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Vishay General Semiconductor - Diodes Division SMCJ12AHE3_A/H
- Part No.:
- SMCJ12AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12AHE3_A/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,493
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Product details
Overview
SMCJ12AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 12 V standoff voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive ECUs, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ12AHE3_A/H datasheet, SMCJ12AHE3_A/H pinout, SMCJ12AHE3_A/H application, or SMCJ12AHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification status, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (12 V) and rapidly transitions to low-impedance conduction above VBR (min. 13.3 V), limiting transient voltages to ≤19.9 V at rated surge current. Its glass-passivated junction ensures stable leakage (<5 μA at VWM) and fast response time (<1.0 ps), critical for protecting MOSFET gates and microcontroller I/O pins against ESD and inductive switching spikes.
The SMCJ12AHE3_A/H is rated for TJ = –55 to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards - enabling reliable automated placement in high-volume automotive and industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - precise breakdown threshold ensuring predictable turn-on behavior |
| VC @ IPPM | 19.9 V at 75.4 A - clamped voltage during 10/1000 μs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient energy handling capacity under standardized surge waveform |
| ID @ VWM | ≤5 μA - ultra-low reverse leakage preserves power rail efficiency and sensor accuracy |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive deployment |
| RθJA | 75 °C/W - thermal resistance enables passive cooling on standard 8 mm × 8 mm copper pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; carries full surge current during clamping |
| Cathode | High-side connection point | Marked with band; connected to protected line (e.g., 12 V rail); defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage performance across lifetime and temperature extremes |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and industrial surge protector classification |
| MSL Level 1 | Zero moisture sensitivity - no baking required prior to reflow, supporting direct SMT production flow |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision for sensitive ICs |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting 12 V supply rail and CAN transceiver power pins from load-dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and LDO regulator input. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to downstream 3.3 V/5 V logic and CAN PHY components. | Use Scenario: Safeguarding 24 V DC digital input circuits against field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input channel before optocoupler or Schmitt trigger. Use Value: Withstands 1500 W surges while maintaining <5 μA leakage, preserving input threshold accuracy and system immunity. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Secondary-side 12 V rail protection in AC/DC adapters subjected to lightning-induced surges on secondary wiring. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output, coordinated with primary-side MOV and fuse. Use Value: Fast clamping (<1 ps) prevents overshoot propagation to downstream DC-DC converters and PMICs. | Use Scenario: Protection of MCU GPIOs and gate drivers from back-EMF generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on motor driver power path and control signal traces. Use Value: 75.4 A IPPM rating handles repetitive motor-switching transients without degradation over 100k+ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost and board space are prioritized over automotive reliability and surge margin. |
| 1.5SMC12A | Same SMC package and 1500 W rating, but non-AEC-Q101 and no UL 497B recognition | Lacks automotive qualification and safety certification; requires additional system-level validation | Choose only for non-automotive designs where Vishay's SMCJ series qualification is not mandated. |
Compared with SMAJ12A-E3/57T and 1.5SMC12A, the SMCJ12AHE3_A/H delivers verified AEC-Q101 compliance, UL 497B listing, and tighter VBR tolerance - making it the preferred choice for safety-critical automotive and industrial systems requiring zero-rework field reliability.
Availability
SMCJ12AHE3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for SMCJ12AHE3_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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, UL recognition, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMCJ12AHE3_A/H under a 10/1000 μs surge?
The SMCJ12AHE3_A/H has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current of 75.4 A using the standard 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ12AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is the SMCJ12AHE3_A/H qualified for automotive applications?
Yes, the SMCJ12AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD - validating its suitability for under-hood and chassis-mounted automotive electronics. The SMCJ12AHE3_A/H also carries UL 497B recognition (file E136766), further supporting its use in certified automotive systems.
What does the "_A/H" suffix in SMCJ12AHE3_A/H indicate?
Per Vishay's ordering information table, the "_A/H" suffix denotes packaging configuration: "H" specifies a 7-inch plastic tape-and-reel format with 850 units per reel, while "A" indicates revision level "A" of the manufacturing lot. This distinguishes it from variants like SMCJ12AHE3_A/I (13-inch reel, 3500 units) and confirms RoHS-compliant, AEC-Q101-qualified construction. The base "HE3" identifies the automotive-grade, halogen-free, matte-tin-plated variant meeting JESD 201 Class 2 whisker resistance.
How does the SMCJ12AHE3_A/H compare to bidirectional TVS diodes like SMCJ12CA?
The SMCJ12AHE3_A/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering lower leakage (<5 μA) and optimized forward conduction characteristics. In contrast, SMCJ12CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485, CAN bus), with symmetrical clamping in both directions but higher leakage at VWM. The SMCJ12AHE3_A/H cannot replace SMCJ12CA in AC-coupled applications without circuit redesign due to polarity dependence and asymmetric IV behavior.
What is the thermal resistance and recommended pad layout for the SMCJ12AHE3_A/H?
The SMCJ12AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This layout is defined in the datasheet's mechanical drawings and is essential to achieve rated power dissipation and prevent thermal runaway during repeated surge events. Deviating from this pad size increases RθJA and reduces safe operating area - the SMCJ12AHE3_A/H must be placed with the cathode band oriented per PCB silkscreen to maintain correct polarity and thermal path integrity.
SMCJ12AHE3_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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 75.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ12AHE3_A/H FAQ
1.How can I place an order for SMCJ12AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12AHE3_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 SMCJ12AHE3_A/H reliable?
The price and inventory of SMCJ12AHE3_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 SMCJ12AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ12AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12AHE3_A/H?
SMCJ12AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12AHE3_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 SMCJ12AHE3_A/H?
For technical support, including SMCJ12AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ12AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ12AHE3_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 SMCJ12AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ12AHE3_A/H?
All SMCJ12AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12AHE3_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 SMCJ12AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ12AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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