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Vishay General Semiconductor - Diodes Division SM15T15CAHM3/H
- Part No.:
- SM15T15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CAHM3/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,439
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Product details
Overview
SM15T15CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 15 V standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It clamps transients to ≤27.2 V at 368 A IPPM and operates from −65 °C to +150 °C, protecting automotive sensor signal lines against lightning-induced surges and inductive switching transients.
For engineers reviewing the SM15T15CAHM3/H datasheet, SM15T15CAHM3/H pinout, SM15T15CAHM3/H application, or SM15T15CAHM3/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
The SM15T15CAHM3/H employs a glass-passivated silicon junction optimized for low-inductance, high-energy transient suppression. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting I/O line protection where voltage reversals occur.
Designed per J-STD-020 MSL Level 1 with 260 °C reflow peak, it delivers stable clamping performance up to TJ = 150 °C and exhibits thermal resistance RθJL = 15 °C/W to leads-critical for sustained surge duty in automotive ECUs and industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line bias margin. |
| VBR (min) | 16.7 V - Minimum breakdown voltage at 1.0 mA test current; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 27.2 V at 368 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power rating; validates robustness against lightning-induced transients per IEC 61000-4-5. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive deployment without derating. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SM15T15CAHM3/H uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standard layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Completes low-inductance surge current loop during either polarity event; connects to ground or common reference plane. |
| Cathode | Transient return path (bidirectional) | Functionally identical to Anode in CA-suffix devices; no polarity distinction-both terminals serve as symmetrical clamping nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, LIN, sensor bridges) without polarity concerns. |
| AEC-Q101 qualified (HM3 suffix) | Confirms suitability for automotive applications including engine control, ADAS sensors, and body electronics with zero field failure history requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and end-of-life recycling. |
| Low clamping ratio (VC/VBR ≈ 1.63) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking; reduces production line complexity and cost. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS diode absorbing ±1 kV/50 Ω fast transients while maintaining signal integrity below 27.2 V. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADCs by limiting transient voltage to 27.2 V at 368 A. |
Use Scenario: Shielding RS-485/RS-422 differential data lines in PLC backplanes from EFT bursts and surge coupling via shared chassis ground. IC Role / Device Role / Timing Role: Low-inductance transient shunt placed across differential pair inputs to clamp common-mode surges before receiver input stage. Use Value: Maintains data integrity during 4 kV EFT testing by clamping within 10 ns and surviving repeated 1500 W pulses without parameter shift. |
| Consumer Power Adapter Interface | Telecom DC Power Input Stage |
Use Scenario: Safeguarding USB-C CC and VCONN lines in portable chargers against hot-plug induced transients and electrostatic discharge. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between connector and USB PD controller, responding within nanoseconds. Use Value: Limits voltage excursion to ≤27.2 V during 8/20 μs surges, preserving PD negotiation logic and preventing false disconnect events. |
Use Scenario: Front-end protection of -48 V DC telecom power feeds entering base station equipment subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary surge arrestor in series with DC-DC converter input, diverting >300 A transients to chassis ground. Use Value: Withstands 1500 W peak power without short-circuit failure, enabling fail-safe operation and reducing need for secondary crowbar circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Lower PPPM (400 W), same VWM (15 V), SMA package (smaller thermal mass) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for lightning-level surges | Select when board space is constrained and threat level is limited to contact ESD or low-energy switching noise. |
| SMCJ15CA | Same PPPM (1500 W), identical VWM/VBR/VC, but HM3 suffix not guaranteed; may be commercial-grade (M3/E3) | Lacks AEC-Q101 validation and halogen-free assurance unless explicitly ordered as HM3 variant | Choose only if automotive qualification and material compliance are not required-verify suffix and certification per order code. |
Compared with SMAJ15CA and SMCJ15CA, SM15T15CAHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and guaranteed 1500 W surge capability in a single M3-suffixed part-enabling drop-in compliance for Tier 1 automotive BOMs without redesign or requalification.
Availability
SM15T15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, and telecom power entry points requiring stable component supply, long-term lifecycle support, and certified AEC-Q101 performance.
Supply support for SM15T15CAHM3/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 targets high-energy transient suppression in harsh environments-specifically engineered for automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "HM3" suffix indicate in SM15T15CAHM3/H?
The HM3 suffix in SM15T15CAHM3/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance, MSL Level 1 reflow capability, and automotive-grade reliability testing-distinct from commercial-grade M3 or E3 variants. SM15T15CAHM3/H meets all requirements for under-hood deployment.
Is SM15T15CAHM3/H unidirectional or bidirectional?
SM15T15CAHM3/H is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative transients without polarity marking-ideal for protecting AC-coupled lines like CAN bus, sensor bridges, or differential signaling interfaces where voltage polarity reversal occurs.
What is the clamping voltage of SM15T15CAHM3/H at its rated peak pulse current?
SM15T15CAHM3/H clamps to a maximum of 27.2 V at its rated peak pulse current (IPPM) of 368 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does SM15T15CAHM3/H require a heatsink for continuous power dissipation?
No-SM15T15CAHM3/H is rated for 6.5 W steady-state power dissipation on an infinite heatsink at TA = 50 °C, but typical TVS operation is transient-only. Its RθJA = 75 °C/W and RθJL = 15 °C/W allow adequate thermal relief through PCB copper pads alone; no external heatsink is needed for surge duty cycles.
How does SM15T15CAHM3/H differ from SM15T15A in terms of functionality?
SM15T15CAHM3/H is bidirectional with no polarity marking and symmetric clamping, while SM15T15A is unidirectional with cathode band identification. Both share identical VWM (15 V), VBR (14.3–15.8 V), and PPPM (1500 W), but SM15T15CAHM3/H supports AC or floating signal protection where polarity reversal occurs-critical for CAN, LIN, and bridge sensor outputs.
SM15T15CAHM3/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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
SM15T15CAHM3/H FAQ
1.How can I place an order for SM15T15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CAHM3/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 SM15T15CAHM3/H reliable?
The price and inventory of SM15T15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CAHM3/H?
SM15T15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CAHM3/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 SM15T15CAHM3/H?
For technical support, including SM15T15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CAHM3/H requirements.
6.How does Aetrix verify that SM15T15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T15CAHM3/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 SM15T15CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T15CAHM3/H?
All SM15T15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CAHM3/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 SM15T15CAHM3/H part is unused and in its original packaging.
Return procedure for SM15T15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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