ACP331 CP1a-12V Automotive PCB Relay, SPST-NO 1 Form A, 12V Coil, 20A @14V, 4-Pin, Sealed for Window, Door Lock, Blower, Wiper Circuits

아마존 달러(USD) 가격을 각 날짜의 환율로 원화 환산해 표시합니다. 현재 환율 $1 = ₩1,463 (2026-07-26 기준)

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• SPEC & REFERENCES — 12V DC coil (≈225Ω, ≈53.3 mA), SPST-NO 1 Form A, sealed PCB type; switching capacity 20A @14V DC; usable coil 10–16V; compact ≈13×14×9.5 mm body; contact resistance ≤100 mΩ (typ. ~6 mΩ N.O.); reference codes on boards: CP1a-12V = ACP331; common suffixes include CP1A-12V-X, CP1a-12V-H104/H78. Compatible with modules that originally used CP1a-12V/ACP331.
• INSTALL LOCATION & METHOD — PCB-mounted relay used inside body control modules, junction/fuse boxes, HVAC/defogger control, power window/door/sunroof boards, steering-lock (ELV) units and similar. Desolder the original 4-pin device, match pin footprint/orientation (N.O./coil), clean pads, solder the new relay; avoid overheating; observe ESD precautions. This is not a plug-in socket relay; it solders directly to the board
• FUNCTION FITMENT — Compatible with Power Window Relay (PCB) replacement in modules that originally used CP1a-12V/ACP331; supports motor loads up to 20A @14V DC. Typical symptoms this fixes: windows not moving, intermittent or stuck operation, clicking/no-engage, or overheating relay on the board. Verify current path and board traces before replacement.
• FUNCTION FITMENT — Compatible with Door Lock/Trunk Release Relay (PCB) in BCMs using CP1a-12V/ACP331 footprints. Restores reliable actuation where the relay sticks or the coil fails. Check driver transistor/diode and measure coil drive (operate ≤7.2V; release ≥1.0V) per datasheet before condemning the relay.
• FUNCTION FITMENT — Compatible with Blower/Defogger Relay (PCB) in HVAC control boards designed around CP1a-12V/ACP331. Addresses no-blower, blower only on high, or random shut-off caused by worn contacts. Inspect solder joints for heat cracks; confirm motor current ≤20A and board traces are intact.
• FUNCTION FITMENT — Compatible with Wiper/Sunroof Relay (PCB) in control units that specified CP1a-12V/ACP331. For heavy wiper loads, designers often use the CP1W-12V variant; if your board calls CP1W, use that dedicated part. For general 1 Form A designs that say CP1a-12V (ACP331), this relay is the correct form/footprint.
• FUNCTION FITMENT — Compatible with Steering Lock/ELV board repairs where the original relay is marked CP1a-12V (ACP331). Common fault patterns: no crank due to immobilizer/ELV not releasing, intermittent steering unlock. Only replace if your board silkscreen or pulled relay shows CP1a-12V/ACP331.
• COMPLEMENTARY PARTS — For circuits requiring SPDT contacts use CP1-12V (ACP131) from the same family; for wiper-load optimized designs use CP1W-12V (Panasonic CP series). Related consumables for a reliable repair: quality flux, solder wick/hot-air rework, isopropyl cleaning, and protective conformal coating if the OEM used it. These items reduce callbacks after board-level relay replacement.
• ENGINEERING DATA — Rated 25–30A continuous carry (board and ambient dependent) and up to 40A for 2 minutes; operating current approx. 53.3 mA @12V with 225Ω coil; sealed construction resists flux ingress during soldering. Designed for automotive use cases (windows, locks, sunroof, wiper, defogger, blower, EPS, ABS) per CP-series application notes.
• CHECK BEFORE YOU BUY — This is a PCB-soldered micro relay. Confirm your board or the pulled part is marked CP1a-12V or ACP331 and that the 4-pin footprint matches; compare dimensions (approx. 13×14×9.5 mm). If your board specifies a different series (e.g., CP1W or a plug-in ISO micro relay), select that exact part for best results.

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