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SMCJ75CA-TP Transient Voltage Suppressor Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ75CA-TP is a bidirectional Zener transient voltage suppressor diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This TVS diode operates with a 75V reverse standoff voltage and provides 121V maximum clamping voltage at peak pulse current of 12.4A, delivering 1500W peak pulse power dissipation in a DO-214AB (SMC) package. The component is ROHS3 compliant, active in production status, and suitable for applications requiring transient voltage suppression across a wide operating temperature range of -55°C to 175°C.
Equivalent and substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatibility with the DO-214AB surface-mount package footprint and general-purpose application requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 75 | V |
| Voltage - Breakdown (Min) | 83.3 | V |
| Voltage - Clamping (Max) @ Ipp | 121 | V |
| Current - Peak Pulse (10/1000µs) | 12.4 | A |
| Power - Peak Pulse | 1500 | W |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| Operating Temperature Range | -55 to 175 | °C |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts are classified into two categories based on electrical parameter compatibility:
Direct Substitutes (Equivalent Performance): Parts matching the SMCJ75CA-TP across all critical electrical parameters—75V reverse standoff voltage, 83.3V minimum breakdown voltage, 121V maximum clamping voltage, and 12.4A peak pulse current—while maintaining the DO-214AB surface-mount package. These parts are interchangeable without circuit redesign.
Similar Substitutes (Enhanced Performance): Parts sharing the same voltage ratings (75V standoff, 121V clamping) and DO-214AB package but with higher peak pulse current ratings (24.8A or 41.4A) and correspondingly higher power dissipation (3000W or 5000W). These parts provide superior transient suppression capability and are suitable for applications requiring increased margin or higher energy absorption.
Key Parameters Determining Substitution:
- Voltage - Reverse Standoff: 75V (fixed across all substitutes)
- Voltage - Clamping (Max) @ Ipp: 121V (fixed across all substitutes)
- Package / Case: DO-214AB, SMC (mandatory for footprint compatibility)
- Mounting Type: Surface Mount (mandatory)
- Type: Zener, Bidirectional (fixed across all substitutes)
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown Min (V) | Voltage - Clamping Max @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Package | Packaging Type | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SMCJ75CA-TP | Micro Commercial Co | 75 | 83.3 | 121 | 12.4 | 1500 | -55 to 175 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
| 1SMC75CA TR13 PBFREE | Central Semiconductor Corp | 75 | 83.3 | 121 | 12.4 | 1500 | -65 to 150 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
| SMCJ75CA | Fairchild Semiconductor | 75 | 83.3 | 121 | 12.4 | 1500 | -55 to 150 | DO-214AB, SMC | Bulk | Not specified |
| SMCJ75CA-E3/57T | Vishay General Semiconductor - Diodes Division | 75 | 83.3 | 121 | 12.4 | 1500 | -55 to 150 | DO-214AB, SMC | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
| 5.0SMDJ75CA | MDE Semiconductor Inc | 75 | 83.3 | 121 | 41.4 | 5000 | -55 to 150 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
| 5.0SMDJ75CA-T7 | Littelfuse Inc. | 75 | 83.3 | 121 | 41.4 | 5000 | -65 to 150 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
| SMDJ75CA | SMC Diode Solutions | 75 | 83.3 | 121 | 24.8 | 3000 | -55 to 150 | DO-214AB, SMC | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
| SMDJ75CA-T7 | Littelfuse | 75 | 83.3 | 121 | 24.8 | 3000 | -65 to 150 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
| SMLJ75CA | Bourns Inc. | 75 | 83.3 | 121 | 24.8 | 3000 | -55 to 150 | DO-214AB, SMC | Tape & Reel (TR) | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Substitutes (Equivalent Performance):
The 1SMC75CA TR13 PBFREE (Central Semiconductor Corp), SMCJ75CA (Fairchild Semiconductor), and SMCJ75CA-E3/57T (Vishay General Semiconductor) are direct electrical equivalents to the SMCJ75CA-TP. All three maintain identical voltage ratings (75V standoff, 121V clamping) and peak pulse current (12.4A), with 1500W power dissipation. All are ROHS3 compliant and active in production. The primary differences are packaging format (Tape & Reel, Bulk, or Cut Tape) and operating temperature upper limits (150°C or 175°C). Selection among these should be based on procurement requirements and temperature margin needs for the specific application.
Similar Substitutes (Enhanced Performance):
The 5.0SMDJ75CA and 5.0SMDJ75CA-T7 (41.4A peak pulse, 5000W power) provide 3.3× higher current handling and energy absorption compared to the SMCJ75CA-TP. The SMDJ75CA and SMDJ75CA-T7 (24.8A peak pulse, 3000W power) provide 2× higher performance. These enhanced-performance variants maintain identical voltage characteristics and DO-214AB package compatibility. Selection of enhanced-performance substitutes is appropriate when circuit analysis indicates higher transient energy levels or when design margin improvement is required. All enhanced-performance variants are ROHS3 compliant and active in production.
Compliance and Certification:
All identified substitutes maintain ROHS3 compliance and are active production components. The SMLJ75CA (Bourns Inc.) carries REACH Affected status, while all other substitutes are REACH Unaffected. This distinction may be relevant for applications subject to REACH regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can I use a higher-current TVS diode (5.0SMDJ75CA or SMDJ75CA) as a direct replacement for the SMCJ75CA-TP?
A: Yes. The 5.0SMDJ75CA and SMDJ75CA maintain identical voltage ratings (75V standoff, 121V clamping) and the same DO-214AB surface-mount package footprint. Higher peak pulse current ratings provide additional transient suppression capability without affecting circuit compatibility. No circuit redesign is required.
Q: What is the difference between the SMCJ75CA-TP and SMCJ75CA?
A: Both parts are electrically identical with 75V standoff voltage, 121V clamping voltage, and 12.4A peak pulse current. The primary difference is packaging: SMCJ75CA-TP is supplied in Tape & Reel format, while SMCJ75CA is supplied in Bulk. The SMCJ75CA-TP has a maximum operating temperature of 175°C, while SMCJ75CA is rated to 150°C.
Q: Are all substitute parts available in Tape & Reel packaging?
A: Most substitutes are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats suitable for automated assembly. The SMCJ75CA (Fairchild Semiconductor) is supplied in Bulk packaging. Verify packaging format with your supplier based on assembly requirements.
Q: Do all substitutes meet ROHS3 compliance?
A: Yes. All identified direct and similar substitutes are ROHS3 compliant. The SMLJ75CA (Bourns Inc.) is REACH Affected, while all other substitutes are REACH Unaffected. Confirm REACH status requirements for your application before final selection.
Q: What is the operating temperature range difference between the SMCJ75CA-TP and substitute parts?
A: The SMCJ75CA-TP operates from -55°C to 175°C. Most direct substitutes (SMCJ75CA, SMCJ75CA-E3/57T, SMDJ75CA, SMLJ75CA) operate to 150°C maximum. The 1SMC75CA TR13 PBFREE, 5.0SMDJ75CA-T7, and SMDJ75CA-T7 extend the lower temperature limit to -65°C. Select based on your application's thermal requirements.
Q: Can I substitute a 1500W TVS diode with a 3000W or 5000W variant?
A: Yes. Higher power-rated variants (SMDJ75CA at 3000W or 5.0SMDJ75CA at 5000W) provide superior transient energy absorption while maintaining identical voltage protection levels and package compatibility. This substitution improves design margin and is appropriate for applications with higher transient energy exposure.
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