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Vishay General Semiconductor - Diodes Division SMCJ40AHM3_A/H
- Part No.:
- SMCJ40AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ40AHM3_A/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
SMCJ40AHM3_A/H 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 (VWM), 64.5 V clamping voltage (VC) at 23.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects MOSFETs, ICs, and sensor signal lines in automotive power systems against inductive switching transients.
For engineers reviewing the SMCJ40AHM3_A/H datasheet, SMCJ40AHM3_A/H pinout, SMCJ40AHM3_A/H application, or SMCJ40AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) for board-level thermal design.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 44.4–49.1 V breakdown range (VBR) at 1 mA test current. Its low incremental surge resistance ensures stable clamping during fast transients, while glass-passivated junction enhances reliability under repetitive surge stress.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. Polarity is marked by a cathode band on the SMC package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 64.5 V - Clamped voltage at 23.3 A 10/1000 µs surge, limiting downstream voltage stress |
| PPPM | 1500 W - Peak surge power handling capability under standardized waveform |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| IFSM | 200 A - Non-repetitive forward surge rating for 8.3 ms half-sine wave, supporting load-dump immunity |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ40AHM3_A/H uses the SMC (DO-214AB) package: a two-terminal, surface-mount plastic case with cathode band marking. Terminals are matte tin-plated, compatible with lead-free reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 40 V rail or sensor input); band-marked end indicates polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Halogen-free & RoHS-compliant | Meets environmental requirements for modern automotive and industrial production without brominated flame retardants |
| Low incremental surge resistance | Enables tighter clamping voltage tolerance across surge current range, improving protection margin |
| Very fast response time | Sub-nanosecond turn-on ensures clamping before sensitive downstream components experience overvoltage |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard 260 °C lead-free reflow profiles |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 40 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges above VWM. Use Value: Limits voltage to ≤64.5 V during 1500 W surges, preventing damage to 48 V-rated DC-DC controllers and microcontrollers. | Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in factory automation PLCs from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected inline with signal traces to shunt transients before reaching ADC front-end. Use Value: Clamps 8 kV contact ESD pulses within nanoseconds while adding <1 pF parasitic capacitance, preserving signal integrity. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding AC/DC adapter primary-side rectifiers and secondary-side 40 V bias rails against lightning-induced surges on telecom infrastructure equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted across bulk capacitor inputs to absorb differential-mode energy. Use Value: Withstands repeated 10/1000 µs surges up to 23.3 A without degradation, ensuring long-term field reliability. | Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters subjected to back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to high-side switch source node to suppress negative transients. Use Value: 200 A IFSM rating supports robustness against repetitive inductive kickback without derating. |
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/H | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs | Suitable only for lower-energy transients; not rated for automotive load dump | Select when space-constrained and surge energy is limited to ≤400 W |
| SMCJ40AHE3_A/H | Same electrical specs but commercial-grade (non-AEC-Q101), non-halogen-free | Lacks automotive qualification and halogen-free certification; identical thermal and clamping behavior | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMCJ40AHM3_A/H, SMAJ40AHE3_A/H offers reduced surge capacity in a smaller footprint, while SMCJ40AHE3_A/H provides identical protection performance without automotive or halogen-free compliance-enabling trade-offs between qualification scope and procurement requirements.
Availability
SMCJ40AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ40AHM3_A/H 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, 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 robustness against load dump, ESD, and lightning surges is critical.
FAQ
What is the clamping voltage of SMCJ40AHM3_A/H at its rated peak pulse current?
The SMCJ40AHM3_A/H has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated 10/1000 µs peak pulse current of 23.3 A. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ40AHM3_A/H maintains this clamping performance across its specified operating temperature range.
Is SMCJ40AHM3_A/H qualified for automotive use?
Yes, SMCJ40AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature operating life, and surge endurance-making the SMCJ40AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics.
What does the "HM3" suffix indicate in SMCJ40AHM3_A/H?
The "HM3" suffix in SMCJ40AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table, HM3 parts meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements. This distinguishes SMCJ40AHM3_A/H from non-halogen variants (e.g., HE3) and non-automotive grades (e.g., E3/M3).
How does the thermal resistance of SMCJ40AHM3_A/H affect PCB layout?
The SMCJ40AHM3_A/H has a typical RθJA of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain junction temperature below 150 °C during 1500 W surges, designers must allocate sufficient copper area and consider thermal vias beneath the SMC pad. Reducing pad size increases RθJA, risking thermal runaway during repetitive events-so the SMCJ40AHM3_A/H requires adherence to Vishay's recommended mounting layout.
Can SMCJ40AHM3_A/H be used in bidirectional configurations?
No, SMCJ40AHM3_A/H is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMCJ40CA). Using SMCJ40AHM3_A/H in bidirectional applications would result in forward conduction during negative transients, potentially causing failure. For symmetrical surge protection, select a verified bidirectional part such as SMCJ40CAHM3_A/H.
SMCJ40AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/H FAQ
1.How can I place an order for SMCJ40AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ40AHM3_A/H 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_A/H reliable?
The price and inventory of SMCJ40AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ40AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ40AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ40AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ40AHM3_A/H?
SMCJ40AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ40AHM3_A/H 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_A/H?
For technical support, including SMCJ40AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ40AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ40AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ40AHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ40AHM3_A/H?
All SMCJ40AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ40AHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMCJ40AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ40AHM3_A/H Tags
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