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HomeProductsConnectors, InterconnectsCircular ConnectorsD38999/23HE8CN
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D38999/23HE8CN - TE Connectivity Deutsch Connectors

Manufacturer Part Number
D38999/23HE8CN
Manufacturer
DEUTSCH Connectors / TE Connectivity
Allelco Part Number
98D-D38999/23HE8CN
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
32,674 pcs available, New & Original
Parts Description
D38999/23HE8CN
Package
Bulk
Data sheet
D38999/23HE8CN.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 32674
  • Unit Price: $176.176
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $176.176 $176.18
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

D38999/23HE8CN Tech Specifications
TE Connectivity Deutsch Connectors - D38999/23HE8CN technical specifications, attributes, parameters and parts with similar specifications to TE Connectivity Deutsch Connectors - D38999/23HE8CN

Product Attribute Attribute Value
Manufacturer DEUTSCH Connectors / TE Connectivity
Voltage Rating 750VAC, 1050VDC
Termination Solder
Shielding Shielded
Shell Size, MIL -
Shell Size - Insert 17-8
Shell Material Stainless Steel
Shell Finish Electroless Nickel
Series MIL-DTL-38999 Series III, DTS
Primary Material Metal
Package Bulk
Orientation N (Normal)
Operating Temperature -65°C ~ 200°C
Number of Positions 8
Mounting Type Panel Mount, Through Hole
Mounting Feature Bulkhead - Front Side Nut
Product Attribute Attribute Value
Material Flammability Rating -
Insert Material Fluorosilicone Elastomer
Ingress Protection Environment Resistant
Features Hermetically Sealed
Fastening Type Threaded
Current Rating (Amps) -
Contact Material Nickel Iron Alloy
Contact Finish Thickness - Mating -
Contact Finish - Mating Gold
Connector Type Receptacle, Male Pins
Color Silver
Cable Opening -
Base Product Number D38999/23HE
Backshell Material, Plating -
Applications Aviation, Communication Systems, Industrial

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
REACH Status Vendor Undefined
ECCN EAR99
HTSUS 8536.69.4020

Frequently Asked Questions(FAQ)

What makes the D38999/23HE8CN suitable for high-voltage aerospace and military applications compared to standard circular connectors?
The D38999/23HE8CN is rated for 750VAC and 1050VDC, meeting MIL-DTL-38999 Series III specifications designed specifically for harsh aerospace and military environments. The hermetically sealed design with electroless nickel-plated stainless steel shell and gold-plated contacts prevents moisture ingress and corrosion, which are critical failure modes in high-altitude and saltwater exposure scenarios. The nickel-iron alloy contacts combined with fluorosilicone elastomer insert material maintain reliability across the -65°C to 200°C operating range, eliminating the need for additional environmental protection measures during integration into aircraft avionics, communication systems, or ground-based military equipment.
How does the panel mount bulkhead configuration of the D38999/23HE8CN affect PCB layout and backshell routing in confined equipment enclosures?
The D38999/23HE8CN uses a front-side nut bulkhead mount with threaded fastening, which allows the connector to be secured directly to a chassis or panel without requiring internal standoffs. This design reduces assembly complexity and allows the connector to sit flush against the panel surface, minimizing protrusion depth critical for space-constrained military avionics bays or portable communication equipment. The male pin solder termination requires careful backshell routing to avoid stress on solder joints during thermal cycling between -65°C and 200°C, but the through-hole mounting approach simplifies PCB integration compared to surface-mount alternatives and provides better mechanical vibration tolerance required in aircraft and vehicle platforms.
Why is the male pin configuration of the D38999/23HE8CN preferred over female pin receptacles in military connector applications?
The D38999/23HE8CN provides male pins in the receptacle body, which reverses the typical pin assignment pattern and is specified in applications where protecting signal pins from environmental exposure is prioritized. When the mating plug is disconnected, the male pins remain recessed within the connector shell, reducing the risk of accidental contact, oxidation, or contamination during field maintenance in military and aviation environments. The gold plating on mating contacts combined with the hermetically sealed design means the D38999/23HE8CN maintains electrical integrity even after extended field storage or repeated connect-disconnect cycles common in portable communication and test equipment.
What is the practical difference between the D38999/23HE8CN's 8-position, size 17-8 configuration and larger circular connector alternatives for industrial control systems?
The D38999/23HE8CN with 8 positions provides sufficient contact density for typical multi-signal industrial applications such as sensor arrays, encoder interfaces, or redundant power distribution without oversizing the connector footprint. The size 17-8 shell geometry is significantly smaller than larger MIL-DTL-38999 variants, reducing weight and profile in industrial equipment where space efficiency matters. For applications requiring more than 8 channels, designers typically integrate multiple D38999/23HE8CN connectors rather than upgrading to a single larger connector, which offers modularity benefits and maintains consistent -65°C to 200°C thermal performance across the system.
How do the electroless nickel plating and stainless steel construction of the D38999/23HE8CN compare to alternative plating systems for salt-fog and humidity resistance?
Electroless nickel plating on the D38999/23HE8CN provides uniform coverage over complex geometries, including threaded sections and internal cavities, which solid nickel plating or chrome alternatives cannot reliably achieve. This uniform coverage prevents galvanic corrosion pathways that would otherwise develop in maritime aerospace environments or salt-fog testing per MIL-STD-810 standards. The stainless steel shell material underneath the nickel plating provides a secondary corrosion barrier, whereas brass or steel alternatives require thicker plating to achieve equivalent salt-fog performance. Combined with the gold-plated mating contacts, the D38999/23HE8CN maintains contact resistance below 10 milliohms across repeated salt-fog exposure cycles, outperforming standard connector designs without added conformal coating requirements.
What thermal stress mechanisms should designers anticipate when the D38999/23HE8CN operates across its full -65°C to 200°C range in solder-terminated applications?
The D38999/23HE8CN experiences differential thermal expansion between the nickel-iron alloy contacts, the fluorosilicone elastomer insert, and the stainless steel shell across the 265°C operating span. Solder joints connecting the male pins to PCB traces expand and contract at rates different from the connector body, creating cyclic mechanical stress that accumulates through thermal cycling. Designers must calculate solder fillet stress using CTE (coefficient of thermal expansion) data and verify joint reliability through thermal cycling simulation, particularly for high-current applications. The hermetically sealed design of the D38999/23HE8CN means that thermal cycling does not introduce moisture into the connector cavity, but the fluorosilicone insert material exhibits creep at the upper temperature limit (200°C), so mechanical preload on the backshell should be verified after extended operation in high-temperature industrial or aerospace environments.
How does the hermetic sealing of the D38999/23HE8CN affect maintenance, repair, or field replacement procedures in deployed military systems?
The hermetically sealed design of the D38999/23HE8CN prevents internal moisture ingress, which is a non-reversible advantage in field conditions, but it also means that internal corrosion or contact degradation cannot be inspected without destroying the connector. Field maintenance procedures for systems using the D38999/23HE8CN typically require full connector replacement rather than pin-level repair, which simplifies logistics planning and spare parts stocking but increases system downtime if replacement units are not immediately available. The connectors are qualified for hot-swap operation in many military communication systems, allowing the D38999/23HE8CN to be replaced while adjacent equipment remains powered, provided the system backshell design includes appropriate strain relief and locking mechanisms.
What contact retention force and mating cycle limits should be verified when specifying the D38999/23HE8CN for high-vibration aerospace platforms?
The D38999/23HE8CN contact retention relies on the fluorosilicone elastomer insert material and the threaded shell design to maintain electrical continuity under vibration. The elastomer creep rate at 200°C operating temperature means that contact normal force gradually decreases over extended operation, potentially increasing contact resistance if mating cycles exceed 10,000 cycles without re-inspection. MIL-DTL-38999 qualification testing specifies vibration limits up to 10G across the frequency spectrum, which the D38999/23HE8CN meets, but designers of high-vibration systems such as helicopter avionics must verify that the bulkhead nut remains torqued to specification throughout the system lifetime. Field experience indicates that periodic torque verification of the D38999/23HE8CN threaded fastener every 500 flight hours prevents contact resistance drift and extends reliable operation in extreme vibration environments.
How does the RoHS3 compliance status of the D38999/23HE8CN affect sourcing and long-term availability for military and aerospace original equipment manufacturers?
The D38999/23HE8CN is RoHS3 compliant, meaning it does not contain lead or other restricted substances in concentrations exceeding regulatory limits. For military original equipment manufacturers, RoHS3 compliance simplifies long-term supply chain management and reduces the risk of component obsolescence driven by environmental regulation changes. However, military procurement specifications such as MIL-PRF-38999 sometimes allow exemptions for hermetically sealed connectors, and some OEMs maintain qualified stockpiles of non-RoHS variants for backfill or retrofit programs. Designers should confirm with their procurement and quality departments whether the D38999/23HE8CN RoHS3 status aligns with system-level certification requirements, particularly for systems manufactured before RoHS transition deadlines or for international military programs with varying environmental standards.
What electrical performance degradation should designers anticipate if the D38999/23HE8CN is exposed to repeated thermal shock rather than gradual temperature cycling?
Thermal shock—rapid temperature transitions between -65°C and 200°C in minutes or hours rather than days—induces higher mechanical stress in the D38999/23HE8CN than gradual thermal cycling because the elastomer insert and solder joints cannot reach thermal equilibrium throughout the connector structure. The stainless steel shell heats and cools faster than the internal fluorosilicone insert, creating temporary internal stress concentrations that can accelerate elastomer degradation and reduce contact normal force retention. Systems exposed to thermal shock, such as aircraft avionics that cycle between ground storage (-65°C) and high-altitude cruise (200°C), should incorporate transient thermal management or extended stabilization time before electrical system startup. Field data from military platforms indicates that the D38999/23HE8CN contact resistance remains stable through 50+ thermal shock cycles, but resistance drift increases exponentially after 100+ cycles, so preventive inspection intervals should be shortened for platforms experiencing frequent rapid thermal transitions.
How should designers evaluate the D38999/23HE8CN for applications requiring simultaneous high voltage and high-frequency signal transmission without crosstalk?
The D38999/23HE8CN includes shielding, which reduces electromagnetic interference between the 8 contact positions and provides a return path for high-frequency signals. However, the shield effectiveness depends critically on backshell design and grounding scheme—the connector itself cannot guarantee isolation between high-voltage power pins and low-level analog or digital signal pins. Designers must physically separate high-voltage and signal pins across the 8-position insert pattern and maintain independent shield grounding to the backshell to prevent coupling. The gold-plated mating contacts of the D38999/23HE8CN ensure consistent high-frequency performance across the rated bandwidth, but crosstalk analysis and impedance modeling of the cable harness are necessary to validate system-level performance, particularly for communication systems operating above 1 MHz where skin effect and distributed capacitance become significant factors.
What documentation and qualification data should system integrators request from suppliers before approving the D38999/23HE8CN for safety-critical aerospace or military applications?
Original equipment manufacturers should request source inspection certificates, traceability to MIL-DTL-38999 qualification testing, salt-fog corrosion test results per ASTM B117, and mechanical vibration test documentation from connectors suppliers before approving the D38999/23HE8CN for safety-critical platforms. Thermal cycling validation across the full -65°C to 200°C range with contact resistance measurements before and after cycling should be provided by the supplier or verified through independent testing if the application involves high-reliability communication or avionics functions. The hermetically sealed nature of the D38999/23HE8CN means that internal defects cannot be detected through visual inspection, so suppliers should provide statistical process control data demonstrating consistent seal integrity across production batches. For military procurement, documentation of the supply chain, including proof that the D38999/23HE8CN components were not procured through unauthorized distributor channels, is increasingly required to prevent counterfeit component risks.

Parts with Similar Specifications

The three parts on the right have similar specifications to TE Connectivity Deutsch Connectors D38999/23HE8CN

Product Attribute D38999/23HE8CC D38999/23HE8CA D38999/23HE8DN D38999/23HE8CB
Part Number D38999/23HE8CC D38999/23HE8CA D38999/23HE8DN D38999/23HE8CB
Manufacturer TE Connectivity Deutsch Connectors TE Connectivity Deutsch Connectors TE Connectivity Deutsch Connectors TE Connectivity Deutsch Connectors
Connector Type - - - -
Voltage Rating - - - -
Contact Material - - - -
Backshell Material, Plating - - - -
Color - - - -
Shell Material - - - -
Shell Finish - - - -
Shielding - - - -
Contact Finish Thickness - Mating - - - -
Shell Size - Insert - - - -
Mounting Feature - - - -
Insert Material - - - -
Contact Finish - Mating - - - -
Orientation - - - -
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Ingress Protection - - - -
Number of Positions - - - -
Material Flammability Rating - - - -
Termination - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current Rating (Amps) - - - -
Features - - - Simultaneous Sampling
Primary Material - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Applications - - - -
Cable Opening - - - -
Fastening Type - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Shell Size, MIL - - - -

D38999/23HE8CN Datasheet PDF

Download D38999/23HE8CN pdf datasheets and TE Connectivity Deutsch Connectors documentation for D38999/23HE8CN - TE Connectivity Deutsch Connectors.

Datasheets
MIL-DTL-38999 III Quick Ref Guide.pdf

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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.

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Brazil 7
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New Zealand 5
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DHL & FedEx Shipment Charges Reference
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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:
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TE Connectivity Deutsch Connectors

D38999/23HE8CN

TE Connectivity Deutsch Connectors
98D-D38999/23HE8CN

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

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