TPSMB22A Equivalent & Substitute Parts

Part Overview

The TPSMB22A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA (SMB) package. This component is actively produced and AEC-Q101 qualified for automotive applications. Equivalent and substitute parts are identified based on matching electrical performance characteristics and package compatibility, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	18.8V
Voltage - Breakdown (Min)	20.9V
Voltage - Clamping (Max) @ Ipp	30.6V
Current - Peak Pulse (10/1000µs)	19.9A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-65°C ~ 175°C (TJ)
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the TPSMB22A are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 18.8V
Voltage - Breakdown (Min): 20.9V
Voltage - Clamping (Max) @ Ipp: 30.6V
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener

All identified substitute parts maintain these core electrical specifications and package requirements. Variations in peak pulse current ratings (19.7A to 102A) and operating temperature ranges are noted but do not preclude substitution within the specified electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	RoHS Status
TPSMB22A	Littelfuse Inc.	18.8V	20.9V	30.6V	19.9A (10/1000µs)	600W	DO-214AA, SMB	-65°C ~ 175°C	ROHS3 Compliant
P6SMB22A	Eaton - Electronics Division	18.8V	20.9V	30.6V	19.7A (10/1000µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	RoHS Compliant
SM6T22AY	STMicroelectronics	18.8V	20.9V	30.6V	102A (8/20µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	ROHS3 Compliant
SMBJP6KE22A-TP	Micro Commercial Co	18.8V	20.9V	30.6V	19.9A (10/1000µs)	600W	DO-214AA, SMB	-55°C ~ 175°C	ROHS3 Compliant
SM6T22A	STMicroelectronics	18.8V	20.9V	30.6V	102A (8/20µs)	600W	DO-214AA, SMB	-55°C ~ 150°C	ROHS3 Compliant
SM6T22A-E3/52	Vishay General Semiconductor - Diodes Division	18.8V	20.9V	30.6V	20A (10/1000µs)	600W	DO-214AA, SMB	-65°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain the core electrical specifications required for transient voltage suppression at 18.8V standoff and 30.6V clamping voltage. Selection among these parts is determined by the following factors:

Compliance and Certification: TPSMB22A, SM6T22AY, SMBJP6KE22A-TP, SM6T22A, and SM6T22A-E3/52 are ROHS3 compliant. P6SMB22A is RoHS compliant. TPSMB22A, SM6T22AY, and SM6T22A-E3/52 carry AEC-Q101 automotive qualification.

Operating Temperature Range: TPSMB22A supports -65°C to 175°C. SM6T22A-E3/52 supports -65°C to 150°C. SMBJP6KE22A-TP supports -55°C to 175°C. P6SMB22A, SM6T22AY, and SM6T22A support -55°C to 150°C. Selection depends on application temperature requirements.

Packaging and Availability: All parts are available in DO-214AA (SMB) surface mount package. TPSMB22A and SMBJP6KE22A-TP are supplied in Tape & Reel (TR). P6SMB22A, SM6T22AY, and SM6T22A are supplied in Cut Tape (CT) & Digi-Reel®. SM6T22A-E3/52 is supplied in Tape & Reel (TR).

Product Status: All substitute parts are active products with current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can P6SMB22A be used as a direct replacement for TPSMB22A?

A: P6SMB22A meets the core electrical specifications (18.8V standoff, 30.6V clamping, 600W peak power) and package requirements (DO-214AA, SMB). However, P6SMB22A operates at -55°C to 150°C versus TPSMB22A's -65°C to 175°C range. Verify application temperature requirements before substitution.

Q: What is the difference between SM6T22A and SM6T22AY?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications and operating temperature ranges (-55°C to 150°C). Both are ROHS3 compliant and AEC-Q101 qualified. The designation difference reflects internal manufacturer product line variations but does not affect functional equivalence.

Q: Why do some substitute parts show higher peak pulse current ratings (102A vs 19.9A)?

A: Peak pulse current is measured under different test conditions. TPSMB22A specifies 19.9A at 10/1000µs pulse width, while SM6T22A and SM6T22AY specify 102A at 8/20µs pulse width. Both measurements characterize the same device under different transient conditions. The clamping voltage (30.6V) remains constant across all parts and is the primary parameter for circuit protection.

Q: Is SM6T22A-E3/52 suitable for automotive applications?

A: Yes. SM6T22A-E3/52 is AEC-Q101 qualified and ROHS3 compliant, meeting automotive qualification requirements. Operating temperature range is -65°C to 150°C.

Q: Can SMBJP6KE22A-TP replace TPSMB22A in high-temperature applications?

A: SMBJP6KE22A-TP supports -55°C to 175°C, covering the upper temperature range of TPSMB22A (-65°C to 175°C). However, it does not support the lower -65°C limit. Verify minimum operating temperature requirements before substitution.

Q: Are all substitute parts available in the same packaging format?

A: No. TPSMB22A and SMBJP6KE22A-TP are supplied in Tape & Reel (TR). P6SMB22A, SM6T22AY, and SM6T22A are supplied in Cut Tape (CT) & Digi-Reel®. SM6T22A-E3/52 is supplied in Tape & Reel (TR). Verify packaging compatibility with assembly equipment and procurement requirements.

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