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Vishay General Semiconductor - Diodes Division 1.5SMC12CAHM3/H
- Part No.:
- 1.5SMC12CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12CAHM3/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
1.5SMC12CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), clamps to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is used to protect automotive sensor interfaces, industrial I/O ports, and telecom line receivers against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the 1.5SMC12CAHM3/H datasheet, 1.5SMC12CAHM3/H pinout, 1.5SMC12CAHM3/H application, or 1.5SMC12CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and verified 1500 W surge handling under standardized 10/1000 µs waveform conditions.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or either polarity for bidirectional types) voltage exceeds VBR, it avalanches into low-impedance conduction, diverting transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<5 µA at VWM).
Thermally, it uses a low-profile SMC package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation on standard PCB copper pads (8.0 mm × 8.0 mm per terminal). It meets MSL Level 1 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche initiation threshold for reliable clamping onset |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamping voltage during full 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W (10/1000 µs) - peak surge power handling capacity under industry-standard lightning/surge test waveform |
| IPPM | 89.8 A - maximum non-repetitive surge current the device safely conducts without failure |
| Junction Temp Range | −65 °C to +150 °C - enables operation in under-hood automotive and industrial environments |
| Leakage @ VWM | ≤5 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band absent (bidirectional symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One of two symmetrical terminals; conducts during positive transients relative to other terminal |
| Cathode | Transient current entry (negative polarity) | Second symmetrical terminal; conducts during negative transients - identical function to Anode due to bidirectionality |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR, VC, and IPPM performance in both polarities - eliminates polarity-aware layout constraints |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, ADAS, and body electronics |
| 1500 W peak pulse rating | Robust surge immunity meeting IEC 61000-4-5 Level 4 (4 kV) requirements when properly mounted |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients - critical for protecting 3.3 V/5 V logic and analog front-ends |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60 % RH - simplifies SMT assembly without baking preconditioning |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump spikes and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed across differential signal pair or supply rail to clamp transients before they reach sensitive interface ICs. Use Value: Prevents latch-up or permanent damage in automotive-grade microcontrollers and transceivers during ISO 7637-2 pulse 5a (load dump) events. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on input channel to absorb >1 kV transients induced by inductive loads or long cable runs. Use Value: Enables >100,000 actuation cycles without degradation, maintaining functional safety integrity per IEC 61000-4-4/5 compliance. |
| Telecom Line Receiver Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage protection device placed before common-mode chokes and secondary TVS arrays to handle bulk energy. Use Value: Limits clamped voltage to <17 V, ensuring safe operation of 3.3 V or 5 V receiver ICs even under 10/1000 µs 4 kV surges. |
Use Scenario: Adding secondary-level surge protection on DC output rails of AC/DC adapters for smart home devices and IoT gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS across +VOUT/GND to suppress fast transients from shared power buses or nearby switching noise. Use Value: Maintains <10 pF junction capacitance (typ.) - avoids signal distortion while providing 1500 W surge margin per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Lower PPPM (600 W), same VBR/VWM, SMB package (smaller footprint, higher RθJA) | Not rated for AEC-Q101; limited to commercial-grade consumer/industrial use | Select when board space is constrained and surge threat level is ≤2 kV (IEC 61000-4-5 Level 3) |
| 1.5KE12CA | Same 1500 W rating but axial DO-201 package; higher mounting thermal resistance and manual assembly requirement | Lacks MSL Level 1 and AEC-Q101 qualification; unsuitable for automated SMT or automotive applications | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ12CA and 1.5KE12CA, the 1.5SMC12CAHM3/H uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, 1500 W surge rating, and bidirectional symmetry - making it the preferred choice for production automotive and high-reliability industrial designs requiring zero-layout redesign risk.
Availability
1.5SMC12CAHM3/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom infrastructure projects requiring stable component supply, long-term lifecycle assurance, and traceable AEC-Q101-compliant sourcing.
Supply support for 1.5SMC12CAHM3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance across temperature and lifetime.
FAQ
What does the "HM3" suffix indicate in 1.5SMC12CAHM3/H?
The "HM3" suffix in 1.5SMC12CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7-inch tape-and-reel packaging (850 units per reel), and the "/H" revision code confirms compliance with Vishay's latest material and reliability specifications per document 88303.
Is 1.5SMC12CAHM3/H unidirectional or bidirectional?
1.5SMC12CAHM3/H is a bidirectional Transient Voltage Suppressor, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping behavior in both polarities, with identical VBR, VC, and IPPM ratings regardless of voltage polarity applied across its terminals.
What is the maximum clamping voltage of 1.5SMC12CAHM3/H at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC12CAHM3/H is 16.7 V when subjected to its rated peak pulse current of 89.8 A under the standard 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (document 88303, page 2) and defines the upper voltage limit imposed on protected circuitry during surge events.
Can 1.5SMC12CAHM3/H replace older 1.5SMC12A variants in existing designs?
Yes - 1.5SMC12CAHM3/H is a direct functional and mechanical replacement for earlier 1.5SMC12A variants in bidirectional applications, provided the design accommodates the CA (bidirectional) configuration. Its SMC (DO-214AB) footprint, thermal characteristics, and electrical ratings are fully compatible, and the HM3 suffix adds AEC-Q101 and halogen-free benefits without layout changes.
What is the junction-to-ambient thermal resistance (RθJA) of 1.5SMC12CAHM3/H?
The typical junction-to-ambient thermal resistance (RθJA) of 1.5SMC12CAHM3/H is 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pad per terminal. This value assumes natural convection cooling and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures.
1.5SMC12CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC12CAHM3/H FAQ
1.How can I place an order for 1.5SMC12CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12CAHM3/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 1.5SMC12CAHM3/H reliable?
The price and inventory of 1.5SMC12CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC12CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12CAHM3/H?
1.5SMC12CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12CAHM3/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 1.5SMC12CAHM3/H?
For technical support, including 1.5SMC12CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC12CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12CAHM3/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 1.5SMC12CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC12CAHM3/H?
All 1.5SMC12CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12CAHM3/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 1.5SMC12CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC12CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12CAHM3/H Tags
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