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SMCJ48A-TP Transient Voltage Suppressor Diode
Part Overview
The SMCJ48A-TP is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 19.4A peak pulse current capability in a DO-214AB (SMC) package. The part is ROHS3 compliant, REACH unaffected, and maintains an active product status with unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and thermal operating ranges to ensure direct functional replacement in circuit designs.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 48 | V |
| Voltage - Breakdown (Min) | 53.3 | V |
| Voltage - Clamping (Max) @ Ipp | 77.4 | V |
| Current - Peak Pulse (10/1000µs) | 19.4 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -55 to 175 | °C |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ48A-TP are categorized into two groups based on electrical and mechanical compatibility:
Direct Equivalents maintain identical electrical specifications: 48V reverse standoff voltage, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, and 19.4A peak pulse current. These parts are functionally interchangeable in the same circuit application without performance degradation. Direct equivalents include SMCJ48A (MDD), SMCJ48A-13-F (Diodes Incorporated), SMCJ48A-E3/57T (Vishay), and SMCJ48A-E3/9AT (Vishay).
Similar Parts share the same voltage specifications (48V standoff, 53.3V breakdown, 77.4V clamping) but differ in peak pulse current and power dissipation ratings. These components provide enhanced protection capability and are suitable for applications requiring higher transient energy absorption. Similar parts include 5.0SMDJ48A (Taiwan Semiconductor Corporation) with 64.7A peak pulse and 5000W power rating, 5.0SMDJ48A-T7 (Littelfuse) with 64.7A peak pulse and 5000W power rating, SMDJ48A (Alpha & Omega Semiconductor) with 38.8A peak pulse and 3000W power rating, and SMLJ48A (Bourns) with 38.8A peak pulse and 3000W power rating.
All substitute parts maintain DO-214AB (SMC) package compatibility, unidirectional channel configuration, and ROHS3 compliance. Selection between direct equivalents and similar parts depends on circuit transient energy requirements and thermal design margins.
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 | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ48A-TP | Micro Commercial Co | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ48A | MDD | 48 | 53.3 | 77.4 | 19.4 | 1500 | -50 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ48A-13-F | Diodes Incorporated | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ48A-E3/57T | Vishay General Semiconductor - Diodes Division | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMCJ48A-E3/9AT | Vishay General Semiconductor - Diodes Division | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ48A | Taiwan Semiconductor Corporation | 48 | 53.3 | 77.4 | 64.7 | 5000 | -55 to 175 | DO-214AB, SMC | ROHS3 Compliant |
| 5.0SMDJ48A-T7 | Littelfuse | 48 | 53.3 | 77.4 | 64.7 | 5000 | -65 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMDJ48A | Alpha & Omega Semiconductor Inc. | 48 | 53.3 | 77.4 | 38.8 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
| SMLJ48A | Bourns Inc. | 48 | 53.3 | 77.4 | 38.8 | 3000 | -55 to 150 | DO-214AB, SMC | ROHS3 Compliant |
Engineering Selection Recommendations
Direct equivalents (SMCJ48A, SMCJ48A-13-F, SMCJ48A-E3/57T, SMCJ48A-E3/9AT) are suitable for applications where the original 1500W peak pulse power specification is sufficient. All direct equivalents maintain ROHS3 compliance and active product status. The SMCJ48A-TP operates across -55°C to 175°C, while MDD's SMCJ48A variant operates -50°C to 150°C; verify thermal requirements for applications approaching temperature extremes.
Similar parts with higher power ratings (5.0SMDJ48A series at 5000W and SMDJ48A/SMLJ48A at 3000W) are appropriate for circuits experiencing higher transient energy levels or requiring additional thermal margin. The 5.0SMDJ48A from Taiwan Semiconductor Corporation matches the original -55°C to 175°C operating range. The 5.0SMDJ48A-T7 from Littelfuse extends the lower temperature limit to -65°C. All substitute parts maintain ROHS3 compliance and unidirectional channel configuration.
Selection between direct equivalents and similar parts depends on circuit transient energy budget and thermal design requirements. All listed parts are active products with unlimited moisture sensitivity rating (MSL 1).
Frequently Asked Questions (FAQ)
Q: Can SMCJ48A-TP be directly replaced with SMCJ48A from MDD?
A: Yes, SMCJ48A from MDD is a direct electrical equivalent with identical voltage specifications (48V standoff, 53.3V breakdown, 77.4V clamping) and peak pulse current (19.4A). Both maintain DO-214AB package compatibility and ROHS3 compliance. Operating temperature range differs slightly (MDD: -50°C to 150°C vs. original: -55°C to 175°C); verify application temperature requirements.
Q: What is the difference between direct equivalents and similar parts?
A: Direct equivalents maintain identical electrical specifications including 19.4A peak pulse current and 1500W power dissipation. Similar parts (5.0SMDJ48A, 5.0SMDJ48A-T7, SMDJ48A, SMLJ48A) share the same voltage ratings but provide higher peak pulse current (38.8A to 64.7A) and power dissipation (3000W to 5000W). Similar parts are suitable for applications requiring enhanced transient protection or higher energy absorption capability.
Q: Are all substitute parts compatible with the DO-214AB package footprint?
A: Yes, all listed substitute parts use the DO-214AB (SMC) package, ensuring mechanical and thermal compatibility with the original SMCJ48A-TP footprint. No PCB layout modifications are required for direct substitution.
Q: Which substitute part should be selected for high-temperature applications?
A: The SMCJ48A-TP and 5.0SMDJ48A both support the extended operating range of -55°C to 175°C. For applications requiring higher transient energy absorption within this temperature range, the 5.0SMDJ48A is recommended.
Q: Are all substitute parts ROHS3 compliant?
A: Yes, all listed substitute parts maintain ROHS3 compliance. SMLJ48A from Bourns is REACH affected; verify REACH compliance requirements for your application.
Q: What is the moisture sensitivity level for substitute parts?
A: All substitute parts maintain MSL 1 (Unlimited) rating, matching the original SMCJ48A-TP specification.
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