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SMCJ13C Transient Voltage Suppressor Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ13C is a bidirectional Zener transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 13V reverse standoff voltage with a 22.58V maximum clamping voltage and 69.8A peak pulse current capability in a surface-mount DO-214AB (SMC) package. The SMCJ13C is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | SMCJ13C | — |
| Manufacturer | Littelfuse Inc. | — |
| Product Status | Obsolete | — |
| Type | Zener | — |
| Voltage - Reverse Standoff (Typ) | 13 | V |
| Voltage - Breakdown (Min) | 13.64 | V |
| Voltage - Clamping (Max) @ Ipp | 22.58 | V |
| Current - Peak Pulse (10/1000µs) | 69.8 | A |
| Power - Peak Pulse | 1500 | W |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature Range | -55 to 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution validity for the SMCJ13C is determined by the following critical parameters:
Primary Matching Criteria:
- Voltage - Reverse Standoff (Typ): 13V
- Voltage - Breakdown (Min): 13.64V to 14.4V range
- Mounting Type: Surface Mount
- Package / Case: DO-214AB or SMC equivalent
- Bidirectional Channels: 1
- Type: Zener
Secondary Compatibility Factors:
- Voltage - Clamping (Max) @ Ipp: 21.5V to 23.8V acceptable range
- Current - Peak Pulse (10/1000µs): 63A to 139.4A acceptable range
- Power - Peak Pulse: 1500W to 3000W acceptable range
- Operating Temperature: -55°C to 175°C acceptable range
- RoHS3 Compliance and MSL Level 1 status
Substitute parts meeting these criteria maintain functional equivalence for general-purpose transient voltage suppression applications while accommodating minor variations in clamping voltage and peak pulse current within the specified tolerance bands.
Parameter Comparison
| Parameter | SMCJ13C (Littelfuse) | SMCJ13CA (Fairchild) | SMCJ13CA-13-F (Diodes Inc.) | SMCJ13CA-M3/57T (Vishay) | SMCJ13CA-TP (MCC) | SMCJ13CAE3/TR13 (Microchip) | SMCJ13CE3/TR13 (Microchip) | SMLJ13CA (Bourns) |
|---|---|---|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 13V | 13V | 13V | 13V | 13V | 13V | 13V | 13V |
| Voltage - Breakdown (Min) | 13.64V | 14.4V | 14.4V | 14.4V | 14.4V | 14.4V | 14.4V | 14.4V |
| Voltage - Clamping (Max) @ Ipp | 22.58V | 21.5V | 21.5V | 21.5V | 21.5V | 21.5V | 23.8V | 21.5V |
| Current - Peak Pulse (10/1000µs) | 69.8A | 69.8A | 69.7A | 69.8A | 69.8A | 69.7A | 63A | 139.4A |
| Power - Peak Pulse | 1500W | 1500W | 1500W | 1500W | 1500W | 1500W | 1500W | 3000W |
| Package / Case | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMCJ | DO-214AB, SMCJ | DO-214AB, SMC |
| Operating Temperature Range | -55 to 150°C | -55 to 150°C | -55 to 150°C | -55 to 150°C | -55 to 175°C | -65 to 150°C | -65 to 150°C | -55 to 150°C |
| RoHS Status | ROHS3 Compliant | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed substitute parts are active products with ROHS3 compliance and MSL Level 1 rating, providing long-term availability and regulatory alignment superior to the obsolete SMCJ13C.
Primary Substitutes (Closest Electrical Match): SMCJ13CA variants from Fairchild Semiconductor, Diodes Incorporated, Vishay, and Micro Commercial Co maintain identical reverse standoff voltage (13V), breakdown voltage (14.4V), clamping voltage (21.5V), and peak pulse current (69.8A) specifications. These parts are functionally equivalent for direct replacement in existing designs.
Extended Temperature Range Option: SMCJ13CA-TP from Micro Commercial Co extends the operating temperature range to -55 to 175°C, providing enhanced thermal performance for applications requiring elevated temperature operation.
Lower Peak Pulse Current Alternative: SMCJ13CE3/TR13 from Microchip Technology operates at 63A peak pulse current with a slightly elevated clamping voltage of 23.8V. This variant is suitable for applications with reduced transient current requirements.
Higher Power Dissipation Option: SMLJ13CA from Bourns Inc. doubles the peak pulse power rating to 3000W while maintaining the same voltage specifications and 69.8A peak pulse current. This part accommodates designs requiring enhanced energy absorption capability.
Frequently Asked Questions (FAQ)
Q: Can SMCJ13CA directly replace SMCJ13C in existing PCB layouts? A: Yes. SMCJ13CA maintains identical DO-214AB (SMC) package geometry, pinout, and electrical specifications (13V standoff, 14.4V breakdown, 21.5V clamping, 69.8A peak pulse). No layout modifications are required.
Q: What is the significance of the clamping voltage difference between SMCJ13C (22.58V) and SMCJ13CA (21.5V)? A: The SMCJ13C exhibits a higher maximum clamping voltage by 1.08V. For applications with strict voltage limiting requirements, SMCJ13CA provides tighter clamping performance. For general-purpose protection, both values fall within acceptable transient suppression ranges.
Q: Why does SMLJ13CA have double the power rating? A: SMLJ13CA is a higher-current variant (139.4A vs. 69.8A) designed for applications requiring greater transient energy absorption. The 3000W power rating reflects this increased current-handling capability. Use SMLJ13CA only if your application requires this enhanced performance; standard SMCJ13CA variants are adequate for 1500W applications.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All active substitute parts listed carry ROHS3 Compliant certification, ensuring regulatory compliance for modern manufacturing and end-use applications.
Q: What packaging formats are available for these substitutes? A: All substitutes are supplied in DO-214AB (SMC) surface-mount packages. Tape & Reel (TR) packaging is available for high-volume procurement from Vishay, Microchip, and Bourns variants. Bulk or cut-tape formats may be available through authorized distributors.
Q: Can SMCJ13CAE3/TR13 or SMCJ13CE3/TR13 from Microchip be used interchangeably? A: SMCJ13CAE3/TR13 is a direct electrical equivalent to SMCJ13CA with extended temperature range (-65 to 150°C). SMCJ13CE3/TR13 operates at reduced peak pulse current (63A) with elevated clamping voltage (23.8V). These are not interchangeable; select based on your specific current and temperature requirements.
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