NVF4-3A-S80a 12V 80A 4-Pin Mini-ISO Automotive Power Relay, SPST-NO, Sealed Plug-in – Compatible with Standard 4-pin JD2912 Relay sockets – for Cooling Fan, Fuel Pump, Headlights, A/C Clutch

NVF4-3A-S80a 12V 80A Mini-ISO 4-Pin SPST-NO Automotive Relay (Sealed, Plug-In)High-current power relay for mini-ISO slots using a 4-pin Form 1A (normally open) contact. Built for demanding loads; sealed cover; plug-in blade terminals.Key SpecificationsSeries/code decode: NVF4-3 (family); A = Form 1A (SPST-NO); S = sealed cover; 80 = 80A contact rating; a = plug-in terminals.Coil: 12 VDC; mini-ISO footprint; bottom-view numbering 30/87 (load), 85/86 (coil).Contact rating (resistive): up to 80 A @ 14 VDC; max switching power 1120 W; max switching voltage 75 VDC.Body size (NVF4-3): approx. 29 × 29 × 26.5 mm.Operating range: −40 °C to +125 °C; sealed construction.Typical ApplicationsEngine cooling fan, fuel pump, headlamps/aux lights, A/C compressor clutch or blower, ABS feeds, and general power distribution where a NO contact is specified.Installation NotesDisconnect the negative battery cable.Locate the mini-ISO 4-pin relay position in the fuse/relay box (under-hood or interior).Confirm the bottom-view pin diagram and 12 V coil. Push the relay fully into the socket until seated.Reconnect battery and function-test the circuit per the service manual.Fitment Guidance & Cross-ReferencesUse in sockets that require a 4-pin Form 1A (SPST-NO), 12 V coil, mini-ISO relay with the same bottom-view layout. Same-family cross codes include NVF4-3A-Z80a (dust-cover) and NVF4-4a variants with mounting bracket. For harnesses, use a 4-pin JD2912-1H style socket.Always match coil voltage and pin layout to the original relay.

• Specs & Cross-Refs — Type: 4-pin SPST-NO (Form 1A); coil 12VDC; contact rating up to 80A @14VDC; mini-ISO plug-in terminals; sealed cover. Series coding decodes as: NVF4-3 (family), A=1A, S=sealed, 80=80A, a=plug-in. Compatible cross codes within the same family: NVF4-3A-Z80a (dust-cover), NVF4-4a-S80a (with bracket). Always match coil voltage and bottom-view pin layout.
• Install & Location — Seats into a standard mini-ISO 4-pin socket (JD2912 style). Usual locations are engine-bay fuse/relay boxes or interior junction blocks. Disconnect battery, confirm 30/87 (load) and 85/86 (coil) on the bottom-view diagram, press fully into the socket until locked, then function-test per service manual.
• Compatibility Check — Use when the original relay is marked NVF4-3A-S80a or an equivalent mini-ISO 4-pin, 12V coil, Form 1A part with identical socket pattern. Match the bottom-view numbering (30/87/85/86) and 12V coil; this ensures fit across vehicles/equipment that specify a 4-pin SPST-NO 80A relay.
• What It Fixes / Typical Uses — Restores switching in high-load circuits commonly assigned to 4-pin Form 1A relays: engine cooling fan, fuel pump, headlamps/aux lamps, A/C compressor clutch or blower, ABS power feeds, and general power distribution where a NO contact is required.
• Complementary Parts (for related slots) — 4-pin relay socket/harness: JD2912-1H; 5-pin changeover counterpart if your slot needs SPDT: NVF4-3C (Form 1C); bracketed variant for bolted mounts: NVF4-4a. Select by contact form (1A vs 1C), coil voltage (12V), and the same mini-ISO footprint.