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SMCJ78CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMCJ78CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 78V and provides clamping at 139V maximum, with peak pulse current handling of 10.8A and peak pulse power dissipation of 1500W. The device is packaged in DO-214AB (SMC) format and is RoHS3 compliant with unlimited moisture sensitivity rating.
The SMCJ78CE3/TR13 is currently in active product status with 977 pieces in stock. Equivalent and substitute parts are identified based on matching electrical parameters (reverse standoff voltage, breakdown voltage, clamping voltage, and current ratings) and mechanical compatibility (surface-mount DO-214AB packaging). Substitutes may vary in peak pulse current capacity and power dissipation, allowing selection based on specific circuit protection requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | SMCJ78CE3/TR13 | — |
| Manufacturer | Microchip Technology | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener | — |
| Voltage - Reverse Standoff (Typ) | 78 | V |
| Voltage - Breakdown (Min) | 86.7 | V |
| Voltage - Clamping (Max) @ Ipp | 139 | V |
| Current - Peak Pulse (10/1000µs) | 10.8 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -65 to 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ78CE3/TR13 are qualified based on the following electrical and mechanical parameters:
Critical Matching Parameters:
- Voltage - Reverse Standoff (Typ): 78V
- Voltage - Breakdown (Min): 86.7V
- Package / Case: DO-214AB, SMC (surface mount)
- Bidirectional Channels: 1
- Type: Zener
- Applications: General Purpose
Variable Parameters (Allowable Substitution Range):
- Voltage - Clamping (Max) @ Ipp: 126V to 139V (lower clamping voltage provides enhanced protection margin)
- Current - Peak Pulse (10/1000µs): 10.8A to 39.7A (higher current capacity accommodates higher transient stress)
- Power - Peak Pulse: 1500W to 5000W (higher power dissipation capability)
- Operating Temperature Range: -65°C to -50°C minimum; 150°C maximum (overlap required)
All substitute parts maintain identical reverse standoff and breakdown voltage specifications, ensuring consistent circuit protection thresholds. Variations in clamping voltage, peak pulse current, and power dissipation allow selection based on application-specific transient stress levels and thermal management requirements. All qualified substitutes are RoHS3 compliant and feature unlimited moisture sensitivity rating (MSL 1).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown (V) | Voltage - Clamping (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ78CE3/TR13 | Microchip Technology | 78 | 86.7 | 139 | 10.8 | 1500 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ78CA | MDE Semiconductor Inc | 78 | 86.7 | 126 | 39.7 | 5000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMC3K78CA-M3/57 | Vishay General Semiconductor - Diodes Division | 78 | 86.7 | 126 | 23.8 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ78CA | MDD | 78 | 86.7 | 126 | 11.9 | 1500 | -50 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ78CA-13-F | Diodes Incorporated | 78 | 86.7 | 126 | 11.4 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMDJ78CA | Alpha & Omega Semiconductor Inc. | 78 | 86.7 | 126 | 23.9 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMDJ78CA-T7 | Littelfuse Inc. | 78 | 86.7 | 126 | 23.8 | 3000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMLJ78CA | Bourns Inc. | 78 | 86.7 | 126 | 22.8 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
Engineering Selection Recommendations
All substitute parts listed maintain full electrical compatibility with the SMCJ78CE3/TR13 through matching reverse standoff voltage (78V) and breakdown voltage (86.7V) specifications. Selection among qualified substitutes is determined by application-specific requirements for transient current handling and thermal dissipation capacity.
For applications with baseline transient stress levels: SMCJ78CA (MDD) and SMCJ78CA-13-F (Diodes Incorporated) provide equivalent peak pulse current (11.9A and 11.4A respectively) and power dissipation (1500W) matching the original part. Both maintain RoHS3 compliance and unlimited moisture sensitivity rating. SMCJ78CA-13-F extends the operating temperature range to -55°C minimum, matching most substitute options.
For applications with elevated transient stress levels: SMDJ78CA (Alpha & Omega Semiconductor Inc.), SMDJ78CA-T7 (Littelfuse Inc.), and SMLJ78CA (Bourns Inc.) provide increased peak pulse current capacity (23.8A to 23.9A) and power dissipation (3000W), accommodating higher transient energy. SMDJ78CA-T7 maintains the full operating temperature range (-65°C to 150°C) of the original part.
For applications requiring maximum transient protection: SMC3K78CA-M3/57 (Vishay General Semiconductor - Diodes Division) and 5.0SMDJ78CA (MDE Semiconductor Inc) deliver the highest peak pulse current (23.8A and 39.7A respectively) and power dissipation (3000W and 5000W). These options accommodate the most severe transient conditions while maintaining RoHS3 compliance.
All substitute parts are active products with confirmed inventory availability. Selection should account for operating temperature requirements, with SMCJ78CE3/TR13 and SMDJ78CA-T7 supporting the extended -65°C minimum temperature range.
Frequently Asked Questions (FAQ)
Q: What electrical parameters must match between the SMCJ78CE3/TR13 and substitute parts?
A: The reverse standoff voltage (78V) and breakdown voltage (86.7V) must match exactly. These parameters define the circuit protection threshold and cannot vary. All qualified substitutes maintain these specifications.
Q: Can I use a substitute part with lower peak pulse current than the original?
A: No. Substitute parts must equal or exceed the original peak pulse current specification (10.8A). Lower current capacity reduces transient protection effectiveness. All qualified substitutes meet or exceed this requirement.
Q: What is the significance of clamping voltage variation between 126V and 139V?
A: Lower clamping voltage (126V) provides a tighter protection margin by limiting voltage rise to a lower level during transient events. This represents enhanced protection performance. The original part clamps at 139V maximum, while most substitutes clamp at 126V, offering improved protection characteristics.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All qualified substitute parts listed are RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the original part's environmental compliance status.
Q: Does operating temperature range affect substitution compatibility?
A: Operating temperature range does not prevent substitution, but application requirements must be satisfied. The original part operates from -65°C to 150°C. Substitutes operate from -50°C to -55°C minimum. If your application requires operation below -50°C, select SMCJ78CE3/TR13 or SMDJ78CA-T7.
Q: What is the difference between SMCJ, SMDJ, and SMLJ series designations?
A: These designations indicate different manufacturer product lines within the 78V TVS diode category. SMCJ, SMDJ, and SMLJ are distinct series from different manufacturers (Microchip, Alpha & Omega/Littelfuse, and Bourns respectively), but all meet the same electrical specifications for 78V reverse standoff voltage and are packaged in DO-214AB (SMC) format.
Q: Can I substitute based on power dissipation rating alone?
A: No. Power dissipation is a secondary parameter. Primary substitution criteria are reverse standoff voltage, breakdown voltage, and package type. Peak pulse current capacity must equal or exceed the original specification. Power dissipation is a consequence of these electrical parameters and application conditions.
Q: Is the DO-214AB package identical across all substitute parts?
A: Yes. All substitute parts use the DO-214AB (SMC) surface-mount package, ensuring mechanical and footprint compatibility. This package designation is consistent across all qualified substitutes.
Q: Which substitute offers the best thermal performance?
A: 5.0SMDJ78CA (MDE Semiconductor Inc) provides the highest peak pulse power dissipation rating (5000W), followed by SMC3K78CA-M3/57, SMDJ78CA, SMDJ78CA-T7, and SMLJ78CA (all 3000W). Selection depends on your circuit's transient energy profile and thermal management design.
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