PTVS3-076C-M Equivalent & Substitute Parts

Part Overview

The PTVS3-076C-M is a 76V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose transient protection applications. This bidirectional Zener TVS diode features a 135V maximum clamping voltage and 3000A peak pulse current capability in a 2-SMD surface mount package. The part is currently Active in product status and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when they maintain critical electrical parameters—specifically reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current—within acceptable operational ranges for the same application class, while accommodating variations in package configuration and thermal performance.

Substiute Parts

PTVS3-076C-M

Bourns Inc.In Stock: 681PTVS3-076C-M Datasheet

Current PartRFQ

SMTJ76CAT

Eaton - Electronics DivisionIn Stock: 3981SMTJ76CAT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTVS3-076C-M is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must match at 76V (Typ) to ensure identical trigger characteristics
• Voltage - Breakdown (Min): Must match at 85V minimum to maintain consistent activation threshold
• Voltage - Clamping (Max) @ Ipp: Acceptable range is 135V to 150V; higher clamping voltage provides equivalent or superior transient suppression
• Current - Peak Pulse (8/20µs): Must be ≥3000A; higher pulse current capability indicates enhanced surge handling capacity
• Bidirectional Channels: Must equal 1 (single channel configuration)
• Type: Must be Zener TVS diode
• Mounting Type: Surface Mount required for PCB integration compatibility

The SMTJ76CAT meets all substitution criteria with matching standoff and breakdown voltages, superior clamping voltage (150V vs. 135V), and higher peak pulse current (3500A vs. 3000A). Package configuration differs (4-SMD J-Lead vs. 2-SMD Flat Lead), requiring PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

PTVS3-076C-M (Primary Selection)

Use the original PTVS3-076C-M when the 2-SMD flat lead package is specified in PCB design and layout is finalized. This part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Inventory availability is confirmed at 658 units.

SMTJ76CAT (Substitute Selection)

The SMTJ76CAT is a valid substitute when:

• PCB layout can accommodate the 4-SMD J-Lead package configuration
• Extended operating temperature range (-55 to 150°C vs. -55 to 125°C) provides design margin
• Higher clamping voltage (150V) and peak pulse current (3500A) meet or exceed application requirements
• RoHS compliance is required (RoHS Compliant status confirmed)

Both parts maintain identical reverse standoff and breakdown voltages, ensuring equivalent circuit activation characteristics. The SMTJ76CAT offers superior transient suppression capability with higher peak pulse current and clamping voltage. Inventory availability for SMTJ76CAT is confirmed at 3953 units.

Frequently Asked Questions (FAQ)

Q: Can SMTJ76CAT replace PTVS3-076C-M in existing designs?

A: Electrical substitution is valid when reverse standoff voltage (76V), breakdown voltage (85V), and bidirectional single-channel configuration are maintained. Physical substitution requires PCB layout modification to accommodate the 4-SMD J-Lead package versus the original 2-SMD flat lead configuration. Footprint redesign and revalidation are necessary.

Q: What is the significance of the higher clamping voltage in SMTJ76CAT?

A: The SMTJ76CAT clamping voltage of 150V (versus 135V in PTVS3-076C-M) indicates superior transient suppression performance. At the same peak pulse current, the substitute part limits voltage rise to a higher level, which is acceptable for applications tolerating this margin. This represents an enhancement rather than a limitation.

Q: Are there package compatibility concerns?

A: Yes. PTVS3-076C-M uses a 2-SMD flat lead package, while SMTJ76CAT uses a 4-SMD J-Lead package. These are physically distinct and require different PCB footprints. Direct board-level substitution without layout modification is not possible. Footprint verification and revalidation are mandatory before implementation.

Q: Do both parts meet compliance requirements?

A: Both parts are RoHS compliant and maintain MSL 1 (unlimited) moisture sensitivity rating. PTVS3-076C-M carries RoHS3 compliance, while SMTJ76CAT carries RoHS compliance. Both are suitable for regulated applications. REACH status differs (PTVS3-076C-M is REACH Affected; SMTJ76CAT is REACH Unaffected), which may impact supply chain documentation requirements.

Q: What is the operational temperature difference?

A: PTVS3-076C-M operates from -55 to 125°C, while SMTJ76CAT operates from -55 to 150°C. The extended upper temperature limit in SMTJ76CAT provides additional thermal margin for high-temperature applications but does not affect substitution validity for standard operating ranges.