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Vishay General Semiconductor - Diodes Division SMCJ12CAHM3_A/H
- Part No.:
- SMCJ12CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12CAHM3_A/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,110
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Product details
Overview
SMCJ12CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 12 V standoff voltage (VWM), and 19.9 V clamping voltage (VC) at 75.4 A peak pulse current. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ12CAHM3_A/H datasheet, SMCJ12CAHM3_A/H pinout, SMCJ12CAHM3_A/H application, or SMCJ12CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages exceeding its reverse standoff voltage (VWM = 12 V). Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, making it suitable for AC-coupled or floating signal paths.
It features glass-passivated junction construction for stable breakdown behavior, low incremental surge resistance for minimal voltage overshoot during high-current transients, and thermal performance rated for continuous operation up to TJ = 150 °C with RθJA = 75 °C/W under standard mounting conditions.
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 - Breakdown occurs within this range at 1.0 mA test current |
| VC @ IPPM | 19.9 V - Clamped voltage across device at 75.4 A 10/1000 μs surge |
| PPPM | 1500 W - Peak transient energy absorption capability per single event |
| ID @ VWM | 5.0 μA - Reverse leakage current at full standoff voltage, ensuring low standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ12CAHM3_A/H uses the SMC (DO-214AB) package: a 2-terminal surface-mount device with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional clamping | Connected to protected line; conducts during negative transients relative to cathode reference |
| Cathode | Current exit point in forward bias; common terminal in bidirectional clamping | Connected to protected line; conducts during positive transients relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Halogen-free & RoHS-compliant | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21 for environmentally constrained applications |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; compatible with standard reflow profiles up to 260 °C peak |
| Low clamping ratio | VC/VWM = 1.66 - Minimizes overvoltage stress on downstream components during surge events |
| Fast response time | <1 ps - Limits transient propagation into protected circuitry before clamping action initiates |
Applications
| Automotive Sensor Signal Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and ground, clamping voltage spikes before they reach ADC input stages. Use Value: Maintains signal integrity by limiting transient overvoltage to ≤19.9 V while supporting 1500 W surge energy-exceeding ISO 7637-2 Pulse 5a requirements. | Use Scenario: Safeguarding differential CAN_H/CAN_L lines in vehicle body control modules against ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional clamping device connected across CAN bus pair, symmetrically suppressing ±15 kV ESD per IEC 61000-4-2. Use Value: Enables robust communication continuity with <5.0 μA leakage at 12 V, preventing false triggering or bus dominance during normal operation. |
| Telecom Power Input Stage | Consumer Appliance Motor Drive Feedback |
Use Scenario: Guarding 12 V DC input rails of VoIP phones and DSL modems against lightning-induced surges on PoE or wall adapter inputs. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converters and LDOs to absorb bulk surge energy before regulation. Use Value: Withstands 1500 W peak pulse power and 75.4 A surge current, meeting ITU-T K.21 Basic Protection Level for telecommunications equipment. | Use Scenario: Shielding hall-effect sensor feedback lines in smart washing machine motor controllers from commutation noise. IC Role / Device Role / Timing Role: Localized TVS mounted directly at sensor connector to minimize loop inductance and improve high-frequency transient rejection. Use Value: Low 19.9 V clamping voltage ensures sensor output remains within ADC input range even during 10/1000 μs inductive spikes from BLDC motor switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (23.2 V) | Not suitable for high-energy surge environments like automotive load dump | Select when space-constrained layouts require smaller footprint and surge energy is ≤400 W |
| SMCJ12AHE3_A/H | Unidirectional version; includes cathode band marking; identical VWM, VC, and PPPM | Requires polarity-aware placement; unsuitable for AC or floating signal paths | Choose only if circuit topology mandates unidirectional clamping and polarity alignment is guaranteed |
Compared with SMAJ12CA-E3/57T and SMCJ12AHE3_A/H, SMCJ12CAHM3_A/H delivers superior surge handling (1500 W vs. 400 W) and true bidirectional symmetry-critical for CAN, RS-485, and sensor bridge applications where polarity cannot be assumed.
Availability
SMCJ12CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial automation interfaces, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and halogen-free compliance.
Supply support for SMCJ12CAHM3_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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and communications systems where robustness against repetitive surge events is mandatory.
FAQ
What is the clamping voltage of SMCJ12CAHM3_A/H at its rated peak pulse current?
The SMCJ12CAHM3_A/H has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 75.4 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and defines the upper voltage limit imposed on protected circuits during surge events.
Is SMCJ12CAHM3_A/H qualified for automotive applications?
Yes, SMCJ12CAHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code. This certification confirms that the device has passed rigorous stress tests-including temperature cycling, high-temperature operating life, and ESD-required for use in automotive electronic control units, sensor modules, and infotainment systems.
How does the bidirectional design of SMCJ12CAHM3_A/H affect PCB layout?
The bidirectional design of SMCJ12CAHM3_A/H eliminates polarity marking-no cathode band is present-so orientation on the PCB is not critical. This simplifies automated placement and reduces risk of assembly error in AC-coupled or differential signal paths such as CAN, RS-485, or bridge sensor outputs where voltage polarity reverses during normal operation.
What is the thermal resistance of SMCJ12CAHM3_A/H, and how does it impact power dissipation?
SMCJ12CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard mounting conditions (0.31″ × 0.31″ copper pads). At TA = 50 °C, its steady-state power dissipation (PD) is rated at 6.5 W; exceeding this requires derating or enhanced heatsinking to maintain TJ ≤ 150 °C and ensure long-term reliability.
Does SMCJ12CAHM3_A/H meet RoHS and halogen-free requirements?
Yes, SMCJ12CAHM3_A/H carries the "HM3" suffix, denoting halogen-free, RoHS-compliant construction per EU Directive 2011/65/EU and IEC 61249-2-21. It contains no brominated flame retardants or chlorine-based compounds, making it suitable for environmentally regulated markets including automotive and industrial equipment sold in the EU and China.
SMCJ12CAHM3_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:
- 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)
SMCJ12CAHM3_A/H FAQ
1.How can I place an order for SMCJ12CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12CAHM3_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 SMCJ12CAHM3_A/H reliable?
The price and inventory of SMCJ12CAHM3_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 SMCJ12CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ12CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12CAHM3_A/H?
SMCJ12CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12CAHM3_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 SMCJ12CAHM3_A/H?
For technical support, including SMCJ12CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ12CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ12CAHM3_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 SMCJ12CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ12CAHM3_A/H?
All SMCJ12CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12CAHM3_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 SMCJ12CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ12CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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