Request Quote
(Ships tomorrow)
SMCJ54 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ54 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. The device features a 54V reverse standoff voltage with a maximum clamping voltage of 91.46V at peak pulse current of 17.3A, packaged in the DO-214AB (SMC) surface mount configuration. The SMCJ54 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives with comparable electrical characteristics are available from multiple manufacturers.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 54 | V |
| Voltage - Breakdown (Min) | 56.84 | V |
| Voltage - Clamping (Max) @ Ipp | 91.46 | V |
| Current - Peak Pulse (10/1000µs) | 17.3 | A |
| Power - Peak Pulse | 1500 | W |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature Range | -55 to 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the SMCJ54 is determined by strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff (Typ): 54V
- Voltage - Clamping (Max) @ Ipp: 87.1V to 96.3V (acceptable range for general-purpose protection)
- Current - Peak Pulse (10/1000µs): 15.6A to 34.4A (dependent on power dissipation requirements)
- Power - Peak Pulse: 1500W to 3000W (dependent on application demands)
- Package / Case: DO-214AB, SMC (surface mount compatibility)
- Type: Zener, Unidirectional (1 channel)
- Mounting Type: Surface Mount
- Operating Temperature: -55°C minimum to 150°C minimum
Secondary Compliance Parameters:
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Substitute parts are grouped into two categories based on peak pulse current and power dissipation: standard current devices (SMCJ54A series, 17.2A to 17.3A, 1500W) and high-current devices (SMLJ54A series, 34.4A, 3000W). Selection depends on the specific transient energy absorption requirements of the application.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Product Status | Package |
|---|---|---|---|---|---|---|---|---|
| SMCJ54 | Littelfuse | 54 | 91.46 | 17.3 | 1500 | -55 to 150 | Obsolete | DO-214AB, SMC |
| SMCJ54A | Meritek | 54 | 87.1 | 17.22 | 1500 | -55 to 150 | Active | DO-214AB, SMC |
| SMCJ54A-13-F | Diodes Incorporated | 54 | 87.1 | 17.2 | 1500 | -55 to 150 | Active | DO-214AB, SMC |
| SMCJ54A-TP | Micro Commercial Co | 54 | 87.1 | 17.3 | 1500 | -55 to 175 | Active | DO-214AB, SMC |
| SMCJ54AE3/TR13 | Microchip Technology | 54 | 87.1 | 17.2 | 1500 | -65 to 150 | Active | DO-214AB, SMC |
| SMCJ54E3/TR13 | Microchip Technology | 54 | 96.3 | 15.6 | 1500 | -65 to 150 | Active | DO-214AB, SMC |
| SMLJ54A | Bourns Inc. | 54 | 87.1 | 34.4 | 3000 | -55 to 150 | Active | DO-214AB, SMC |
| SMLJ54A-TP | Micro Commercial Co | 54 | 87.1 | 34.4 | 3000 | -55 to 175 | Active | DO-214AB, SMC |
| SMLJ54AE3/TR13 | Microchip Technology | 54 | 87.1 | 34.4 | 300 | -55 to 150 | Active | DO-214AB, SMC |
Engineering Selection Recommendations
For Standard Current Applications (1500W dissipation):
The SMCJ54A series (Meritek, Diodes Incorporated, Micro Commercial Co, Microchip Technology) provides direct electrical equivalence to the SMCJ54 with active product status. All variants maintain the 54V reverse standoff voltage, 87.1V clamping voltage, and 17.2A to 17.3A peak pulse current. SMCJ54A-TP (Micro Commercial Co) and SMCJ54A-TP variants offer extended operating temperature to 175°C, suitable for high-temperature environments. SMCJ54AE3/TR13 (Microchip Technology) extends the lower temperature limit to -65°C for cryogenic applications. All SMCJ54A variants are ROHS3 compliant with MSL 1 rating.
For High-Current Applications (3000W dissipation):
The SMLJ54A series (Bourns Inc., Micro Commercial Co, Microchip Technology) doubles the peak pulse current to 34.4A while maintaining the 54V reverse standoff and 87.1V clamping voltage. SMLJ54A-TP (Micro Commercial Co) provides extended temperature operation to 175°C. Selection of SMLJ54A variants is appropriate when transient energy absorption requirements exceed 1500W or when higher current handling capacity is specified in the application design.
Compliance Considerations:
All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) ratings. Bourns Inc. SMLJ54A carries REACH Affected status; all other variants are REACH Unaffected or REACH Compliant. For applications with REACH-restricted supply chain requirements, select SMCJ54A or SMCJ54A-TP variants.
Frequently Asked Questions (FAQ)
Q: Can SMCJ54A series parts directly replace the obsolete SMCJ54?
A: Yes. SMCJ54A variants from Meritek, Diodes Incorporated, Micro Commercial Co, and Microchip Technology maintain identical reverse standoff voltage (54V), equivalent clamping voltage (87.1V), and comparable peak pulse current (17.2A to 17.3A). All are packaged in DO-214AB (SMC) surface mount configuration with identical pinout and footprint compatibility.
Q: What is the difference between SMCJ54A and SMLJ54A series?
A: The primary difference is peak pulse current and power dissipation. SMCJ54A handles 17.2A to 17.3A at 1500W peak pulse power. SMLJ54A handles 34.4A at 3000W peak pulse power. Both maintain the same 54V reverse standoff and 87.1V clamping voltage. SMLJ54A is selected for applications requiring higher transient energy absorption capacity.
Q: Are there temperature range differences among substitute parts?
A: Yes. Standard variants operate from -55°C to 150°C. SMCJ54A-TP and SMLJ54A-TP (Micro Commercial Co) extend the upper limit to 175°C. SMCJ54AE3/TR13 (Microchip Technology) extends the lower limit to -65°C. Select based on specific application temperature requirements.
Q: Do all substitute parts have the same packaging options?
A: All substitute parts are packaged in DO-214AB (SMC) surface mount configuration. Tape & Reel (TR) packaging is available for SMCJ54A-13-F, SMCJ54A-TP, SMCJ54AE3/TR13, SMCJ54E3/TR13, SMLJ54A, SMLJ54A-TP, and SMLJ54AE3/TR13. Bulk packaging is available for SMLJ54A-TP. Verify packaging availability with supplier for production requirements.
Q: What is the significance of the SMCJ54E3/TR13 variant?
A: SMCJ54E3/TR13 (Microchip Technology) maintains the 54V reverse standoff voltage but features a higher clamping voltage of 96.3V with reduced peak pulse current of 15.6A. This variant is suitable for applications where higher clamping voltage is acceptable and lower current handling is sufficient, providing alternative protection characteristics within the SMCJ54 voltage class.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed are ROHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all variants, indicating no moisture sensitivity restrictions during storage and handling.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts