Deutsch Autosport AS 4-Way Inline — Socket (Female) — Yellow Key (A)
The Deutsch Autosport AS 4-Way Inline Socket (Female) Connector with Yellow (A) Keying Insert — SKU: AS112-04SA is a professional MIL-spec-grade Deutsch Autosport AS series inline connector for compact 4-wire sensor, switch, and actuator harness separable joins in race cars and high-performance vehicles across Norway, Sweden, and Denmark. Configured as an inline separable join — both halves are free, cable-mounted connectors within the wire run, creating a separable interface at any intermediate point in the harness without requiring a panel or bulkhead mounting point.
Deutsch Autosport AS 4-Way — Series Design and Circuit Count
The Deutsch Autosport AS series is the standard circular connector format for professional motorsport wiring — featuring an aluminium alloy shell machined to MIL-spec tolerances, gold-plated contact interfaces for low-resistance long-term electrical performance, and a positive push-pull locking mechanism that stays secure under sustained race vibration and rapid connector cycling at service intervals. The 4-way AS inline is the smallest standard circuit count in the AS series — used wherever only four circuits need to cross a harness separable join. Common applications include individual ignition coil sub-connectors, simple 4-wire sensor assemblies, and auxiliary switch circuit separable points on race cars. The 4-way shell prioritises minimal size and weight — ideal for sub-harness joins with a well-defined low circuit count.
Socket (Female) — 4-Circuit Contact Array
This listing is the socket half of the 4-way AS inline pair. Four gold-plated socket contacts receive the incoming pin terminals from the corresponding pin half — each socket completing one of the four circuits across this compact inline separable join. The corresponding pin half of the same circuit count and key colour is required to complete the mated connector pair — both halves must be ordered to form a functional inline separable join. AS contacts are ordered separately; select the correct contact part number for your wire gauge and current requirements.
Yellow Key (A) — The first keying position in the deutsch as system
Yellow A is universally the first key assigned when a harness design includes multiple 4-circuit AS inline connectors at the same separation point. It identifies the primary connector pair — the first 4-way inline in the harness plan, and typically the one most frequently disconnected and reconnected during race event preparation and servicing. The Yellow A physical key tab ensures this connector half can only mate with its own Yellow A counterpart, regardless of how many other 4-way AS connectors are present nearby. Professional harness builders across Norway, Sweden, and Denmark standardise on Yellow A as the primary key — ensuring consistent keying conventions across multiple builds and making harness identification straightforward for mechanics at events.
Inline Configuration — Flexible Harness Separation Without a Fixed Mount
The AS inline configuration places the separable join within the harness run itself — neither connector half is fixed to a panel or chassis surface. This makes it the preferred choice for engine-to-chassis harness separation points, subframe and removable component harness joins, and any separable interface along the wire run where flexible placement is required. The inline format is widely used across professional race car loom builds in Norway, Sweden, and Denmark for its placement flexibility and its clean, balanced appearance when both halves are routed through the same harness trunk or loom sleeve.
Technical Specifications
- Series: Deutsch Autosport AS
- Circuits: 4-way
- Configuration: Inline
- Contact type: Socket (Female)
- Key colour: Yellow (Key A)
- Shell material: Aluminium alloy
- Operating temperature: -65°C to +175°C
- Locking: Push-pull positive lock
- Typical application: The first or primary separable join of this circuit count on the harness
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