HMS31-K Reverse-Bayonet Circular Connectors, Solder Contacts
Reverse bayonet · solder contacts · IP65 · UL94 V-0
HMS31 Threaded Circular Connectors (MIL-DTL-5015 Type)
MIL-DTL-5015 type · threaded · contacts up to 150 A
HMS31 is our MIL-DTL-5015-type threaded circular connector for power and control circuits in rail, machine tools, industrial automation and electronics. Solder contacts from size 16 (13 A) to size 0 (150 A) and six service ratings up to 7000 V test voltage cover signal and power in one family.
- Coupling
- Threaded
- Shell sizes
- 8S to 40
- Current rating
- 13–150 A
- Test voltage
- Up to 7000 V
- Temperature
- −55 to +125 °C
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Key features
- MIL-DTL-5015-type threaded coupling; vibration and shock resistant
- Solder contacts from size 16 (13 A) to size 0 (150 A)
- Six service ratings from Instrument to C (up to 7000 V test voltage)
- Wall-mount, box-mount and in-line receptacles; straight and 90° plugs
- Solid or split backshells; plastic or neoprene inserts
- Five key positions: N, W, X, Y, Z
Specifications
| Parameter | Value | Condition |
|---|---|---|
| Test voltage | 1000–7000 V | By service rating — see service ratings |
| Insulation resistance | ≥ 5000 MΩ |
| Parameter | Value | Condition |
|---|---|---|
| Coupling | Threaded | |
| Durability | ≥ 500 mating cycles | |
| Operating temperature | −55 to +125 °C |
MIL-DTL-5015 (type) — Shell sizes, insert arrangements and service ratings follow the MIL-DTL-5015 system.
Parameters not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing.
Service ratings
Each insert arrangement has a service rating that sets its working and test voltage.
| Service rating | Test voltage | Working voltage DC | Working voltage AC |
|---|---|---|---|
| Instrument | 1000 V | 250 V | 200 V |
| A | 2000 V | 700 V | 500 V |
| D | 2800 V | 1250 V | 900 V |
| E | 3500 V | 1750 V | 1250 V |
| B | 4500 V | 2450 V | 1750 V |
| C | 7000 V | 4200 V | 3000 V |
Versions
| Series code | Version | Notes |
|---|---|---|
| 3100 | Wall-mount square-flange receptacle | |
| 3101 | In-line (cable) receptacle | |
| 3102 | Box-mount square-flange receptacle | |
| 3106 | Straight plug | |
| 3108 | 90° plug | |
| A / B | Solid / split backshell | |
| (none) / E | Plastic / neoprene insert |
Contact sizes and current ratings
| Contact size | Engaging diameter | Contact resistance | Current rating | Contact retention | Wire size |
|---|---|---|---|---|---|
| 16 | 1.6 mm | ≤ 2.5 mΩ | 13 A | 35 N | — |
| 12 | 2.4 mm | ≤ 1.3 mΩ | 23 A | 55 N | — |
| 8 | 3.6 mm | ≤ 0.9 mΩ | 46 A | 80 N | — |
| 4 | 5.7 mm | ≤ 0.5 mΩ | 80 A | 90 N | — |
| 0 | 9.1 mm | ≤ 0.2 mΩ | 150 A | 95 N | — |
How to order
HMS [type] [backshell] [shell]-[arrangement] [contact] [key] [insert]
Example: HMS3106A20-27PW — Straight plug, solid backshell, shell 20, arrangement 20-27, pin contacts, key W
| Code segment | Options |
|---|---|
| Type | |
| Backshell | |
| Shell and arrangement | |
| Contact | |
| Key | |
| Insert |
Tell us your MIL-DTL-5015 arrangement; the full layout list is supplied with the quotation.
Typical applications
- Rail vehicle control circuits
- Machine tools and CNC systems
- Industrial automation and power distribution
- Test and ground equipment
Frequently asked questions
Can you match my MS3106 or MS3102 part numbers with HMS31?
HMS31 follows the MIL-DTL-5015 system of shell sizes and insert arrangements. Send us your part number and we will propose the matching configuration and samples for your mating test.
Selection guides
Related series
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Rail vehicles · NF F 61-030 · IP67 · crimp contacts
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VG 95234 · reverse bayonet · IP67 · rail and maglev
From sample to production
Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.
Need a quote or a drawing?
Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.
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