Request Quote
(Ships tomorrow)
SMCJ40A-M3/9AT Equivalent & Substitute Parts
Part Overview
The SMCJ40A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 40V reverse standoff category with a 64.5V maximum clamping voltage and 23.3A peak pulse current rating. The device is designed for general-purpose transient voltage suppression applications and is currently in active production status. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from qualified alternatives meeting the same electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SMCJ40A-M3/9AT |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener, Unidirectional |
| Voltage - Reverse Standoff (Typ) | 40V |
| Voltage - Breakdown (Min) | 44.4V |
| Voltage - Clamping (Max) @ Ipp | 64.5V |
| Current - Peak Pulse (10/1000µs) | 23.3A |
| Power - Peak Pulse | 1500W |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C to 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ40A-M3/9AT are qualified based on the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff (Typ): 40V
- Voltage - Breakdown (Min): 44.4V
- Voltage - Clamping (Max) @ Ipp: 64.5V
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional
- RoHS Status: ROHS3 Compliant
Substitution Categories:
Category 1: Direct Electrical & Packaging Equivalents Parts maintaining identical voltage specifications, clamping characteristics, and DO-214AB SMC package form factor. These parts differ only in manufacturer, packaging tape configuration, or minor current rating variations within acceptable tolerance ranges.
Category 2: Higher Power Rated Alternatives Parts with identical voltage parameters and package but elevated peak pulse power ratings (3000W or 5000W). These provide enhanced transient suppression capability and are suitable for applications requiring greater energy dissipation margins.
Category 3: Alternative Manufacturer Sources Parts from different manufacturers meeting the same electrical specifications and package requirements, enabling supply chain flexibility while maintaining functional compatibility.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package / Case | Operating Temperature | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ40A-M3/9AT | Vishay General Semiconductor - Diodes Division | 40V | 44.4V | 64.5V | 23.3A | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMCJ40A-E3/57T | Vishay General Semiconductor - Diodes Division | 40V | 44.4V | 64.5V | 23.3A | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMCJ40A-E3/9AT | Vishay General Semiconductor - Diodes Division | 40V | 44.4V | 64.5V | 23.3A | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMCJ40A | Meritek | 40V | 44.4V | 64.5V | 23.26A | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMCJ40A-13-F | Diodes Incorporated | 40V | 44.4V | 64.5V | 23.2A | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMCJ40A-TR | STMicroelectronics | 40V | 44.4V | 84V | 119A (8/20µs) | 1500W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMLJ40A | Bourns Inc. | 40V | 44.4V | 64.5V | 46.4A | 3000W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMDJ40A | Alpha & Omega Semiconductor Inc. | 40V | 44.4V | 64.5V | 46.6A | 3000W | DO-214AB, SMC | -55°C to 150°C | ROHS3 Compliant |
| SMDJ40A-HR | Littelfuse Inc. | 40V | 44.4V | 64.5V | 46.5A | 3000W | DO-214AB, SMC | -65°C to 150°C | ROHS3 Compliant |
| 5.0SMDJ40A | Taiwan Semiconductor Corporation | 40V | 44.4V | 64.5V | 77.6A | 5000W | DO-214AB, SMC | -55°C to 175°C | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Equivalents (Recommended for 1:1 Replacement)
SMCJ40A-E3/57T and SMCJ40A-E3/9AT from Vishay are direct functional equivalents with identical electrical specifications and packaging. These parts maintain the same 40V reverse standoff, 64.5V clamping voltage, and 23.3A peak pulse current. Selection between these variants depends on tape reel configuration availability and supply chain status. Both are ROHS3 compliant and active production status.
SMCJ40A from Meritek and SMCJ40A-13-F from Diodes Incorporated provide equivalent performance with peak pulse current ratings of 23.26A and 23.2A respectively, representing negligible deviation from the primary part specification. Both maintain identical voltage parameters and DO-214AB SMC packaging.
Higher Power Alternatives (For Enhanced Transient Protection)
SMLJ40A (Bourns), SMDJ40A (Alpha & Omega), and SMDJ40A-HR (Littelfuse) offer 3000W peak pulse power ratings with proportionally increased peak pulse currents (46.4A to 46.6A). These parts maintain identical voltage specifications and package form factor while providing greater energy dissipation capability. SMDJ40A-HR extends the lower operating temperature limit to -65°C.
5.0SMDJ40A from Taiwan Semiconductor Corporation provides the highest power rating at 5000W with 77.6A peak pulse current and extended upper operating temperature to 175°C. This part is suitable for applications requiring maximum transient suppression margin.
Voltage Deviation Note
SMCJ40A-TR from STMicroelectronics exhibits a higher clamping voltage of 84V with significantly elevated peak pulse current of 119A (8/20µs pulse). This part deviates from the primary specification and is suitable only for applications where higher clamping voltage is acceptable.
Compliance & Production Status
All recommended substitute parts maintain ROHS3 compliance and active production status, ensuring long-term availability and regulatory alignment with the primary SMCJ40A-M3/9AT component.
Frequently Asked Questions (FAQ)
Q: Can SMCJ40A-E3/57T replace SMCJ40A-M3/9AT directly?
A: Yes. Both parts are manufactured by Vishay with identical electrical specifications: 40V reverse standoff, 44.4V minimum breakdown voltage, 64.5V maximum clamping voltage, and 23.3A peak pulse current. The difference is tape reel configuration. Both are ROHS3 compliant and in active production.
Q: What is the difference between 1500W and 3000W rated parts?
A: Peak pulse power rating indicates the maximum energy the device can dissipate during a transient event. 3000W parts (SMLJ40A, SMDJ40A, SMDJ40A-HR) provide double the energy dissipation capability compared to 1500W parts. Selection depends on application transient energy requirements. Voltage specifications remain identical.
Q: Is SMCJ40A-TR a suitable substitute?
A: SMCJ40A-TR differs in clamping voltage (84V versus 64.5V) and peak pulse current (119A versus 23.3A). This part is not a direct equivalent and is suitable only for applications where higher clamping voltage is acceptable or required.
Q: Can I use 5.0SMDJ40A in place of SMCJ40A-M3/9AT?
A: 5.0SMDJ40A maintains identical voltage specifications (40V reverse standoff, 64.5V clamping) and DO-214AB SMC packaging. The primary differences are 5000W peak pulse power rating and extended upper operating temperature to 175°C. This part is suitable for applications requiring enhanced transient protection margin.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory alignment with the primary SMCJ40A-M3/9AT component.
Q: What is the significance of operating temperature range differences?
A: SMDJ40A-HR extends the lower operating temperature to -65°C compared to -55°C for most alternatives. 5.0SMDJ40A extends the upper limit to 175°C. Selection depends on application thermal environment requirements.
Q: Do all parts use the same DO-214AB SMC package?
A: Yes. All listed substitute parts use the DO-214AB SMC surface mount package, ensuring mechanical and footprint compatibility with the primary SMCJ40A-M3/9AT component.
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