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SMCJ7.0 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ7.0 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 7V reverse standoff voltage with 12.6V maximum clamping voltage at peak pulse current, housed in a DO-214AB (SMC) package. The SMCJ7.0 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 7 | V |
| Voltage - Breakdown (Min) | 7.37 | V |
| Voltage - Clamping (Max) @ Ipp | 12.6 | V |
| Current - Peak Pulse (10/1000µs) | 125 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -55 to 150 | °C |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SMCJ7.0 is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): Must be 7V
- Voltage - Clamping (Max) @ Ipp: Must be within 12V to 12.6V range
- Current - Peak Pulse (10/1000µs): Must be 125A or greater
- Power - Peak Pulse: Must be 1500W or greater
- Package / Case: Must be DO-214AB or SMC equivalent
- Type: Must be Zener unidirectional
- Mounting Type: Must be Surface Mount
- RoHS Status: Must be ROHS3 Compliant
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents (125A Peak Pulse Current): Parts maintaining the original 125A peak pulse specification with clamping voltages between 12V and 12.6V. These include SMCJ7.0A (MDD), SMCJ7.0A-13-F (Diodes Incorporated), SMCJ7.0A-TP (Micro Commercial Co), SMCJ7.0AE3/TR13 (Microchip Technology), TV15C7V0J-G (Comchip Technology), and SMCJ7.0E3/TR13 (Microchip Technology, with 13.3V clamping).
Category B - Higher Current Capability (250A Peak Pulse Current): Parts with doubled peak pulse current capacity (250A) and doubled power dissipation (3000W), maintaining the same voltage parameters. These include SMLJ7.0A (Bourns Inc.), SMLJ7.0A-TP (Micro Commercial Co), and SMLJ7.0AE3/TR13 (Microchip Technology).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Product Status | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature Range | Package / Case | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ7.0 | Littelfuse Inc. | Obsolete | 7V | 12.6V | 125A | 1500W | -55 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ7.0A | MDD | Active | 7V | 12V | 125A | 1500W | -50 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ7.0A-13-F | Diodes Incorporated | Active | 7V | 12V | 125A | 1500W | -55 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ7.0A-TP | Micro Commercial Co | Active | 7V | 12V | 125A | 1500W | -55 to 175°C | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ7.0AE3/TR13 | Microchip Technology | Active | 7V | 12V | 125A | 1500W | -65 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ7.0E3/TR13 | Microchip Technology | Active | 7V | 13.3V | 112.8A | 1500W | -65 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMLJ7.0A | Bourns Inc. | Active | 7V | 12V | 250A | 3000W | -55 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| SMLJ7.0A-TP | Micro Commercial Co | Active | 7V | 12V | 250A | 3000W | -55 to 175°C | DO-214AB, SMC | ROHS3 Compliant |
| SMLJ7.0AE3/TR13 | Microchip Technology | Active | 7V | 12V | 250A | 3000W | -55 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
| TV15C7V0J-G | Comchip Technology | Active | 7V | 12V | 125A | 1500W | -55 to 150°C | DO-214AB, SMC | ROHS3 Compliant |
Engineering Selection Recommendations
All identified substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.
For direct replacement with identical electrical specifications: SMCJ7.0A-13-F (Diodes Incorporated), SMCJ7.0AE3/TR13 (Microchip Technology), or TV15C7V0J-G (Comchip Technology) are recommended. These parts are in active production status with established supply chains and maintain the original 125A peak pulse current and 1500W power dissipation.
For applications requiring extended temperature operation: SMCJ7.0A-TP (Micro Commercial Co) and SMLJ7.0A-TP (Micro Commercial Co) support operating temperatures to 175°C, compared to the standard 150°C maximum. SMCJ7.0AE3/TR13 and SMLJ7.0AE3/TR13 (Microchip Technology) support operation to -65°C minimum, extending the lower temperature range.
For applications with higher transient energy requirements: SMLJ7.0A (Bourns Inc.), SMLJ7.0A-TP (Micro Commercial Co), and SMLJ7.0AE3/TR13 (Microchip Technology) provide doubled peak pulse current (250A) and power dissipation (3000W) while maintaining identical voltage parameters and package form factor.
For standard applications with no extended requirements: SMCJ7.0A (MDD) offers the most economical active substitute with full electrical equivalence and established inventory availability.
Frequently Asked Questions (FAQ)
Q: Can SMCJ7.0E3/TR13 be used as a direct replacement for SMCJ7.0?
A: SMCJ7.0E3/TR13 maintains the 7V reverse standoff voltage and 125A peak pulse current but features a maximum clamping voltage of 13.3V compared to the original 12.6V. This higher clamping voltage may exceed protection thresholds in circuits designed for the tighter 12.6V specification. Use only when circuit design permits the higher clamping voltage.
Q: What is the difference between SMCJ7.0A and SMLJ7.0A?
A: Both maintain identical voltage parameters (7V reverse standoff, 12V clamping). The primary difference is peak pulse current and power dissipation: SMCJ7.0A handles 125A and 1500W, while SMLJ7.0A handles 250A and 3000W. SMLJ7.0A is suitable for applications experiencing higher transient energy levels.
Q: Are all substitute parts available in Tape & Reel packaging?
A: Most substitute parts are available in Tape & Reel (TR) packaging. SMLJ7.0A-TP is listed as Bulk packaging. Verify packaging availability with the specific manufacturer or distributor for your procurement requirements.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes, all identified substitute parts are ROHS3 Compliant and maintain MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage conditions.
Q: Can SMCJ7.0A-TP be used in applications requiring operation below -55°C?
A: SMCJ7.0A-TP supports operation from -55°C to 175°C. For applications requiring operation below -55°C, SMCJ7.0AE3/TR13 or SMLJ7.0AE3/TR13 (Microchip Technology) support minimum operating temperatures of -65°C.
Q: Is the DO-214AB package identical across all substitute parts?
A: Yes, all substitute parts use the DO-214AB (SMC) package form factor, ensuring mechanical compatibility with existing PCB layouts and assembly processes. Verify footprint compatibility with your specific design documentation.
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