My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T15AHE3/57T
- Part No.:
- SM15T15AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15AHE3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,041
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T15AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 21.2 V under 71 A peak pulse current, and features 12.8 V stand-off voltage with <1.0 μA leakage at 25 °C - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SM15T15AHE3/57T datasheet, SM15T15AHE3/57T pinout, SM15T15AHE3/57T application, or SM15T15AHE3/57T equivalent, key selection criteria include clamping voltage vs. IPPM, unidirectional polarity marking, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and SMC package compatibility with automated placement.
Technical Context
The SM15T15AHE3/57T operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its breakdown voltage is specified at 14.3–15.8 V (IT = 1.0 mA), and it maintains stable clamping up to TJ = 150 °C with derated pulse capability above 25 °C ambient.
Designed for high-impedance source environments, it limits surge current within its 71 A IPPM rating when subjected to lightning-induced or inductive-switching transients. Failure mode under overstress is short-circuit, consistent with IEC 61000-4-5 Level 4 compliance requirements for system-level ESD and surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single high-energy surges without degradation, suitable for IEC 61000-4-5 line protection |
| Stand-off Voltage (VWM) | 12.8 V - maximum continuous reverse voltage before significant leakage; sets operating margin below breakdown |
| Breakdown Voltage (VBR) | 14.3–15.8 V at 1.0 mA - defines precise avalanche onset threshold for predictable clamping initiation |
| Clamping Voltage (VC) | 21.2 V at 71 A - limits downstream voltage during surge, protecting 24 V logic and gate drivers |
| Peak Pulse Current (IPPM) | 71 A (10/1000 μs) - quantifies maximum transient current the device can safely divert |
| Junction Temperature Range | −65 to +150 °C - enables operation in under-hood automotive and industrial environments |
| Thermal Resistance (RθJA) | 75 °C/W - determines required PCB copper area (8.0 mm × 8.0 mm pads per terminal) for thermal management |
Pinout & Package
SM15T15AHE3/57T uses the SMC (DO-214AB) surface-mount package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, and MSL Level 1 rated for reflow up to 260 °C peak. Polarity is marked by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional TVS configuration | Connected to ground or low-impedance return path; completes conduction path during reverse-biased surge |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 12 V supply rail); conducts avalanche current into anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 4 kV surge events on 24 V bus lines |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream components while maintaining robust surge handling |
| Glass-passivated junction | Ensures long-term reliability and stable electrical parameters across temperature and humidity cycling |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control modules from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Clamps transients to ≤21.2 V, preventing damage to 28 V-rated buck controllers and ensuring ASIL-B system integrity. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt induced noise from motor drive cables. Use Value: Limits coupled spikes to <22 V, preserving 16-bit ADC accuracy and avoiding false trigger in 4–20 mA loop receivers. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary surge clamp on main DC input before hot-swap controller and backup capacitor. Use Value: Absorbs 1500 W pulses without failure, maintaining uptime during outdoor installation surges per ITU-T K.21 Basic Level. |
Use Scenario: Suppressing back-EMF from brushed DC motors in smart home vacuum cleaners. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kick during PWM commutation. Use Value: Prevents >30 V transients from reaching MCU GPIOs and H-bridge drivers, eliminating firmware lockups and MOSFET avalanche stress. |
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 | 600 W PPPM, SMA package, same VWM/VBR but lower IPPM (32.4 A) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); not suitable for lightning surges | Select when board space is constrained and surge threat level is ≤1 kV, 500 W. |
| SMCJ15AHE3/57T | Same SMC package and 1500 W rating, but higher VC (23.2 V at 64.5 A) and wider VBR tolerance (14.3–17.1 V) | Less precise clamping margin for 12 V systems; higher thermal mass slows response slightly | Prefer when cost sensitivity outweighs tight clamping voltage requirement and AEC-Q101 is not mandatory. |
Compared with SMAJ15A-E3/57T and SMCJ15AHE3/57T, SM15T15AHE3/57T offers tighter VBR tolerance (±5%), lower clamping voltage (21.2 V), and AEC-Q101 qualification - making it optimal for automotive 12 V power rail protection where precision and reliability are critical.
Availability
SM15T15AHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply across extended production lifecycles.
Supply support for SM15T15AHE3/57T 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 protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SM15T Series was developed specifically for high-power transient suppression in harsh environments, targeting AEC-Q101-compliant automotive electronics and industrial equipment exposed to lightning and inductive switching surges.
FAQ
What is the clamping voltage of SM15T15AHE3/57T at its rated peak pulse current?
The SM15T15AHE3/57T has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated 71 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T15AHE3/57T qualified for automotive applications?
Yes, SM15T15AHE3/57T is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification confirms its suitability for automotive use cases including engine control, body electronics, and ADAS sensor modules, with validated performance across temperature cycling, humidity, and mechanical shock testing per the AEC standard.
What does the "57T" suffix mean in SM15T15AHE3/57T?
The "57T" suffix in SM15T15AHE3/57T denotes the preferred packaging format: 7-inch diameter plastic tape and reel, containing 850 units per reel. This format supports automated SMT placement and is compatible with standard pick-and-place equipment used in high-volume manufacturing.
How does SM15T15AHE3/57T differ from SM15T15A-E3/57T?
SM15T15AHE3/57T includes AEC-Q101 qualification and RoHS compliance, whereas SM15T15A-E3/57T is commercial-grade only. Both share identical electrical specs and SMC packaging, but the HE3 version undergoes additional automotive reliability testing and is intended for mission-critical vehicle systems where qualification traceability is required.
What is the thermal resistance of SM15T15AHE3/57T, and how does it affect layout?
The SM15T15AHE3/57T 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 under repeated surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks near the device body.
SM15T15AHE3/57T 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 (SMCJ)
SM15T15AHE3/57T FAQ
1.How can I place an order for SM15T15AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15AHE3/57T 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 SM15T15AHE3/57T reliable?
The price and inventory of SM15T15AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T15AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15AHE3/57T?
SM15T15AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15AHE3/57T 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 SM15T15AHE3/57T?
For technical support, including SM15T15AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15AHE3/57T requirements.
6.How does Aetrix verify that SM15T15AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T15AHE3/57T 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 SM15T15AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T15AHE3/57T?
All SM15T15AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15AHE3/57T, 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 SM15T15AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T15AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15AHE3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
