STGD18N40LZ-1 Equivalent & Substitute Parts

Part Overview

The STGD18N40LZ-1 is an IGBT (Insulated Gate Bipolar Transistor) manufactured by STMicroelectronics, rated for 420V collector-emitter breakdown voltage and 25A continuous collector current with a maximum power dissipation of 125W. This device is part of the PowerMESH™ series and features a through-hole TO-251 (I-PAK) package configuration.

The STGD18N40LZ-1 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Substiute Parts

STGD18N40LZ-1

STMicroelectronicsIn Stock: 846STGD18N40LZ-1 Datasheet

Current PartRFQ

STGD6NC60H-1

STMicroelectronicsIn Stock: 3663STGD6NC60H-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STGD18N40LZ-1 is constrained by the following critical electrical and mechanical parameters:

Voltage Rating: The main part operates at 420V maximum collector-emitter breakdown voltage. Substitute parts must maintain equal or higher voltage ratings to ensure safe operation within the original circuit design envelope.

Current Rating: The main part is rated for 25A continuous collector current. Substitute parts must support equal or higher continuous current ratings to prevent thermal stress and component failure.

Power Dissipation: The main part is rated for 125W maximum power dissipation. Substitute parts must support equal or higher power ratings to maintain thermal stability.

Package Configuration: The main part uses a through-hole TO-251 (I-PAK) package. Substitute parts must use identical or mechanically compatible package types to ensure PCB mounting compatibility.

Operating Temperature Range: The main part operates from -55°C to 175°C. Substitute parts must support equal or wider temperature ranges to maintain performance across the intended application environment.

Compliance Standards: Both parts must maintain ROHS3 compliance and REACH unaffected status to meet regulatory requirements.

The STGD6NC60H-1 is identified as a substitute part. However, this part exhibits reduced current rating (15A versus 25A) and reduced power dissipation (62.5W versus 125W), which represents a downgrade in electrical capability. This part is suitable only for applications where the original design can tolerate reduced current and power handling capacity.

Parameter Comparison

Engineering Selection Recommendations

STGD6NC60H-1 Substitution Considerations:

The STGD6NC60H-1 shares identical package configuration (TO-251 I-PAK through-hole) and maintains compliance with ROHS3 and REACH standards. Both devices are manufactured by STMicroelectronics within the PowerMESH™ series.

The STGD6NC60H-1 provides a higher voltage rating (600V versus 420V), which offers improved voltage margin for overvoltage transient protection. However, the STGD6NC60H-1 exhibits reduced continuous current capacity (15A versus 25A) and reduced maximum power dissipation (62.5W versus 125W).

The STGD6NC60H-1 operates within a narrower temperature range (-55°C to 150°C versus -55°C to 175°C), which may limit applicability in high-temperature environments.

The STGD18N40LZ-1 is obsolete with active product status for the STGD6NC60H-1, ensuring ongoing availability and manufacturing support for the substitute part.

Substitution of the STGD18N40LZ-1 with the STGD6NC60H-1 is permissible only in applications where circuit design can accommodate reduced current handling (15A maximum) and reduced power dissipation (62.5W maximum) without exceeding component thermal or electrical limits.

Frequently Asked Questions (FAQ)

Q: Can the STGD6NC60H-1 directly replace the STGD18N40LZ-1 in all applications?

A: No. The STGD6NC60H-1 has reduced continuous current rating (15A versus 25A) and reduced power dissipation (62.5W versus 125W). Direct substitution is only valid for applications where the circuit design operates within these reduced electrical limits.

Q: What is the primary advantage of the STGD6NC60H-1 over the STGD18N40LZ-1?

A: The STGD6NC60H-1 provides a higher voltage rating (600V versus 420V), offering improved margin for overvoltage transient protection. Additionally, the STGD6NC60H-1 is an active product with ongoing manufacturing support, whereas the STGD18N40LZ-1 is obsolete.

Q: Are the package configurations identical between these parts?

A: Yes. Both the STGD18N40LZ-1 and STGD6NC60H-1 use the TO-251-3 Short Leads I-PAK through-hole package, ensuring mechanical compatibility on PCB layouts.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the impact of the reduced gate charge in the STGD6NC60H-1?

A: The STGD6NC60H-1 has lower gate charge (13.6nC versus 29nC), which reduces gate drive power requirements and switching losses. This may improve overall circuit efficiency but does not affect substitution feasibility based on electrical ratings.

Q: Can the STGD18N40LZ-1 be used in place of the STGD6NC60H-1?

A: The STGD18N40LZ-1 has higher current and power ratings, but it is obsolete. Reverse substitution is not recommended due to product status and supply chain discontinuation.

Q: What is the temperature operating range difference between these parts?

A: The STGD18N40LZ-1 operates from -55°C to 175°C, while the STGD6NC60H-1 operates from -55°C to 150°C. Applications requiring operation above 150°C junction temperature cannot use the STGD6NC60H-1.