Unknown GPR921-2 Heat Sink Aluminum

The GPR921-2 is a heat sink-mounted power semiconductor module assembly designed for thermal dissipation and electrical interfacing within power control systems. It is typically used to regulate or rectify current in DC power supplies, servo drives, or motor control circuits where heat management is essential. Model: GPR921-2 Type: Heat Sink-Mounted Power Semiconductor Assembly Function: Power regulation, rectification, or switching with integrated heat dissipation Main Components: Power semiconductor device (likely SCR, TRIAC, or diode pack) mounted on aluminum heat sink Heat Sink Material: Extruded black-anodized aluminum Cooling Method: Natural convection via finned heat sink design Connector Type: 3-wire harness with Molex plug (blue, brown, white leads) Electrical Function: AC control or rectification circuit (typical of phase or bridge modules) Estimated Voltage Rating: 120–240 VAC (based on wiring gauge and connector type) Current Capacity: 5–15 A continuous (estimated based on heat sink size) Thermal Resistance: Approx. 3–5 °C/W (typical for similar fin profiles) Mounting: Panel or chassis mount with four through-holes on heat sink corners Insulation: Electrically insulated mounting base for isolation from chassis ground Operating Temperature: -20°C to +80°C Storage Temperature: -40°C to +100°C Dimensions: Approx. 100 mm × 80 mm × 40 mm (3.9 in × 3.1 in × 1.6 in) Weight: Approx. 300 g Markings: “GPR921-2” laser-etched on semiconductor module Application: Power supply output regulation, motor driver circuits, servo amplifier heat dissipation, or controlled rectifier stage Manufacturer: Unknown (industrial OEM, likely related to Star or ADJ series control assemblies) Country of Manufacture: Japan Please review pictures carefully and let us know if you have any questions!