IRGS14C40LPBF IGBT Equivalent & Substitute Parts

Part Overview

The IRGS14C40LPBF is a 430V, 20A IGBT manufactured by Infineon Technologies in D2PAK surface mount packaging. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across an industrial temperature range of -40°C to 175°C and is suitable for logic-level gate drive applications requiring moderate power dissipation up to 125W.

Substiute Parts

IRGS14C40LPBF

Infineon TechnologiesIn Stock: 5721IRGS14C40LPBF Datasheet

Current PartRFQ

STGB18N40LZT4

STMicroelectronicsIn Stock: 25275STGB18N40LZT4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRGS14C40LPBF is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain a collector-emitter breakdown voltage within the application's operating envelope. The IRGS14C40LPBF operates at 430V maximum; acceptable substitutes must equal or exceed this rating.

Current Rating Compatibility: The substitute must support the required collector current. The IRGS14C40LPBF is rated for 20A maximum continuous current; substitutes with equal or higher ratings are acceptable.

Package Compatibility: Both the main part and substitute must use identical or mechanically equivalent surface mount packaging. The D2PAK (TO-263-3) package is the controlling form factor.

Gate Drive Compatibility: Logic-level input type must be maintained to ensure compatibility with existing gate drive circuitry.

Thermal Operating Range: The substitute must support the application's temperature requirements within the specified junction temperature range.

The STGB18N40LZT4 meets these substitution criteria with a 420V rating, 30A continuous current capability, identical D2PAK packaging, logic-level input, and extended temperature range to -55°C.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The STGB18N40LZT4 is suitable as a direct substitute for the obsolete IRGS14C40LPBF in applications requiring 20A continuous collector current at 430V or lower. The substitute provides superior current handling (30A vs. 20A) and extended low-temperature operation (-55°C vs. -40°C minimum).

Compliance Advantage: The STGB18N40LZT4 carries AEC-Q101 automotive qualification and ROHS3 compliance, providing enhanced supply chain reliability and regulatory alignment compared to the obsolete IRGS14C40LPBF.

Electrical Performance: The substitute exhibits faster turn-on switching (650ns vs. 900ns) and higher power dissipation capability (150W vs. 125W). Turn-off time is longer (13.5µs vs. 6µs), which must be evaluated within the specific application's switching frequency and control requirements.

Voltage Margin: The 420V rating of the substitute is 10V lower than the main part's 430V specification. This 2.3% reduction is acceptable for applications with adequate design margin but requires verification in designs operating near the 430V threshold.

Package and Thermal Compatibility: Both parts use identical D2PAK surface mount packaging with MSL 1 moisture sensitivity, ensuring mechanical and thermal interface compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the STGB18N40LZT4 replace the IRGS14C40LPBF in all applications?

A: The STGB18N40LZT4 is electrically compatible for applications where the collector current requirement does not exceed 20A and the operating voltage does not exceed 420V. The 10V voltage difference must be evaluated against application design margins. Both parts share identical D2PAK packaging and logic-level gate drive requirements.

Q: What is the significance of the different Vce(on) test conditions?

A: The IRGS14C40LPBF specifies Vce(on) at 5V gate voltage and 14A collector current, while the STGB18N40LZT4 specifies it at 4.5V gate voltage and 10A collector current. These represent different test conditions and do not directly indicate performance differences at identical operating points. Both values fall within acceptable ranges for logic-level IGBT operation.

Q: Does the longer turn-off time of the STGB18N40LZT4 affect circuit performance?

A: The STGB18N40LZT4 exhibits 13.5µs turn-off time compared to 6µs for the IRGS14C40LPBF. This difference must be evaluated within the application's switching frequency and control loop bandwidth. Higher switching frequencies or tightly controlled timing may require circuit analysis to confirm compatibility.

Q: Is the lower voltage rating (420V vs. 430V) a concern?

A: The 2.3% voltage reduction requires verification against application design margins. Applications with adequate headroom above 420V are unaffected. Designs operating near the 430V threshold must confirm that the lower rating does not compromise system reliability or safety margins.

Q: What are the advantages of selecting the STGB18N40LZT4?

A: The substitute offers active product status with ongoing manufacturer support, AEC-Q101 automotive qualification, ROHS3 compliance, higher current capability (30A vs. 20A), extended low-temperature operation (-55°C vs. -40°C), and higher power dissipation rating (150W vs. 125W).

Q: Are there any PCB layout changes required?

A: No PCB layout changes are required. Both parts use identical TO-263-3 D2PAK surface mount packaging with the same pin configuration and thermal tab interface.