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Vishay General Semiconductor - Diodes Division SM15T15AHE3_A/I
- Part No.:
- SM15T15AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHE3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,827
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Product details
Overview
SM15T15AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 15 V standoff voltage (VWM = 12.8 V), 1500 W peak pulse power (10/1000 μs), and 71.0 A peak pulse current (IPPM), used to protect MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial systems.
For engineers reviewing the SM15T15AHE3_A/I datasheet, SM15T15AHE3_A/I pinout, SM15T15AHE3_A/I application, or SM15T15AHE3_A/I equivalent, key selection criteria include clamping voltage (VC = 21.2 V at IPPM), unidirectional polarity with cathode band marking, AEC-Q101 qualification, RoHS compliance, and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
This device operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its 14.3–15.8 V breakdown range (VBR at IT = 1.0 mA), clamping transients to ≤21.2 V while sustaining up to 1500 W for 10/1000 μs pulses. Its low inductance and glass-passivated junction support fast response and stable performance under repetitive surge stress.
Designed for surface-mount placement on PCBs with 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 (peak reflow = 260 °C) and delivers 6.5 W steady-state power dissipation at TA = 50 °C. Failure mode under overstress is short-circuit, ensuring system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - precise avalanche onset range ensures predictable turn-on behavior |
| VC @ IPPM | 21.2 V at 71.0 A (10/1000 μs) - low clamping voltage limits stress on protected downstream components |
| PPPM | 1500 W - high-energy surge handling capability suitable for lightning and motor-switching threats |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive and high-ambient industrial use |
| RθJA | 75 °C/W - thermal resistance enables reliable operation with standard PCB copper pad layout |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating in typical board layouts |
| Glass passivated chip junction | Improves long-term reliability and moisture resistance versus epoxy-passivated alternatives |
| AEC-Q101 qualified | Validated for automotive electronics applications including engine control, body modules, and ADAS sensors |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for protecting high-speed interfaces |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without preconditioning or special handling |
Applications
| Automotive Power Line Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges. Use Value: Clamps to 21.2 V within nanoseconds, preventing damage to 3.3 V/5 V microcontrollers and CAN transceivers downstream. | Use Scenario: Shielding PLC analog input channels from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line input to absorb 1500 W transient energy before reaching ADC front-end. Use Value: Limits voltage excursion to safe levels for precision op-amps and SAR ADCs, preserving measurement accuracy. |
| Consumer Sensor Interface Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding I²C/SPI lines of environmental sensors in smart home hubs exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS placed inline with bidirectional data lines to suppress sub-100 ns transients. Use Value: Maintains signal integrity with minimal capacitive loading and no false triggering during normal operation. | Use Scenario: Guarding 48 V PoE-powered telecom equipment inputs against lightning-induced surges entering via Ethernet cables. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input rail upstream of DC/DC converter to divert bulk surge energy. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W, extending system uptime in outdoor deployments. |
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) and VC (21.2 V), but lower PPPM (400 W) and IPPM (25.1 A); SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not suitable for lightning-level threats; limited to low-energy ESD and switching noise | Select only when space-constrained and surge threat level is below IEC 61000-4-5 Level 2 |
| 1.5KE15A | Through-hole DO-201 package; identical electrical specs (VWM = 12.8 V, VC = 21.2 V, PPPM = 1500 W), but no AEC-Q101 qualification or MSL Level 1 rating | Not recommended for automated SMT production or automotive applications requiring qualification traceability | Prefer for legacy through-hole designs or cost-sensitive non-automotive industrial use |
Compared with SMAJ15A-E3/57T and 1.5KE15A, SM15T15AHE3_A/I uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, MSL Level 1 reflow readiness, and full 1500 W surge capacity-making it the optimal choice for new automotive and high-reliability industrial designs requiring zero-layout compromise.
Availability
SM15T15AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial PLC analog inputs, and telecom DC power entry points requiring stable component supply, AEC-Q101 traceability, and consistent surge immunity across production batches.
Supply support for SM15T15AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure resilience and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T15AHE3_A/I under a 10/1000 μs surge?
The SM15T15AHE3_A/I has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 71.0 A with a 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Doc. #88380) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T15AHE3_A/I qualified for automotive applications?
Yes, SM15T15AHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's SM15T Series datasheet (Rev. 09-Jan-2024). It is approved for use in automotive subsystems including body electronics, infotainment, and ADAS sensor interfaces where transient immunity and long-term reliability are critical.
What does the "_A/I" suffix mean in SM15T15AHE3_A/I?
The "_A/I" suffix in SM15T15AHE3_A/I indicates packaging configuration: "A" denotes the base revision code, and "I" specifies 13-inch diameter plastic tape and reel delivery containing 3500 units. This matches Vishay's ordering information table (page 3 of Doc. #88380) and confirms full RoHS compliance and AEC-Q101 qualification.
How does SM15T15AHE3_A/I differ from bidirectional variants like SM15T15CA?
SM15T15AHE3_A/I is unidirectional with cathode-band polarity and blocks reverse current above 12.8 V, while SM15T15CA is bidirectional (no polarity marking) and clamps symmetrically for AC-coupled or floating lines. Their VBR, VC, and PPPM are identical, but SM15T15AHE3_A/I must be oriented correctly in-circuit to avoid forward conduction during normal operation.
What is the thermal resistance of SM15T15AHE3_A/I, and how does it affect PCB layout?
SM15T15AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures, designers must allocate adequate copper area and avoid excessive trace length between the device and ground plane-especially under sustained 6.5 W power dissipation conditions.
SM15T15AHE3_A/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:
- Active
- 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 (SMCJ)
SM15T15AHE3_A/I FAQ
1.How can I place an order for SM15T15AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHE3_A/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 SM15T15AHE3_A/I reliable?
The price and inventory of SM15T15AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T15AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHE3_A/I?
SM15T15AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHE3_A/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 SM15T15AHE3_A/I?
For technical support, including SM15T15AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHE3_A/I requirements.
6.How does Aetrix verify that SM15T15AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T15AHE3_A/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 SM15T15AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T15AHE3_A/I?
All SM15T15AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHE3_A/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 SM15T15AHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T15AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHE3_A/I Tags
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