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Vishay General Semiconductor - Diodes Division SMCJ75AHM3/I
- Part No.:
- SMCJ75AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AHM3/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,461
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Product details
Overview
SMCJ75AHM3/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 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 μs waveform. It clamps transients to ≤121 V at 12.4 A peak pulse current and operates from –55 °C to +150 °C, commonly used to protect automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMCJ75AHM3/I datasheet, SMCJ75AHM3/I pinout, SMCJ75AHM3/I application, or SMCJ75AHM3/I equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (HM3 suffix), AEC-Q101 qualification, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ75AHM3/I employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance to maintain stable clamping under repetitive surges. Its unidirectional configuration provides cathode-marked polarity for DC-biased lines, with reverse leakage limited to 1.0 μA at 75 V standoff.
Thermally, it features RθJL = 15 °C/W junction-to-lead resistance and is rated for 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), enabling robust protection in automotive power distribution systems where load dump and ISO 7637-2 pulses are present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR min/max | 83.3 V / 92.1 V at 1.0 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 121 V at 12.4 A - Clamping voltage under 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted. |
| TJ max | +150 °C - Maximum junction temperature rating enables use in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance to ambient on standard PCB pad layout; informs derating above 25 °C ambient. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
SMCJ75AHM3/I uses the SMC (DO-214AB) package: a two-terminal surface-mount device with cathode indicated by a band on one end. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; forms current path during reverse-biased clamping event. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail); marked with band; conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier-1 automotive suppliers and industrial OEMs without compromising surge performance. |
| Low incremental surge resistance | Enables tighter clamping voltage window (VC − VBR ≈ 38 V), reducing voltage overshoot on sensitive 75 V-rated components. |
| MSL level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile usage without baking, simplifying SMT manufacturing flow. |
| Glass passivated junction | Provides stable leakage and breakdown characteristics across temperature and lifetime, critical for long-term reliability in harsh environments. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges above 75 V. Use Value: Limits peak voltage to ≤121 V, preventing damage to microcontrollers and CAN transceivers rated for 125 V absolute maximum. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Standoff protection device on signal line referenced to local ground, absorbing ESD and inductive switching spikes. Use Value: 1.0 μA leakage at 75 V ensures minimal impact on high-impedance sensor output accuracy while delivering 1500 W surge absorption. |
| Telecom DC Power Input | Consumer Appliance Motor Drive Supply |
Use Scenario: Secondary-side surge suppression on 48 V PoE-powered equipment inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of DC/DC converters and PMICs. Use Value: 121 V clamping voltage allows sufficient headroom below 150 V converter input ratings while maintaining fast <1 ns response. | Use Scenario: Protecting BLDC motor driver ICs from back-EMF spikes generated during commutation in smart home appliances. IC Role / Device Role / Timing Role: Unidirectional suppressor tied between motor supply rail and ground plane to absorb inductive kickback. Use Value: 200 A IFSM rating withstands repeated motor startup currents without degradation, supporting >100,000-cycle reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR range. | Not suitable for 1500 W surge events; limited to lower-energy IEC 61000-4-2 ESD or localized switching noise. | Select only if space-constrained and surge energy is confirmed ≤400 W. |
| SMCJ75A-M3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101) and halogen-free (M3), no automotive qualification. | Lacks automotive reliability validation; acceptable for industrial or consumer use where AEC-Q101 is not mandated. | Choose when cost sensitivity outweighs automotive qualification requirement. |
Compared with SMCJ75AHM3/I, SMAJ75AHE3/A offers smaller size but sacrifices 73% surge power handling and thermal performance, while SMCJ75A-M3/57T matches form/fit/function but omits AEC-Q101 validation-making SMCJ75AHM3/I the sole choice for production automotive designs requiring both 1500 W capability and qualification traceability.
Availability
SMCJ75AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, telecom power supplies, and consumer appliance motor drives requiring stable component supply with full AEC-Q101 documentation and halogen-free compliance.
Supply support for SMCJ75AHM3/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 was developed specifically for high-power transient suppression in automotive and industrial environments, targeting robustness against ISO 7637-2, IEC 61000-4-5, and ESD IEC 61000-4-2 threats while meeting stringent automotive qualification and environmental standards.
FAQ
What is the clamping voltage of the SMCJ75AHM3/I under a 10/1000 µs surge?
The SMCJ75AHM3/I clamps to a maximum of 121 V when subjected to its rated 12.4 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured at the device terminals with standard mounting on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SMCJ75AHM3/I suitable for automotive applications?
Yes, the SMCJ75AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It meets stress test requirements for temperature cycling, humidity bias, mechanical shock, and surge endurance-making it appropriate for engine control, body electronics, and ADAS power rail protection where SMCJ75AHM3/I must operate continuously at up to +150 °C junction temperature.
What does the "HM3" suffix mean in SMCJ75AHM3/I?
The "HM3" suffix in SMCJ75AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., M3) and non-halogen-free automotive variants (HE3), confirming compliance with automotive material restrictions and reliability validation-critical for Tier-1 supply chain traceability and long-term deployment in vehicles.
How does the SMCJ75AHM3/I compare to bidirectional TVS diodes like SMCJ75CA?
The SMCJ75AHM3/I is unidirectional and intended for DC-biased lines where only positive transients relative to ground require suppression. In contrast, SMCJ75CA is bidirectional and protects AC-coupled or floating signals from both polarities. The SMCJ75AHM3/I exhibits 1.0 μA leakage at 75 V, whereas SMCJ75CA has double the leakage (2.0 μA) for VWM ≤ 10 V-but for 75 V, both specify 1.0 μA. Pinout and package are identical, but polarity marking differs (band vs. no band).
What PCB layout guidance applies to the SMCJ75AHM3/I for optimal surge performance?
For optimal surge performance, the SMCJ75AHM3/I must be mounted on minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, with short, low-inductance traces to ground. Thermal relief should be minimized to ensure RθJA ≈ 75 °C/W; avoid routing sensitive signals near its anode/cathode paths; and place it as close as possible to the connector or IC input being protected to reduce parasitic inductance that degrades clamping speed.
SMCJ75AHM3/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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCJ75AHM3/I FAQ
1.How can I place an order for SMCJ75AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AHM3/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 SMCJ75AHM3/I reliable?
The price and inventory of SMCJ75AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ75AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AHM3/I?
SMCJ75AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AHM3/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 SMCJ75AHM3/I?
For technical support, including SMCJ75AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AHM3/I requirements.
6.How does Aetrix verify that SMCJ75AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ75AHM3/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 SMCJ75AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ75AHM3/I?
All SMCJ75AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AHM3/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 SMCJ75AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ75AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75AHM3/I Tags
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