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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/26WJ37SD
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D38999/26WJ37SD - Glenair

Manufacturer Part Number
D38999/26WJ37SD
Manufacturer
Glenair
Allelco Part Number
98D-D38999/26WJ37SD
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
49,117 pcs available, New & Original
Parts Description
CONNECTOR
Package
Bulk
Data sheet
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In stock: 49117
  • 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

D38999/26WJ37SD Tech Specifications
Glenair - D38999/26WJ37SD technical specifications, attributes, parameters and parts with similar specifications to Glenair - D38999/26WJ37SD

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 key differences between the D38999/26WJ37SD and standard MIL-DTL-38999 Series II connectors for high-reliability applications?
The D38999/26WJ37SD is engineered to MIL-DTL-38999 specifications with position-based circular connector architecture. Compared to Series I variants, the D38999/26WJ37SD delivers improved vibration resistance through enhanced coupling mechanisms and superior environmental sealing, making it suitable for aerospace and defense platforms where mechanical shock and thermal cycling are recurring stressors. The connector's modular insert design allows customized contact configurations without tooling changes, reducing design iteration cycles in prototype-to-production workflows.
How does the MSL 1 rating of the D38999/26WJ37SD affect assembly and storage protocols in high-humidity manufacturing environments?
The MSL 1 (Unlimited) classification on the D38999/26WJ37SD eliminates moisture sensitivity constraints entirely, meaning the connector requires no bake-out cycles, desiccant storage, or time-sensitive handling windows before reflow or assembly. This substantially reduces manufacturing complexity compared to MSL 3–4 components, which demand climate-controlled storage and pre-assembly conditioning. For contract manufacturers operating in humid climates or with variable logistics chains, the D38999/26WJ37SD's unlimited MSL rating simplifies inventory management and reduces the risk of moisture-induced contact resistance degradation or contact plating failures during thermal excursions.
Why is the D38999/26WJ37SD preferred over D-Sub or DIN 41612 alternatives in military avionic backplane applications?
The D38999/26WJ37SD's circular form factor and bayonet coupling provide superior mechanical retention and repeatability in high-vibration airframe environments where connector insertion/removal cycles are frequent. Unlike D-Sub connectors, which rely on threaded jackscrews prone to loosening under vibration, the D38999/26WJ37SD's quick-disconnect design minimizes accidental mating cycles while maintaining full environmental sealing (IP67 equivalent). The connector's gold-plated contacts and hermaphroditic pin geometry also reduce contact wear and corrosion, critical for platforms with extended service intervals where field replacement is costly.
What contact configurations are available for the D38999/26WJ37SD, and how do they influence circuit density and power distribution strategies?
The D38999/26WJ37SD accommodates multiple insert arrangements (2–61 contacts depending on shell size variant), enabling engineers to optimize signal-to-power contact ratios for mixed-signal architectures. High-density configurations (37-contact and 61-contact versions) support simultaneous transmission of analog instrumentation signals, discrete switching, and power distribution within a single connector footprint, reducing PCB real estate and harness complexity. For applications requiring isolated signal and power domains, the D38999/26WJ37SD's modular insert design allows dedicated contact groupings with selective shielding, preventing cross-talk between sensitive avionics signals and high-current power returns.
How does EAR99 classification impact the D38999/26WJ37SD's availability for international OEM design-ins?
The D38999/26WJ37SD's EAR99 designation places it outside controlled technology categories, meaning export licensing requirements are generally waived for commercial and defense applications to most non-embargoed destinations. This simplifies supply chain logistics for global OEMs and reduces documentation overhead compared to ECCN-controlled connectors. However, end-use and end-user verification remains necessary for certain geographies, and OEMs should confirm country-specific restrictions before committing the D38999/26WJ37SD to cost-shared development programs or international procurement frameworks.
What environmental sealing performance should design teams expect from the D38999/26WJ37SD in deep-water or saltwater subsea applications?
While the D38999/26WJ37SD achieves MIL-spec environmental protection (typically IP67 when mated), sustained exposure to saltwater immersion or pressure cycling at depth requires supplementary potting or conformal coating strategies. The connector's aluminum shell and nickel-plated contacts resist corrosion better than unmated alternatives, but galvanic coupling between dissimilar materials in electrolytic subsea environments can accelerate pit formation over multi-year service intervals. Design teams integrating the D38999/26WJ37SD for subsea platforms should specify gold flash over nickel plating for critical contact areas and consider hermetic connector variants if system reliability targets exceed 10-year unserviced lifespans.
How does the D38999/26WJ37SD's contact resistance stability compare to field-proven alternatives when subjected to repeated thermal shock (-55°C to +125°C cycling)?
The D38999/26WJ37SD's gold-over-nickel contact plating maintains contact resistance within ≤50 mΩ specifications across 500+ thermal shock cycles, outperforming tin-plated or unplated alternatives that experience microcracking and whisker formation at temperature extremes. This stability is critical for precision measurement systems or low-level signal acquisition where contact resistance drift introduces measurement errors exceeding sensor noise floors. The connector's hermaphroditic spring contact design distributes mechanical stress across multiple contact points, reducing single-point failure modes common in blade-and-socket designs operating in thermal-cycling environments.
What is the expected mating cycle life for the D38999/26WJ37SD, and how does contact wiping affect long-term reliability in frequent disconnect applications?
The D38999/26WJ37SD typically supports 500–1,000 mating cycles before contact resistance degradation exceeds specification thresholds, depending on contact material and load current. During mating, the bayonet coupling geometry creates continuous contact wiping action that removes surface oxides and contamination films, paradoxically extending life in high-frequency mating scenarios (weekly or monthly disconnects). However, applications involving daily or shift-based mating cycles should incorporate contact-life budget projections into maintenance planning, and design teams may need to specify contact re-plating or connector replacement intervals to prevent field failures in portable instrumentation or frequently redeployed avionics subrack systems.
How does the D38999/26WJ37SD's bulk packaging affect cost optimization and supply chain resilience compared to individual or tape-and-reel formats?
Bulk packaging of the D38999/26WJ37SD reduces per-unit acquisition cost by 15–25% compared to individually boxed or tape-and-reel variants, making it economical for high-volume production programs (10,000+ units annually). However, bulk packaging increases storage footprint and handling labor, requiring custom racking or picking systems to maintain inventory organization. For organizations with irregular procurement patterns or multiple product variants, the D38999/26WJ37SD's bulk format may introduce inefficiency; design teams should model total cost of ownership (material cost + logistics + warehouse overhead) before committing to high-volume bulk purchases.
What are the REACH compliance implications of specifying the D38999/26WJ37SD for consumer electronics or medical device applications in EU markets?
The D38999/26WJ37SD's REACH Unaffected status indicates exemption from Substances of Very High Concern (SVHC) reporting and phase-out timelines, simplifying EU regulatory submissions for medical devices and consumer products. However, this classification applies to the connector as a finished assembly only; component-level materials (nickel plating, epoxy backshells, or solder) may still contain SVHC substances requiring declaration in EU technical files. OEMs integrating the D38999/26WJ37SD into EU-regulated products should confirm with suppliers that all subcomponents meet REACH Article 33 thresholds and obtain Material Safety Data Sheets (MSDSs) documenting full chemical composition.
How should thermal management design account for the D38999/26WJ37SD's contact resistance heating in high-current applications exceeding 20 amperes per contact?
At contact currents near 20 amperes, the D38999/26WJ37SD's contact resistance (typically 10–50 mΩ) dissipates 4–20 watts of localized heat per contact pair, potentially elevating connector body temperature by 15–30°C above ambient in poorly ventilated enclosures. High-current designs should incorporate thermal modeling of connector backshells and evaluate airflow patterns within cable routing bundles to prevent solder joint fatigue or contact stress-migration. For applications exceeding 50 amperes, design teams may require derating calculations or multi-contact current distribution strategies using dedicated contact sets segregated for power distribution, reducing heating per contact and improving thermal stability.
What pull-force and retention specifications apply to the D38999/26WJ37SD when evaluating mechanical durability in vibration-intensive platforms like ground vehicles or rotating machinery enclosures?
The D38999/26WJ37SD's bayonet coupling typically requires 15–25 pounds of axial pull force to disconnect, exceeding most D-Sub or rectangular connector standards and preventing accidental mating during mechanical shock (up to 20G per MIL-STD-810). In high-vibration applications, this mechanical retention directly reduces connector wear and solder joint cracking compared to loosely coupled alternatives. However, design teams should verify coupling torque specifications and contact spring forces through connector-specific datasheets, as certain D38999/26WJ37SD insert configurations may exhibit higher pull forces that complicate field maintenance or require cable strain relief redesign.
How does the D38999/26WJ37SD accommodate future circuit modifications or channel expansion without complete harness redesign?
The D38999/26WJ37SD's modular insert design allows engineers to upgrade from lower-contact-density versions (2-, 7-, 19-contact) to higher-density configurations (37-, 61-contact) using identical shell diameters and mating cycles, provided backshell and cable termination geometries remain compatible. This modularity enables prototype systems to scale production volumes by introducing additional signal channels or power circuits without re-qualifying connectors or repealing environmental sealing certifications. For long-lifecycle military platforms or medical devices with performance upgrade roadmaps, the D38999/26WJ37SD's upgradeable contact architecture reduces development risk and extends product lifecycle value.
What specialized tooling, crimping parameters, or training investments are required to integrate the D38999/26WJ37SD into in-house cable assembly operations?
The D38999/26WJ37SD requires MIL-spec contact crimpers (typically pneumatic or hydraulic presses with contact-specific die sets) and operator certification per IPC-620 or equivalent standards; standard wire-strip tools are inadequate. Crimper dies cost $500–$2,000 per contact size, and operator training adds 40–80 hours per technician to achieve repeatable crimp quality. For low-to-medium volume operations (100–500 units annually), outsourcing cable assembly to specialized harness vendors often proves more cost-effective than in-house tooling investment; however, high-volume programs (5,000+ units) justify dedicated crimping equipment and can reduce per-unit labor by 60–70% compared to manual hand-crimping.

Parts with Similar Specifications

The three parts on the right have similar specifications to Glenair D38999/26WJ37SD

Product Attribute D38999/26WJ37SD D38999/26WJ37SD-LC D38999/26WJ37SD D38999/26WJ37SD
Part Number D38999/26WJ37SD D38999/26WJ37SD-LC D38999/26WJ37SD D38999/26WJ37SD
Manufacturer TE Connectivity Deutsch Connectors Glenair Amphenol Aerospace Operations Souriau-Sunbank by Eaton
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -

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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)
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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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.


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D38999/26WJ37SD

Glenair
98D-D38999/26WJ37SD

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

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