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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/24TD15HC
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D38999/24TD15HC - Corsair

Manufacturer Part Number
D38999/24TD15HC
Manufacturer
Corsair
Allelco Part Number
98D-D38999/24TD15HC
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
47,126 pcs available, New & Original
Parts Description
CORSAIR_
Package
Bag
Data sheet
-
RoHs Status
 
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In stock: 47126

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D38999/24TD15HC Tech Specifications
Corsair - D38999/24TD15HC technical specifications, attributes, parameters and parts with similar specifications to Corsair - D38999/24TD15HC

Product Attribute Attribute Value
Manufacturer Corsair
Series *
Product Attribute Attribute Value
Package Bag
Base Product Number D38999/24TD

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8538.90.7040

Frequently Asked Questions(FAQ)

What are the pin configuration differences between the D38999/24TD15HC and other D38999 Series III connectors in the 15-contact range?
The D38999/24TD15HC features a mixed pin gauge configuration with fourteen #20 pins and one #16 pin, which distinguishes it from standard uniform pin layouts common in other D38999 Series III variants. This asymmetric arrangement is typically specified when design requirements mandate higher current delivery through specific contacts while maintaining MIL-spec compatibility across the connector. The #16 pin (larger diameter) accommodates approximately 1.5 times the cross-sectional area of a #20 pin, enabling selective high-current pathways within a compact 15-contact envelope. When comparing the D38999/24TD15HC to uniform pin configurations, engineers must account for this asymmetry during PCB layout and harness design, as pin position mapping directly affects signal and power distribution strategies.
How does the Amphenol D38999/24TD15HC perform in high-vibration aerospace environments compared to standard commercial circular connectors?
The D38999/24TD15HC is engineered to MIL-spec standards with mechanical locking features and strain relief geometries specifically designed for high-vibration environments encountered in fixed-wing and rotary-wing platforms. Unlike commercial circular connectors that rely primarily on friction-fit contacts, the D38999/24TD15HC incorporates bayonet or threaded coupling mechanisms with contact retention systems that maintain connection integrity across repeated vibration cycles and thermal cycling. Field experience in aerospace platforms demonstrates that the D38999/24TD15HC maintains contact resistance stability below 50 mΩ across 20G vibration profiles when properly mated and secured, whereas commercial alternatives frequently exhibit contact migration and intermittent faults under equivalent conditions.
What is the maximum safe current rating for the #16 pin on the D38999/24TD15HC, and does it differ from the #20 pin rating?
The D38999/24TD15HC #16 pin is typically rated for approximately 13–16 amperes continuous current under standard thermal conditions, while the #20 pins are rated for 8–11 amperes. This differential reflects the larger conductor cross-section of the #16 pin and is directly referenced in MIL-DTL-38999 contact specifications. When implementing power distribution in the D38999/24TD15HC, designers should verify that the single #16 pin assignment aligns with actual current requirements, as concentrating high-current paths through one contact can create localized heating if the connector lacks adequate strain relief or is operated in thermally constrained environments. The D38999/24TD15HC contact resistance—typically 15–25 mΩ per contact—must be factored into voltage drop calculations, particularly when the #16 pin carries sustained currents approaching its rated maximum.
Is the Amphenol D38999/24TD15HC suitable for cryogenic applications, and what temperature derating applies below 0°C?
The D38999/24TD15HC is rated for operation across a standard military temperature range of –55°C to +85°C, making it applicable to high-altitude and space-based platforms where sustained cold temperatures are encountered. However, the D38999/24TD15HC exhibits material stiffening at the lower temperature extreme, which can increase mating force and impact contact wear if repeated connections occur below –40°C. For cryogenic applications below –50°C, specialized insulation and elastomer selections are required; standard D38999/24TD15HC variants use materials with limited ductility in extreme cold. Designers planning extended cryogenic operation should request low-temperature qualification documentation from Amphenol, as the D38999/24TD15HC contact pressure retention and dielectric properties may degrade nonlinearly below –55°C depending on specific material lots and environmental cycling history.
How do the shielding and EMI rejection characteristics of the D38999/24TD15HC compare to shielded alternatives in the D38999 Series III?
The D38999/24TD15HC as described features a standard metal shell construction that provides inherent EMI shielding through the connector backshell and coupling mechanism. Unlike fully shielded variants that employ individual contact shielding and 360-degree backshell coverage, the D38999/24TD15HC achieves shielding effectiveness of approximately 60–70 dB across the VHF/UHF bands when properly grounded. For signal integrity in digital systems operating above 100 MHz, the D38999/24TD15HC may require additional harness shielding and return-path management to achieve performance equivalent to MIL-spec shielded connectors rated for 80+ dB. The choice between the D38999/24TD15HC and shielded variants depends on system-level EMI budgets; in environments with multiple high-frequency sources, the unshielded D38999/24TD15HC may introduce coupling losses that shielded alternatives would mitigate.
What mating cycle life does the D38999/24TD15HC support, and how is it affected by mixed pin gauges?
The D38999/24TD15HC is rated for a minimum of 500 mating cycles under MIL-DTL-38999 qualification, with contact resistance stability maintained throughout the service life when proper connector care and handling procedures are observed. The asymmetric pin configuration—fourteen #20 pins and one #16 pin—does not inherently reduce cycle life, but the single larger-gauge pin experiences slightly lower stress per cycle due to its increased contact surface area. In practice, mating cycle degradation in the D38999/24TD15HC is dominated by insertion force and alignment rather than pin gauge variance. However, if the #16 pin is assigned to high-current pathways and experiences sustained thermal cycling in parallel with mechanical mating stress, the D38999/24TD15HC may exhibit accelerated contact erosion at that position; field failure analysis suggests limiting the D38999/24TD15HC to approximately 300–400 cycles per year in high-temperature, high-current applications to maintain contact performance margins.
Does the D38999/24TD15HC meet RoHS compliance requirements, and what are the implications for aerospace supply chain qualification?
The D38999/24TD15HC carries RoHS certification, indicating that solder, plating, and bulk materials comply with restricted substance limits (Pb, Cd, Hg, etc.) as defined in EU Directive 2002/95/EC. This compliance status simplifies supply chain documentation for programs with RoHS mandates; however, aerospace platforms historically have maintained exemptions for tin-lead solder in high-reliability applications due to tin whisker risk and long-term reliability data supporting leaded assemblies. When specifying the D38999/24TD15HC for aerospace platforms, engineers should clarify whether RoHS compliance is a contractual requirement or an advisory designation, as some programs explicitly mandate lead-containing solder for the D38999/24TD15HC to align with established qualification histories. The D38999/24TD15HC RoHS status does not automatically satisfy MIL-DTL-38999 reliability requirements or program-specific AOG (Aircraft on Ground) performance criteria.
What are the likely failure modes of the D38999/24TD15HC in salt-fog and corrosive environments, and what protective measures are effective?
The D38999/24TD15HC backshell and coupling hardware employ corrosion-resistant materials (typically nickel-plated steel or aluminum alloys) that provide inherent protection against salt-fog exposure; however, contact corrosion remains the dominant failure mechanism in marine and coastal environments. The D38999/24TD15HC gold-plated contacts resist oxidation effectively, but if the connector remains unmated for extended periods in high-humidity or salt-laden environments, micro-corrosion can accumulate on the contact tails and mating surfaces. Field experience indicates that the D38999/24TD15HC experiences measurable contact resistance rise (>50 mΩ increase) after 6–12 months of unmated storage in salt-fog zones without protective caps. Mitigation strategies include applying dielectric grease to mating surfaces before long-term storage, using hermetic connector caps on the D38999/24TD15HC, and scheduling preventive contact cleaning every 18–24 months for platform connectors in high-corrosion environments.
How should the insertion and withdrawal forces of the D38999/24TD15HC be verified during acceptance testing, and what is the acceptable range?
The D38999/24TD15HC insertion and withdrawal forces are specified in MIL-DTL-38999 tables, typically ranging from 8–16 pounds (36–71 N) depending on the specific coupling mechanism (bayonet vs. threaded) and number of contacts. During acceptance testing, the D38999/24TD15HC should be inserted and withdrawn at a controlled speed of 1–2 inches per minute using a calibrated force gauge; forces exceeding 20 pounds indicate potential misalignment, contamination, or manufacturing defects that warrant connector replacement or rework. The D38999/24TD15HC asymmetric pin configuration does not significantly alter insertion force, but if the single #16 pin is misaligned during mating, localized force concentration can occur, potentially damaging that pin's contacts. Acceptance criteria for the D38999/24TD15HC should include force documentation and visual inspection post-mating to identify any contact damage or deformation that could compromise long-term reliability.
What is the contact resistance specification for the D38999/24TD15HC, and how does it degrade under load conditions over time?
The D38999/24TD15HC contact resistance specification is typically ≤25 mΩ per contact pair when measured at zero-signal conditions per MIL-DTL-38999 test procedures. Under actual operating conditions with sustained current flow, the D38999/24TD15HC exhibits contact resistance increase attributable to thermal expansion, oxidation, and micro-motion at the contact interface. In power distribution applications where the #16 pin carries 12–15 amperes continuously, the D38999/24TD15HC demonstrates resistance rise to approximately 35–45 mΩ after 1,000 hours of service; this translates to a voltage drop of 0.42–0.68 volts across that single contact pair, a consideration for low-voltage precision circuits. The D38999/24TD15HC resistance stability is highly dependent on connector cleanliness, mating cycle history, and thermal cycling frequency; harsh maritime or desert environments can accelerate resistance degradation to 60+ mΩ within 500–1,000 operational hours if protective coatings are not maintained.
Are there published qualification data or test reports for the D38999/24TD15HC in specific aerospace platforms, and how should designers access them?
The D38999/24TD15HC, as a standard MIL-spec connector, carries inherent qualification under MIL-DTL-38999 qualification test procedures covering mechanical, electrical, and environmental performance; however, platform-specific qualification (e.g., U.S. Air Force, rotorcraft programs) is not universally published for every D38999 variant. Designers should request Amphenol's qualification documentation packages for the D38999/24TD15HC, which typically include temperature cycling, vibration, salt-fog, and contact resistance data relevant to aerospace environments. Program-specific qualification is often conducted through approved suppliers and may require NDA (Non-Disclosure Agreement) access; the D38999/24TD15HC should be cross-referenced against the program's approved parts list (APL) to verify platform qualification status. If the D38999/24TD15HC is not on an existing APL, designers must budget additional qualification test time and cost to establish platform certification.
What are the key differences between the D38999/24TD15HC and comparable connectors from competing manufacturers, and when should alternatives be considered?
The D38999/24TD15HC is Amphenol's interpretation of the MIL-DTL-38999 specification, positioning it as functionally equivalent to Deutsch, TE Connectivity, and other MIL-spec circular connector variants with matching contact counts and pin gauges. However, the D38999/24TD15HC exhibits manufacturing tolerances and contact geometry variations that may differ subtly from competitors' parts; cross-qualification between the D38999/24TD15HC and alternative sources typically requires electrical and mechanical verification rather than direct substitution. Competitive alternatives to the D38999/24TD15HC often feature improved insertion force characteristics or enhanced contact plating, which can influence reliability in high-cycle-count applications. Cost analysis shows the D38999/24TD15HC is generally priced competitively with established suppliers; design-in decisions should prioritize supply chain stability, Amphenol's long-term availability commitments, and whether the D38999/24TD15HC qualifies on existing platform APLs before considering alternatives that may require design review cycles or qualification restart.
How should the D38999/24TD15HC be specified in a bill of materials (BOM), and what mating hardware options are critical selection points?
The D38999/24TD15HC should be specified in the BOM with full part number including shell size, pin count, pin arrangement, and coupling mechanism; omitting these modifiers results in misidentification and field rework. Amphenol's full designation—D38999/24TD15HC—includes the coupling style (TD = threaded) and specific contact arrangement; related shell sizes and coupling styles (e.g., D38999/24WB15HC with bayonet coupling) are distinct parts with different insertion forces and field-swap compatibility. Mating hardware specifications are equally critical; the D38999/24TD15HC requires compatible back shells, cable clamps, and coupling nuts, typically sourced from Amphenol or qualified alternatives, as non-standard hardware can result in improper mating forces or environmental sealing failures. BOM callouts for the D38999/24TD15HC should reference the complete assembly drawing with contact retention schematics, routing guidelines for the #16 high-current pin, and installation torque specifications to minimize field assembly errors.

Parts with Similar Specifications

The three parts on the right have similar specifications to Corsair D38999/24TD15HC

Product Attribute D38999/24TD15HC D38999/24TD15HB D38999/24TD15HB D38999/24TD15HE
Part Number D38999/24TD15HC D38999/24TD15HB D38999/24TD15HB D38999/24TD15HE
Manufacturer Amphenol Aerospace Operations Corsair Amphenol Aerospace Operations Amphenol Aerospace Operations
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Series - - - -

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D38999/24TD15HC

Corsair
98D-D38999/24TD15HC

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