Genuine OEM 12V Mini ISO Solid State Automotive Relay, 4-Pin SPST N/O, 20A Continuous, 0-1000Hz PWM Switching, Sealed IP67, Overload Protected 80A, Replaces OE 4RA 931 773-98/4RA931773-98

Mini ISO Solid State Relay Replacement (OE#4RA 931 773-98)Solid-state (electronic) relay designed for fast switching in 12V vehicle electrical systems. Confirm fitment by OE number and your vehicle wiring diagram/manual before purchase and installation.Key SpecificationsNominal voltage: 12V; max coil voltage: 16VContact form: SPST (Form A) Normally Open; 4-pin terminals 30/85/86/87 (6.3mm x 0.8mm)Rated continuous load: 20A; overload protection: 80ASwitching: 0-1000 Hz (PWM-capable); fast response (typ. 100/75 us)Sealed cover, IP67; operating temperature: -40C to +125CCommon Signs a Relay May Be FaultyLoad does not turn on, turns off intermittently, or only works when tapped/movedHeat at the relay/socket terminals, discoloration, or melted connector (inspect wiring safely)Control signal is present but the load is not switching (verify with a meter)Installation NotesDisconnect the battery. Even if the housing fits a mini ISO socket, match wiring by terminal numbers and your vehicle diagram (pin functions can differ versus a mechanical relay). Use proper suppression for inductive loads and keep terminals tight to reduce heat.

• Specs: 12V nominal mini ISO solid state automotive relay, 4-pin SPST (Form A) Normally Open (N/O); 20A continuous load at 85C, overload protected at 80A; switching frequency 0-1000 Hz (PWM capable) with fast response (typ. operate/release 100/75 us). Sealed IP67 cover for dust/water exposure; rated -40C to +125C; terminal IDs 30/85/86/87 with 6.3mm x 0.8mm blades. Electrical notes: on-voltage <9.0V, off-voltage >11.5V, max coil voltage 16V. Replacement for OE#4RA 931 773-98; reference PN H41773001 / 931773987. Keywords: solid state switch, power relay, mini ISO 4 pin, terminal 30 85 86 87.
• Install/replace tips: Disconnect battery before service. Fits many mini ISO relay sockets, but terminal functions may differ from a mechanical relay- match by terminal numbers (30/85/86/87) and your wiring diagram. Common guidance: 30=key-on +12V, 85=ground, 86=control signal (often ground-trigger), 87=to load; confirm for your circuit. Typical locations: under-hood fuse/relay box or auxiliary relay panel- verify in vehicle manual. For motors/fans/pumps and other inductive loads, current capacity may be reduced; add proper suppression and secure connections. Fitment check: confirm OE#4RA 931 773-98 and socket/pinout in your vehicle manual.