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Vishay General Semiconductor - Diodes Division SM15T15AHM3/I
- Part No.:
- SM15T15AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHM3/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
SM15T15AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM = 12.8 V), and clamping voltage of 21.2 V at 71 A peak pulse current. It provides robust protection for automotive-grade sensor signal lines against inductive switching transients and ESD events.
For engineers reviewing the SM15T15AHM3/I datasheet, SM15T15AHM3/I pinout, SM15T15AHM3/I application, or SM15T15AHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping behavior under 10/1000 μs surge, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
The SM15T15AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its low-inductance SMC package and cathode-band polarity marking support high-speed surge response and automated placement.
It meets AEC-Q101 qualification for automotive use and is rated for TJ = –65 °C to +150 °C operation. Thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) are measured on 0.31" × 0.31" copper pads, enabling accurate PCB thermal design for sustained 6.5 W power dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at IT = 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering during transients. |
| VC (Clamping Voltage) | 21.2 V at IPPM = 71 A (10/1000 μs) - Peak voltage seen by protected circuit under worst-case surge; enables safe margin for 15 V rail systems. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains lightning-induced or motor-switching surges without failure; validated per Fig. 1 derating curve. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports under-hood automotive environments with proper PCB thermal relief. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; critical for thermal reliability modeling. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements; ordering suffix HM3 denotes halogen-free, RoHS-compliant AEC-Q101 grade. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to system ground or lower-potential node; completes clamping path during reverse transient. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., sensor output); conducts avalanche current when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating on standard PCB layouts. |
| Glass passivated chip junction | Ensures stable breakdown characteristics and long-term reliability under repeated transient stress. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity. |
| AEC-Q101 qualified & halogen-free | Meets automotive supply chain requirements for environmental compliance and mission-critical reliability. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load-dump and inductive kickback. IC Role / Device Role: Unidirectional TVS placed between sensor output and microcontroller ADC input. Use Value: Clamps transients to ≤21.2 V while maintaining <1 μA leakage at 12.8 V, preserving signal integrity and preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding digital I/O lines connected to PLC outputs driving solenoids or contactors in factory automation. IC Role / Device Role: Transient suppressor on 24 V DC control lines subject to switching spikes up to 1 kV. Use Value: Absorbs 1500 W surges without degradation, enabling >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
| Telecom Line Interface | Computer Peripheral Port |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul modules from lightning-induced surges on outdoor cabling. IC Role / Device Role: Primary protection device upstream of integrated ESD diodes in transceiver ICs. Use Value: Low clamping voltage (21.2 V) prevents overstress of transceiver's internal 30 V absolute maximum rating during 10/1000 μs threats. |
Use Scenario: Securing USB 2.0 D+/D− lines in docking stations against ESD and cable discharge events. IC Role / Device Role: Board-level TVS positioned before USB connector to shunt fast transients away from PHY IC. Use Value: 75 °C/W RθJA allows thermal stability during repeated ±8 kV contact ESD pulses per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T | Same VWM (12.8 V), but lower PPPM (400 W); SMA package (DO-214AC), higher RθJA (105 °C/W). | Not AEC-Q101 qualified; suited for commercial-grade consumer electronics only. | Select when cost or board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| 1.5SMC15A | Identical electrical specs (VWM, VBR, VC, PPPM), same SMC package, but no AEC-Q101 or halogen-free certification (M3 suffix absent). | Lacks automotive qualification and JESD201 Class 2 whisker testing; not approved for under-hood use. | Choose only for non-automotive industrial applications where full Vishay HM3 compliance is unnecessary. |
Compared with SMAJ15A-E3/57T and 1.5SMC15A, the SM15T15AHM3/I delivers guaranteed AEC-Q101 qualification, halogen-free construction, and superior thermal performance (RθJA = 75 °C/W vs. 105 °C/W), making it the sole option for production automotive designs requiring traceable compliance and extended temperature reliability.
Availability
SM15T15AHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and telecom line interface circuits requiring stable component supply across multi-year production cycles.
Supply support for SM15T15AHM3/I 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, and transient protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SM15T15AHM3/I at its rated peak pulse current?
The SM15T15AHM3/I has a maximum clamping voltage (VC) of 21.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 71 A. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T15AHM3/I maintains this clamping performance across its operational temperature range.
Is SM15T15AHM3/I qualified for automotive applications?
Yes, SM15T15AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3", which denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It is intended for use in automotive subsystems including engine control, body electronics, and ADAS sensor interfaces where reliability under thermal and mechanical stress is critical.
What does the "HM3" suffix mean in SM15T15AHM3/I?
The "HM3" suffix in SM15T15AHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification, and compliance with JESD201 Class 2 whisker testing. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms suitability for automotive production environments per Vishay's ordering information table.
What is the thermal resistance of SM15T15AHM3/I, and how is it measured?
The SM15T15AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per JEDEC standards. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values enable accurate thermal modeling for PCB layout and power derating above TA = 25 °C.
How does SM15T15AHM3/I differ from SM15T15A-E3/57T?
The SM15T15AHM3/I differs from SM15T15A-E3/57T in three key ways: it carries the HM3 suffix confirming AEC-Q101 qualification and halogen-free content, whereas E3/57T is commercial-grade only; it uses "I" tape-and-reel packaging (3500 units per 13″ reel) versus "57T" (850 units per 7″ reel); and it meets JESD201 Class 2 whisker testing, unlike the E3 version.
SM15T15AHM3/I 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:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T15AHM3/I FAQ
1.How can I place an order for SM15T15AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHM3/I 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 SM15T15AHM3/I reliable?
The price and inventory of SM15T15AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15AHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T15AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHM3/I?
SM15T15AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHM3/I 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 SM15T15AHM3/I?
For technical support, including SM15T15AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHM3/I requirements.
6.How does Aetrix verify that SM15T15AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T15AHM3/I 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 SM15T15AHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T15AHM3/I?
All SM15T15AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHM3/I, 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 SM15T15AHM3/I part is unused and in its original packaging.
Return procedure for SM15T15AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHM3/I Tags
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