Deutsch DT Series 4-Pin Waterproof Connector – DT04-4P Male & DT06-4S Female

The Deutsch DT 4-pin connector is the most widely used configuration in the DT series — providing four sealed circuits in a compact IP67 housing that covers the majority of automotive sensor, actuator, and lighting harness applications. The 4-pin layout accommodates the most common wiring patterns: power + ground + two signal wires, or two independent switched circuits with shared power and ground. DT connectors use size 16 contacts (13A, 16–20AWG) — the general-purpose standard for automotive and agricultural wiring where wire gauge is larger than the DTM series allows.

Key Specifications

• Part Numbers: DT04-4P (male plug) + DT06-4S (female receptacle)
• Contact Size: Size 16 (13A continuous per pin, 16–20AWG)
• IP Rating: IP67 (mated) — 1m water immersion for 30 minutes
• Housing Material: Glass-filled nylon (PA66-GF), UL94 V-0
• Contact Material: Copper alloy, tin or gold-plated
• Operating Temperature: -55°C to +125°C
• Voltage Rating: 600V
• Mating Cycles: 50+ rated
• Quantity: 5, 10, or 100 sets (select above)

DT 4-Pin vs DTM 4-Pin — Size 16 vs Size 20 Contacts

Both DT04-4P and DTM04-4P are 4-pin Deutsch connectors, but they are NOT interchangeable:

• DT04-4P (this product): Size 16 contacts, 13A per pin, 16–20AWG. Larger housing. For power wiring, lighting, solenoid valves, and general harness applications where wire gauge is 16–20AWG.
• DTM04-4P: Size 20 contacts, 7.5A per pin, 20–24AWG. Smaller housing. For signal wiring, sensor outputs, ECU sub-harnesses, and CAN bus where wire gauge is 20–24AWG.
• Visual identification: DT housings are larger and have a more pronounced locking latch. DTM housings are noticeably smaller. If in doubt, measure the housing width: DT04-4P ≈ 25mm wide; DTM04-4P ≈ 18mm wide.

Common 4-Pin DT Wiring Patterns

• Sensor (power + 2 outputs): Pin 1 = +12V/+24V, Pin 2 = Output A, Pin 3 = GND, Pin 4 = Output B
• Dual solenoid valve: Pin 1 = +12V, Pin 2 = Solenoid A coil, Pin 3 = +12V, Pin 4 = Solenoid B coil (shared ground via chassis)
• Lighting (2-circuit): Pin 1 = +12V Circuit A, Pin 2 = +12V Circuit B, Pin 3 = GND A, Pin 4 = GND B
• CAN bus + power: Pin 1 = +12V, Pin 2 = CAN-H, Pin 3 = GND, Pin 4 = CAN-L

What Questions Does This Product Answer?

• "How do I tell DT04-4P from DT06-4S?" — DT04 = male plug (pins protrude from the mating face). DT06 = female receptacle (sockets recessed into the mating face). The ‘04’ and ‘06’ designations are consistent across all DT pin counts: DT04 is always male, DT06 is always female.
• "What is the maximum wire gauge for DT size 16 contacts?" — 20AWG minimum, 16AWG maximum for size 16 contacts. For 14AWG or 12AWG wire, use DTP series (size 12 contacts, 25A). Forcing oversized wire into size 16 contacts damages the contact barrel and causes high resistance.
• "Can I use DT connectors in a marine environment?" — Yes. IP67 rating provides protection against water immersion. For saltwater environments, use gold-plated size 16 contacts (instead of tin-plated) to prevent contact corrosion from salt spray and humidity.
• "How do I prevent terminal backout in a DT connector?" — Always install the W4S wedge lock after seating all terminals. The wedge lock is the primary anti-backout mechanism — without it, terminals can back out under vibration causing intermittent faults. Verify the wedge lock is fully seated (flush with the mating face) before mating the connector.

Typical Applications

• Agricultural equipment: John Deere, Case IH, New Holland sensor and solenoid valve harnesses
• Construction machinery: Caterpillar, Komatsu, Volvo CE control harnesses
• Automotive: Trailer lighting, off-road lighting, custom vehicle wiring, tow hitch harnesses
• Marine: Outboard motor harnesses, bilge pump wiring, navigation instrument connections
• Industrial: Mobile equipment harnesses, conveyor sensor wiring, outdoor control panels

Package Contents

5, 10, or 100 sets (select above) — each set: 1× DT04-4P male housing + 1× DT06-4S female housing + 8× size 16 crimp contacts (4 male + 4 female) + W4S wedge lock.