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Vishay General Semiconductor - Diodes Division SMCJ12CAHE3_A/H
- Part No.:
- SMCJ12CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12CAHE3_A/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,766
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Product details
Overview
SMCJ12CAHE3_A/H from Vishay General Semiconductor is a bidirectional 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 19.9 V maximum clamping voltage at 75.4 A peak pulse current and 12 V standoff voltage. It protects sensitive ICs and MOSFETs in automotive power supplies and industrial sensor interfaces.
For engineers reviewing the SMCJ12CAHE3_A/H datasheet, SMCJ12CAHE3_A/H pinout, SMCJ12CAHE3_A/H application, or SMCJ12CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, 12 V working voltage, and SMC package compatibility with automated PCB assembly.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering consistent clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5 µA at 12 V), while the low incremental surge resistance enables effective energy diversion during fast 10/1000 µs transients.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification confirms suitability for automotive electronics where reliability under thermal cycling and mechanical stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy surges without failure in automotive load-dump or inductive switching events |
| Standoff Voltage (VWM) | 12 V - blocks normal operating voltages up to 12 V while remaining non-conductive |
| Clamping Voltage (VC) | 19.9 V at 75.4 A - limits transient voltage seen by downstream circuitry to ≤19.9 V during worst-case surge |
| Breakdown Voltage (VBR) | 13.3–14.7 V at 1 mA - defines precise conduction onset threshold for reliable overvoltage triggering |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement for 6.5 W dissipation |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
Pinout & Package
SMCJ12CAHE3_A/H uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two coplanar matte tin-plated terminals. No polarity marking is present on bidirectional variants; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Reversible transient conduction path | Either terminal serves as anode or cathode depending on transient polarity - no DC bias dependency |
| Case / Body | Non-electrical mechanical interface | No internal connection; provides mechanical mounting and thermal path via soldered pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Confirms robustness for automotive powertrain and body electronics requiring zero field failures |
| 1500 W peak pulse rating | Handles ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events without degradation |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes voltage overshoot during clamping - critical for protecting 12 V logic and analog front-ends |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking, reducing manufacturing cost and handling complexity |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V supply rails in engine control units against load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤19.9 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream silicon. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended sensor outputs. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response, preserving signal integrity below 12 V full-scale range. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge suppression on Ethernet PHY power pins exposed to lightning-induced surges in outdoor PoE switches. IC Role / Device Role / Timing Role: Secondary-level transient suppressor after primary gas discharge tube. Use Value: Provides low-clamp backup protection with 19.9 V VC, ensuring PHY ICs survive residual 10/1000 µs surges up to 75 A. |
Use Scenario: Input-stage protection in universal AC/DC adapters subjected to mains-borne surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Fast-acting clamp parallel to bulk input capacitor. Use Value: Diverts >90% of 1.2/50 µs surge energy before it reaches bridge rectifier and controller IC, extending adapter lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC12CA | Same 12 V VWM and bidirectional configuration, but lower 1000 W PPPM rating and TO-220AC package | Requires through-hole mounting and heatsinking; unsuitable for high-density SMT designs | Select when board space allows larger footprint and higher thermal mass is needed for repeated surge duty |
| SMCJ12CAHM3_A/H | Identical electrical specs and SMC package, but halogen-free and RoHS-compliant without AEC-Q101 qualification | Lacks automotive qualification; limited to commercial/industrial use where AEC compliance is not mandated | Select for cost-sensitive consumer or industrial applications where automotive reliability testing is unnecessary |
Compared with SMCJ12CAHE3_A/H, SAC12CA trades SMT compatibility and surge capacity for thermal robustness in legacy layouts, while SMCJ12CAHM3_A/H offers identical form-factor protection without automotive validation-making the HE3 variant the only choice for AEC-Q101–mandated vehicle subsystems.
Availability
SMCJ12CAHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line protection, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ12CAHE3_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 and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom systems needing AEC-Q101–validated, high-power TVS solutions in compact SMC packages.
FAQ
What is the clamping voltage of SMCJ12CAHE3_A/H at its rated peak pulse current?
The SMCJ12CAHE3_A/H has a maximum clamping voltage (VC) of 19.9 V at 75.4 A peak pulse current (IPPM), measured under standardized 10/1000 µs waveform conditions. This value ensures protected circuits experience no more than 19.9 V during worst-case transients, making SMCJ12CAHE3_A/H suitable for safeguarding 12 V systems with tight voltage margins.
Is SMCJ12CAHE3_A/H suitable for automotive applications?
Yes, SMCJ12CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3". It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock, confirming reliability in engine control, body electronics, and ADAS modules where field failure is unacceptable.
How does the bidirectional design of SMCJ12CAHE3_A/H affect its circuit placement?
The bidirectional nature of SMCJ12CAHE3_A/H eliminates polarity constraints: it can be placed across any two nodes without regard to orientation, simplifying layout for AC-coupled signals, differential buses, or floating power domains. Unlike unidirectional TVS diodes, SMCJ12CAHE3_A/H requires no cathode band alignment during placement.
What is the thermal resistance of SMCJ12CAHE3_A/H, and how does it impact PCB layout?
SMCJ12CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under 6.5 W continuous dissipation, designers must adhere to this pad layout - undersized pads will cause excessive thermal rise and premature failure.
Does SMCJ12CAHE3_A/H meet industry surge immunity standards?
Yes, SMCJ12CAHE3_A/H is rated for 1500 W peak pulse power per 10/1000 µs waveform (IEC 61000-4-5 Level 4), and its fast response time and low clamping ratio support compliance with ISO 7637-2 (automotive) and IEC 61000-4-2 (ESD) when applied with appropriate system-level filtering. The device itself is tested to these waveforms per Vishay's characterization methodology.
SMCJ12CAHE3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ12CAHE3_A/H FAQ
1.How can I place an order for SMCJ12CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12CAHE3_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 SMCJ12CAHE3_A/H reliable?
The price and inventory of SMCJ12CAHE3_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 SMCJ12CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ12CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12CAHE3_A/H?
SMCJ12CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12CAHE3_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 SMCJ12CAHE3_A/H?
For technical support, including SMCJ12CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ12CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ12CAHE3_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 SMCJ12CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ12CAHE3_A/H?
All SMCJ12CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12CAHE3_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 SMCJ12CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ12CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ12CAHE3_A/H Tags
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