IXSH45N120 IGBT Equivalent & Substitute Parts

Part Overview

The IXSH45N120 is a 1200V, 75A IGBT manufactured by IXYS in TO-247AD package configuration. This device is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design considerations. The part operates at maximum junction temperatures between -55°C and 150°C with a maximum power dissipation of 300W. Equivalent substitute parts must maintain electrical compatibility across voltage, current, and thermal operating ranges while accommodating the through-hole TO-247-3 package standard.

Substiute Parts

IXSH45N120

IXYSIn Stock: 2199IXSH45N120 Datasheet

Current PartRFQ

IGW40T120FKSA1

Infineon TechnologiesIn Stock: 1511IGW40T120FKSA1 Datasheet

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IKW40N120T2FKSA1

Infineon TechnologiesIn Stock: 280085IKW40N120T2FKSA1 Datasheet

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IKW40T120FKSA1

Infineon TechnologiesIn Stock: 1375IKW40T120FKSA1 Datasheet

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STGWA40H120DF2

STMicroelectronicsIn Stock: 15429STGWA40H120DF2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IXSH45N120 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mandatory Matching Criteria:

• Voltage - Collector Emitter Breakdown: 1200V (exact match required)
• Current - Collector (Ic) (Max): 75A minimum (equal or greater acceptable)
• Package / Case: TO-247-3 (mechanical compatibility)
• Mounting Type: Through Hole (board integration compatibility)
• Input Type: Standard (gate drive compatibility)

Secondary Compatibility Parameters:

• Operating Temperature Range: Must encompass or exceed -55°C to 150°C
• Vce(on) characteristics: Lower values indicate improved efficiency
• Switching Energy and Gate Charge: Affect circuit performance and driver requirements

All four substitute parts meet the mandatory criteria. The STGWA40H120DF2 provides the highest current rating (80A) and lowest switching energy characteristics. The Infineon TrenchStop® series parts (IGW40T120FKSA1, IKW40T120FKSA1, IKW40N120T2FKSA1) offer reduced switching losses and improved thermal performance compared to the original IXYS device.

Parameter Comparison

Engineering Selection Recommendations

For Existing System Support (Replacement Applications):

The STGWA40H120DF2 from STMicroelectronics is the primary recommendation for direct replacement in operational systems. This part maintains active product status, provides ROHS3 compliance, and extends the operating temperature range to 175°C. The superior switching characteristics (18ns/152ns turn-on/turn-off times versus 80ns/400ns in the original) reduce switching losses and improve thermal performance. The 80A current rating provides additional design margin over the 75A requirement.

For Legacy System Maintenance:

The Infineon IKW40N120T2FKSA1 offers the highest power dissipation capability (480W) and lowest switching energy (5.25mJ), making it suitable for applications requiring extended thermal headroom. This part is classified as "Not For New Designs" but remains available with substantial inventory (280,037 pieces). The extended temperature range to 175°C accommodates demanding thermal environments.

For New Design Implementations:

The STGWA40H120DF2 is the sole active-status device among the substitute options and is the appropriate selection for new circuit designs. Its active product status ensures long-term availability and continued manufacturer support. ROHS3 compliance and extended temperature range provide regulatory and environmental advantages.

Compliance Considerations:

All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the original IXSH45N120. All devices maintain Moisture Sensitivity Level 1 (Unlimited), eliminating special handling requirements during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the STGWA40H120DF2 directly replace the IXSH45N120 in existing circuit boards?

A: Yes. Both devices use the TO-247-3 package with identical pin configuration and mechanical footprint. The STGWA40H120DF2 maintains the 1200V voltage rating and 75A minimum current specification. No PCB modifications are required for mechanical compatibility. Circuit performance will improve due to lower switching losses and faster switching times.

Q: What is the significance of the "Last Time Buy" and "Not For New Designs" product status designations?

A: "Last Time Buy" indicates the manufacturer will accept final orders within a specified window before discontinuation. "Not For New Designs" means the manufacturer no longer recommends the part for circuit designs entering production. These designations reflect manufacturer lifecycle management and do not indicate technical deficiency. For replacement applications, these parts remain functionally valid. For new designs, the active-status STGWA40H120DF2 is the appropriate selection.

Q: How do the switching energy differences affect circuit design?

A: The IXSH45N120 exhibits 21mJ off-state switching energy, while the STGWA40H120DF2 delivers 1.32mJ (off-state). Lower switching energy reduces heat generation and driver circuit stress. The IKW40N120T2FKSA1 provides 5.25mJ, representing a middle ground. These differences directly impact thermal management requirements and gate driver selection but do not affect electrical compatibility in standard applications.

Q: Are there temperature range limitations when substituting the IXSH45N120?

A: The original IXSH45N120 operates from -55°C to 150°C. The IGW40T120FKSA1 and IKW40T120FKSA1 operate from -40°C to 150°C, reducing the lower temperature limit by 15°C. The IKW40N120T2FKSA1 and STGWA40H120DF2 extend the upper limit to 175°C. For applications requiring -55°C operation, the STGWA40H120DF2 is the only substitute maintaining the full lower temperature specification.

Q: What is the impact of higher gate charge on gate driver circuits?

A: The IXSH45N120 specifies 150nC gate charge. Substitute parts range from 158nC (STGWA40H120DF2) to 203nC (IGW40T120FKSA1 and IKW40T120FKSA1). Higher gate charge requires longer charging times and increased driver current capacity. Existing gate driver circuits designed for 150nC will accommodate the STGWA40H120DF2 (158nC) without modification. The Infineon parts with 192-203nC may require driver circuit evaluation in high-frequency applications.

Q: Do all substitute parts carry the same regulatory certifications as the original IXSH45N120?

A: Yes. All substitute parts maintain REACH Unaffected status, EAR99 ECCN classification, and Moisture Sensitivity Level 1 (Unlimited). The substitute parts additionally carry ROHS3 compliance certification, which the original part does not specify. This represents an environmental advantage for new applications and regulatory alignment with current standards.

Q: Which substitute part offers the best thermal performance?

A: The STGWA40H120DF2 delivers the lowest switching energy (1.32mJ off-state) and fastest switching times (18ns/152ns), resulting in minimal heat generation. The IKW40N120T2FKSA1 provides the highest maximum power rating (480W) and extended temperature range (175°C), offering superior thermal headroom for sustained operation. Selection depends on whether the priority is minimizing heat generation or accommodating high-temperature environments.