TPSMC22HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC22HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in automotive-grade circuits requiring transient overvoltage protection. The part operates with a reverse standoff voltage of 17.8V and provides clamping at 31.9V with peak pulse current handling of 47A.

The TPSMC22HE3_A/I is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	17.8	V
Voltage - Breakdown (Min)	19.8	V
Voltage - Clamping (Max) @ Ipp	31.9	V
Current - Peak Pulse (10/1000µs)	47	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-65 to 185	°C (TJ)
Package / Case	DO-214AB (SMC)	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the TPSMC22HE3_A/I is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Reverse standoff voltage tolerance (17.8V nominal range)
Breakdown voltage minimum threshold (19.8V minimum)
Clamping voltage at peak pulse current (31.9V maximum)
Peak pulse current capability (47A minimum)
Peak pulse power dissipation (1500W minimum)

Mechanical & Environmental Parameters:

Package type: DO-214AB (SMC) surface mount
Operating temperature range: -65°C to 185°C
Automotive grade classification
AEC-Q101 qualification

Compliance Parameters:

RoHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)
REACH unaffected status

The substitute part TPSMC22AHE3_B/I meets all specified electrical, mechanical, and compliance requirements within the allowed parameter ranges for this product category.

Parameter Comparison

Parameter	TPSMC22HE3_A/I (Main Part)	TPSMC22AHE3_B/I (Substitute)	Compatibility
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Same
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Same
Type	Zener	Zener	Same
Unidirectional Channels	1	1	Same
Voltage - Reverse Standoff (Typ)	17.8V	18.8V	Within tolerance
Voltage - Breakdown (Min)	19.8V	20.9V	Within tolerance
Voltage - Clamping (Max) @ Ipp	31.9V	30.6V	Within tolerance
Current - Peak Pulse (10/1000µs)	47A	49A	Exceeds requirement
Power - Peak Pulse	1500W	1500W	Same
Operating Temperature	-65°C ~ 185°C (TJ)	-65°C ~ 185°C (TJ)	Same
Grade	Automotive	Automotive	Same
Qualification	AEC-Q101	AEC-Q101	Same
Mounting Type	Surface Mount	Surface Mount	Same
Package / Case	DO-214AB (SMC)	DO-214AB (SMC)	Same
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Same
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Same
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Same
REACH Status	REACH Unaffected	REACH Unaffected	Same
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The TPSMC22AHE3_B/I is a direct substitute for the obsolete TPSMC22HE3_A/I based on the following engineering criteria:

Electrical Compatibility: The substitute part operates within the specified voltage and current parameters. The reverse standoff voltage increases from 17.8V to 18.8V, the breakdown voltage increases from 19.8V to 20.9V, and the clamping voltage decreases from 31.9V to 30.6V. These variations remain within acceptable tolerances for TVS diode substitution in automotive applications. Peak pulse current capability increases from 47A to 49A, providing additional margin.

Mechanical Compatibility: Both parts utilize identical DO-214AB (SMC) surface mount packaging and are supplied in Tape & Reel format. No PCB layout modifications or reflow process adjustments are required.

Compliance & Certification: The substitute part maintains automotive-grade classification and AEC-Q101 qualification, identical to the main part. RoHS3 compliance, MSL 1 rating, and REACH unaffected status are preserved.

Product Status: The TPSMC22AHE3_B/I is classified as active, ensuring ongoing availability and supply chain support compared to the obsolete status of the main part.

Frequently Asked Questions (FAQ)

Q: Can TPSMC22AHE3_B/I be used as a direct replacement for TPSMC22HE3_A/I without circuit modifications?

A: Yes. Both parts share identical package geometry (DO-214AB), mounting type (surface mount), and electrical performance within specified tolerances. No circuit modifications are required.

Q: What are the voltage differences between the main part and substitute?

A: The reverse standoff voltage increases by 1.0V (17.8V to 18.8V), breakdown voltage increases by 1.1V (19.8V to 20.9V), and clamping voltage decreases by 1.3V (31.9V to 30.6V). These variations are within acceptable TVS diode substitution tolerances.

Q: Does the substitute part meet automotive qualification requirements?

A: Yes. The TPSMC22AHE3_B/I maintains automotive-grade classification and AEC-Q101 qualification, identical to the main part.

Q: Are there any differences in packaging or handling?

A: No. Both parts are supplied in DO-214AB (SMC) surface mount package format with Tape & Reel packaging. Moisture Sensitivity Level remains 1 (Unlimited) for both parts.

Q: Why is the main part obsolete while the substitute is active?

A: The TPSMC22HE3_A/I has been discontinued by the manufacturer. The TPSMC22AHE3_B/I represents the active equivalent within Vishay's current product portfolio, ensuring continued supply chain availability.

Q: What is the peak pulse current difference?

A: The substitute part provides 49A peak pulse current compared to 47A for the main part, representing a 2A increase in current handling capability.

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