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Vishay General Semiconductor - Diodes Division SM6T15CAHM3_B/H
- Part No.:
- SM6T15CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHM3_B/H.pdf
- Description:
- 600W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,203
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Product details
Overview
SM6T15CAHM3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 15 V standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), 21.2 V maximum clamping voltage (VC) at 28 A IPPM, and 600 W peak pulse power rating per 10/1000 μs waveform. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T15CAHM3_B/H datasheet, SM6T15CAHM3_B/H pinout, SM6T15CAHM3_B/H application, or SM6T15CAHM3_B/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering consistent clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling up to 100 A IFSM for unidirectional variants - though SM6T15CAHM3_B/H excludes forward surge rating due to bidirectional configuration.
Designed for surface-mount use in space-constrained layouts, it meets J-STD-020 MSL Level 1 and supports peak reflow temperatures up to 260 °C. The SMB package provides low inductance and excellent thermal coupling to PCB copper, enabling reliable energy dissipation during repetitive 10/1000 μs transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum reverse stand-off voltage before conduction begins; defines safe operating range for protected circuit |
| VBR (min) | 14.3 V - guaranteed breakdown starts no lower than this value at 1 mA test current; ensures predictable turn-on threshold |
| VC @ IPPM | 21.2 V at 28 A - clamped voltage during 10/1000 μs transient; determines worst-case overvoltage seen by downstream IC |
| PPPM | 600 W - peak pulse power handling capability; defines transient energy absorption limit under standardized waveform |
| TJ max. | +150 °C - maximum junction temperature; sets upper boundary for thermal design margin in high-ambient environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient air; used to calculate temperature rise under DC power dissipation |
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). Matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode | Bidirectional terminal pair | No polarity marking; terminals function identically in either direction - enables symmetrical transient suppression on AC or floating lines |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation when mounted per recommended pad layout |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.49) | Minimizes overvoltage stress on protected components compared to higher-ratio TVS devices |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement without baking - simplifies manufacturing logistics |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller GPIOs in vehicle door modules exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching communication ICs. Use Value: Maintains signal integrity under ISO 10605 ESD (±30 kV contact) and ISO 7637-2 Pulse 5a (75 V/300 ms), preventing latch-up or permanent damage. | Use Scenario: Safeguarding differential CANH/CANL lines in factory automation controllers subjected to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Common-mode transient suppressor across bus pair, leveraging symmetrical clamping to preserve differential signaling margins. Use Value: Limits common-mode overvoltage to ≤21.2 V while preserving >1 V differential noise margin, ensuring bit error rate compliance per ISO 11898-2. |
| Consumer Power Adapter Input | Telecom DSL Line Interface |
Use Scenario: Secondary-side overvoltage protection on 12 V DC output rails of wall-mounted AC/DC adapters used in smart home hubs. IC Role / Device Role / Timing Role: Fast-response clamp absorbing residual surges escaping primary-side MOVs and Y-capacitors. Use Value: Prevents brownout or reset events in connected SoCs by limiting transient excursions to <22 V for durations <1 ms. | Use Scenario: Protecting ADSL/VDSL line driver/receiver ICs from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary-level bidirectional surge suppressor placed before transformer coupling network. Use Value: Withstands ITU-T K.20/21-compliant longitudinal surges (10/700 μs, 1 kV) without failure, maintaining POTS voice channel continuity. |
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), identical SMB package, but rated for 400 W PPPM (vs. 600 W); RθJA = 110 °C/W | Lacks AEC-Q101 qualification; not approved for automotive underhood use | Select SMAJ15CA only for cost-sensitive commercial applications where 400 W pulse rating suffices and automotive qualification is unnecessary |
| SMCJ15CA | Same VWM and bidirectional operation, but in larger SMC (DO-214AB) package; rated for 1500 W PPPM and RθJA = 50 °C/W | Requires larger PCB footprint and different pad layout; better suited for high-reliability industrial power supplies | Choose SMCJ15CA when system-level surge requirements exceed IEC 61000-4-5 Level 4 and thermal management demands lower junction rise |
Compared with SMAJ15CA and SMCJ15CA, SM6T15CAHM3_B/H delivers optimal balance of automotive qualification, 600 W surge capacity, and compact SMB footprint - making it ideal for space-constrained, AEC-Q101–mandated designs where SMC-level ruggedness is unnecessary.
Availability
SM6T15CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor units, industrial CAN bus nodes, consumer power adapter outputs, and telecom DSL line interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T15CAHM3_B/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 SM6T Series is designed specifically for robust, surface-mount transient voltage suppression in automotive, industrial, and communications systems - prioritizing AEC-Q101 qualification, low clamping voltage, and compatibility with high-speed automated assembly.
FAQ
What is the clamping voltage of SM6T15CAHM3_B/H under a 10/1000 μs transient?
The SM6T15CAHM3_B/H has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current (IPPM) of 28 A using a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and reflects worst-case overvoltage seen by protected circuitry under standardized surge conditions.
Is SM6T15CAHM3_B/H qualified for automotive applications?
Yes, SM6T15CAHM3_B/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). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its use in automotive powertrain, chassis, and body electronics.
What does the "HM3" suffix indicate in SM6T15CAHM3_B/H?
The "HM3" suffix in SM6T15CAHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "B/H" indicates packaging in 7" diameter plastic tape and reel with 750 units per reel, conforming to JEDEC standard delivery formats for SMT assembly lines.
How does SM6T15CAHM3_B/H differ from unidirectional SM6T15A variants?
SM6T15CAHM3_B/H is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas SM6T15A is unidirectional with a marked cathode band and specified IFSM (100 A). The CA variant supports AC-coupled or floating-line protection, while the unidirectional version is intended for DC rail clamping with defined polarity orientation.
What is the thermal resistance of SM6T15CAHM3_B/H, and how does it affect layout?
SM6T15CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperature under sustained power dissipation, designers must ensure adequate copper area and avoid excessive trace length between device terminals and thermal planes - especially critical in high-ambient automotive environments.
SM6T15CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- 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_B/H FAQ
1.How can I place an order for SM6T15CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHM3_B/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_B/H reliable?
The price and inventory of SM6T15CAHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SM6T15CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHM3_B/H?
SM6T15CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHM3_B/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_B/H?
For technical support, including SM6T15CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHM3_B/H requirements.
6.How does Aetrix verify that SM6T15CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SM6T15CAHM3_B/H?
All SM6T15CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SM6T15CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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