SMP33A-M3/85A Equivalent & Substitute Parts

Part Overview

The SMP33A-M3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® and eSMP® series. This surface mount component is designed for general-purpose transient voltage suppression applications. The part is currently active in production with 1,081 pieces available in new original stock. Alternative equivalent parts may be required due to inventory availability, supply chain considerations, or specific procurement requirements.

Substiute Parts

SMP33A-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1124SMP33A-M3/85A Datasheet

Current PartRFQ

SMP33A-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 10458SMP33A-M3/84A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMP33A-M3/85A is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Voltage - Clamping (Max) @ Ipp: 53.3V
• Current - Peak Pulse (10/1000µs): 7.5A
• Power - Peak Pulse: 400W
• Package / Case: DO-220AA (SMP)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C (TJ)

The substitute part SMP33A-M3/84A meets all these criteria and is therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Engineering Selection Recommendations

Both SMP33A-M3/85A and SMP33A-M3/84A are active production parts from Vishay General Semiconductor - Diodes Division. Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture handling requirements during storage or assembly. Selection between these parts may be based on inventory availability, with SMP33A-M3/84A currently showing higher stock levels (10,400 pieces) compared to SMP33A-M3/85A (1,081 pieces). From a compliance and certification perspective, both parts are equivalent and suitable for direct substitution in applications requiring 33V reverse standoff TVS diodes with 7.5A peak pulse current capability in DO-220AA surface mount packaging.

Frequently Asked Questions (FAQ)

Q: Can SMP33A-M3/84A be used as a direct replacement for SMP33A-M3/85A?

A: Yes. Both parts are identical in all critical electrical parameters (voltage ratings, current ratings, power dissipation) and mechanical specifications (package type, mounting method, operating temperature range). They are direct functional equivalents.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts carry identical RoHS3 compliance status and MSL 1 moisture sensitivity rating. Both are active production parts from the same manufacturer.

Q: What determines whether a part can substitute for the SMP33A-M3/85A?

A: Substitution is determined by matching all critical parameters: 33V reverse standoff voltage, 36.7V minimum breakdown voltage, 53.3V maximum clamping voltage, 7.5A peak pulse current, 400W peak pulse power, DO-220AA package type, surface mount mounting, and -55°C to 150°C operating temperature range.

Q: Are there any package or footprint differences between these parts?

A: No. Both parts use the DO-220AA (SMP) surface mount package with identical footprint and mounting requirements.

Q: What is the difference between the part numbers SMP33A-M3/85A and SMP33A-M3/84A?

A: The suffix designations (/85A and /84A) represent different tape and reel configurations or manufacturing date codes from Vishay. The electrical and mechanical specifications are identical.