891WP-1A-C Relay 12V DC Coil 25A 250VAC SPST 4-Pack PCB and Quick Connect Terminals Miniature General Purpose Power Relay for Compressor Motor Office Equipment Lamp Load Industrial Control

891WP-1A-C Relay 12V DC Coil 25A 250VAC SPST 4-Pack PCB and Quick Connect Terminals Miniature General Purpose Power Relay for Compressor Motor Office Equipment Lamp Load Industrial Control

• [PART NUMBER + SPECS CHECK] 891WP-1A-C miniature general purpose power relay with 12V DC coil, 0.9 W coil power, 25A 250VAC resistive contact rating, and SPST-NO (Form A, 1A) contact configuration. Housing marking verifies the 891WP-1A-C part number designation. Compare against equivalent 25A 12V DC SPST miniature relays in the matching 4-pin PCB footprint. Confirm coil voltage, contact rating, pin layout, and terminal type match the circuit specifications before ordering.
• [FUNCTION + CIRCUIT POSITION] Single Pole Single Throw, Normally Open (SPST-NO, Form A) electromagnetic power relay. Typical switching element used in: compressor load switching circuits, office equipment motor control, lamp load switching, appliance relay logic, water heater relay, HVAC blower relay, low-voltage lighting control, industrial control panels, battery management switching, UPS bypass circuits, and home automation relay control. Verify the relay function in your specific application by checking the equipment schematic, wiring diagram, or service manual.
• [ELECTRICAL SPECIFICATIONS] Coil voltage: 12V DC. Coil power: approximately 0.9 W. Contact rating: 25A at 250 VAC resistive (per manufacturer datasheet). Insulation resistance: 100 MOhm minimum at 500 VDC. Dielectric strength: 1000 VAC 50/60 Hz for 1 minute between open contacts; 4500 VAC 50/60 Hz for 1 minute between coil and contacts. Operate and release times per the manufacturer's datasheet. Ratings apply to resistive loads; derate for inductive, motor, or lamp inrush loads to avoid contact welding.
• [MECHANICAL & BUILD QUALITY] Flux-tight sealed plastic dust-cover housing, flame-retardant grade. Black sealed enclosure suitable for wave-solder and post-solder washing. Mechanical life: 5,000,000 operations. Electrical life: 100,000 operations at rated load. Operating temperature range: -40 Degree C to +85 Degree C. Compact rectangular package with 4 PCB through-hole pins at the base and 2 quick-connect blade outputs on top. Total dimensions approximately 30 x 16 x 23.5 mm (1.18 x 0.63 x 0.93 inch).
• [PIN CONFIGURATION & MOUNTING] 4-pin PCB through-hole (DIP) mounting with 2 quick-connect blade outputs on the top side. Pin 1 and Pin 2 are the coil terminals. Pin 3 is Common (COM). Pin 4 is Normally Open (NO). The two top-mounted quick-connect blades are wired in parallel with Pin 3 (COM) and Pin 4 (NO) for socket-mount applications. WP variant supports both PCB direct-mount and standard relay socket plug-in use. Match the original relay pin layout and footprint before installing.
• [CERTIFICATIONS & SAFETY] Per manufacturer datasheet, the 891 series carries CSA, cULus, and TUV safety certifications and is RoHS-compliant (2011/65/EU). Flux-tight construction protects internal contacts during PCB wave-solder and cleaning. Built-in coil suppression is not included; add a flyback diode (1N4007 or equivalent) across the coil terminals when switching inductive DC loads to protect driver circuitry from back-EMF. Each relay is inspected and tested before packaging.
• [TYPICAL APPLICATIONS] Engineered for: compressor load switching, office equipment motor control circuits, lamp and lighting load switching, water heater element control, HVAC blower motor relay circuits, low-voltage distribution panels, industrial control panel switching, battery management relay applications, DC motor direction and reversing circuits, UPS bypass and emergency power switching, home automation and appliance relay replacement.
• [PACKAGE CONTENTS] Pack of 4 (four) 891WP-1A-C 12V DC miniature general purpose relays in protective packaging. Each relay individually inspected before shipping. Ideal for service technicians, repair shops, and DIY builders who need multiple relays for multi-circuit projects or as spare parts. Bulk quantity keeps a ready replacement on hand for emergency field repairs and minimizes production downtime.
• [INSTALLATION TIPS] Disconnect all power before wiring. If replacing an existing relay, photograph the original wiring and pin layout first. Match coil voltage (12V DC), contact rating (25A 250VAC resistive), pin count (4 PCB pins + 2 quick-connect blades), and footprint (30 x 16 x 23.5 mm) before installing. Apply a flyback diode (1N4007 or similar) across the coil for DC-driven circuits to suppress back-EMF. Solder PCB pins with a temperature-controlled station; do not overheat the housing. Use a matching relay socket for quick swap-out serviceability. Ensure load current does not exceed 25A at the rated voltage and derate for inductive, motor, or lamp loads.
• [COMPATIBILITY NOTE] Industry series designations and form-factor names are used only for cross-reference identification. Verify original coil voltage, contact rating, pin footprint, and dimensions match the 891WP-1A-C specification before ordering. This 12V DC coil relay is not interchangeable with 24V DC, 36V DC, 48V DC, or any AC coil version of the same series. The 4-pin SPST-NO footprint is not interchangeable with 5-pin SPDT relays that include a Normally Closed terminal. Part number designations and series names are used only to verify compatibility.