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SMBJ12CA-M3/5B Equivalent & Substitute Parts
Part Overview
The SMBJ12CA-M3/5B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ12CA-M3/5B |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 12V |
| Voltage - Breakdown (Min) | 13.3V |
| Voltage - Clamping (Max) @ Ipp | 19.9V |
| Current - Peak Pulse (10/1000µs) | 30.2A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the SMBJ12CA-M3/5B are grouped based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:
Critical Parameters for Substitution:
- Voltage - Reverse Standoff (Typ): 12V
- Voltage - Clamping (Max) @ Ipp: 19.9V (±0.3V tolerance acceptable)
- Current - Peak Pulse (10/1000µs): 30.2A (±0.4A tolerance acceptable)
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Bidirectional Channels: 1
- Type: Zener
Group 1: Direct Electrical & Mechanical Equivalents Parts meeting all critical parameters with identical or compatible packaging specifications:
- SMBJ12CA-E3/52 (Vishay, Cut Tape & Digi-Reel packaging)
- SMBJ12CA-E3/5B (Vishay, Tape & Reel packaging, manufacturer recommended)
- SMBJ12CA-TP (Micro Commercial Co, Tape & Reel packaging)
- SMBJ12CAE3/TR13 (Microchip Technology, Tape & Reel packaging)
- 1SMB12CA TR13 PBFREE (Central Semiconductor Corp, Tape & Reel packaging)
- SMBJ12CA-13-F (Diodes Incorporated, Tape & Reel packaging)
Group 2: Near-Equivalent Parts (Minor Parameter Variance)
- SMBJ12CD-M3/I (Vishay): Clamping voltage 19.6V (0.3V lower), Peak pulse current 30.6A (0.4A higher)
Group 3: Related but Non-Equivalent Parts (Different Voltage Rating)
- SMBJ11CA (Fairchild Semiconductor): Reverse standoff 11V, clamping voltage 18.2V
- SMBJ10CA (MDD): Reverse standoff 10V, clamping voltage 17V
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|
| SMBJ12CA-M3/5B | Vishay | 12V | 19.9V | 30.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| SMBJ12CA-E3/52 | Vishay | 12V | 19.9V | 30.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Cut Tape & Digi-Reel |
| SMBJ12CA-E3/5B | Vishay | 12V | 19.9V | 30.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| SMBJ12CD-M3/I | Vishay | 12V | 19.6V | 30.6A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| 1SMB12CA TR13 PBFREE | Central Semiconductor Corp | 12V | 19.9V | 30.2A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| SMBJ12CA-13-F | Diodes Incorporated | 12V | 19.9V | 30.2A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| SMBJ12CA-TP | Micro Commercial Co | 12V | 19.9V | 30.2A | 600W | -55°C ~ 175°C | DO-214AA, SMB | Tape & Reel |
| SMBJ12CAE3/TR13 | Microchip Technology | 12V | 19.9V | 30.2A | 600W | -65°C ~ 150°C | DO-214AA, SMB | Tape & Reel |
| SMBJ11CA | Fairchild Semiconductor | 11V | 18.2V | 33A | 600W | -55°C ~ 150°C | DO-214AA, SMB | Bulk |
| SMBJ10CA | MDD | 10V | 17V | 35.3A | 600W | -50°C ~ 150°C | DO-214AA, SMB | Not specified |
Engineering Selection Recommendations
Primary Substitutes (Direct Equivalents): SMBJ12CA-E3/5B, SMBJ12CA-E3/52, SMBJ12CA-TP, SMBJ12CAE3/TR13, 1SMB12CA TR13 PBFREE, and SMBJ12CA-13-F are direct electrical and mechanical equivalents. All maintain identical voltage ratings, peak pulse current, and power dissipation specifications. All are Active status products with ROHS3 compliance and MSL 1 rating. Selection among these parts depends on packaging format availability and procurement lead times.
Secondary Substitute (Minor Parameter Variance): SMBJ12CD-M3/I from Vishay presents a near-equivalent option with clamping voltage of 19.6V (0.3V lower than the main part) and peak pulse current of 30.6A (0.4A higher). This part remains within acceptable tolerance ranges for most general-purpose transient suppression applications and maintains identical power rating and temperature range.
Non-Equivalent Parts: SMBJ11CA and SMBJ10CA operate at different voltage ratings (11V and 10V reverse standoff respectively) and are not suitable substitutes for 12V applications. These parts are listed for reference only and should not be selected as replacements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ12CA-E3/5B be used as a direct replacement for SMBJ12CA-M3/5B? A: Yes. Both parts are manufactured by Vishay with identical electrical specifications: 12V reverse standoff, 19.9V clamping voltage, and 30.2A peak pulse current. The difference is packaging format (both Tape & Reel) and internal product code designation. Both are Active status and ROHS3 compliant.
Q: What is the difference between SMBJ12CA-E3/52 and SMBJ12CA-M3/5B? A: Electrical specifications are identical. SMBJ12CA-E3/52 uses Cut Tape & Digi-Reel packaging while SMBJ12CA-M3/5B uses standard Tape & Reel. Both are Vishay products with the same voltage and current ratings.
Q: Is SMBJ12CD-M3/I a suitable substitute? A: SMBJ12CD-M3/I is a near-equivalent with minor parameter variance. Clamping voltage is 19.6V (0.3V lower) and peak pulse current is 30.6A (0.4A higher). For general-purpose transient suppression, this part functions within acceptable tolerance. Application-specific requirements should be evaluated.
Q: Why are SMBJ11CA and SMBJ10CA listed if they are not equivalent? A: These parts are included for reference as related TVS diodes in the same package family. However, their lower voltage ratings (11V and 10V respectively) make them unsuitable for 12V suppression applications. Do not select these as replacements.
Q: Can parts from different manufacturers be interchanged? A: Yes, provided electrical specifications match exactly. SMBJ12CA-TP (Micro Commercial Co), SMBJ12CAE3/TR13 (Microchip Technology), 1SMB12CA TR13 PBFREE (Central Semiconductor Corp), and SMBJ12CA-13-F (Diodes Incorporated) all meet the same electrical and mechanical requirements as the Vishay original. All are Active status with ROHS3 compliance.
Q: What is the significance of the packaging designation (M3/5B vs E3/52)? A: These designations indicate internal Vishay product codes and packaging format variations. M3/5B and E3/5B both use standard Tape & Reel, while E3/52 uses Cut Tape & Digi-Reel. Electrical performance is identical; selection depends on procurement and assembly process requirements.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ12CA-M3/5B specifications.
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