AZ979-1A-12DE 12V 80A Mini-ISO Automotive Relay, SPST-NO 4-Pin, Diode Protected (+86), Epoxy-Sealed, Bracket Mount, 30VDC Switching for A/C, Cooling Fan, Fuel Pump, Lighting

AZ979-1A-12DE 12V 80A Mini-ISO Automotive RelayHigh-current SPST-NO (1 Form A) relay for 12V vehicle systems. Built-in coil diode (polarity: + on terminal 86) and epoxy-sealed housing for durability.Key SpecificationsContact rating: up to 80A (Form A), 30VDC max switching; silver tin oxide contactsCoil: 12VDC nominal, 90 Ω, must-operate 7.8 V, must-release 1.2 VTiming: operate ~7 ms, release ~5 ms (typ.)Environment: −40 °C to 85 °C operating; epoxy sealedPackage: Mini-ISO “Super-ISO” footprint, quick-connect blades, mounting bracketHow to Confirm CompatibilityThis relay is compatible with 12V circuits that require a Mini-ISO SPST-NO 4-pin relay with a diode-suppressed coil. Verify your original relay shows terminals 30, 87, 85, 86 and the same contact form. Check suppression type (diode vs resistor) and observe diode polarity during installation.Typical ApplicationsA/C compressor clutch, radiator cooling fan, fuel pumpHeadlamps/fog lamps, horn, auxiliary lighting and accessoriesWhat It SolvesReplaces a failed high-current relay causing no engagement or intermittent power to the load (e.g., A/C not engaging, fan not running, fuel pump not powering).Related & Complementary ItemsSockets: ST980 (4-pin), ST980-1 (5-pin)Family options: AZ979-1A-12D (non-epoxy), AZ979-1A-12DR (with resistor), AZ979-1C-12DE (SPDT)NotesMatch the pinout, contact form, suppression type, and current rating to your circuit. Install with the battery disconnected and test after replacement.

• Specs & order code: AZ979-1A-12DE = 1A (SPST-NO) 12V coil, “D” = diode across coil with + on terminal 86, “E” = epoxy-sealed; 80A max switched current (Form A), 30VDC max switched voltage, silver tin oxide contacts, coil resistance 90 Ω (12V), must-operate 7.8 V, must-release 1.2 V, typical operate/release 7 ms/5 ms, operating temp −40 °C to 85 °C; Super-ISO/Mini-ISO footprint with quick-connect blades and mounting bracket.
• Install & locations: drop-in for 12 V SPST-NO Mini-ISO 4-pin slots in common automotive fuse/relay boxes (engine bay or under-dash); match pins 30 (power in), 87 (load out), 85/86 (coil), observe diode orientation (+ to 86) per datasheet; mount via bracket if used; disconnect battery before service, seat fully, then function-test the controlled circuit (A/C clutch, cooling fan, fuel pump, lamps, horn, auxiliary loads).
• Compatibility guidance (how to confirm fit): compatible with circuits that specify a Mini-ISO SPST-NO 4-pin relay rated up to 80 A/30 VDC and a coil-suppressed (diode) design; verify the original relay’s pin labels (30-85-86-87), form (SPST-NO), suppression type (diode vs resistor/none), and bracket style to ensure a direct functional replacement; use when the system calls for high momentary current handling (up to 500 A carry, per family spec) and fast operate/release times.
• What it fixes (symptoms): restores power to high-draw 12 V loads when a worn relay causes intermittent/no-start of the A/C compressor clutch, radiator fan, fuel pump, lighting or accessories; reduces arcing versus underspec relays by using 80 A contacts and a diode-suppressed coil for cleaner switching when wired with correct polarity (+ on 86).
• Complementary parts & options: pair with Zettler sockets ST980 (4-pin) or ST980-1 (5-pin) for clean wiring; related AZ979 family options include AZ979-1A-12D (same form without epoxy seal), AZ979-1A-12DR (with parallel resistor), and AZ979-1C-12DE (SPDT version) — select by contact form, suppression and sealing to match your circuit’s spec.