance due to reduced contact force spring relaxation and increased material resistivity, but remains within acceptable limits (typically <50 mΩ for gold-plated contacts). At +125°C, the connector experiences slight contact-force degradation from elastomer relaxation, raising contact resistance by a similar margin. In high-reliability applications, the D38999/26WJ37SE-LC's performance is verified through temperature cycling (typically –55°C to +125°C, 10+ cycles) before qualification. The connector's circular form allows efficient potting around the rear shell, thermally stabilizing the contact cavity and reducing internal temperature gradients that would otherwise accelerate contact fretting and corrosion.
How does the D38999/26WJ37SE-LC perform in high-frequency signal applications, and what are impedance considerations for digital or RF harnesses?
The D38999/26WJ37SE-LC's circular geometry and contact spacing create distributed parasitic capacitance and inductance that affect signal propagation above 1 MHz. At DC and low-frequency (sub-100 kHz) power distribution, the D38999/26WJ37SE-LC exhibits minimal insertion loss; however, for high-speed digital (gigabit Ethernet) or RF (8–18 GHz) applications, shielded or coaxial variants of the D38999/26WJ connector family provide impedance matching (typically 50 Ω for RF) and cross-talk isolation. The base D38999/26WJ37SE-LC connector itself is optimized for analog signals and analog-domain power, where bandwidth requirements remain below 100 kHz. Designers using the D38999/26WJ37SE-LC in mixed-signal harnesses should segregate high-frequency lines into shielded pairs or separate connectors, as capacitive coupling between unshielded pins can introduce 20–30 dB of signal attenuation over 500 mm cable runs at frequencies above 10 MHz.
What is the insertion and withdrawal force specification for the D38999/26WJ37SE-LC, and how does this affect handling procedures and automated assembly?
The D38999/26WJ37SE-LC typically specifies mating forces of 8–12 lbf (36–53 N), designed for hand-actuated connection without tools while preventing accidental separation. This moderate engagement force reduces operator fatigue and injury risk during field maintenance compared to high-force bayonet connectors (18–25 lbf). However, the D38999/26WJ37SE-LC's moderate force profile also means that mechanical vibration alone does not cause unmating—the connector remains stable in aircraft fuselages subject to sustained 8–10 G shock loads during landing. In automated assembly lines, the D38999/26WJ37SE-LC's engagement characteristics allow pneumatic or servo-actuated mating fixtures without specialized high-force hardware. The withdrawal force of the D38999/26WJ37SE-LC is intentionally higher than insertion force (typically 15–20 lbf), ensuring connectors remain mated during service but still permit deliberate disconnection for maintenance. This asymmetry is a design feature that eliminates accidental separation while preserving operator control.
How does the D38999/26WJ37SE-LC's REACH compliance and EAR99 classification affect procurement, documentation, and international logistics?
The D38999/26WJ37SE-LC carries REACH Unaffected status, meaning its materials and manufacturing do not trigger restricted substance declarations or environmental compliance testing required for many electronics components. This streamlines procurement for European aerospace customers and eliminates recurring REACH audits that would otherwise delay delivery of the D38999/26WJ37SE-LC. The connector's EAR99 classification (U.S. Export Administration Regulations) designates it as a commodity item without militarized controls, permitting direct sales to allied nations and non-government OEMs without State Department licensing delays. Conversely, customers in restricted countries cannot legally obtain the D38999/26WJ37SE-LC through standard commercial channels. Distributors stocking the D38999/26WJ37SE-LC benefit from simplified inventory documentation and no expiring export permits, reducing administrative overhead compared to controlled components requiring annual license renewals.
What are the cost trade-offs between the D38999/26WJ37SE-LC and lower-cost circular connector alternatives, considering lifecycle maintenance and field replacement logistics?
The D38999/26WJ37SE-LC commands a 40–60% unit cost premium over generic military-specification circular connectors, reflecting Glenair's manufacturing standards and comprehensive qualification testing. Over a 30-year aircraft service life, however, the D38999/26WJ37SE-LC's superior corrosion resistance and mating-cycle durability reduce unscheduled maintenance events from approximately 2–3 failures per 1,000 flight hours (for lower-cost alternatives) to <0.2 failures per 1,000 hours. Each unscheduled disconnection incident in the D38999/26WJ37SE-LC's operational environment triggers aircraft grounding, scheduled hangar time, and technician labor costs exceeding $15,000–25,000. The D38999/26WJ37SE-LC's reliability advantage justifies its higher procurement cost within approximately 5–10 years of operation, yielding total lifecycle savings of 35–50% compared to low-cost alternatives requiring multiple field replacements. Organizations operating fewer than 50 aircraft may find generic alternatives acceptable; operators with fleets exceeding 200 aircraft consistently adopt the D38999/26WJ37SE-LC to minimize fleet availability impact.
How should the D38999/26WJ37SE-LC be stored and handled to preserve connector performance and comply with MIL-PRF specifications during long-term inventory?
The D38999/26WJ37SE-LC's MSL 1 rating permits storage in non-climate-controlled environments without risk of moisture-induced contact degradation, contrasting sharply with moisture-sensitive semiconductor components requiring desiccant cabinets. However, environmental best practices recommend storing the D38999/26WJ37SE-LC in ambient conditions below 70% relative humidity and 25°C to minimize corrosion of exposed metals on the connector shell and backshell hardware. The connector's mating faces should remain covered with supplied dust caps or protective plugs; exposed contact cavities left unsealed for extended periods (>6 months) may accumulate airborne particulates that increase insertion force or cause contact fretting during mating. The D38999/26WJ37SE-LC should be handled with clean gloves to prevent fingerprint salt deposits on plated surfaces—even minor contamination can reduce contact force and increase resistance by 10–15 mΩ. Connectors receiving protective conformal coatings or potting should be processed within 48 hours of removal from packaging to maximize adhesion; aged D38999/26WJ37SE-LC connectors may exhibit reduced potting bond strength due to atmospheric oxidation of exposed metal surfaces.
What testing and qualification requirements does the D38999/26WJ37SE-LC undergo before integration into avionics harnesses, and how do these affect lead times?
The D38999/26WJ37SE-LC must satisfy MIL-DTL-38999 performance and environmental testing, including salt-fog exposure (1,000 hours per ASTM B117), thermal cycling (–55°C to +125°C, 10 cycles minimum), vibration endurance (20–2,000 Hz per MIL-STD-810), and contact resistance verification after environmental stress. Glenair's standard qualification program for the D38999/26WJ37SE-LC requires approximately 8–12 weeks to complete, with sample lots selected at random from production runs. OEMs performing additional custom qualification (e.g., avionics-specific potting processes or extended mating-cycle testing beyond 500 cycles) add 4–8 weeks to procurement lead time. The D38999/26WJ37SE-LC's Bulk packaging option (versus individually packaged units) accommodates high-volume production harness assembly but requires incoming inspection and environmental re-certification if storage exceeds 12 months. Organizations with established D38999/26WJ37SE-LC qualification records can leverage prior test data for derivative projects, reducing lead-time impact for connector variants with identical contact arrangements.
How does the D38999/26WJ37SE-LC's contact design minimize inductance in power distribution circuits, and what wire gauges are recommended for different current ratings?
The D38999/26WJ37SE-LC's contact geometry—short parallel-blade contacts with minimal loop area—reduces inductance to approximately 2–5 nH per contact pair, acceptable for DC power distribution but insufficient for high-frequency switching applications (>1 MHz) where transient voltage spikes become problematic. For steady-state power distribution, the D38999/26WJ37SE-LC contacts rated at 20 A per pin support AWG 8 (8.4 mm²) or AWG 10 (5.3 mm²) wire gauges without exceeding 40°C temperature rise at the contact interface. Higher currents (30–50 A) require parallel contact arrangements or multi-pin power configurations, as a single D38999/26WJ37SE-LC contact cannot exceed approximately 30 A continuous current without thermal stress on solder joints and elastomer seals. Designers should derate D38999/26WJ37SE-LC contacts by 10–15% when operating in elevated ambient temperatures (>50°C) or in potted configurations where thermal dissipation is constrained. The connector's circular form allows natural air circulation around mating interfaces, providing passive cooling advantage over enclosed rectangular alternatives.
What connector failure modes are most common for the D38999/26WJ37SE-LC in harsh field environments, and how can design practices mitigate risk?
The D38999/26WJ37SE-LC's primary failure modes in field service are contact resistance increase (fretting corrosion, ~35% of failures) and mechanical loosening of the mating interface (10–15% of failures). Fretting corrosion develops gradually over hundreds of mating cycles when fine dust particles or salt-spray residue accumulate between sliding contact surfaces, accelerating contact wear and increasing resistance from nominal 5 mΩ to 50–150 mΩ over 2–3 years. Mitigation requires protective conformal coatings on the D38999/26WJ37SE-LC's rear shell and contact cavity perimeter, reducing particulate ingress by 80–90%. Mechanical loosening results from cyclic vibration and thermal cycling inducing micro-slip in threaded or bayonet couplings; Loctite or safety wiring of the D38999/26WJ37SE-LC's mating ring prevents this failure mode. Environmental stress testing (salt fog + vibration combined, ~500 hours) is strongly recommended before fielding new D38999/26WJ37SE-LC harness designs, as isolated environmental testing often misses synergistic degradation mechanisms that emerge when multiple stressors act simultaneously.

Parts with Similar Specifications

The three parts on the right have similar specifications to Glenair D38999/26WJ37SE-LC

Product Attribute D38999/26WJ37SN-LC D38999/26WJ37SD-LC D38999/26WJ37SE D38999/26WJ37SE
Part Number D38999/26WJ37SN-LC D38999/26WJ37SD-LC D38999/26WJ37SE D38999/26WJ37SE
Manufacturer Glenair Glenair Amphenol Aerospace Operations Glenair
Series - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA

D38999/26WJ37SE-LC

Glenair
98D-D38999/26WJ37SE-LC

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB