BT151 500R – 500V 12 Amp SCR Package TO-220

BT151 500R – 500V 12A SCR (TO-220) delivers reliable controlled rectification for power switching and phase control applications. Designers integrate it in AC motor drives, lamp dimmers, power regulators, and other circuits requiring dependable silicon-controlled rectifier performance.

Key Features:

• High Voltage Rating: Withstands up to 500 V repetitive peak off-state voltage.
• High Current Capability: Carries up to 12 A RMS for robust power control.
• Low Gate Trigger Current: Ensures easy firing with simple gate drive circuitry.
• Reliable Latching and Holding: Provides stable conduction and fast switching response.
• TO-220 Package: Supports efficient heat dissipation with standard mounting.

Technical Specifications:

• Repetitive Peak Off-State Voltage (V_DRM, V_RRM): 500 V
• Average On-State Current (I_T(AV)): 12 A
• Peak One-Cycle Surge Current (I_TSM): ~110 A (10 ms half sine)
• Gate Trigger Current (I_GT): Typically 5–15 mA
• Holding Current (I_H): ~30 mA
• On-State Voltage Drop (V_T): ~1.6 V at rated current
• Operating Junction Temperature: –40 °C to +125 °C

Mechanical Specifications:

• Package Type: TO-220AB standard through-hole
• Mounting: Vertical PCB mount or chassis with heatsink
• Lead Finish: Tin-plated leads for solderability
• Body Material: Molded epoxy resin

Dimensions:

• Body Width: ~10.0 mm
• Body Height: ~15.0 mm (excluding leads)
• Lead Pitch: ~2.54 mm
• Overall Length: ~20 mm including leads

Pinout and Wiring:

• Pin 1: Anode
• Pin 2: Cathode
• Pin 3: Gate
• Wiring Note: Connect anode to positive rail, cathode to load/ground, and trigger with a small current on the gate to latch conduction.

Datasheet Reference:

• Consult the official BT151-500R datasheet from NXP/Philips for detailed electrical curves, thermal resistance, and safe operating area.

Applications:

• AC Motor Control: Provides controlled rectification for single-phase motors.
• Light Dimmers: Implements adjustable brightness control in AC lamp circuits.
• Power Regulators: Works in heating element control and voltage regulation.
• Phase Control Circuits: Operates in industrial power switching and automation systems.

Equivalent Models:

• TYN612: 12 A, 600 V SCR alternative
• MCR12DS: 12 A SCR from ON Semiconductor
• 2N6509: General-purpose SCR with similar current rating

Package Includes:

• 1 x BT151 500R – 500V 12A SCR (TO-220 Package)