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SMDJ13CA-T7 Equivalent & Substitute Parts
Part Overview
The SMDJ13CA-T7 is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 13V reverse standoff voltage and provides 21.5V maximum clamping voltage at peak pulse current. The part is active in production and RoHS3 compliant. Substitute parts are identified based on matching electrical characteristics and package compatibility to ensure functional equivalence in circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMDJ13CA-T7 |
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 13V |
| Voltage - Breakdown (Min) | 14.4V |
| Voltage - Clamping (Max) @ Ipp | 21.5V |
| Current - Peak Pulse (10/1000µs) | 139.5A |
| Power - Peak Pulse | 3000W (3kW) |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| Operating Temperature | -65°C ~ 150°C (TJ) |
| RoHS Status | RoHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the SMDJ13CA-T7 are qualified based on the following critical parameters that determine functional equivalence:
- Voltage - Reverse Standoff (Typ): 13V
- Voltage - Breakdown (Min): 14.4V
- Voltage - Clamping (Max) @ Ipp: 21.5V
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener, Bidirectional
All substitute parts listed maintain these core electrical specifications and package compatibility. Variations in peak pulse current (69.8A to 139.5A) and power dissipation (1.5kW to 3kW) reflect different manufacturer designs within the same voltage protection class. Operating temperature ranges vary by manufacturer but remain within acceptable industrial limits.
Parameter Comparison
| Parameter | SMDJ13CA-T7 (Littelfuse) | SMCJ13CA (Fairchild) | SMCJ13CA-E3/57T (Vishay) | SMCJ13CA-TP (MCC) | SMLJ13CA (Bourns) |
|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 13V | 13V | 13V | 13V | 13V |
| Voltage - Breakdown (Min) | 14.4V | 14.4V | 14.4V | 14.4V | 14.4V |
| Voltage - Clamping (Max) @ Ipp | 21.5V | 21.5V | 21.5V | 21.5V | 21.5V |
| Current - Peak Pulse (10/1000µs) | 139.5A | 69.8A | 69.8A | 69.8A | 139.4A |
| Power - Peak Pulse | 3000W (3kW) | 1500W (1.5kW) | 1500W (1.5kW) | 1500W (1.5kW) | 3000W (3kW) |
| Package / Case | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC | DO-214AB, SMC |
| Operating Temperature | -65°C ~ 150°C | -55°C ~ 150°C | -55°C ~ 150°C | -55°C ~ 175°C | -55°C ~ 150°C |
| RoHS Status | RoHS3 Compliant | Not specified | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain the core voltage protection specifications (13V standoff, 21.5V clamping) and DO-214AB package compatibility required for direct circuit substitution.
SMCJ13CA (Fairchild Semiconductor) and SMCJ13CA-E3/57T (Vishay) provide equivalent protection with reduced peak pulse current (69.8A) and power dissipation (1.5kW). These are suitable for applications where the lower power rating is acceptable.
SMCJ13CA-TP (Micro Commercial Co) offers the widest operating temperature range (-55°C ~ 175°C) and maintains RoHS3 compliance, making it suitable for extended temperature environments.
SMLJ13CA (Bourns Inc.) matches the original part's peak pulse current (139.4A) and power dissipation (3kW), providing equivalent performance characteristics. REACH status is affected for this part.
SMDJ13CA-T7 (Littelfuse) maintains the lowest minimum operating temperature (-65°C) among all options, providing the widest temperature margin for cold-environment applications.
Frequently Asked Questions (FAQ)
Q: Can SMCJ13CA (Fairchild) directly replace SMDJ13CA-T7 in all applications?
A: SMCJ13CA maintains identical voltage specifications (13V standoff, 21.5V clamping) and package compatibility (DO-214AB, SMC). However, it has reduced peak pulse current (69.8A vs. 139.5A) and power dissipation (1.5kW vs. 3kW). Substitution is valid only if the application's transient energy does not exceed 1.5kW.
Q: What is the difference between SMLJ13CA and SMDJ13CA-T7?
A: Both parts share identical voltage ratings and package specifications. SMLJ13CA provides equivalent peak pulse current (139.4A) and power dissipation (3kW). The primary difference is manufacturer (Bourns vs. Littelfuse) and REACH status (affected vs. unaffected).
Q: Why do some substitutes have lower peak pulse current ratings?
A: SMCJ13CA variants from Fairchild and Vishay are designed with 69.8A peak pulse current, resulting in 1.5kW power dissipation. These parts provide the same voltage protection but are rated for lower transient energy levels. Selection depends on the actual surge current magnitude in the application circuit.
Q: Is SMCJ13CA-TP suitable for high-temperature applications?
A: SMCJ13CA-TP operates to 175°C junction temperature, the highest among all listed substitutes. This makes it suitable for applications requiring extended temperature operation beyond the standard -55°C ~ 150°C range.
Q: Are all substitute parts RoHS3 compliant?
A: SMDJ13CA-T7, SMCJ13CA-E3/57T, SMCJ13CA-TP, and SMLJ13CA are all RoHS3 compliant. Fairchild's SMCJ13CA does not specify RoHS status in the provided data.
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