TPSMA27HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA27HE3_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 21.8V reverse standoff voltage and 39.1V maximum clamping voltage. The part is classified as Obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement requirements.

Substiute Parts

TPSMA27HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1080TPSMA27HE3_A/I Datasheet

Current PartRFQ

TPSMA27AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 55235TPSMA27AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMA27HE3_A/I is determined by strict equivalence across the following critical parameters:

Mechanical Compatibility:

• Package type: DO-214AC (SMA)
• Mounting type: Surface Mount
• Physical footprint compatibility

Electrical Compatibility:

• Unidirectional channel configuration: 1 channel
• Voltage - Reverse Standoff (Typ): 21.8V nominal
• Voltage - Breakdown (Min): within acceptable tolerance range
• Voltage - Clamping (Max) @ Ipp: within acceptable tolerance range
• Current - Peak Pulse (10/1000µs): minimum 10.2A capability
• Power - Peak Pulse: 400W rating
• Operating Temperature Range: -65°C ~ 185°C (TJ)

Compliance & Certification:

• Automotive Grade qualification
• AEC-Q101 certification
• RoHS3 Compliance
• REACH Unaffected status

The substitute part TPSMA27AHE3_B/I meets all mechanical and electrical compatibility criteria while offering active product status and improved inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA27AHE3_B/I is the direct substitute for the obsolete TPSMA27HE3_A/I. Both components share identical automotive qualification (AEC-Q101), RoHS3 compliance, and REACH status. The substitute part maintains the same package footprint (DO-214AC/SMA), mounting configuration, and thermal operating range (-65°C ~ 185°C TJ).

The TPSMA27AHE3_B/I offers active product status with significantly higher inventory availability (55,200 pcs vs. 1,067 pcs), ensuring supply chain continuity. Electrical parameters remain within acceptable tolerance ranges for transient voltage suppression applications, with the substitute providing marginally higher peak pulse current capability (10.7A vs. 10.2A) and slightly lower clamping voltage (37.5V vs. 39.1V).

Frequently Asked Questions (FAQ)

Q: Can TPSMA27AHE3_B/I be used as a direct replacement for TPSMA27HE3_A/I?

A: Yes. Both parts share identical mechanical compatibility (DO-214AC/SMA package), electrical channel configuration (1 unidirectional), thermal range (-65°C ~ 185°C TJ), and automotive certifications (AEC-Q101, RoHS3, REACH Unaffected). Electrical parameters fall within acceptable tolerance ranges for TVS diode applications.

Q: What are the key electrical differences between these parts?

A: The substitute TPSMA27AHE3_B/I has a slightly higher reverse standoff voltage (23.1V vs. 21.8V), higher breakdown voltage minimum (25.7V vs. 24.3V), lower maximum clamping voltage (37.5V vs. 39.1V), and higher peak pulse current capability (10.7A vs. 10.2A). These variations remain within the functional tolerance of TVS diode design specifications.

Q: Are there packaging differences between these parts?

A: The main part uses standard packaging, while the substitute is supplied in Tape & Reel (TR) format. Both use the identical DO-214AC (SMA) package footprint and are surface mount compatible with no PCB layout modifications required.

Q: Why is the original part obsolete?

A: The TPSMA27HE3_A/I is classified as obsolete by the manufacturer. The TPSMA27AHE3_B/I represents the active equivalent within the same product family, ensuring continued availability and support for new designs and field replacements.

Q: Are both parts automotive grade?

A: Yes. Both the TPSMA27HE3_A/I and TPSMA27AHE3_B/I carry Automotive Grade classification with AEC-Q101 qualification, suitable for automotive and industrial applications requiring transient voltage suppression.