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SMCJ6.5C Equivalent & Substitute Parts
Part Overview
The SMCJ6.5C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 6.5V reverse standoff voltage, 11.76V maximum clamping voltage, and 134A peak pulse current capability in a DO-214AB (SMC) package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Reverse Standoff Voltage (Typ) | 6.5 | V |
| Breakdown Voltage (Min) | 6.84 | V |
| Clamping Voltage (Max) @ Ipp | 11.76 | V |
| Peak Pulse Current (10/1000µs) | 134 | A |
| Peak Pulse Power | 1500 | W |
| Operating Temperature Range | -55 to 150 | °C |
| Package Type | DO-214AB (SMC) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution for the SMCJ6.5C is determined by the following critical parameters:
- Reverse Standoff Voltage: Must be 6.5V (typ)
- Clamping Voltage Range: 11.2V to 12.3V maximum @ Ipp (acceptable variation from original 11.76V)
- Peak Pulse Current: 133.9A to 134A (standard SMCJ series) or 267.9A (SMLJ series with higher power rating)
- Peak Pulse Power: 1500W (SMCJ) or 3000W (SMLJ)
- Package: DO-214AB / SMC surface mount
- Temperature Range: -55°C to 150°C minimum (extended ranges acceptable)
- Compliance: ROHS3 compliant
Substitute parts are grouped into two categories:
Category 1 - Direct Electrical Equivalents (SMCJ Series): Parts with 134A peak pulse current and 1500W power rating. These include SMCJ6.5CA, SMCJ6.5CA-TP, SMCJ6.5CAE3/TR13, and SMCJ6V5CA. Clamping voltages range from 11.2V to 11.2V.
Category 2 - Higher Power Alternatives (SMLJ Series): Parts with 267.9A peak pulse current and 3000W power rating. These include SMLJ6.5CA and SMLJ6.5CA-TP. These provide enhanced transient suppression capability while maintaining the same voltage specifications.
Category 3 - Variant Clamping Voltage (SMCJ6.5CE3/TR13): Part with 12.3V clamping voltage and 122A peak pulse current, suitable for applications tolerating slightly higher clamping levels.
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Breakdown Min (V) | Clamping Max @ Ipp (V) | Peak Pulse Current (A) | Peak Pulse Power (W) | Temp Range (°C) | Product Status |
|---|---|---|---|---|---|---|---|---|
| SMCJ6.5C | Littelfuse Inc. | 6.5 | 6.84 | 11.76 | 134 | 1500 | -55 to 150 | Obsolete |
| SMCJ6.5CA | EVVO Semi | 6.5 | 7.22 | 11.2 | 134 | 1500 | -55 to 150 | Active |
| SMCJ6.5CA-13-F | Diodes Incorporated | 6.5 | 7.22 | 11.2 | 133.9 | 1500 | -55 to 150 | Active |
| SMCJ6.5CA-TP | Micro Commercial Co | 6.5 | 7.2 | 11.2 | 134 | 1500 | -55 to 175 | Active |
| SMCJ6.5CAE3/TR13 | Microchip Technology | 6.5 | 7.22 | 11.2 | 133.9 | 1500 | -65 to 150 | Active |
| SMCJ6.5CE3/TR13 | Microchip Technology | 6.5 | 7.22 | 12.3 | 122 | 1500 | -65 to 150 | Active |
| SMCJ6V5CA | Taiwan Semiconductor Corporation | 6.5 | 7.22 | 11.2 | 133.9 | 1500 | Not specified | Active |
| SMLJ6.5CA | Bourns Inc. | 6.5 | 7.22 | 11.2 | 267.9 | 3000 | -55 to 150 | Active |
| SMLJ6.5CA-TP | Micro Commercial Co | 6.5 | 7.22 | 11.2 | 267.9 | 3000 | -55 to 175 | Active |
| SMLJ6.5CAE3/TR13 | Microchip Technology | 6.5 | 7.22 | 11.2 | 267.9 | 300 | -55 to 150 | Active |
Engineering Selection Recommendations
Primary Substitutes (Direct Replacement)
SMCJ6.5CA (EVVO Semi), SMCJ6.5CA-TP (Micro Commercial Co), and SMCJ6.5CAE3/TR13 (Microchip Technology) are the preferred direct replacements. All three maintain the 6.5V reverse standoff voltage, 11.2V clamping voltage, 134A peak pulse current, and 1500W power rating. All are ROHS3 compliant and active products with established supply chains. SMCJ6.5CA-TP and SMLJ6.5CA-TP offer extended operating temperature ranges to 175°C, suitable for high-temperature applications.
Higher Power Alternative
SMLJ6.5CA (Bourns Inc.) and SMLJ6.5CA-TP (Micro Commercial Co) provide doubled peak pulse current (267.9A) and power rating (3000W) while maintaining identical voltage specifications. These are suitable for applications requiring enhanced transient suppression capability or where circuit margins demand higher current handling.
Variant Clamping Voltage Option
SMCJ6.5CE3/TR13 (Microchip Technology) features a 12.3V clamping voltage with reduced peak pulse current (122A). This part is appropriate only for applications where the higher clamping voltage is acceptable and peak pulse current requirements do not exceed 122A.
Compliance and Availability
All substitute parts are ROHS3 compliant. SMCJ6.5CA (EVVO Semi) offers the highest inventory availability at 38,100 units. SMLJ6.5CA-TP (Micro Commercial Co) provides 6,071 units with extended temperature range. Selection should prioritize active product status and supply chain stability for production continuity.
Frequently Asked Questions (FAQ)
Q: Can SMLJ6.5CA replace SMCJ6.5C in all applications?
A: SMLJ6.5CA maintains identical voltage specifications (6.5V standoff, 11.2V clamping) but provides doubled peak pulse current (267.9A vs. 134A) and power rating (3000W vs. 1500W). It is electrically compatible and suitable for all SMCJ6.5C applications. The higher current and power ratings provide additional design margin without negative effects.
Q: What is the difference between SMCJ6.5CA and SMCJ6.5CA-TP?
A: Both parts share identical electrical specifications (6.5V standoff, 11.2V clamping, 134A peak current, 1500W power). SMCJ6.5CA-TP offers an extended operating temperature range to 175°C compared to the standard 150°C. Selection depends on application temperature requirements.
Q: Is SMCJ6.5CE3/TR13 a suitable substitute?
A: SMCJ6.5CE3/TR13 maintains the 6.5V standoff voltage but features a higher clamping voltage (12.3V vs. 11.2V) and lower peak pulse current (122A vs. 134A). It is suitable only for applications where the higher clamping voltage is acceptable and peak current does not exceed 122A.
Q: Why is the original SMCJ6.5C obsolete?
A: The SMCJ6.5C is listed as obsolete by Littelfuse Inc. Multiple active alternatives from established manufacturers (EVVO Semi, Diodes Incorporated, Micro Commercial Co, Microchip Technology, Bourns Inc., Taiwan Semiconductor Corporation) provide equivalent or superior electrical performance with current production support.
Q: Are all substitute parts available in the same package?
A: All substitute parts use the DO-214AB (SMC) surface-mount package, ensuring mechanical and thermal compatibility with the original SMCJ6.5C. Packaging formats vary (Cut Tape, Digi-Reel, Tape & Reel) but do not affect electrical performance or PCB mounting.
Q: What compliance certifications apply to substitute parts?
A: All substitute parts are ROHS3 compliant. REACH status varies by manufacturer: EVVO Semi, Diodes Incorporated, Micro Commercial Co, and Microchip Technology parts are REACH Unaffected or REACH Affected. Verify specific REACH requirements for your application and supply chain.
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