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Vishay General Semiconductor - Diodes Division SMCJ40AHM3/I
- Part No.:
- SMCJ40AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ40AHM3/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,377
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Product details
Overview
SMCJ40AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 40 V standoff voltage, 64.5 V clamping voltage at 23.3 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning-induced surges in automotive and industrial power electronics.
For engineers reviewing the SMCJ40AHM3/I datasheet, SMCJ40AHM3/I pinout, SMCJ40AHM3/I application, or SMCJ40AHM3/I equivalent, key selection criteria include unidirectional polarity, 1500 W 10/1000 µs surge capability, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance of 75 °C/W junction-to-ambient under standard pad layout.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 40 V reverse standoff voltage (VWM), then rapidly avalanches to limit transient voltages to ≤64.5 V at 23.3 A (10/1000 µs waveform). Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM).
Designed for automated SMT assembly, it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 64.5 V - Clamped voltage across device during 23.3 A 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at rated standoff voltage, critical for low-power sensor line integrity |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm copper pads |
| TJ max | +150 °C - Maximum allowable junction temperature, supporting under-hood automotive use |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin-plated for lead-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection in unidirectional configuration | Connected to protected circuit's positive rail or signal line; conducts avalanche current toward anode during overvoltage |
| Anode | Low-side reference terminal | Typically tied to ground or common return path; completes clamping loop during transient events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial PCB assemblies |
| Low incremental surge resistance | Enables tighter clamping performance and reduced voltage overshoot during fast-rising transients |
| Very fast response time | Sub-nanosecond avalanche turn-on ensures protection before sensitive downstream components experience damage |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life without dry-pack storage, simplifying SMT production logistics |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp negative-going transients and suppress positive spikes up to 1500 W. Use Value: Prevents latch-up or gate oxide failure in microcontrollers and power FETs by limiting voltage excursions to ≤64.5 V during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding PLC analog input channels and digital I/O from inductive kickback when controlling solenoids or contactors. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across signal line and local ground to absorb repetitive 10/1000 µs surges induced by relay switching. Use Value: Maintains signal integrity with <1.0 µA leakage at 40 V, avoiding DC offset errors in precision 4–20 mA loops. |
| Telecom Power Supply Rails | Automotive Sensor Signal Lines |
Use Scenario: Shielding AC/DC adapter outputs and PoE injectors from lightning-induced surges entering via Ethernet or AC mains. IC Role / Device Role / Timing Role: Primary-stage TVS on secondary-side DC output rails to absorb energy before reaching DC-DC converters and LDOs. Use Value: Withstands 1500 W peak pulse power and 23.3 A surge current, enabling single-device protection without cascaded stages. | Use Scenario: Guarding CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with signal trace and grounded at connector side to divert transients before IC pins. Use Value: Glass-passivated junction ensures stable clamping voltage over lifetime, critical for functional safety compliance in ASIL-B systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40AHE3/A | Lower PPPM (400 W), smaller SMA package, same VWM/VBR/VC specs | Not suitable for 1500 W surge environments; limited to lower-energy interfaces like USB or I²C | Select only when board space is constrained and surge threat level is ≤400 W |
| SMCJ40A-M3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101) and standard RoHS (not halogen-free) | Lacks automotive qualification and halogen-free certification required for Tier 1 supply chains | Acceptable for industrial controls where AEC-Q101 and halogen-free are not mandated |
Compared with SMAJ40AHE3/A and SMCJ40A-M3/57T, the SMCJ40AHM3/I uniquely combines 1500 W surge rating, AEC-Q101 qualification, and halogen-free construction-making it the only choice for automotive power electronics requiring full compliance and high-energy robustness.
Availability
SMCJ40AHM3/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive inputs, and telecom power supply rails requiring stable component supply with full AEC-Q101 and halogen-free compliance.
Supply support for SMCJ40AHM3/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where sustained surge immunity and long-term stability are mandatory.
FAQ
What is the clamping voltage of the SMCJ40AHM3/I under maximum surge conditions?
The SMCJ40AHM3/I clamps to 64.5 V when subjected to its rated 23.3 A peak pulse current (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and represents the maximum voltage seen by downstream circuitry during a full 1500 W transient event. The SMCJ40AHM3/I maintains this clamping performance across its operating temperature range and after repeated surges due to its glass-passivated junction structure.
Is the SMCJ40AHM3/I qualified for automotive applications?
Yes, the SMCJ40AHM3/I carries AEC-Q101 qualification, confirmed in Vishay's official documentation and ordering code suffix "HM3" (halogen-free + AEC-Q101). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock-making the SMCJ40AHM3/I suitable for under-hood and chassis-mounted automotive modules requiring functional safety alignment.
How does the SMCJ40AHM3/I differ from the standard SMCJ40A-M3/57T?
The SMCJ40AHM3/I shares identical electrical specifications and SMC package with SMCJ40A-M3/57T but adds AEC-Q101 qualification and halogen-free material compliance. The "HM3" suffix denotes both enhancements, whereas "M3" alone indicates only halogen-free RoHS compliance without automotive qualification. For designs requiring formal automotive approval, the SMCJ40AHM3/I is the validated solution.
What is the maximum reverse leakage current specified for the SMCJ40AHM3/I?
The SMCJ40AHM3/I has a maximum reverse leakage current (ID) of 1.0 µA at its 40 V standoff voltage (VWM), tested at TA = 25 °C. This low leakage ensures minimal loading on high-impedance sensor signal paths and preserves accuracy in precision analog circuits. The SMCJ40AHM3/I maintains this specification across its full -55 °C to +150 °C operating junction temperature range.
Can the SMCJ40AHM3/I be used in bidirectional configurations?
No, the SMCJ40AHM3/I is a unidirectional TVS diode, as indicated by the "A" suffix (versus "CA" for bidirectional variants). Its cathode band identifies polarity, and it conducts only during positive transients relative to the anode. For bidirectional protection-such as AC line or differential bus applications-the SMCJ40CAHM3/I would be required instead. Using the SMCJ40AHM3/I in reverse-biased mode risks permanent damage.
SMCJ40AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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 (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ40AHM3/I FAQ
1.How can I place an order for SMCJ40AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ40AHM3/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCJ40AHM3/I reliable?
The price and inventory of SMCJ40AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ40AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ40AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ40AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ40AHM3/I?
SMCJ40AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ40AHM3/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCJ40AHM3/I?
For technical support, including SMCJ40AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ40AHM3/I requirements.
6.How does Aetrix verify that SMCJ40AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ40AHM3/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCJ40AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ40AHM3/I?
All SMCJ40AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ40AHM3/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCJ40AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ40AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ40AHM3/I Tags
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