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SMCJ48CE3/TR13 Transient Voltage Suppressor Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ48CE3/TR13 is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 48V reverse standoff voltage and provides clamping at 85.5V maximum, with a peak pulse current rating of 17.5A. The device is housed in a DO-214AB (SMC) package and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).
The product maintains active status with 1100 units in current inventory. Equivalent and substitute parts are identified based on matching or compatible electrical and mechanical parameters, enabling design flexibility and supply chain alternatives while maintaining circuit protection performance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Reverse Standoff Voltage (Typ) | 48 | V |
| Breakdown Voltage (Min) | 53.3 | V |
| Clamping Voltage (Max) @ Ipp | 85.5 | V |
| Peak Pulse Current (10/1000µs) | 17.5 | A |
| Peak Pulse Power | 1500 | W |
| Operating Temperature Range | -65 to 150 | °C |
| Package Type | DO-214AB (SMC) | — |
| Mounting Type | Surface Mount | — |
| Bidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution compatibility for the SMCJ48CE3/TR13 is determined by the following critical parameters:
Mandatory Matching Parameters:
- Reverse Standoff Voltage: 48V (typical)
- Breakdown Voltage (Min): 53.3V
- Package/Case: DO-214AB or SMC equivalent
- Mounting Type: Surface Mount
- Bidirectional Channels: 1
- Type: Zener TVS Diode
Allowable Variation Parameters:
- Clamping Voltage (Max) @ Ipp: 77.4V to 100V (higher clamping voltages provide equivalent or enhanced protection)
- Peak Pulse Current: 17.5A to 100A (higher current ratings maintain or exceed protection capability)
- Peak Pulse Power: 1500W to 5000W (higher power ratings are acceptable)
- Operating Temperature Range: -55°C to -65°C minimum; 150°C to 175°C maximum (equal or wider ranges acceptable)
Substitute parts are grouped into three categories based on electrical performance characteristics while maintaining the core 48V protection voltage specification.
Parameter Comparison
| Part Number | Manufacturer | Standoff Voltage (V) | Breakdown Voltage Min (V) | Clamping Voltage Max (V) | Peak Pulse Current (A) | Peak Pulse Power (W) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|
| SMCJ48CE3/TR13 | Microchip Technology | 48 | 53.3 | 85.5 | 17.5 | 1500 | -65 to 150 | DO-214AB (SMC) |
| 5.0SMDJ48CA | MDE Semiconductor Inc | 48 | 53.3 | 77.4 | 64.7 | 5000 | -55 to 150 | DO-214AB (SMC) |
| 5.0SMLJ48CA-TP | Micro Commercial Co | 48 | 53.3 | 77.4 | 64.7 | 5000 | -55 to 175 | DO-214AB (SMC) |
| SMC3K48CA-M3/57 | Vishay General Semiconductor | 48 | 53.3 | 77.4 | 38.8 | 3000 | -55 to 150 | DO-214AB (SMC) |
| SMCJ48CA | Fairchild Semiconductor | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 150 | DO-214AB (SMC) |
| SMCJ48CA-13-F | Diodes Incorporated | 48 | 53.3 | 77.4 | 19.4 | 1500 | -55 to 150 | DO-214AB (SMC) |
| SMCJ48CA-TR | STMicroelectronics | 48 | 53.3 | 100 | 100 | 1500 | -55 to 150 | DO-214AB (SMC) |
| SMDJ48CA | Alpha & Omega Semiconductor Inc. | 48 | 53.3 | 77.4 | 38.8 | 3000 | -55 to 150 | DO-214AB (SMC) |
| SMDJ48CA-T7 | Littelfuse | 48 | 53.3 | 77.4 | 38.8 | 3000 | -65 to 150 | DO-214AB (SMC) |
Engineering Selection Recommendations
Category 1: Direct Electrical Equivalents (Matched Peak Pulse Power)
SMCJ48CA (Fairchild Semiconductor) and SMCJ48CA-13-F (Diodes Incorporated) provide 1500W peak pulse power matching the original specification. Both maintain 48V standoff voltage, 53.3V minimum breakdown, and 77.4V clamping voltage. Operating temperature range is -55°C to 150°C. These parts are suitable for applications where the original thermal and current specifications are sufficient. ROHS3 compliance and MSL 1 rating are confirmed for both alternatives.
Category 2: Enhanced Current Handling (3000W Peak Pulse Power)
SMC3K48CA-M3/57 (Vishay General Semiconductor - TransZorb® series), SMDJ48CA (Alpha & Omega Semiconductor Inc.), and SMDJ48CA-T7 (Littelfuse) provide 3000W peak pulse power with 38.8A peak pulse current. These parts offer improved transient suppression capability while maintaining the 48V protection voltage. SMDJ48CA-T7 extends the minimum operating temperature to -65°C, matching the original part's lower temperature limit. All three are ROHS3 compliant with MSL 1 rating.
Category 3: Maximum Performance (5000W Peak Pulse Power)
5.0SMDJ48CA (MDE Semiconductor Inc) and 5.0SMLJ48CA-TP (Micro Commercial Co) deliver 5000W peak pulse power with 64.7A peak pulse current. These represent the highest energy dissipation capacity within the 48V standoff voltage class. 5.0SMLJ48CA-TP extends the maximum operating temperature to 175°C. Both maintain ROHS3 compliance and MSL 1 rating. Selection of these parts is appropriate for high-energy transient environments.
Category 4: Alternative Clamping Voltage (100V)
SMCJ48CA-TR (STMicroelectronics) provides 100V clamping voltage with 100A peak pulse current (8/20µs pulse definition). This part maintains 48V standoff voltage and 1500W peak pulse power. The higher clamping voltage provides additional margin in applications requiring higher transient suppression thresholds. ROHS3 compliance and MSL 1 rating are confirmed.
Compliance Verification:
All substitute parts listed maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level. REACH status varies: most parts are REACH Unaffected; SMDJ48CA-T7 (Littelfuse) is REACH Affected. ECCN classification EAR99 applies to all parts. HTSUS code 8541.10.0080 is consistent across all alternatives.
Frequently Asked Questions (FAQ)
Q1: Can I substitute SMCJ48CA-TR for SMCJ48CE3/TR13 in my circuit?
A: SMCJ48CA-TR is electrically compatible based on matching 48V standoff voltage and 53.3V minimum breakdown voltage. However, the clamping voltage differs: SMCJ48CA-TR clamps at 100V maximum versus 85.5V for the original part. This higher clamping voltage may be acceptable or beneficial depending on your circuit's transient suppression requirements. Both parts use DO-214AB (SMC) packaging and surface-mount technology. Verify that your circuit design tolerates the 100V clamping threshold before substitution.
Q2: What is the difference between the 1500W, 3000W, and 5000W power-rated parts?
A: Peak pulse power rating indicates the maximum energy the TVS diode can dissipate during a transient event. The 1500W parts (SMCJ48CE3/TR13, SMCJ48CA, SMCJ48CA-13-F, SMCJ48CA-TR) are suitable for lower-energy transient environments. The 3000W parts (SMC3K48CA-M3/57, SMDJ48CA, SMDJ48CA-T7) provide enhanced protection for moderate transient energy. The 5000W parts (5.0SMDJ48CA, 5.0SMLJ48CA-TP) are designed for high-energy transient suppression. Selection depends on the expected transient energy in your application, not on circuit voltage alone.
Q3: Does operating temperature range affect substitution compatibility?
A: Operating temperature range does not prevent substitution but should be verified against your application requirements. The original SMCJ48CE3/TR13 operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C, which is acceptable for most commercial and industrial applications. SMDJ48CA-T7 matches the -65°C lower limit. 5.0SMLJ48CA-TP extends to 175°C maximum. If your application requires operation below -55°C, select SMCJ48CE3/TR13 or SMDJ48CA-T7. If higher temperature operation is needed, select 5.0SMLJ48CA-TP.
Q4: Are all substitute parts ROHS3 compliant?
A: Yes, all substitute parts listed are ROHS3 compliant. Moisture sensitivity level (MSL) is 1 (unlimited) for all parts, indicating no moisture-related storage or handling restrictions. REACH compliance status varies: most parts are REACH Unaffected; SMDJ48CA-T7 is REACH Affected. Verify REACH compliance requirements for your specific application and supply chain.
Q5: What does "bidirectional" mean for TVS diodes, and do all substitutes maintain this feature?
A: Bidirectional TVS diodes suppress transient overvoltages in both positive and negative directions relative to ground, providing protection for AC signals and differential voltage lines. All substitute parts listed maintain 1 bidirectional channel, matching the original SMCJ48CE3/TR13 specification. This ensures equivalent protection performance for bidirectional transient suppression applications.
Q6: Can I use a higher peak pulse current rated part as a direct substitute?
A: Yes. A TVS diode with higher peak pulse current rating (for example, 64.7A instead of 17.5A) provides equivalent or enhanced transient suppression capability. Higher current ratings indicate the device can handle larger transient currents without degradation. This is a safe substitution direction. However, verify that the clamping voltage and other electrical parameters remain compatible with your circuit design.
Q7: What packaging considerations apply to these substitutes?
A: All substitute parts use DO-214AB (SMC) surface-mount packaging, matching the original SMCJ48CE3/TR13. This ensures mechanical and thermal compatibility with existing PCB layouts and reflow soldering processes. No package redesign or PCB modification is required when substituting between these parts. Verify that your assembly process and thermal management design accommodate the specific manufacturer's package dimensions if transitioning between suppliers.
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