P6SMB51CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The P6SMB51CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component is designed for telecom applications requiring transient overvoltage protection. The device features a 43.6V reverse standoff voltage with 70.1V maximum clamping voltage and 8.6A peak pulse current capability in a DO-214AA (SMB) package.

The P6SMB51CAHM3_A/I is classified as obsolete. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications currently using this component.

Substiute Parts

P6SMB51CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 815P6SMB51CAHM3_A/I Datasheet

Current PartRFQ

P6SMB51CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 751P6SMB51CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB51CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage ratings: Reverse standoff voltage (43.6V), breakdown voltage (48.5V minimum), and clamping voltage (70.1V maximum)
• Current handling: Peak pulse current of 8.6A at 10/1000µs pulse width
• Power dissipation: 600W peak pulse power
• Package: DO-214AA (SMB) surface mount form factor
• Electrical configuration: Bidirectional, single channel
• Temperature range: -65°C to 150°C junction temperature
• Compliance: AEC-Q101 automotive qualification and ROHS3 compliance

The P6SMB51CAHM3_B/I meets all these criteria and is the manufacturer-recommended substitute. The primary distinction is product status: the original part is obsolete while the substitute remains active in production.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB51CAHM3_B/I is the direct substitute for the obsolete P6SMB51CAHM3_A/I. Both components are manufactured by Vishay and share identical electrical specifications, thermal ratings, and compliance certifications. The substitute maintains AEC-Q101 automotive qualification and ROHS3 compliance, ensuring compatibility with existing design requirements.

The transition from the obsolete part to the active substitute presents no electrical or thermal performance trade-offs. The substitute is available in Tape & Reel packaging, which is standard for production environments. Component selection should prioritize the active part number to ensure long-term supply chain availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB51CAHM3_B/I be used as a direct replacement for the P6SMB51CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical. All voltage ratings, current specifications, temperature ranges, and package dimensions are equivalent. The substitute is the manufacturer-recommended replacement for the obsolete part.

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

A: No. Both the original and substitute parts carry AEC-Q101 automotive qualification and ROHS3 compliance. Regulatory and quality standards are maintained across the substitution.

Q: What is the difference between the packaging options?

A: The P6SMB51CAHM3_A/I was supplied in bulk packaging, while the P6SMB51CAHM3_B/I is supplied in Tape & Reel (TR) format. Tape & Reel is the standard packaging for automated assembly processes and does not affect component performance or compatibility.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate across the same temperature range (-65°C to 150°C junction temperature) and deliver identical electrical performance: 43.6V reverse standoff voltage, 70.1V clamping voltage, 8.6A peak pulse current, and 600W peak pulse power.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The DO-214AA (SMB) package footprint is identical for both parts. No PCB layout modifications are required for the substitution.