SZP6SMB160AT3G Equivalent & Substitute Parts

Part Overview

The SZP6SMB160AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the SMB package. This component provides transient voltage protection with a reverse standoff voltage of 136V and clamping voltage of 219V at peak pulse current. The part is active in production and carries AEC-Q101 automotive qualification. Substitute parts are identified based on matching electrical characteristics and package compatibility within the TVS diode category.

Substiute Parts

SZP6SMB160AT3G

Littelfuse Inc.In Stock: 1429SZP6SMB160AT3G Datasheet

Current PartRFQ

1KSMB160A

Littelfuse Inc.In Stock: 92611KSMB160A Datasheet

MFR RecommendedRFQ

P6SMB160A

Eaton - Electronics DivisionIn Stock: 47348P6SMB160A Datasheet

MFR RecommendedRFQ

P6SMB160A

Eaton - Electronics DivisionIn Stock: 47348P6SMB160A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SZP6SMB160AT3G are qualified based on the following criteria:

Electrical Compatibility: Reverse standoff voltage of 136V, breakdown voltage minimum of 152V, and clamping voltage of 219V must be maintained. These parameters define the protection threshold and response characteristics.

Package Compatibility: Surface mount SMB package (DO-214AA) is required for mechanical and thermal compatibility.

Type and Configuration: Unidirectional Zener TVS diode with single channel configuration.

Current Rating: Peak pulse current tolerance within the application range. The main part specifies 2.7A; substitutes with higher current ratings (2.8A, 4.6A) remain compatible as they provide equal or greater transient handling capability.

Compliance Status: Active product status and RoHS3 compliance are maintained across all qualified substitutes.

Parameter Comparison

Engineering Selection Recommendations

P6SMB160A (Eaton - Electronics Division): This substitute maintains identical voltage specifications and 600W power rating. The peak pulse current of 2.8A is marginally higher than the main part (2.7A), providing equivalent protection margin. Operating temperature range is -55°C to 150°C, which covers standard industrial and telecom applications. RoHS compliance is confirmed. This part is suitable for direct substitution in non-automotive applications.

1KSMB160A (Littelfuse Inc.): This substitute maintains identical voltage specifications but provides enhanced transient handling with 4.6A peak pulse current and 1000W power rating. Operating temperature range is -55°C to 150°C. ROHS3 compliance is confirmed. This part is suitable for applications requiring higher transient energy absorption or where design margin is prioritized. The higher current rating does not create incompatibility with the original circuit design.

Automotive Considerations: The main part SZP6SMB160AT3G carries AEC-Q101 qualification. The substitute parts P6SMB160A and 1KSMB160A do not list AEC-Q101 qualification in the provided data. For automotive applications requiring AEC-Q101 certification, the original part SZP6SMB160AT3G must be retained.

Frequently Asked Questions (FAQ)

Q: Can P6SMB160A replace SZP6SMB160AT3G in all applications?

A: P6SMB160A matches all critical electrical parameters (voltage standoff, breakdown, clamping) and package specifications. However, the original part carries AEC-Q101 automotive qualification while P6SMB160A does not. Use P6SMB160A only in non-automotive applications or where automotive qualification is not required.

Q: What is the difference between 2.7A and 4.6A peak pulse current ratings?

A: Both ratings are compatible with the same circuit design. The 4.6A rating in 1KSMB160A indicates higher transient energy handling capability. This provides additional design margin and does not create incompatibility with circuits designed for 2.7A operation.

Q: Are all substitutes in the same SMB package?

A: Yes. All three parts use the DO-214AA SMB package, ensuring mechanical and thermal compatibility. No PCB layout modifications are required.

Q: What is the significance of the operating temperature range difference?

A: The main part operates from -65°C to 150°C, while substitutes operate from -55°C to 150°C. The substitutes have a narrower low-temperature range. For applications requiring operation below -55°C, the original SZP6SMB160AT3G must be used.

Q: Are there RoHS compliance differences?

A: The main part and 1KSMB160A are ROHS3 compliant. P6SMB160A is RoHS compliant. Both compliance levels meet current environmental regulations. ROHS3 represents a more recent standard revision.

Q: Can 1KSMB160A be used as a direct drop-in replacement?

A: Yes, for non-automotive applications. The higher power rating (1000W vs 600W) and current rating (4.6A vs 2.7A) provide enhanced protection without creating circuit incompatibility. Verify that your application does not require AEC-Q101 qualification.