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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/26WJ37SE
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D38999/26WJ37SE - Glenair

Manufacturer Part Number
D38999/26WJ37SE
Manufacturer
Glenair
Allelco Part Number
98D-D38999/26WJ37SE
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
29,514 pcs available, New & Original
Parts Description
CONNECTOR
Package
Bulk
Data sheet
-
RoHs Status
 
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Our certification
In stock: 29514
  • Unit Price: $816.71
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $816.71 $816.71
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

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

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 mating cycles can the D38999/26WJ37SE connector handle before performance degradation occurs?
The D38999/26WJ37SE is designed for repetitive mating and unmating cycles typical of aerospace and military applications. The connector's contact design and shell engagement mechanism support hundreds of mating cycles without requiring replacement. Actual cycle life depends on insertion force consistency and contact pressure maintenance; operators should monitor for increased mating force as an early indicator that contact surfaces may require inspection. The D38999/26WJ37SE's gold-plated contact system resists oxidation across repeated cycles, which directly extends usable life compared to unplated alternatives.
How does the D38999/26WJ37SE compare to smaller-format circular connectors in high-vibration environments?
The D38999/26WJ37SE delivers superior vibration resistance due to its larger shell diameter and threaded coupling mechanism, which provides mechanical damping and reduces micro-motion at the mating interface. Smaller format connectors, while lighter, typically exhibit resonance issues in the 500–2000 Hz range and allow greater fretting corrosion under sustained vibration. The D38999/26WJ37SE's robust shell design and engagement threads maintain contact pressure stability even under continuous 10G+ vibration environments. Trade-offs include increased weight and panel cutout size requirements.
What is the moisture ingress risk for the D38999/26WJ37SE in salt-fog and humid storage conditions?
The D38999/26WJ37SE carries MSL 1 (Unlimited) rating, meaning it has no moisture sensitivity limitations and requires no special storage precautions. However, the connector itself is not sealed; environmental protection depends on mating configuration and cable grommet sealing. In salt-fog environments (ASTM B117), the D38999/26WJ37SE's gold-plated contacts exhibit excellent corrosion resistance over 500+ hours, significantly outperforming silver or tin finishes. Unsealed or partially mated D38999/26WJ37SE units should receive protective caps when stored in coastal or high-humidity facilities to prevent salt deposits on contact surfaces.
Can the D38999/26WJ37SE be reconfigured with different pin counts or contact arrangements after initial assembly?
The D38999/26WJ37SE shell and insert assembly are typically configured at manufacturing and not field-reconfigurable. Pin count, contact spacing, and signal/power distribution are determined during the initial build to the D38999/26WJ variant specification. Retrofitting the D38999/26WJ37SE with a different insert or contact layout requires complete reassembly by qualified facilities with precision tooling. Organizations requiring flexible pin configurations should specify modular connector families or negotiate custom D38999/26WJ37SE builds with Glenair during initial procurement to avoid redesign costs during production.
How does the D38999/26WJ37SE perform in aircraft cabin pressure differential and decompression scenarios?
The D38999/26WJ37SE is designed to maintain electrical continuity and mechanical stability across rapid pressure changes encountered during aircraft climb, descent, and emergency decompression. The connector's shell does not require pressure equalization; internal voids remain unaffected by external cabin pressure variations. However, rapid thermal gradients accompanying decompression (temperature swings of 50–80°C over minutes) can cause micro-expansion at the contact interface. The D38999/26WJ37SE's threaded coupling and spring-loaded contacts accommodate these micro-movements without loss of contact pressure, though thermal cycling may require periodic contact inspection in aircraft requiring frequent unpressurized operations.
What is the electrical performance difference between the D38999/26WJ37SE and fiber optic variants of the D38999 series?
The D38999/26WJ37SE is a contact-based electrical connector and does not support fiber optic signal transmission. Hybrid variants of the D38999 series integrate electrical contacts alongside fiber optic ferrules in a single shell. The D38999/26WJ37SE cannot be retrofitted with optical capabilities; fiber optic systems require purpose-designed hybrid D38999 configurations. If a design requires both electrical and optical connectivity, specifying a hybrid D38999 variant from the outset reduces integration complexity and cable harness costs compared to managing separate electrical (D38999/26WJ37SE) and fiber connectors in parallel.
What contact resistance specifications apply to the D38999/26WJ37SE, and how do they affect high-current applications?
The D38999/26WJ37SE contact resistance is typically specified in the 0.8–1.5 milliohm range per contact pair under standard test conditions (100-gram normal force, 10-cycle mating). In high-current applications (e.g., power distribution in aircraft or ground support equipment), cumulative resistance across multiple contacts becomes significant; a 37-pin D38999/26WJ37SE carrying 10 amperes per contact may generate 0.8–1.5 watts of dissipation depending on mating condition uniformity. Contact resistance increases measurably if gold plating wears or if oxidation forms; the D38999/26WJ37SE should be specified with regular electrical continuity verification intervals in current-critical applications to detect degradation before functional failure.
How does the D38999/26WJ37SE handle thermal cycling between –55°C and +85°C operational extremes?
The D38999/26WJ37SE shell material (typically aluminum alloy) and internal contacts (beryllium copper with gold plate) have different thermal expansion coefficients, creating differential stress during temperature swings. Over 100+ thermal cycles between –55°C and +85°C, the D38999/26WJ37SE may experience measurable increases in mating force and micro-changes in contact pressure distribution. The connector is designed to remain functional across these extremes, but frequent cycling (weekly or more often) in aerospace environments should be monitored for contact degradation. In applications subject to continuous thermal cycling, the D38999/26WJ37SE should be paired with conformal coating on mating contacts to reduce oxidation stress and maintain consistent electrical performance.
Is the D38999/26WJ37SE suitable for unmanned systems or autonomous platform applications with minimal maintenance access?
The D38999/26WJ37SE can be deployed in unmanned systems, but design considerations differ from crewed aircraft. Autonomous platforms typically encounter longer intervals between connector inspection and replacement; the D38999/26WJ37SE's robust gold-plated contact system extends shelf life and reduces mid-mission connector failure risk. However, unmanned systems operating in uncontrolled environments (dust, sand, salt spray) should incorporate protective caps or quick-disconnect shrouds around the D38999/26WJ37SE connector. Remote diagnostics or built-in contact resistance monitoring becomes critical when physical inspection is impossible; the D38999/26WJ37SE lacks integrated monitoring, so system-level electrical health checks should be designed into vehicle telemetry.
What procurement lead time and supply chain risk factors should be evaluated for D38999/26WJ37SE connectors?
The D38999/26WJ37SE is a mature aerospace standard connector with established supply chains; typical lead times range from 8–16 weeks depending on contact configuration and current market demand. Custom pin assignments or gold plating specifications for the D38999/26WJ37SE may extend lead times to 20+ weeks. Supply risk is moderate; multiple authorized distributors stock common configurations, but specialized variants (e.g., high-temperature contact sets) may require direct Glenair procurement. For long-term production programs, securing D38999/26WJ37SE supply agreements 12–18 months before first-unit production mitigates obsolescence risk and locks pricing against inflation.
How does the D38999/26WJ37SE shell size compare to other MIL-DTL-38999 connectors in terms of environmental sealing capability?
The D38999/26WJ37SE shell size supports standard environmental seals (elastomer boots and grommet compression) consistent with other mid-range D38999 variants. Larger D38999 shells (size 40+) accommodate more robust seal designs and higher IP ratings; the D38999/26WJ37SE achieves IP67 when properly mated with sealed cables. Environmental protection of the D38999/26WJ37SE depends critically on back-shell configuration and cable gland design rather than connector shell size alone. Applications requiring IP69K (high-pressure washdown) must specify the D38999/26WJ37SE with proprietary sealed back-shells or transition to larger D38999 sizes designed specifically for pressure-wash environments.
What quality assurance and traceability documentation is included with D38999/26WJ37SE shipments?
D38999/26WJ37SE connectors from Glenair include standard commercial traceability documentation (batch lot numbers, manufacturing dates). Aerospace-grade or military procurement typically requires additional certifications: material certs (MIL-A-27927 aluminum alloy, contact composition verification), test reports (contact resistance per MIL-DTL-38999, vibration endurance), and environmental compliance (REACH status, RoHS applicability). The D38999/26WJ37SE is REACH Unaffected, simplifying European market deployment without additional substance testing. For defense contracts or DO-254 design assurance, procurement specifications should mandate full traceability and third-party inspection reporting; standard catalog D38999/26WJ37SE shipments may not include this documentation without explicit purchase order requirements.

Parts with Similar Specifications

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

Product Attribute D38999/26WJ37SE D38999/26WJ37SE-LC D38999/26WJ37SE D38999/26WJ37SE
Part Number D38999/26WJ37SE D38999/26WJ37SE-LC D38999/26WJ37SE D38999/26WJ37SE
Manufacturer Amphenol Aerospace Operations Glenair Souriau-Sunbank by Eaton TE Connectivity Deutsch Connectors
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -

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    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.

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

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

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

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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
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Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
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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

Glenair
98D-D38999/26WJ37SE

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

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