NGB18N40CLBT4

Overview

The NGB18N40CLBT4 is a logic-level N-channel IGBT designed for high-voltage, high-current switching in inductive coil drivers. It features monolithic circuitry integrating ESD and over-voltage clamped protection. Key electrical parameters include a collector-emitter voltage (Vces) of 430 VDC, continuous collector current (Ic) of 18 A at 25°C case temperature, and a pulsed collector current (Icm) of 50 A. The device has a maximum power dissipation of 115 W at 25°C. It operates within a junction temperature range of -55°C to +175°C. The saturation voltage (Vce(on)) is typically 1.8 V at Ic = 10 A and Vge = 4.5 V. It utilizes a D2PAK surface-mount package.

Feature Summary

• Integrates gate-emitter ESD protection and an internal gate resistor to eliminate external protection circuitry requirements.
• Features a temperature-compensated gate-collector voltage clamp that limits stress applied to the load during switching events.
• Includes emitter ballasting to enhance short-circuit capability and withstand time under fault conditions.
• Designed with low threshold voltage to facilitate direct interfacing between power loads and logic or microprocessor devices.

Applications

• Ignition systems
• Direct fuel injection circuits
• Coil-on-plug applications

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status as the standard part may not be compliant while the 'G' suffix variant is Pb-Free. Check datasheet revisions for updates on thermal characteristics and maximum ratings before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits requiring robust inductive load switching with integrated protection. Ensure the application voltage remains below the 430 Vdc rating and consider the 115 W power dissipation limit relative to the thermal resistance of the D2PAK package. Verify compatibility with logic-level gate drive voltages for optimal saturation performance.

Part Context

This device belongs to the NGB18N series of ignition IGBTs manufactured by onsemi. It is specifically engineered for automotive environments where high reliability against inductive kickback and electrostatic discharge is critical. The D2PAK package provides a compact solution for surface-mount assembly in space-constrained automotive modules.

Replacement Considerations

STGB20NB41LZT4 is listed as a similar replacement option from STMicroelectronics. Verify pinout compatibility and ensure the substitute meets the required 430 V breakdown voltage and 18 A continuous current specifications for the specific coil driver application.

FAQ

What is the single-pulse avalanche energy rating?

The single-pulse collector-to-emitter avalanche energy (Eas) is rated at 400 mJ at a starting junction temperature of 25°C and 300 mJ at 125°C, with Vcc = 50 V and peak inductor current of 21.1 A.

Does the device include an internal gate resistor?

Yes, the NGB18N40CLBT4 integrates an internal gate-emitter resistor (Rge) with a typical value of 16 kΩ, which simplifies the external gate drive circuit design.

What is the maximum short-circuit withstand time?

The device supports a short-circuit withstand time (tsc1) of 750 µs under specific test conditions involving three pulses with a 10 ms period, and tsc2 of 5.0 ms under different pulse configurations.