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Vishay General Semiconductor - Diodes Division SMCJ7.5AHM3/H
- Part No.:
- SMCJ7.5AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5AHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,681
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Product details
Overview
SMCJ7.5AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 12.9 V maximum clamping voltage at 116.3 A IPPM, 7.5 V stand-off voltage, and 8.33–9.21 V breakdown voltage range - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the SMCJ7.5AHM3/H datasheet, SMCJ7.5AHM3/H pinout, SMCJ7.5AHM3/H application, or SMCJ7.5AHM3/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance, 1500 W 10/1000 µs surge rating, and thermal resistance of 75 °C/W junction-to-ambient - critical for high-reliability 12 V system protection designs.
Technical Context
The SMCJ7.5AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to clamp transient overvoltages before downstream components are damaged. Its breakdown voltage is specified at 1 mA test current, with 7.5 V stand-off voltage ensuring compatibility with standard 12 V nominal supply rails.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling operation up to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - verified per JESD201 Class 2 whisker testing and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage; sets upper limit for reliable blocking in 12 V systems without leakage-induced power loss. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - defines guaranteed avalanche conduction onset window; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 12.9 V at 116.3 A - clamping voltage under 10/1000 µs surge; limits stress on protected ICs to safe levels during load dump or inductive switching. |
| PPPM | 1500 W - peak pulse power handling capability; supports robust protection against ISO 7637-2 Pulse 5a (load dump) events. |
| ID @ VWM | 100 µA - maximum reverse leakage at 7.5 V; negligible current draw in standby, preserving battery life in always-on automotive modules. |
| TJ max | +150 °C - maximum junction temperature; enables deployment in under-hood environments and high-power-density PCB layouts. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports automated placement and reflow. |
Pinout & Package
SMCJ7.5AHM3/H uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two leads, cathode indicated by a band. Leads are matte tin-plated and solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to ground or low-side return path; completes clamping loop when transient exceeds VBR. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS-compliant (HM3) | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing. |
| Low incremental surge resistance | Enables tighter clamping (VC = 12.9 V) at high surge currents - reduces voltage overshoot seen by protected ICs during fast transients. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-throughput SMT assembly lines using peak temperatures up to 260 °C. |
| Glass passivated junction | Provides stable, repeatable avalanche characteristics over lifetime and temperature - prevents parameter drift in harsh thermal environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V power distribution networks in engine control modules against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC input, clamping surges within nanoseconds. Use Value: Limits peak voltage to ≤12.9 V during 116 A transients, preventing damage to automotive-grade microcontrollers and power management ICs. |
Use Scenario: Safeguarding analog output lines of pressure or temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-mode protector on 0–10 V or 4–20 mA signal paths, absorbing inductive kickback without affecting baseline accuracy. Use Value: Maintains <100 µA leakage at 7.5 V, avoiding signal offset errors while clamping spikes to <13 V - preserving ADC resolution and calibration integrity. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
|
Use Scenario: Secondary-side overvoltage suppression in universal-input AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Fast-acting shunt device across bulk capacitor, triggered only during abnormal line surges or regulator failure. Use Value: Withstands 1500 W pulses without degradation, enabling compact design without sacrificial fusing or redundant clamping stages. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeding lines in outdoor installations. IC Role / Device Role / Timing Role: Primary-level TVS on PSE-side feed line, coordinated with upstream GDT or MOV for multi-stage surge coordination. Use Value: Matches 48 V system VWM margin with 7.5 V standoff headroom, enabling precise coordination with higher-voltage secondary protectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint), same VWM/VBR range, AEC-Q101 qualified (HE3). | Targeted at space-constrained consumer electronics with lower surge exposure; not suitable for automotive load dump. | Select when board area is limited and surge energy does not exceed 400 W - verify thermal derating for ambient >85 °C. |
| SMCJ7.5A-E3/57T | Same electrical specs and SMC package, but commercial-grade (E3), non-AEC-Q101, RoHS-compliant only (not halogen-free). | Applicable in industrial controls or computing where automotive qualification is unnecessary and halogen content is unrestricted. | Choose for cost-sensitive non-automotive designs requiring identical clamping performance and layout compatibility. |
Compared with SMCJ7.5AHM3/H, SMAJ7.5AHE3/A offers smaller size but reduced surge capacity, while SMCJ7.5A-E3/57T matches form-factor and clamping but lacks AEC-Q101 validation and halogen-free assurance - making SMCJ7.5AHM3/H the sole option meeting full automotive production requirements.
Availability
SMCJ7.5AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeding circuits, and consumer adapter input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.5AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed for high-energy transient suppression in automotive and industrial power systems, prioritizing AEC-Q101 qualification, robust thermal performance, and standardized SMC packaging for automated manufacturing.
FAQ
What is the clamping voltage of the SMCJ7.5AHM3/H under maximum surge conditions?
The SMCJ7.5AHM3/H has a maximum clamping voltage (VC) of 12.9 V at 116.3 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMCJ7.5AHM3/H qualified for automotive applications?
Yes, the SMCJ7.5AHM3/H is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's 88394 datasheet. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock - making it suitable for engine control units, body control modules, and other under-hood or chassis-mounted automotive electronics.
What does the "HM3" suffix indicate in SMCJ7.5AHM3/H?
The "HM3" suffix in SMCJ7.5AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It specifies compliance with JESD201 Class 2 whisker testing, MSL Level 1 reflow capability (260 °C peak), and absence of brominated flame retardants - distinguishing it from commercial-grade E3 or HE3 variants.
Can the SMCJ7.5AHM3/H be used in bidirectional configurations?
No, the SMCJ7.5AHM3/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and presence of cathode band marking. Bidirectional operation requires the CA variant (e.g., SMCJ7.5CA), which lacks polarity marking and exhibits symmetric breakdown in both directions - using SMCJ7.5AHM3/H in bidirectional circuits would result in forward conduction during negative transients.
What is the thermal resistance of the SMCJ7.5AHM3/H, and how does it affect PCB layout?
The SMCJ7.5AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To maintain safe operation at full 1500 W surge rating, the datasheet specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - undersized pads will cause excessive junction temperature rise and potential parametric shift or failure.
SMCJ7.5AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- 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)
SMCJ7.5AHM3/H FAQ
1.How can I place an order for SMCJ7.5AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5AHM3/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 SMCJ7.5AHM3/H reliable?
The price and inventory of SMCJ7.5AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ7.5AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5AHM3/H?
SMCJ7.5AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5AHM3/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 SMCJ7.5AHM3/H?
For technical support, including SMCJ7.5AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5AHM3/H requirements.
6.How does Aetrix verify that SMCJ7.5AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5AHM3/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 SMCJ7.5AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ7.5AHM3/H?
All SMCJ7.5AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5AHM3/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 SMCJ7.5AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ7.5AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5AHM3/H Tags
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