Deutsch DT Series Cross-Reference: DT, DTM, DTP & DTHD Part Numbers Explained
Time:2026-11-09
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Deutsch DT is the de-facto standard waterproof connector across automotive, truck, agricultural and construction harnesses — and its part-number format is a small code worth learning, because once you can read it you can spec the right half from memory and spot a drop-in equivalent immediately.
Decoding the part number
A part like DT04-6P breaks down cleanly: DT04 is the receptacle (panel/device side), DT06 is the plug (cable side), the number after the dash is the cavity count (2, 3, 4, 6, 8 or 12), and the suffix letter is contact gender — P = pin (male), S = socket (female). Mating pairs always use opposite suffixes: DT04-6P mates with DT06-6S. A trailing code like E005 or C017 is a keying option that prevents mismating in multi-connector harnesses.
The four series at a glance
| Series | Contact Size | Current | AWG | Cavities | Best For |
|---|---|---|---|---|---|
| DTM | Size 20 | 7.5 A | 20–24 | 2–12 | Sensors, signal lines |
| DT | Size 16 | 13 A | 14–20 | 2–12 | General harness work |
| DTP | Size 12 | 25 A | 12–14 | 2–4 | Medium-current power |
| DTHD | Size 4 / 8 | 100–150 A | 4–8 | 1–2 | Battery, starter circuits |
The rule of thumb is simple: DTM for low-current signal lines, DT for the majority of harness work (sensors, lighting, control circuits), DTP for moderate power up to 25 A, and DTHD for very high current like battery interconnects. All share the same sealed, wedge-lock construction with silicone wire seals and a -55 to +125 °C operating range.
Amphenol AT: the cross-compatible sibling
The DT form factor is an open industry standard, and Amphenol AT Series is dimensionally and electrically interchangeable with it — same Size 16 contacts, same housing geometry, same cavity arrangements and wedge-lock interface. AT plugs mate with DT receptacles and vice versa, and contacts and wire seals cross over across the same cavity count. For most harness applications the two are interchangeable.
We manufacture Deutsch DT-compatible sealed connectors — DT04/DT06-style receptacles and plugs in the common 2, 3, 4, 6, 8 and 12-way counts, plus matching Size 16 terminals and wedge locks — in our Shenzhen factory. Same IP67 sealing and 13 A per contact, at factory-direct pricing, with lower MOQs and shorter lead times than a branded purchase.
Frequently Asked Questions
What is the difference between DT04 and DT06?
DT04 is the receptacle (panel/device side), DT06 is the plug (cable side). They mate together; the number after the dash is the cavity count and the suffix is contact gender (P = pin, S = socket).
Is Amphenol AT interchangeable with Deutsch DT?
Yes, in most configurations. AT shares the Size 16 contact, housing geometry and wedge-lock interface, so AT plugs mate with DT receptacles and vice versa.
What do the E005 and C017 suffixes mean?
They are keying options that prevent a connector from mating with the wrong DT connector in a multi-connector harness.
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