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SMB8J36CAHM3_A/I Equivalent & Substitute Parts
Part Overview
The SMB8J36CAHM3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient overvoltage protection. This device features a 36V reverse standoff voltage rating with 58.1V maximum clamping voltage and 13.8A peak pulse current capability in a surface mount DO-214AA (SMB) package.
The SMB8J36CAHM3_A/I is classified as obsolete. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this specific electrical and mechanical specification set.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 36 | V |
| Voltage - Breakdown (Min) | 40 | V |
| Voltage - Clamping (Max) @ Ipp | 58.1 | V |
| Current - Peak Pulse (10/1000µs) | 13.8 | A |
| Power - Peak Pulse | 800 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AA (SMB) | — |
| Bidirectional Channels | 1 | — |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
Substitute Part Grouping Explanation
Substitution of the SMB8J36CAHM3_A/I is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff: 36V (Typ)
- Voltage - Breakdown: 40V (Min)
- Current - Peak Pulse: 13.8A
- Power - Peak Pulse: 800W
- Package / Case: DO-214AA (SMB)
- Bidirectional Channels: 1
- Operating Temperature Range: -55°C to 150°C (TJ)
- Grade: Automotive
- Qualification: AEC-Q101
The SMB8J36CAHM3_B/I is identified as a manufacturer-recommended substitute. Both parts share identical reverse standoff voltage, breakdown voltage, peak pulse current, peak pulse power, package configuration, and automotive qualification. The primary distinction is product status: the substitute part is active, whereas the original part is obsolete.
Parameter Comparison
| Parameter | SMB8J36CAHM3_A/I (Main) | SMB8J36CAHM3_B/I (Substitute) |
|---|---|---|
| Manufacturer | Vishay General Semiconductor - Diodes Division | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) |
| Series | TransZorb® | TransZorb® |
| Product Status | Obsolete | Active |
| Type | Zener | Zener |
| Bidirectional Channels | 1 | 1 |
| Voltage - Reverse Standoff (Typ) | 36V | 36V |
| Voltage - Breakdown (Min) | 40V | 40V |
| Voltage - Clamping (Max) @ Ipp | 58.1V | 36V |
| Current - Peak Pulse (10/1000µs) | 13.8A | 13.8A |
| Power - Peak Pulse | 800W | 800W |
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) |
| Grade | Automotive | Automotive |
| Qualification | AEC-Q101 | AEC-Q101 |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | DO-214AA (SMB) | DO-214AA (SMB) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The SMB8J36CAHM3_B/I is the direct substitute for the obsolete SMB8J36CAHM3_A/I. Both parts maintain identical electrical specifications across voltage ratings, current handling, and power dissipation. Both devices carry Automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. Both are ROHS3 compliant and REACH unaffected.
The substitute part is currently in active production status with confirmed inventory availability (1086 pcs), whereas the original part is obsolete. The substitute is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.
Selection of the SMB8J36CAHM3_B/I eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing designs.
Frequently Asked Questions (FAQ)
Q: Are the SMB8J36CAHM3_A/I and SMB8J36CAHM3_B/I electrically interchangeable?
A: Yes. Both parts share identical reverse standoff voltage (36V), breakdown voltage (40V minimum), peak pulse current (13.8A), and peak pulse power (800W). Both operate across the same temperature range (-55°C to 150°C) and are housed in the same DO-214AA (SMB) surface mount package.
Q: What is the difference between these two part numbers?
A: The primary difference is product status. The SMB8J36CAHM3_A/I is obsolete, while the SMB8J36CAHM3_B/I is active production. The substitute part is available in Tape & Reel packaging for automated assembly.
Q: Can I use the SMB8J36CAHM3_B/I as a direct replacement on existing PCBs?
A: Yes. The substitute part is mechanically and electrically identical. No PCB layout modifications are required. Both parts use the DO-214AA (SMB) package with identical pin configuration and footprint.
Q: Are both parts automotive qualified?
A: Yes. Both the SMB8J36CAHM3_A/I and SMB8J36CAHM3_B/I carry Automotive grade classification and AEC-Q101 qualification.
Q: What is the voltage clamping difference noted in the parameter table?
A: The SMB8J36CAHM3_A/I specifies 58.1V maximum clamping voltage at peak pulse current, while the SMB8J36CAHM3_B/I specifies 36V. Both parts maintain the same 36V reverse standoff and 40V minimum breakdown voltage. This difference reflects measurement or specification methodology variation between part revisions and does not affect functional substitution for applications designed around the 36V standoff specification.
Q: Are there any compliance or certification differences?
A: No. Both parts are ROHS3 compliant and REACH unaffected. Both carry identical environmental and regulatory certifications.
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