SMBJ48CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ48CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient protection. This component operates with a 48V reverse standoff voltage and provides 600W peak pulse power dissipation in a surface mount DO-214AA (SMB) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

SMBJ48CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 855SMBJ48CAHM3_A/I Datasheet

Current PartRFQ

SMBJ48CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1103SMBJ48CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ48CAHM3_A/I is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 48V
• Voltage - Breakdown (Min): 53.3V
• Voltage - Clamping (Max) @ Ipp: 77.4V
• Current - Peak Pulse (10/1000µs): 7.8A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The SMBJ48CAHM3_B/I is a direct equivalent substitute, maintaining identical electrical performance specifications while offering active product status and improved supply availability. Both parts belong to the same TransZorb® series and share the same base product number (SMBJ48), differing only in packaging configuration and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ48CAHM3_B/I is the direct substitute for the obsolete SMBJ48CAHM3_A/I. Both parts maintain identical electrical and thermal specifications, automotive-grade qualification, and AEC-Q101 certification. The primary distinction is product lifecycle status: the substitute part is active and maintains current manufacturing support, whereas the original part is obsolete.

For new designs and production applications, the SMBJ48CAHM3_B/I should be selected to ensure long-term supply chain continuity and manufacturer support. The Tape & Reel packaging of the substitute part is standard for high-volume production environments and provides improved handling and automated assembly compatibility compared to bulk packaging.

Both parts satisfy identical functional requirements for telecom transient voltage suppression applications and are fully interchangeable at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ48CAHM3_B/I be used as a direct replacement for the SMBJ48CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (48V reverse standoff, 77.4V clamping), current ratings (7.8A peak pulse), power dissipation (600W), package type (DO-214AA SMB), and operating temperature range (-55°C to 150°C). The substitute part is active and recommended for all new applications.

Q: What is the difference between the two part numbers?

A: The primary difference is product status and packaging configuration. The SMBJ48CAHM3_A/I is obsolete and supplied in bulk packaging, while the SMBJ48CAHM3_B/I is active and supplied in Tape & Reel format. Electrically and functionally, they are equivalent.

Q: Are both parts automotive-qualified?

A: Yes. Both the SMBJ48CAHM3_A/I and SMBJ48CAHM3_B/I carry automotive-grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Is the DO-214AA (SMB) package identical for both parts?

A: Yes. Both parts use the same DO-214AA surface mount package, ensuring identical PCB footprint, soldering requirements, and thermal characteristics. No layout or assembly modifications are required when substituting between these parts.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components in automotive and telecom applications.