HFV6-012H-TR 12V 30A 4-Pin SPST-NO Automotive Power Relay, QC Plug-in Terminals, 27VDC Max, 40125C, Fuse/Relay Box Replacement

HFV6-012H-TR 12V Automotive Power Relay (SPST-NO, 4-Terminal)This listing is for a replacement relay by OE/part number. Please confirm fitment by matching the OE number and your vehicle’s relay/fuse box diagram.Key SpecificationsOE reference: HFV6-012H-TR (HFV6/012H family)Coil: 12V DC, 90Ω (approx. 1.6W @ 12V); operating range 7.2–15VContacts: SPST-NO (1 Form A), 4 terminalsRating: 30A / 12V DC (resistive); switched voltage up to 27V DCContact material: AgSnO2; Operating temp: -40 to +125°CSize: 23 × 15.5 × 25.4 mm (approx.)What it doesAn automotive electromagnetic relay is used to switch higher current loads using a low-current control signal. The exact function depends on the circuit your vehicle assigns to this relay slot.Common symptoms of a failing relay (may vary by circuit)Intermittent operation of the controlled loadNo click/activation when commanded, or relay stuck ONHeat discoloration at terminals, burning smell, or melted socketInstallation remindersDisconnect battery power before replacement.Match OE number, terminal count (4), and SPST-NO function; do not substitute for 5-pin SPDT types.Seat the relay fully and verify the socket terminals are tight and not overheated.

• Specs & key points — OE ref: HFV6-012H-TR (also listed in component catalogs as HFV6/012H-T); electromagnetic plug-in relay; 12V DC coil; SPST-NO (1 Form A) contact; 4 terminals; rated 30A / 12V DC at resistive load, switched voltage up to 27V DC; coil resistance 90Ω (≈1.6W @12V) with coil operating range 7.2–15V; AgSnO₂ contact material; operating temp -40 to +125°C; compact body 23×15.5×25.4 mm. For 12V power switching where this HFV6 footprint is specified; replacing a worn/sticking relay can help reduce intermittent power to the controlled load (function depends on the circuit).
• Install & notes — Disconnect the battery before service. Use the owner’s manual/service diagram to locate the correct relay position; match the OE number (HFV6-012H-TR), terminal count (4), and SPST-NO function before swapping (do not replace a 5-pin SPDT relay with this model). Pull the old relay straight up, inspect the socket for heat/loose terminals, then press the new relay fully seated. Typical placement is a vehicle fuse/relay box or power distribution center (exact location varies by vehicle). Verify circuit current demand is within the relay rating; 12V coil only—do not use in 24V systems.