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Vishay General Semiconductor - Diodes Division SM15T12CAHM3/H
- Part No.:
- SM15T12CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CAHM3/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,105
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Product details
Overview
SM15T12CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 12 V stand-off voltage (VWM), and clamping voltage of 16.7 V at 90 A peak pulse current - used to protect automotive sensor signal lines, I/O ports, and MOSFET gate drivers against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T12CAHM3/H datasheet, SM15T12CAHM3/H pinout, SM15T12CAHM3/H application, or SM15T12CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 1500 W surge handling on standard PCB copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR = 11.4–12.6 V at 1 mA), clamping (VC = 16.7 V at IPPM = 90 A), and leakage (<10 μA at VWM = 12 V) characteristics. Its low-inductance SMC package enables fast response to sub-microsecond transients.
The device features glass-passivated junctions, meets MSL Level 1 (260 °C reflow), and is qualified to AEC-Q101 - confirming suitability for automotive under-hood and body electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - ensures consistent bidirectional breakdown threshold across production lots |
| VC @ IPPM | 16.7 V at 90 A (10/1000 μs) - limits downstream IC voltage stress during high-energy surges |
| PPPM | 1500 W - sustains lightning-surge-level threats per ISO 7637-2 and IEC 61000-4-5 without degradation |
| TJ max | +150 °C - supports operation in engine bay environments with minimal derating |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - meets automotive OEM component release requirements |
Pinout & Package
SM15T12CAHM3/H uses a 2-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional functionality. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity - eliminates orientation constraints during placement |
| Case (cathode band absent) | Non-polarized package body | No marking required; simplifies automated optical inspection and eliminates risk of reverse mounting |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges without external series impedance |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive applications including powertrain sensors, ADAS camera interfaces, and body control modules |
| Halogen-free, RoHS-compliant construction | Meets EU ELV Directive and OEM sustainability requirements without compromising surge robustness |
| Low clamping ratio (VC/VWM = 1.39) | Minimizes overvoltage margin between protection threshold and protected IC's absolute maximum rating |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing without baking - reduces manufacturing overhead |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in vehicle chassis modules exposed to load-dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 1500 W surge events while meeting AEC-Q101 lifetime reliability targets for 15-year vehicle service life. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring subject to relay coil flyback and motor drive coupling. IC Role / Device Role / Timing Role: Primary overvoltage suppression element located adjacent to optocoupler input stage to prevent false triggering and latch-up. Use Value: Clamps 10/1000 μs transients to ≤16.7 V within 1 ns, ensuring immunity to >1 kV common-mode surges per IEC 61000-4-4. |
| Power Supply Rail Protection | MOSFET Gate Driver Protection |
Use Scenario: Secondary surge suppression on 12 V auxiliary rails powering infotainment head units and telematics ECUs in passenger compartments. IC Role / Device Role / Timing Role: Parallel-connected TVS providing fail-safe short-circuit protection when upstream fuses or polymeric PTCs respond too slowly. Use Value: Withstands repeated 1500 W pulses without parameter shift - avoids latent degradation that compromises long-term system safety. | Use Scenario: Shielding high-side N-channel MOSFET gate drivers in BLDC motor controllers from Miller-induced voltage spikes during fast switching transitions. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional clamp placed between gate and source to limit dV/dt stress. Use Value: Prevents gate oxide breakdown by limiting transient overshoot to <17 V while adding <0.5 nH parasitic inductance - preserving switching speed. |
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 | 600 W peak power (10/1000 μs), same VWM and package; lower IPPM (32.5 A) | Not AEC-Q101 qualified; limited to commercial-grade industrial or consumer use | Select when cost sensitivity outweighs automotive qualification and surge energy requirements are ≤600 W |
| SMCJ12CA | 1500 W peak power, same VWM, but larger SMC package variant with higher thermal mass (RθJA = 50 °C/W vs. 75 °C/W) | Higher board space requirement (7.11 mm × 6.22 mm vs. 6.60 mm × 6.22 mm); better sustained power handling | Select when ambient temperature exceeds 105 °C or when multiple simultaneous surges require improved thermal recovery |
Compared with SMAJ12CA and SMCJ12CA, SM15T12CAHM3/H delivers AEC-Q101 assurance in the smallest 1500 W SMC footprint, enabling compact, automotive-grade protection without sacrificing clamping performance or surge endurance.
Availability
SM15T12CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and power supply rail protection requiring stable component supply and full traceability through production lifecycles.
Supply support for SM15T12CAHM3/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing facilities focused on high-reliability passive protection components.
The SM15T Series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be predictable (short-circuit) and qualification to AEC-Q101 is mandatory.
FAQ
What does the "HM3" suffix indicate in SM15T12CAHM3/H?
The "HM3" suffix in SM15T12CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards including temperature cycling, humidity bias, and mechanical shock testing - essential for under-hood and body electronics deployment. SM15T12CAHM3/H is not a commercial-grade variant.
Is SM15T12CAHM3/H unidirectional or bidirectional?
SM15T12CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping in both polarities with identical VBR, VC, and leakage characteristics - eliminating the need for polarity-aware layout and enabling direct replacement of legacy bidirectional suppressors like P6SMB12CA.
What is the maximum clamping voltage of SM15T12CAHM3/H at its rated peak pulse current?
The maximum clamping voltage of SM15T12CAHM3/H is 16.7 V at 90 A peak pulse current (10/1000 μs waveform), measured per Figure 1 in Vishay document 88380. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is guaranteed across the full operating temperature range.
Does SM15T12CAHM3/H require a heatsink for standard operation?
No, SM15T12CAHM3/H does not require an external heatsink for transient suppression duty cycles. Its RθJA of 75 °C/W is specified for mounting on 8.0 mm × 8.0 mm copper pads per terminal - sufficient for intermittent surge dissipation. Continuous power dissipation is limited to 6.5 W at 50 °C ambient, well below its 1500 W pulsed rating.
How does SM15T12CAHM3/H differ from SM15T12A variants?
SM15T12CAHM3/H differs from unidirectional SM15T12A variants by its bidirectional functionality (CA suffix), absence of cathode band marking, and symmetrical electrical behavior. While both share the same VWM, VBR, and PPPM, only SM15T12CAHM3/H protects AC-coupled or floating signal paths without polarity constraints - critical for differential buses and transformer-isolated interfaces.
SM15T12CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 90A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T12CAHM3/H FAQ
1.How can I place an order for SM15T12CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CAHM3/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 SM15T12CAHM3/H reliable?
The price and inventory of SM15T12CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T12CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T12CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CAHM3/H?
SM15T12CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CAHM3/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 SM15T12CAHM3/H?
For technical support, including SM15T12CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CAHM3/H requirements.
6.How does Aetrix verify that SM15T12CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T12CAHM3/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 SM15T12CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T12CAHM3/H?
All SM15T12CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CAHM3/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 SM15T12CAHM3/H part is unused and in its original packaging.
Return procedure for SM15T12CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12CAHM3/H Tags
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