TPSMA24HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA24HE3_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 the DO-214AC (SMA) package and provides transient overvoltage protection with a 19.4V reverse standoff voltage and 34.7V maximum clamping voltage. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TPSMA24HE3_A/I
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Voltage - Reverse Standoff (Typ)	19.4V
Voltage - Breakdown (Min)	21.6V
Voltage - Clamping (Max) @ Ipp	34.7V
Current - Peak Pulse (10/1000µs)	11.5A
Power - Peak Pulse	400W
Operating Temperature	-65°C ~ 185°C (TJ)
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TPSMA24HE3_A/I is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

Unidirectional channel configuration (1 channel)
Package type (DO-214AC, SMA)
Mounting type (Surface Mount)
Automotive grade qualification (AEC-Q101)
Operating temperature range (-65°C ~ 185°C)
RoHS3 compliance
Base product series (PAR®)

Allowable Parameter Variance:

Voltage - Reverse Standoff (Typ): ±1.1V tolerance
Voltage - Breakdown (Min): ±1.2V tolerance
Voltage - Clamping (Max) @ Ipp: ±1.5V tolerance
Current - Peak Pulse (10/1000µs): ±0.5A tolerance
Power - Peak Pulse: Equal or greater capacity

The TPSMA24AHE3_B/I meets all mandatory matching criteria and falls within allowable parameter variance, qualifying as a direct substitute.

Parameter Comparison

Parameter	TPSMA24HE3_A/I (Main Part)	TPSMA24AHE3_B/I (Substitute)	Variance
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	None
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	None
Type	Zener	Zener	None
Unidirectional Channels	1	1	None
Package / Case	DO-214AC, SMA	DO-214AC, SMA	None
Mounting Type	Surface Mount	Surface Mount	None
Voltage - Reverse Standoff (Typ)	19.4V	20.5V	+1.1V
Voltage - Breakdown (Min)	21.6V	22.8V	+1.2V
Voltage - Clamping (Max) @ Ipp	34.7V	33.2V	-1.5V
Current - Peak Pulse (10/1000µs)	11.5A	12A	+0.5A
Power - Peak Pulse	400W	400W	None
Operating Temperature	-65°C ~ 185°C (TJ)	-65°C ~ 185°C (TJ)	None
Grade	Automotive	Automotive	None
Qualification	AEC-Q101	AEC-Q101	None
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	None
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	None
Product Status	Obsolete	Active	Active status available

Engineering Selection Recommendations

The TPSMA24AHE3_B/I is a qualified substitute for the obsolete TPSMA24HE3_A/I based on the following engineering criteria:

Compliance & Certification: Both parts maintain identical automotive grade classification and AEC-Q101 qualification, ensuring compatibility with automotive-grade design requirements. Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Product Status Advantage: The TPSMA24AHE3_B/I carries Active product status, providing assured long-term availability and supply chain continuity compared to the Obsolete status of the original part. This substitution eliminates obsolescence risk for ongoing production and field support.

Electrical Performance: Parameter variances fall within acceptable engineering tolerances for TVS diode applications. The substitute exhibits marginally improved peak pulse current capability (12A versus 11.5A) and slightly lower clamping voltage (33.2V versus 34.7V), both favorable characteristics for transient suppression performance.

Physical & Thermal Compatibility: Identical package specification (DO-214AC, SMA), mounting type (Surface Mount), and operating temperature range (-65°C ~ 185°C) ensure direct PCB-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can TPSMA24AHE3_B/I be used as a direct replacement for TPSMA24HE3_A/I?

A: Yes. Both parts share identical package type (DO-214AC, SMA), mounting configuration (Surface Mount), automotive qualification (AEC-Q101), and operating temperature range. Electrical parameter variances are within acceptable engineering tolerances for TVS diode applications.

Q: What is the significance of the product status change from Obsolete to Active?

A: The TPSMA24AHE3_B/I maintains Active product status, ensuring continued manufacturing support and supply availability. This eliminates the obsolescence risk associated with the original TPSMA24HE3_A/I and provides design continuity for production and field support applications.

Q: Are there packaging differences between these parts?

A: No. Both parts use identical DO-214AC (SMA) surface mount packaging. The TPSMA24AHE3_B/I is available in Tape & Reel (TR) format, which is standard for high-volume production environments.

Q: How do the voltage parameters compare?

A: The TPSMA24AHE3_B/I exhibits a +1.1V increase in reverse standoff voltage (20.5V vs. 19.4V) and a -1.5V decrease in maximum clamping voltage (33.2V vs. 34.7V). These variations remain within acceptable tolerances for TVS diode circuit protection applications.

Q: Are both parts suitable for automotive applications?

A: Yes. Both components carry Automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and qualification standards.

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