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SMBJ43-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ43-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose transient voltage suppression in surface-mount applications using the DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 43V |
| Voltage - Breakdown (Min) | 47.8V |
| Voltage - Clamping (Max) @ Ipp | 76.7V |
| Current - Peak Pulse (10/1000µs) | 7.8A |
| 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) |
Substitute Part Grouping Explanation
Substitution for the SMBJ43-E3/52 is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 43V
- Voltage - Breakdown (Min): 47.8V
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
- Type: Zener
- RoHS Status: ROHS3 Compliant
Substitute parts must maintain identical reverse standoff voltage, breakdown voltage minimum, and package specifications to ensure direct functional equivalence. All identified substitutes meet these core electrical and mechanical requirements.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Operating Temperature Range | Product Status | Packaging |
|---|---|---|---|---|---|---|
| SMBJ43-E3/52 | Vishay General Semiconductor - Diodes Division | 76.7V | 7.8A | -55°C ~ 150°C (TJ) | Obsolete | - |
| SMBJ43A-E3/52 | Vishay General Semiconductor - Diodes Division | 69.4V | 8.6A | -55°C ~ 150°C (TJ) | Active | Tape & Reel (TR) |
| SMBJ43E3/TR13 | Microchip Technology | 76.7V | 7.8A | -65°C ~ 150°C (TJ) | Active | Tape & Reel (TR) |
| SMBJ43A | Meritek | 69.4V | 8.65A | -55°C ~ 150°C | Active | - |
| SMBJ43A-13-F | Diodes Incorporated | 69.4V | 8.6A | -55°C ~ 150°C (TJ) | Active | Tape & Reel (TR) |
| SMBJ43A-HRA | Littelfuse | 69.4V | 8.7A | -65°C ~ 150°C (TJ) | Active | Tape & Reel (TR) |
| SMBJ43A-TP | Micro Commercial Co | 69.4V | 8.6A | -55°C ~ 175°C (TJ) | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
All substitute parts listed maintain the required 43V reverse standoff voltage and 47.8V minimum breakdown voltage specifications. Selection should prioritize active product status to ensure long-term availability and supply chain stability.
SMBJ43E3/TR13 (Microchip Technology) provides electrical characteristics matching the original SMBJ43-E3/52, with identical clamping voltage (76.7V) and peak pulse current (7.8A). This part extends the operating temperature range to -65°C, offering enhanced low-temperature performance.
SMBJ43A-E3/52 (Vishay General Semiconductor - Diodes Division) maintains the original manufacturer's product line with active status. The reduced clamping voltage (69.4V) and increased peak pulse current (8.6A) represent a performance optimization within the same voltage class.
SMBJ43A-13-F (Diodes Incorporated), SMBJ43A-HRA (Littelfuse), and SMBJ43A-TP (Micro Commercial Co) offer alternative sources with 69.4V clamping voltage and 8.6A to 8.7A peak pulse current ratings. SMBJ43A-TP extends the upper operating temperature to 175°C, suitable for high-temperature applications.
All substitute parts are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.
Frequently Asked Questions (FAQ)
Q: Can SMBJ43A variants directly replace SMBJ43-E3/52?
A: Yes. SMBJ43A variants maintain the required 43V reverse standoff voltage and 47.8V minimum breakdown voltage. The reduced clamping voltage (69.4V versus 76.7V) and increased peak pulse current represent improved performance characteristics within the same voltage suppression class.
Q: What is the difference between clamping voltage specifications?
A: Clamping voltage is the maximum voltage across the diode during transient suppression at peak pulse current. SMBJ43-E3/52 specifies 76.7V clamping, while SMBJ43A variants specify 69.4V. Lower clamping voltage provides tighter voltage regulation during transient events.
Q: Are tape and reel packaged parts functionally equivalent to bulk packaged parts?
A: Yes. Tape and reel (TR) packaging is a standard manufacturing format for automated assembly. The electrical and mechanical specifications remain identical; packaging format affects only handling and assembly processes.
Q: Which substitute offers the widest operating temperature range?
A: SMBJ43A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, compared to 150°C for most alternatives. SMBJ43A-HRA and SMBJ43E3/TR13 extend the lower operating temperature to -65°C.
Q: Are all substitutes RoHS compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting standard environmental and manufacturing requirements.
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