TPSMC33HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC33HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AB (SMCJ) package and is designed for transient voltage protection applications. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity. Substitute parts must maintain compatibility across electrical performance parameters, mechanical packaging, and automotive-grade qualification standards.

Substiute Parts

TPSMC33HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1220TPSMC33HE3_A/I Datasheet

Current PartRFQ

TPSMC33AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 975TPSMC33AHE3_B/I Datasheet

DirectRFQ

SMCJ33A

MDDIn Stock: 92350SMCJ33A Datasheet

MFR RecommendedRFQ

SMCJ33A

MDDIn Stock: 92350SMCJ33A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMC33HE3_A/I are evaluated based on the following critical parameters that determine functional equivalence:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 26.8V nominal operating point
• Voltage - Clamping (Max) @ Ipp: 47.7V maximum clamp voltage
• Current - Peak Pulse (10/1000µs): 31.4A peak pulse current capability
• Power - Peak Pulse: 1500W dissipation rating

Mechanical & Environmental Criteria:

• Package / Case: DO-214AB, SMC surface mount form factor
• Operating Temperature Range: -65°C to 185°C (TJ)
• Mounting Type: Surface Mount

Compliance & Quality Criteria:

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain electrical performance within the specified parameter ranges and preserve automotive-grade qualification and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

TPSMC33AHE3_B/I (Preferred Substitute): This part is the direct manufacturer equivalent from Vishay General Semiconductor - Diodes Division. It maintains active product status, preserves automotive-grade classification, and carries AEC-Q101 qualification identical to the original part. The electrical parameters remain within acceptable tolerance ranges: reverse standoff voltage increases to 28.2V, clamping voltage decreases to 45.7V, and peak pulse current increases to 32.8A. Operating temperature range remains -65°C to 185°C (TJ). This substitute is recommended as the primary replacement for the obsolete TPSMC33HE3_A/I.

SMCJ33A (Alternative Substitute): This part is manufactured by MDD and shares the DO-214AB/SMC package form factor with identical 1500W peak pulse power rating. However, it exhibits significant electrical parameter deviations: reverse standoff voltage is 33V, clamping voltage is 53.3V, and peak pulse current is 28.2A. The operating temperature range is reduced to -50°C to 150°C (TJ). Critically, this part is classified as general purpose grade without specified AEC-Q101 automotive qualification. Selection of this substitute requires verification that the application does not mandate automotive-grade certification and that the modified electrical parameters are acceptable for the intended circuit protection function.

Frequently Asked Questions (FAQ)

Q: Can TPSMC33AHE3_B/I be used as a direct replacement for TPSMC33HE3_A/I?

A: Yes. Both parts are manufactured by Vishay General Semiconductor - Diodes Division, share identical automotive-grade classification and AEC-Q101 qualification, operate across the same temperature range (-65°C to 185°C TJ), and are packaged in DO-214AB/SMC. Electrical parameters remain within functional tolerance: reverse standoff voltage increases from 26.8V to 28.2V, clamping voltage decreases from 47.7V to 45.7V, and peak pulse current increases from 31.4A to 32.8A. This part is the recommended substitute.

Q: Is SMCJ33A suitable for automotive applications?

A: SMCJ33A is classified as general purpose grade without specified AEC-Q101 automotive qualification. If your application requires automotive-grade components and AEC-Q101 certification, SMCJ33A is not suitable. If automotive qualification is not mandated, compatibility depends on whether the modified electrical parameters (33V reverse standoff, 53.3V clamping voltage, 28.2A peak pulse current) and reduced operating temperature range (-50°C to 150°C TJ) meet circuit protection requirements.

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

A: TPSMC33AHE3_B/I maintains the closest electrical alignment with minor parameter shifts within acceptable ranges. SMCJ33A exhibits larger deviations: reverse standoff voltage increases by 6.2V, clamping voltage increases by 5.6V, and peak pulse current decreases by 3.2A. These differences may affect transient suppression characteristics and require circuit-level validation.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the DO-214AB/SMC surface mount package, ensuring mechanical and footprint compatibility. No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to each part?

A: TPSMC33HE3_A/I and TPSMC33AHE3_B/I both carry AEC-Q101 automotive qualification and ROHS3 compliance. SMCJ33A carries ROHS3 compliance but does not specify AEC-Q101 automotive qualification. All three parts are REACH unaffected and classified under ECCN EAR99.