BT151-650LTNQ

Scrs Overview

The BT151-650LTNQ is a sensitive gate silicon-controlled rectifier (SCR) manufactured by WeEn Semiconductors. It features a planar passivated structure designed for high reliability in through-hole applications. The device is rated for a maximum repetitive off-state voltage of 650 V and an on-state RMS current of 12 A. Key electrical characteristics include a gate trigger current of 5 mA, a gate trigger voltage of 650 mV, and a maximum holding current of 20 mA. It supports a non-repetitive peak on-state current of 120 A and operates within a temperature range of -40 °C to +150 °C. The component is housed in a TO-220-3 package.

Scrs Feature Summary

• Sensitive gate design enabling reliable triggering with low gate current requirements
• Planar passivated construction for enhanced voltage stability and robustness
• High thermal performance supporting operation up to 150 °C junction temperature

Scrs Applications

• High-voltage ignition circuits such as motorcycle and gas appliance igniters
• Voltage regulators and electronic ballasts
• Safety shutdown and protection circuits including circuit breakers and GFCI devices
• Surge protection systems in offline power supplies
• Small universal motor speed control for electric tools and kitchen appliances

Scrs Procurement Notes

Verify the specific ordering suffix LTNQ to confirm the tube packaging format, as other suffixes may indicate tape-and-reel configurations. Ensure the selected variant matches the required through-hole mounting style. Cross-reference the manufacturer part number against official WeEn Semiconductors documentation to confirm RoHS compliance status and exact pinout orientation for the TO-220-3 package before integration into production designs.

Scrs Selection Notes

Select this component when a sensitive gate SCR is required for direct interfacing with logic circuits or microcontrollers due to its low 5 mA gate trigger current. The 650 V rating makes it suitable for mains-connected applications requiring moderate blocking voltage. Consider the 12 A RMS current capacity for loads exceeding standard triac capabilities. The TO-220-3 package provides adequate heat dissipation for continuous operation in industrial or consumer electronics environments without additional external heatsinking for lower duty cycles.

Scrs Part Context

The BT151 series represents a family of general-purpose silicon-controlled rectifiers from WeEn Semiconductors. These devices utilize PNPN four-layer structures with P-type diffusion isolation for improved switching characteristics. The BT151-650LTNQ specifically belongs to the 650 V voltage class within this lineup, offering a balance of high current handling and precise gate sensitivity compared to higher voltage variants.

Scrs Replacement Considerations

Publicly confirmed substitute part numbers include the TYN612 from STMicroelectronics. Verify that alternative components match the 650 V blocking voltage, 12 A RMS current rating, and TO-220-3 package dimensions to ensure mechanical and electrical compatibility.