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SMDJ8.0C Equivalent & Substitute Parts
Part Overview
The SMDJ8.0C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with an 8V reverse standoff voltage and provides 14.28V maximum clamping voltage at peak pulse current of 220.6A, delivering 3000W peak pulse power dissipation in a DO-214AB (SMC) package.
The SMDJ8.0C is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering comparable electrical performance and identical mechanical compatibility for direct board-level replacement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 8 | V |
| Voltage - Breakdown (Min) | 8.42 | V |
| Voltage - Clamping (Max) @ Ipp | 14.28 | V |
| Current - Peak Pulse (10/1000µs) | 220.6 | A |
| Power - Peak Pulse | 3000 | W |
| Bidirectional Channels | 1 | — |
| Type | Zener | — |
| Package / Case | DO-214AB, SMC | — |
| Operating Temperature Range | -65 to 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SMDJ8.0C is determined by the following critical parameters:
- Voltage - Reverse Standoff: Must be 8V (±0V tolerance for direct substitution)
- Voltage - Clamping (Max) @ Ipp: Must be within 13.6V to 14.28V range
- Current - Peak Pulse (10/1000µs): Must be ≥110.3A minimum; 220.6A preferred for full power rating equivalence
- Power - Peak Pulse: Must be ≥1500W minimum; 3000W preferred for full equivalence
- Package / Case: Must be DO-214AB (SMC) for mechanical and thermal compatibility
- Bidirectional Channels: Must be 1 channel
- Type: Must be Zener TVS diode
- Mounting Type: Must be Surface Mount
- RoHS Status: Must be ROHS3 Compliant
Parts meeting all critical parameters are classified as direct substitutes. Parts meeting voltage and package requirements but with reduced peak pulse current or power ratings are classified as functional substitutes with application-dependent suitability.
Parameter Comparison
| Manufacturer 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 |
|---|---|---|---|---|---|---|---|---|
| SMDJ8.0C | Littelfuse Inc. | 8 | 14.28 | 220.6 | 3000 | -65 to 150 | Obsolete | DO-214AB (SMCJ) |
| SMDJ8.0CA | Alpha & Omega Semiconductor Inc. | 8 | 13.6 | 220.6 | 3000 | -55 to 150 | Active | DO-214AB |
| SMCJ8.0CA | Taiwan Semiconductor Corporation | 8 | 13.6 | 115 | 1500 | -55 to 150 | Active | DO-214AB (SMC) |
| SMCJ8.0CA-TP | Micro Commercial Co | 8 | 13.6 | 110.3 | 1500 | -55 to 175 | Active | DO-214AB (SMC) |
| SMCJ8.0CAE3/TR13 | Microchip Technology | 8 | 13.6 | 110.3 | 1500 | -65 to 150 | Active | DO-214AB (SMCJ) |
| SMLJ8.0CA | Bourns Inc. | 8 | 13.6 | 220.6 | 3000 | -55 to 150 | Active | DO-214AB (SMC) |
| SMLJ8.0CA-TP | Micro Commercial Co | 8 | 13.6 | 220.6 | 3000 | -55 to 175 | Active | DO-214AB (SMC) |
| SMLJ8.0CAE3/TR13 | Microchip Technology | 8 | 13.6 | 220.6 | 300 | -55 to 150 | Active | DO-214AB |
| TV15C8V0JB-G | Comchip Technology | 8 | 13.6 | 110.29 | 1500 | -55 to 150 | Active | DO-214AB (SMC) |
Engineering Selection Recommendations
Direct Equivalents (Full Performance Match)
SMDJ8.0CA, SMLJ8.0CA, and SMLJ8.0CA-TP provide complete electrical and mechanical equivalence to the SMDJ8.0C. All three maintain 8V reverse standoff voltage, 220.6A peak pulse current, and 3000W peak pulse power dissipation. All are ROHS3 compliant and active products. SMDJ8.0CA and SMLJ8.0CA operate within -55°C to 150°C, while SMLJ8.0CA-TP extends to -55°C to 175°C. The SMDJ8.0C operates from -65°C; substitutes with -55°C minimum temperature are suitable for applications not requiring sub-55°C operation.
Functional Substitutes (Reduced Peak Pulse Rating)
SMCJ8.0CA, SMCJ8.0CA-TP, SMCJ8.0CAE3/TR13, and TV15C8V0JB-G maintain 8V reverse standoff voltage and 13.6V clamping voltage but operate at reduced peak pulse current (110.3A to 115A) and 1500W peak pulse power. These parts are suitable for applications where peak pulse current does not exceed 115A. All are ROHS3 compliant and active products.
Not Recommended
SMLJ8.0CAE3/TR13 exhibits a power rating of 300W, which deviates significantly from the 3000W specification and does not meet the substitution criteria for this application.
All recommended substitutes are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete SMDJ8.0C.
Frequently Asked Questions (FAQ)
Q: Can SMCJ8.0CA replace SMDJ8.0C directly on the PCB?
A: SMCJ8.0CA is mechanically compatible (DO-214AB package) and electrically compatible for the 8V voltage class. However, it operates at 115A peak pulse current versus the original 220.6A. Direct replacement is suitable only if your application peak pulse current does not exceed 115A. For applications requiring full 220.6A capability, use SMDJ8.0CA or SMLJ8.0CA instead.
Q: What is the difference between SMDJ8.0CA and SMLJ8.0CA?
A: Both parts provide identical electrical performance: 8V reverse standoff, 13.6V clamping, 220.6A peak pulse current, and 3000W power dissipation. The primary difference is manufacturer (Alpha & Omega Semiconductor vs. Bourns Inc.). Both are active products and ROHS3 compliant. Selection can be based on supplier availability and lead time.
Q: Why do some substitutes have lower peak pulse current ratings?
A: SMCJ series parts (115A) and TV15C8V0JB-G (110.29A) are designed for applications with lower transient energy requirements. The SMLJ and SMDJ series (220.6A) are rated for higher energy transients. Verify your application's peak pulse current specification before selecting a reduced-rating substitute.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All recommended substitute parts carry ROHS3 Compliant status, matching the original SMDJ8.0C specification. This ensures compliance with environmental and regulatory requirements.
Q: What is the temperature range consideration for substitution?
A: The SMDJ8.0C operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C, which is suitable for standard industrial applications. SMCJ8.0CA-TP and SMLJ8.0CA-TP extend to 175°C maximum, providing additional thermal margin. Select based on your application's minimum operating temperature requirement.
Q: Can I use SMLJ8.0CAE3/TR13 as a substitute?
A: SMLJ8.0CAE3/TR13 is not recommended. While it matches the 8V voltage class and package, its 300W peak pulse power rating is significantly below the 3000W requirement, making it unsuitable for this application.
Q: What packaging options are available for substitutes?
A: Substitute parts are available in Tape & Reel (TR) and Bulk packaging. SMDJ8.0CA, SMCJ8.0CAE3/TR13, SMLJ8.0CA, SMLJ8.0CAE3/TR13, and TV15C8V0JB-G are offered in Tape & Reel format for automated assembly. SMCJ8.0CA and SMLJ8.0CA-TP are available in standard packaging. Verify packaging compatibility with your assembly process.
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