Replacement for OE#RM1A60D50S333 Solid State Relay SSR, Zero-Cross 1-Phase 50A 42-660VAC Load, 4-32VDC Control, Panel Mount, 4-Terminal Screw Clamp, Built-in Varistor, LED Indicator

Solid State Relay (SSR) Replacement - Part #RM1A60D50S333This listing is for an AC solid state relay used to switch AC loads with a low-voltage DC control signal. Please confirm the full part number and electrical ratings match your original unit before purchase.Key SpecificationsType: AC Solid State Relay (zero-cross), 1-pole SPST-NO outputControl input: 4-32VDCLoad side: 42-660VAC, up to 50A (AC-51) / 15A (AC-53a)Terminals: screw clamp terminals (4 terminals: 2 control + 2 load)Protection/indication: built-in varistor surge protection, LED input statusWhat It DoesSwitches AC loads such as heaters, blowers/fans, motors, and lighting from a DC control signalZero-cross switching can help reduce electrical noise and stress during turn-on for many AC loadsSolid-state design for silent, fast switching (no mechanical contacts)Common Symptoms When a Relay Is FailingLoad does not turn ON/OFF as commandedIntermittent operation, flicker, or unstable load controlOverheating around the relay/heatsink area or discolored terminalsInstallation NotesDisconnect power before service and verify wiring/terminal markingsUse a suitable heatsink/metal panel and good thermal contact (thermal pad/compound recommended); ensure airflowGround the heatsink as required by the product’s safety guidanceAfter installation, confirm line voltage and load current are within spec; retighten terminals after a short runFitment reminder: Confirm fitment by OE/part number RM1A60D50S333 and your wiring diagram/manual. Do not order based on appearance alone.

• Specs & features: Zero-cross AC Solid State Relay (SSR), 1-pole SPST-NO output; Load 42-660VAC, 50A (AC-51), 15A (AC-53a); Control input 4-32VDC; built-in varistor for transient protection + LED status indicator. Designed for AC load switching (heater, blower/fan, motor, lighting, industrial control) where silent, fast switching is preferred; zero-cross turn-on helps reduce electrical noise and stress at start-up. Screw clamp/self-lifting terminals, supports conductors up to 16mm². Replacement Part #: RM1A60D50S333 (verify the full part number and terminal layout match your original before ordering).
• Install/replace tips: Disconnect power and confirm the application requires an AC solid state relay (SSR) (not a plug-in 12V micro relay). Mount on a proper heatsink/metal panel with good thermal contact (thermal pad/compound recommended); keep airflow and avoid mounting near high-heat sources. Heatsink should be connected to ground. Wire correctly: two terminals are 4-32VDC control input, and the other two are the AC load path—double-check terminal markings and the wiring diagram/manual. After install, verify line voltage/load current and tighten screw clamps; recheck after a short run for overheating or loose connections.