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SMBJ45C-E3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ45C-E3/52 is a bidirectional 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 currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMBJ45C-E3/52 |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Package / Case | DO-214AA, SMB |
| Voltage - Reverse Standoff (Typ) | 45V |
| Voltage - Breakdown (Min) | 50V |
| Voltage - Clamping (Max) @ Ipp | 80.3V |
| Current - Peak Pulse (10/1000µs) | 7.5A |
| Power - Peak Pulse | 600W |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the SMBJ45C-E3/52 is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 45V
- Voltage - Breakdown (Min): 50V
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Bidirectional Channels: 1
- RoHS Status: ROHS3 Compliant
Substitute parts must maintain identical reverse standoff voltage, breakdown voltage, and package specifications to ensure direct functional compatibility. Variations in clamping voltage and peak pulse current are acceptable within the same voltage class, provided the part remains suitable for the intended application circuit.
Parameter Comparison
| Parameter | SMBJ45C-E3/52 (Main) | SMBJ45CA-E3/52 | SMBJ45CE3/TR13 | SMBJ45CA (MDD) | SMBJ45CA-13-F | SMBJ45CA-TP |
|---|---|---|---|---|---|---|
| Manufacturer | Vishay | Vishay | Microchip | MDD | Diodes Inc. | Micro Commercial Co |
| Voltage - Reverse Standoff (Typ) | 45V | 45V | 45V | 45V | 45V | 45V |
| Voltage - Breakdown (Min) | 50V | 50V | 50V | 50V | 50V | 50V |
| Voltage - Clamping (Max) @ Ipp | 80.3V | 72.7V | 80.3V | 72.7V | 72.7V | 72.7V |
| Current - Peak Pulse (10/1000µs) | 7.5A | 8.3A | 7.5A | 8.3A | 8.3A | 8.3A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W | 600W |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Operating Temperature Range | -55°C ~ 150°C | -55°C ~ 150°C | -65°C ~ 150°C | -50°C ~ 150°C | -55°C ~ 150°C | -55°C ~ 175°C |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
All substitute parts listed maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment. The SMBJ45CA-E3/52 (Vishay) and SMBJ45CE3/TR13 (Microchip) provide direct electrical equivalence with identical clamping voltage and peak pulse current specifications to the obsolete SMBJ45C-E3/52.
The SMBJ45CA variants from MDD, Diodes Incorporated, and Micro Commercial Co feature reduced clamping voltage (72.7V versus 80.3V) and increased peak pulse current (8.3A versus 7.5A) while maintaining the same reverse standoff and breakdown voltage specifications. These parts are suitable for applications where the lower clamping voltage provides improved transient suppression performance.
Temperature range considerations: The SMBJ45CE3/TR13 (Microchip) extends the lower operating temperature to -65°C, while the SMBJ45CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C. The SMBJ45CA (MDD) operates within -50°C to 150°C. Selection should align with specific application thermal requirements.
Frequently Asked Questions (FAQ)
Q: Can SMBJ45CA-E3/52 directly replace SMBJ45C-E3/52?
A: Yes. Both parts share identical reverse standoff voltage (45V), breakdown voltage (50V), and DO-214AA package specifications. The SMBJ45CA-E3/52 is manufactured by Vishay and maintains active product status, making it the primary direct replacement for the obsolete SMBJ45C-E3/52.
Q: What is the difference between parts with 80.3V and 72.7V clamping voltage?
A: The clamping voltage determines the maximum voltage the TVS diode allows across its terminals during a transient event. The 80.3V clamping variant (SMBJ45C-E3/52, SMBJ45CE3/TR13) provides higher voltage clamping, while the 72.7V variants (SMBJ45CA series) provide tighter voltage suppression. Selection depends on the specific transient suppression requirements of the protected circuit.
Q: Are all substitute parts in the same package?
A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with the original SMBJ45C-E3/52 footprint.
Q: Which substitute offers the widest operating temperature range?
A: The SMBJ45CA-TP (Micro Commercial Co) operates from -55°C to 175°C, providing the widest upper temperature limit. The SMBJ45CE3/TR13 (Microchip) extends the lower temperature limit to -65°C.
Q: Are all substitutes RoHS compliant?
A: Yes. All listed substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements.
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