ABB RF3D-146-180 68973708
ABB RF3D-146-180 68973708
ABB RF3D-146-180 68973708
ABB RF3D-146-180 68973708
ABB RF3D-146-180 68973708

ABB RF3D-146-180 68973708 | Industrial Grade SSR Module for Motor/Heater Control

  • Brand: ABB
  • Model: RF3D-146-180 68973708
  • Product Type: Solid State Relay (SSR) Module
  • Series: RF3D Series
  • Core Function: Provides zero-crossing or random-switching control for high-current AC/DC loads with electrical isolation.
  • Key Specs: 180A switching capacity, 24-480V AC/DC input, 1000Vrms isolation, IP20 protection.
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Part number: ABB RF3D-146-180
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Description

RF3D-146-180 68973708: Product Overview
This component is a solid state relay (SSR) module from ABB’s RF3D series, designed for high-current switching applications in industrial automation systems. Its position in an automation system is as an interface between a control signal (e.g., from a PLC, DCS, or timer) and a high-power load (e.g., electric heaters, motor starters, or lighting circuits). It replaces electromechanical relays in applications requiring silent operation, fast switching, and long service life, typically mounted in control cabinets or panel-mounted assemblies.
The core functionality involves using semiconductor devices (thyristors or MOSFETs) to switch loads without moving parts. It accepts low-level DC control signals (24-480V) to trigger the SSR, which then conducts AC or DC load currents (up to 180A) with electrical isolation (1000Vrms) between control and load circuits. The module supports zero-crossing switching (for AC loads) to minimize inrush current and electromagnetic interference (EMI), or random switching (for precise timing control). It also integrates overcurrent and overtemperature protection to prevent damage from fault conditions.
This SSR belongs to the RF3D product family, a platform recognized for its robustness, compact design, and compliance with industrial safety standards (IEC 60947-4-3, UL 508). Benefits include silent operation (vs. mechanical relays), unlimited mechanical life (no contact wear), and fast switching times (<10ms) for dynamic load control. The series is engineered for continuous duty in sectors like plastics molding, HVAC, and heavy machinery, where reliability and low maintenance are critical.

ABB RF3D-146-180 68973708

ABB RF3D-146-180 68973708

RF3D-146-180 68973708: Technical Specifications
  • Model Number: RF3D-146-180 68973708
  • Manufacturer: ABB
  • Product Type: Solid State Relay (SSR) Module
  • Series: RF3D Series
  • Load Current Rating: 180A (AC/DC)
  • Load Voltage Range: 24-480V AC/DC
  • Control Voltage: 4-32V DC (standard), 24-265V AC (optional)
  • Switching Method: Zero-crossing (AC), Random (DC)
  • Isolation Voltage: 1000Vrms (control-to-load)
  • Operating Temperature: -40°C to +85°C
  • Protection Features: Overcurrent, Overtemperature, Short-Circuit
  • Response Time: <10ms (turn-on/off)
  • Mounting: Panel-mount (with heatsink)
  • Weight: 1.5 kg (with heatsink)
Core Features & Customer Value​
High current capacity handles demanding loads. The 180A rating supports large heaters, motor contactors, or resistive loads without derating, eliminating the need for multiple smaller relays in parallel. For engineers, this simplifies panel design; for end-users, it ensures reliable operation in high-power applications like plastic injection molding.
Zero-crossing switching reduces EMI and inrush current. For AC loads, the SSR triggers conduction at the voltage zero-crossing point, minimizing arcing and electromagnetic noise. This protects sensitive control electronics and extends the life of connected devices, critical in facilities with strict EMC requirements (e.g., hospitals, labs).
Electrical isolation enhances safety. The 1000Vrms isolation barrier prevents ground loops and transient voltages from propagating between control and load circuits. In chemical plants or outdoor installations, this protects operators and equipment from accidental shorts or lightning-induced surges.
Silent operation and long life improve maintenance efficiency. Unlike electromechanical relays, the SSR has no moving parts, eliminating contact bounce and audible clicking. This is valued in office buildings (HVAC) or clean rooms, while the unlimited mechanical life reduces replacement frequency, lowering spare parts costs.
Integrated protection safeguards against faults. Built-in overcurrent and overtemperature cutoffs prevent module damage during short circuits or blocked ventilation. Maintenance teams benefit from fewer unscheduled shutdowns, as the SSR self-protects without external fuses in many cases.

ABB RF3D-146-180 68973708

ABB RF3D-146-180 68973708

Typical Applications​
In a plastic injection molding machine, the SSR controls the 150A heating band around the mold barrel. Its zero-crossing switching minimizes EMI, preventing interference with the machine’s CNC controller, while the 180A capacity handles peak heating demands during startup.
For a commercial HVAC system, it switches 100A electric heaters in air handlers. The SSR’s silent operation avoids disturbing occupants, and its -40°C cold-start capability ensures reliable heating in unheated mechanical rooms.
In a metal plating line, the module controls DC power supplies to electroplating baths (180A, 48V DC). Random switching enables precise timing of plating pulses, while isolation protects the PLC from bath leakage currents.
At a wastewater treatment plant, it activates 200A submersible pumps via float switches. The SSR’s IP20 protection and overtemperature cutoff withstand humid, corrosive environments near sump pits.

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