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SMBJ33CA-M3/5B Transient Voltage Suppressor (TVS) Diode – Equivalent & Substitute Parts
Part Overview
The SMBJ33CA-M3/5B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage protection applications. The part is Active status and RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters to ensure direct circuit board replacement capability.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 33 | V |
| Voltage - Breakdown (Min) | 36.7 | V |
| Voltage - Clamping (Max) @ Ipp | 53.3 | V |
| Current - Peak Pulse (10/1000µs) | 11.3 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| MSL Rating | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ33CA-M3/5B are qualified based on the following critical parameters:
- Voltage - Reverse Standoff (Typ): 33V (exact match required)
- Voltage - Clamping (Max) @ Ipp: 53.3V or 52.5V (within acceptable tolerance range)
- Current - Peak Pulse (10/1000µs): 11.3A or 11.5A (within acceptable tolerance range)
- Power - Peak Pulse: 600W (exact match)
- Package / Case: DO-214AA or SMB (mechanically and electrically equivalent)
- Mounting Type: Surface Mount (required for PCB compatibility)
- Type: Zener (functional equivalence)
- Bidirectional Channels: 1 (functional requirement)
- RoHS Status: ROHS3 Compliant (regulatory requirement)
- MSL Rating: 1 (Unlimited) (handling and storage compatibility)
Substitutes are grouped into two categories: direct electrical equivalents with identical clamping voltage (53.3V) and near-equivalent parts with marginally different clamping voltage (52.5V) that remain functionally compatible within the application tolerance window.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | RoHS Status | MSL Rating |
|---|---|---|---|---|---|---|---|---|---|---|
| SMBJ33CA-M3/5B | Vishay General Semiconductor - Diodes Division | 33V | 36.7V | 53.3V | 11.3A | 600W | -55 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CA-E3/52 | Vishay General Semiconductor - Diodes Division | 33V | 36.7V | 53.3V | 11.3A | 600W | -55 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CD-M3/I | Vishay General Semiconductor - Diodes Division | 33V | 37.3V | 52.5V | 11.5A | 600W | -55 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CA-E3/5B | Vishay General Semiconductor - Diodes Division | 33V | 36.7V | 53.3V | 11.3A | 600W | -55 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| 1SMB33CA TR13 PBFREE | Central Semiconductor Corp | 33V | 36.7V | 53.3V | 11.3A | 600W | -65 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CA | MDD | 33V | 36.7V | 53.3V | 11.3A | 600W | -50 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CA-13-F | Diodes Incorporated | 33V | 36.7V | 53.3V | 11.3A | 600W | -55 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CA-TP | Micro Commercial Co | 33V | 36.7V | 53.3V | 11.3A | 600W | -55 to 175°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
| SMBJ33CAE3/TR13 | Microchip Technology | 33V | 36.7V | 53.3V | 11.3A | 600W | -65 to 150°C | DO-214AA, SMB | ROHS3 Compliant | 1 (Unlimited) |
Engineering Selection Recommendations
All listed substitute parts maintain Active product status and RoHS3 compliance, ensuring regulatory alignment with the original SMBJ33CA-M3/5B. Selection among substitutes should be based on packaging availability and operating temperature requirements:
Direct Electrical Equivalents (53.3V Clamping): SMBJ33CA-E3/52, SMBJ33CA-E3/5B, 1SMB33CA TR13 PBFREE, SMBJ33CA, SMBJ33CA-13-F, SMBJ33CA-TP, and SMBJ33CAE3/TR13 provide identical electrical performance with 33V reverse standoff, 53.3V clamping voltage, and 11.3A peak pulse current.
Near-Equivalent Alternative (52.5V Clamping): SMBJ33CD-M3/I offers marginally reduced clamping voltage (52.5V) with slightly elevated peak pulse current (11.5A), remaining within functional tolerance for applications where the 0.8V clamping voltage differential is acceptable.
Temperature Considerations: SMBJ33CA-TP supports extended upper operating temperature to 175°C. SMBJ33CAE3/TR13 and 1SMB33CA TR13 PBFREE extend lower operating temperature to -65°C. MDD SMBJ33CA operates to -50°C minimum, which is 5°C above the original part specification.
All parts are packaged in DO-214AA (SMB) surface-mount format with MSL 1 (Unlimited) rating, ensuring direct PCB compatibility and identical soldering requirements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ33CD-M3/I be used as a direct replacement for SMBJ33CA-M3/5B?
A: SMBJ33CD-M3/I is functionally compatible with a 0.8V lower clamping voltage (52.5V vs. 53.3V) and 0.2A higher peak pulse current (11.5A vs. 11.3A). This part qualifies as a near-equivalent substitute where the application tolerance permits the reduced clamping voltage margin.
Q: Are all substitute parts available in the same packaging?
A: All substitute parts use DO-214AA (SMB) surface-mount packaging, ensuring mechanical and electrical compatibility with the original SMBJ33CA-M3/5B footprint. Packaging designations (Tape & Reel, Cut Tape & Digi-Reel®) refer to supply format only and do not affect component performance or PCB mounting.
Q: What is the difference between Vishay SMBJ33CA-E3/52 and SMBJ33CA-E3/5B?
A: Both parts are electrically identical with 33V reverse standoff, 53.3V clamping voltage, and 11.3A peak pulse current. The suffix designations (E3/52 vs. E3/5B) indicate different packaging or supply configurations from Vishay but do not reflect functional differences.
Q: Which substitute offers the widest operating temperature range?
A: SMBJ33CA-TP (Micro Commercial Co) supports -55°C to 175°C, providing the highest upper temperature limit. SMBJ33CAE3/TR13 and 1SMB33CA TR13 PBFREE extend the lower limit to -65°C. The original SMBJ33CA-M3/5B operates -55°C to 150°C.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 Compliant certification with MSL 1 (Unlimited) moisture sensitivity rating, matching the regulatory and handling requirements of the original part.
Q: Can I mix different manufacturers' parts in the same circuit board assembly?
A: Yes. All substitute parts meet identical electrical specifications for the 33V TVS diode function and are qualified for general-purpose transient voltage protection. Mixing manufacturers is permissible from an electrical standpoint; however, procurement and supply chain practices should be evaluated separately.
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