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Vishay General Semiconductor - Diodes Division SM6T15CAHM3/H
- Part No.:
- SM6T15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHM3/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,752
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Product details
Overview
SM6T15CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V standoff voltage (VWM), 21.2 V clamping voltage (VC) at 28 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, MOSFET gate drivers, and industrial I/O interfaces.
For engineers reviewing the SM6T15CAHM3/H datasheet, SM6T15CAHM3/H pinout, SM6T15CAHM3/H application, or SM6T15CAHM3/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (1.41), and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 14.3–15.8 V (min/max) under 1 mA test current. Its clamping action limits transient voltages to ≤21.2 V at 28 A (10/1000 μs), enabling reliable protection of 3.3 V/5 V/12 V logic and analog circuits against ISO 7637-2 and IEC 61000-4-5 threats.
The device features glass-passivated junction, low inductance design, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification and HM3 suffix confirm halogen-free, RoHS-compliant construction for automotive-grade reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum reverse stand-off voltage before conduction; ensures no leakage during normal 12 V system operation. |
| VBR (min/max) | 14.3 V / 15.8 V - Breakdown occurs within this range at 1 mA; defines precise turn-on threshold for transient detection. |
| VC @ IPPM | 21.2 V at 28 A - Clamped voltage during 600 W surge; keeps protected ICs below absolute maximum ratings. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports high-energy transients in automotive load-dump scenarios. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Cathode band absent (bidirectional device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative transients; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive transients; identical electrical behavior to anode due to bidirectional structure. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 600 W peak pulse power | Withstands high-energy surges such as ISO 7637-2 Pulse 5a (load dump) up to 120 V, 100 ms. |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking, reducing manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and load-switching transients in vehicle cabins and powertrain modules. IC Role / Device Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Prevents latch-up or damage in 5 V/12 V sensor front-ends while maintaining signal integrity during ISO 10605 ±15 kV contact discharge. | Use Scenario: Safeguarding PLC digital input channels and RS-485 transceiver pins against field-induced surges in factory automation equipment. IC Role / Device Role: Parallel-connected transient suppressor on signal line and VCC-GND rails to limit voltage excursion during 4 kV EFT bursts. Use Value: Ensures uninterrupted operation under IEC 61000-4-4 Level 4 (4 kV) fast transient immunity testing without system reset. |
| Power Supply Rail Protection | MOSFET Gate Driver Protection |
Use Scenario: Clamping 12 V/24 V DC power rails in automotive infotainment head units and ADAS domain controllers against battery line transients. IC Role / Device Role: Low-inductance TVS mounted directly at power entry point to absorb ISO 7637-2 Pulse 1 (−150 V, 2 Ω source) and Pulse 2a (+100 V). Use Value: Maintains stable VCC for microcontrollers and PMICs during cold-crank and jump-start events. | Use Scenario: Shielding high-side/low-side gate drivers in motor control inverters from Miller-induced voltage spikes and shoot-through transients. IC Role / Device Role: Bidirectional clamp across gate-source terminals to prevent VGS overstress beyond ±20 V absolute maximum rating. Use Value: Extends MOSFET lifetime by limiting gate oxide stress during fast switching in 48 V BLDC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (12.8 V), lower PPPM (400 W), SMA package (larger RθJA = 140 °C/W) | Less suitable for high-repetition surges or compact automotive modules requiring AEC-Q101 | Select when cost sensitivity outweighs power density and automotive qualification needs. |
| SMCJ15CA | Same VWM, higher PPPM (1500 W), larger SMC package (5.3 mm × 4.6 mm) | Requires more PCB area; better for industrial power supplies with space margin but not automotive footprint constraints | Choose for higher surge margin where board space permits and AEC-Q101 is not mandatory. |
Compared with SMAJ15CA and SMCJ15CA, SM6T15CAHM3/H delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, SMB footprint, and halogen-free compliance-making it the preferred choice for space-constrained, automotive-grade transient protection where reliability and regulatory alignment are critical.
Availability
SM6T15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and MOSFET gate driver safeguarding requiring stable component supply across production lifecycles.
Supply support for SM6T15CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SM6T Series is designed specifically for high-reliability transient suppression in automotive, industrial, and telecom systems-delivering consistent clamping performance, AEC-Q101 validation, and optimized thermal behavior in compact SMB packages.
FAQ
What is the clamping voltage of SM6T15CAHM3/H at its rated peak pulse current?
The SM6T15CAHM3/H has a maximum clamping voltage (VC) of 21.2 V at 28 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and ensures protected circuitry remains within safe operating limits during surge events. The SM6T15CAHM3/H maintains this clamping performance across its full operating temperature range of −65 °C to +150 °C.
Is SM6T15CAHM3/H qualified for automotive applications?
Yes, SM6T15CAHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM6T series datasheet (Rev. 09-Jan-2024, Doc. #88385). The HM3 designation indicates halogen-free, RoHS-compliant construction with automotive-grade reliability testing. SM6T15CAHM3/H is intended for use in engine control units, body electronics, and ADAS sensor modules where extended temperature operation and surge immunity are required.
What does the "CA" suffix indicate in SM6T15CAHM3/H?
The "CA" suffix in SM6T15CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T15A), SM6T15CAHM3/H has no polarity marking and functions identically regardless of voltage polarity-making it ideal for protecting AC-coupled signals, differential buses, or floating rails where directionality cannot be assumed.
What is the thermal resistance of SM6T15CAHM3/H, and how does it affect PCB layout?
The SM6T15CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard SMB pad layout per Vishay's recommended footprint. To maintain safe junction temperatures during repeated surges, designers must ensure adequate copper area and avoid excessive trace length-especially critical in automotive applications where ambient temperatures exceed 105 °C.
How does SM6T15CAHM3/H differ from SM6T15A in practical circuit design?
SM6T15CAHM3/H is bidirectional with no polarity marking, while SM6T15A is unidirectional and requires correct cathode orientation relative to system ground. In practice, SM6T15CAHM3/H simplifies layout for differential or floating nodes (e.g., CAN H/L, RS-485), eliminates risk of reverse installation, and avoids forward conduction during negative transients. SM6T15A would conduct continuously if reverse-biased in DC systems, whereas SM6T15CAHM3/H remains blocking in both directions until breakdown threshold is exceeded.
SM6T15CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SM6T15CAHM3/H FAQ
1.How can I place an order for SM6T15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHM3/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 SM6T15CAHM3/H reliable?
The price and inventory of SM6T15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHM3/H?
SM6T15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHM3/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 SM6T15CAHM3/H?
For technical support, including SM6T15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHM3/H requirements.
6.How does Aetrix verify that SM6T15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHM3/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 SM6T15CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T15CAHM3/H?
All SM6T15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHM3/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 SM6T15CAHM3/H part is unused and in its original packaging.
Return procedure for SM6T15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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