P6SMB56AHM3_A/H Equivalent & Substitute Parts

Part Overview

The P6SMB56AHM3_A/H is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for telecom applications requiring transient voltage protection in surface mount configurations. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

P6SMB56AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 933P6SMB56AHM3_A/H Datasheet

Current PartRFQ

P6SMB56AHM3_B/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 970P6SMB56AHM3_B/H Datasheet

MFR RecommendedRFQ

SMBJE48AH

Eaton - Electronics DivisionIn Stock: 3746SMBJE48AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB56AHM3_A/H is determined by the following critical parameters:

• Voltage Rating Compatibility: Reverse standoff voltage within 47.8V ± tolerance, breakdown voltage minimum 53.2V, and clamping voltage maximum 77V
• Current Handling: Peak pulse current of 7.8A at 10/1000µs pulse width
• Power Dissipation: 600W peak pulse power rating
• Package Compatibility: DO-214AA or equivalent SMB surface mount package
• Thermal Range: Operating temperature range of -65°C to 150°C (or compatible subset)
• Compliance: AEC-Q101 automotive qualification and ROHS3 compliance

Substitute parts must maintain these electrical and mechanical specifications to ensure functional equivalence in telecom protection circuits.

Parameter Comparison

Engineering Selection Recommendations

P6SMB56AHM3_B/H is the primary substitute for the obsolete P6SMB56AHM3_A/H. Both parts are from the same manufacturer (Vishay General Semiconductor - Diodes Division), share identical electrical specifications, and maintain the same automotive grade and AEC-Q101 qualification. The P6SMB56AHM3_B/H is currently in active production status with higher inventory availability (940 pcs vs. 827 pcs), making it the preferred choice for design continuity and supply chain stability.

SMBJE48AH from Eaton - Electronics Division is an alternative substitute that meets all critical electrical parameters. The reverse standoff voltage is 48V (compared to 47.8V), breakdown voltage is 53.3V (compared to 53.2V), and clamping voltage is 77.4V (compared to 77V). The operating temperature range is -55°C to 150°C, which is narrower at the lower end compared to the original -65°C specification. SMBJE48AH maintains automotive grade and AEC-Q101 qualification, with significantly higher inventory availability (3720 pcs). This part is suitable for applications where the -55°C minimum temperature is acceptable.

Both substitutes are ROHS3 compliant and maintain the DO-214AA SMB surface mount package, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can P6SMB56AHM3_B/H be used as a direct replacement for P6SMB56AHM3_A/H?

A: Yes. Both parts share identical electrical specifications (47.8V reverse standoff, 53.2V breakdown minimum, 77V clamping maximum, 7.8A peak pulse current, 600W power rating), the same DO-214AA SMB package, identical operating temperature range (-65°C to 150°C), and equivalent automotive grade with AEC-Q101 qualification. The primary difference is product status: P6SMB56AHM3_B/H is active production while P6SMB56AHM3_A/H is obsolete.

Q: What are the differences between SMBJE48AH and the original P6SMB56AHM3_A/H?

A: SMBJE48AH is manufactured by Eaton rather than Vishay, and has a slightly higher reverse standoff voltage (48V vs. 47.8V), marginally higher breakdown voltage (53.3V vs. 53.2V), and marginally higher clamping voltage (77.4V vs. 77V). The operating temperature minimum is -55°C instead of -65°C. All other parameters—peak pulse current (7.8A), power rating (600W), package (DO-214AA SMB), automotive grade, and AEC-Q101 qualification—are equivalent.

Q: Are there any package compatibility concerns with these substitutes?

A: No. All three parts use the DO-214AA SMB surface mount package. Direct PCB footprint compatibility is maintained without layout or assembly modifications.

Q: Which substitute should be selected for new designs?

A: For new designs requiring the full -65°C to 150°C temperature range, P6SMB56AHM3_B/H is recommended due to identical specifications and active production status. If the application temperature range is -55°C to 150°C, SMBJE48AH is acceptable and offers higher inventory availability.

Q: Do these substitutes maintain automotive compliance?

A: Yes. Both P6SMB56AHM3_B/H and SMBJE48AH are automotive grade components with AEC-Q101 qualification, matching the original part's compliance requirements.