TPSMP33HM3/85A Equivalent & Substitute Parts

Part Overview

The TPSMP33HM3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in surface mount applications, featuring a 26.8V reverse standoff voltage and 47.7V maximum clamping voltage. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

TPSMP33HM3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1049TPSMP33HM3/85A Datasheet

Current PartRFQ

TPSMP33AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1012TPSMP33AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMP33HM3/85A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional channel configuration (1 channel required)
• Reverse standoff voltage range: 26.8V nominal
• Breakdown voltage minimum: ≥29.7V
• Clamping voltage maximum: ≤47.7V @ Ipp
• Peak pulse current capability: ≥8.4A (10/1000µs)
• Peak pulse power rating: ≥400W
• Operating temperature range: -65°C ~ 185°C (TJ)

Mechanical & Compliance Criteria:

• Package type: DO-220AA (SMP) surface mount
• Automotive grade qualification: AEC-Q101
• RoHS3 compliance
• Moisture sensitivity level: MSL 1

The substitute part TPSMP33AHM3_A/I meets all specified electrical and mechanical requirements while maintaining active product status and full automotive qualification.

Parameter Comparison

Engineering Selection Recommendations

The TPSMP33AHM3_A/I is a direct substitute for the obsolete TPSMP33HM3/85A. Both components share identical base product designation (TPSMP33), package type (DO-220AA SMP), and automotive qualification (AEC-Q101). The substitute maintains full compliance with ROHS3 and MSL 1 requirements.

The substitute part exhibits slightly higher reverse standoff voltage (28.2V vs. 26.8V) and breakdown voltage (31.4V vs. 29.7V), with correspondingly lower clamping voltage (45.7V vs. 47.7V). These parameter variations remain within acceptable substitution tolerances for TVS diode applications. The substitute also provides marginally higher peak pulse current capability (8.8A vs. 8.4A) while maintaining identical 400W peak pulse power rating and operating temperature range.

The primary advantage of the TPSMP33AHM3_A/I is active product status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can TPSMP33AHM3_A/I directly replace TPSMP33HM3/85A in existing designs?

A: Yes. Both parts share identical package type (DO-220AA SMP), mounting configuration (surface mount), and automotive qualification (AEC-Q101). Electrical parameter variations fall within acceptable substitution ranges for TVS diode applications.

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

A: The substitute exhibits 1.4V higher reverse standoff voltage and 1.7V higher breakdown voltage, with 2.0V lower clamping voltage. Peak pulse current is 0.4A higher. These differences are characteristic of the same product family and do not preclude direct substitution.

Q: Are both parts automotive qualified?

A: Yes. Both TPSMP33HM3/85A and TPSMP33AHM3_A/I carry AEC-Q101 qualification and automotive grade designation, meeting automotive reliability and qualification standards.

Q: What is the packaging difference between these parts?

A: TPSMP33HM3/85A is supplied in bulk packaging, while TPSMP33AHM3_A/I is supplied in Tape & Reel (TR) format. Both use identical DO-220AA (SMP) component packaging.

Q: Are both parts RoHS3 compliant?

A: Yes. Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, meeting environmental and regulatory requirements.

Q: Why is the original part listed as obsolete?

A: TPSMP33HM3/85A is classified as obsolete by the manufacturer. The TPSMP33AHM3_A/I represents the active product continuation within the same TPSMP33 family, ensuring ongoing availability and support.