TPSMB75CA Equivalent & Substitute Parts

Part Overview

The TPSMB75CA is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for surface mount applications in the DO-214AA (SMB) package. This component is classified as Active product status and carries AEC-Q101 automotive qualification with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64.1	V
Voltage - Breakdown (Min)	71.3	V
Voltage - Clamping (Max) @ Ipp	103	V
Current - Peak Pulse (10/1000µs)	5.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65°C to 175°C	TJ
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Bidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

Voltage - Reverse Standoff (Typ): 64.1V
Voltage - Breakdown (Min): 71.3V
Voltage - Clamping (Max) @ Ipp: 103V (primary criterion)
Current - Peak Pulse (10/1000µs): 5.9A (primary criterion)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1

Substitute parts are grouped into two categories based on electrical equivalence:

Group 1 - Full Electrical Equivalents: Parts matching all primary electrical parameters (clamping voltage 103V, peak pulse current 5.9A) with identical package specifications.

Group 2 - Electrical Variants: Parts with identical standoff and breakdown voltages but differing clamping voltage or peak pulse current specifications. These parts operate within the same voltage protection window but with different transient handling characteristics.

Parameter Comparison

Parameter	TPSMB75CA (Littelfuse)	P6SMB75CA (Eaton)	SM6T75CAY (STMicroelectronics)	SMBJP6KE75CA-TP (Micro Commercial Co)
Voltage - Reverse Standoff (Typ)	64.1V	64.1V	64.1V	64.1V
Voltage - Breakdown (Min)	71.3V	71.3V	71.3V	71.3V
Voltage - Clamping (Max) @ Ipp	103V	103V	134V	103V
Current - Peak Pulse (10/1000µs)	5.9A	5.9A	30A (8/20µs)	5.9A
Power - Peak Pulse	600W	600W	600W	600W
Operating Temperature Range	-65°C to 175°C	-55°C to 150°C	-55°C to 150°C	-55°C to 175°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Type	Zener	Zener	Zener	Zener
Bidirectional Channels	1	1	1	1
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

P6SMB75CA (Eaton - Electronics Division) is designated as a manufacturer-recommended substitute. This part maintains full electrical equivalence with the TPSMB75CA across all primary parameters: 64.1V reverse standoff, 71.3V breakdown, 103V clamping voltage, and 5.9A peak pulse current. Both parts are RoHS compliant and carry MSL 1 rating. The operating temperature range of P6SMB75CA (-55°C to 150°C) is narrower than the TPSMB75CA (-65°C to 175°C), which may be a consideration for extreme temperature applications.

SMBJP6KE75CA-TP (Micro Commercial Co) provides full electrical equivalence with identical clamping voltage (103V) and peak pulse current (5.9A). This part supports the extended upper temperature limit of 175°C, matching the TPSMB75CA specification. ROHS3 compliance and MSL 1 rating are maintained.

SM6T75CAY (STMicroelectronics) is an electrical variant with higher clamping voltage (134V) and significantly higher peak pulse current (30A at 8/20µs pulse width). This part is suitable only when higher transient energy absorption is required. The part carries AEC-Q101 automotive qualification and ROHS3 compliance, matching the TPSMB75CA grade designation. Operating temperature range is -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: Can P6SMB75CA be used as a direct replacement for TPSMB75CA in all applications?

A: P6SMB75CA maintains electrical equivalence across all primary parameters and package specifications. However, the operating temperature range is limited to -55°C to 150°C compared to TPSMB75CA's -65°C to 175°C. Verify application temperature requirements before substitution.

Q: What is the difference between SM6T75CAY and the other substitute parts?

A: SM6T75CAY differs in two key electrical parameters: clamping voltage is 134V (versus 103V) and peak pulse current is 30A (versus 5.9A). This part is designed for applications requiring higher transient energy dissipation. Use only when circuit design specifically requires these higher ratings.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, maintaining mechanical and thermal compatibility with the TPSMB75CA.

Q: Which substitute part is recommended for automotive applications?

A: Both TPSMB75CA and SM6T75CAY carry AEC-Q101 automotive qualification. For direct electrical replacement, P6SMB75CA and SMBJP6KE75CA-TP are functionally equivalent but do not carry explicit automotive grade designation in the provided specifications.

Q: What is the significance of the MSL 1 rating across all parts?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control requirements. All listed parts share this specification, ensuring consistent handling and storage procedures.

Q: How do the RoHS compliance levels differ between parts?

A: TPSMB75CA, SM6T75CAY, and SMBJP6KE75CA-TP are ROHS3 compliant. P6SMB75CA is RoHS compliant. Both designations indicate lead-free construction; ROHS3 represents the current standard revision.

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