TPSMA33AHE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA33AHE3_A/I is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AC (SMA) package. This component operates with a reverse standoff voltage of 28.2V and provides clamping protection at 45.7V with peak pulse current handling of 8.8A. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued circuit protection in new designs and production runs.

Substiute Parts

TPSMA33AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1170TPSMA33AHE3_A/I Datasheet

Current PartRFQ

P4SMA33A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1068P4SMA33A-E3/5A Datasheet

DirectRFQ

P4SMA33A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 3650P4SMA33A-E3/61 Datasheet

DirectRFQ

P4SMA33A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1021P4SMA33A-M3/5A Datasheet

DirectRFQ

P4SMA33A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 791P4SMA33A-M3/61 Datasheet

DirectRFQ

TPSMA33AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1159TPSMA33AHE3_B/I Datasheet

DirectRFQ

P4SMA33A

Eaton - Electronics DivisionIn Stock: 2902P4SMA33A Datasheet

MFR RecommendedRFQ

SMAJP4KE33A-TP

Micro Commercial CoIn Stock: 1173SMAJP4KE33A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMA33AHE3_A/I is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - Reverse Standoff (Typ): 28.2V
• Voltage - Breakdown (Min): 31.4V
• Voltage - Clamping (Max) @ Ipp: 45.7V
• Current - Peak Pulse (10/1000µs): 8.8A minimum
• Power - Peak Pulse: 400W
• Type: Zener, Unidirectional (1 channel)

Mechanical Equivalence Requirements:

• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts are grouped into two categories: Vishay direct equivalents (same manufacturer, active product status) and cross-manufacturer alternatives (different manufacturers, active product status). All identified substitutes maintain identical electrical protection characteristics and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

Preferred Substitutes for Automotive Applications:

TPSMA33AHE3_B/I is the direct replacement for TPSMA33AHE3_A/I. Both parts share identical electrical specifications, automotive-grade classification, AEC-Q101 qualification, and extended operating temperature range (-65°C ~ 185°C). This part maintains full compatibility with designs originally specified for the obsolete TPSMA33AHE3_A/I.

Substitutes for General-Purpose Applications:

P4SMA33A-E3/5A, P4SMA33A-E3/61, P4SMA33A-M3/5A, and P4SMA33A-M3/61 are active Vishay alternatives with identical electrical protection characteristics. These parts operate within a reduced temperature range (-65°C ~ 150°C) and lack automotive qualification. Selection among these variants depends on packaging requirements (Tape & Reel format with different reel sizes denoted by the suffix).

Cross-Manufacturer Alternatives:

P4SMA33A (Eaton) and SMAJP4KE33A-TP (Micro Commercial Co) provide electrical equivalence with peak pulse current ratings of 9A, exceeding the original 8.8A specification. Operating temperature ranges differ: Eaton operates -55°C ~ 150°C, while Micro Commercial Co operates -55°C ~ 175°C. These alternatives are suitable for applications where the original temperature range is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can P4SMA33A-E3/5A replace TPSMA33AHE3_A/I in automotive applications?

A: P4SMA33A-E3/5A provides electrical equivalence but lacks automotive-grade classification and AEC-Q101 qualification. For automotive designs, TPSMA33AHE3_B/I is the appropriate substitute. P4SMA33A-E3/5A is suitable for general-purpose applications with identical electrical protection.

Q: What is the difference between P4SMA33A-E3/5A and P4SMA33A-M3/5A?

A: Both parts are electrically identical with matching voltage and current specifications. The difference lies in packaging configuration: the E3 and M3 designations indicate different reel sizes for tape and reel packaging. Selection depends on production equipment compatibility and supply chain requirements.

Q: Why do Eaton P4SMA33A and Micro Commercial Co SMAJP4KE33A-TP show 9A peak pulse current instead of 8.8A?

A: These parts exceed the minimum current specification of 8.8A, providing enhanced transient protection margin. The 9A rating is compatible with circuits designed for 8.8A operation and represents improved performance capability.

Q: Is TPSMA33AHE3_B/I a direct drop-in replacement for TPSMA33AHE3_A/I?

A: Yes. TPSMA33AHE3_B/I is electrically and mechanically identical to TPSMA33AHE3_A/I, with the same automotive grade, AEC-Q101 qualification, extended temperature range, and DO-214AC (SMA) package. It is the recommended substitute for obsolete stock.

Q: What are the packaging differences indicated by the suffixes in Vishay part numbers?

A: The suffix designations (E3/5A, E3/61, M3/5A, M3/61) indicate tape and reel packaging configurations. The E3 and M3 refer to reel diameter and tape width specifications, while the numeric suffix (5A, 61) indicates reel quantity. All variants maintain identical electrical specifications and are interchangeable from a circuit protection standpoint.

Q: Can I use SMAJP4KE33A-TP in place of TPSMA33AHE3_A/I if operating temperature does not exceed 150°C?

A: Yes. SMAJP4KE33A-TP provides equivalent electrical protection with 9A peak pulse current capability. The extended temperature range to 175°C is not required for applications operating below 150°C, making this part functionally suitable.