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Vishay General Semiconductor - Diodes Division SM15T24A-E3/57T
- Part No.:
- SM15T24A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24A-E3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,697
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Product details
Overview
SM15T24A-E3/57T 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 features 24 V stand-off voltage (VWM), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 45 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SM15T24A-E3/57T datasheet, SM15T24A-E3/57T pinout, SM15T24A-E3/57T application, or SM15T24A-E3/57T equivalent, key selection criteria include clamping performance under 45 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity with cathode band marking, RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T24A-E3/57T operates as a silicon avalanche diode that enters controlled breakdown above its 24 V stand-off threshold, limiting transient voltages to ≤33.2 V at 45 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling up to 200 A IFSM (10 ms half-sine).
Designed for surface-mount use in SMC package, it delivers low-inductance clamping with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation from −65 °C to +150 °C junction temperature. It meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 45 A (10/1000 μs) - Limits protected circuit voltage during worst-case surge; enables safe operation of 24 V logic and power stages. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains lightning-induced or inductive-switching surges per IEC 61000-4-5; validated on 8.0 mm × 8.0 mm copper pads. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive and industrial environments without derating below full rating. |
| RθJA | 75 °C/W - Defines thermal rise under steady-state power dissipation; requires adequate PCB copper area for 6.5 W PD operation. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line | Enables unidirectional clamping from cathode to anode; must be tied to ground or return path for proper TVS operation. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential line | Defines polarity-sensitive placement - reverse connection disables clamping function and risks device failure. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V DC rails without degradation when mounted per recommended pad layout. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 μA) over temperature and lifetime - critical for long-term reliability in sealed industrial enclosures. |
| Low inductance SMC package | Minimizes voltage overshoot during fast transients (e.g., ESD or relay bounce); supports sub-100 ns response time. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU; no exemptions required; suitable for global consumer and industrial production. |
Applications
| Automotive Power Supply Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VCC and GND to limit surge voltage to <33.2 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies downstream of DC/DC converters in vehicle ECUs. |
Use Scenario: Shielding analog input channels (4–20 mA, 0–10 V) on programmable logic controller modules from field-wiring transients. IC Role / Device Role / Timing Role: Primary surge suppression element on signal line entry, coordinated with series impedance and filtering. Use Value: Maintains signal integrity by clamping induced surges to ≤33.2 V before they reach precision ADC front-ends or op-amp buffers. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding -48 V telecom rectifier outputs and backup battery interfaces against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: High-power unidirectional TVS installed at power entry point, upstream of bulk capacitors and DC/DC stages. Use Value: Absorbs up to 1500 W transient energy without short-circuit failure, preserving system uptime during storm-related grid disturbances. |
Use Scenario: Protecting high-side and low-side gate drivers in 3-phase inverters from Miller-induced voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Localized clamping across driver supply rails (e.g., VDD-GND) to suppress ringing exceeding 24 V rating. Use Value: Eliminates false triggering and gate oxide stress by limiting rail excursions to 33.2 V, extending driver IC lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), same VWM (24 V), higher VC (38.9 V at 10.3 A), SMA package (smaller thermal mass) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or local switching noise | Select SMAJ24A only for space-constrained, low-surge-risk applications where 1500 W capability is unnecessary. |
| SMCJ24A | Same SMC package, identical VWM/VBR/VC specs, but rated for 3000 W PPPM (10/1000 μs) and higher IPPM (123 A) | Overqualified for standard 24 V industrial surges; adds cost and board area without benefit unless legacy design requires headroom | Choose SMCJ24A only if future-proofing against harsher threat levels (e.g., MIL-STD-1275E) or extended surge repetition is required. |
Compared with SMAJ24A and SMCJ24A, the SM15T24A-E3/57T delivers optimal balance of 1500 W surge capacity, compact SMC footprint, and precise 24 V clamping - making it the most cost-effective and thermally appropriate choice for mainstream 24 V automotive and industrial power protection.
Availability
SM15T24A-E3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power systems requiring stable component supply, RoHS compliance, and proven surge immunity per IEC 61000-4-5.
Supply support for SM15T24A-E3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in 12 V–220 V DC systems, targeting automotive, industrial, and telecom applications where robustness against lightning and inductive switching surges is mandatory.
FAQ
What is the clamping voltage of SM15T24A-E3/57T at its rated peak pulse current?
The SM15T24A-E3/57T has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45 A with a 10/1000 μs waveform. This value is measured under standardized test conditions using 8.0 mm × 8.0 mm copper pads per terminal and is guaranteed across the full operating temperature range.
Is SM15T24A-E3/57T suitable for automotive applications?
Yes, SM15T24A-E3/57T is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the E3/57T variant is commercial-grade and widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power supplies where 1500 W surge immunity and −65 °C to +150 °C operation are required.
What does the "E3/57T" suffix indicate in SM15T24A-E3/57T?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "57T" specifies packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel - optimized for high-volume SMT assembly lines using standard pick-and-place equipment.
How does SM15T24A-E3/57T differ from bidirectional TVS diodes like SM15T24CA?
SM15T24A-E3/57T is unidirectional and features a cathode band for polarity-sensitive placement, while SM15T24CA is bidirectional with no polarity marking and symmetric clamping in both directions. The unidirectional version offers lower leakage (<1.0 μA) and is preferred for DC power rail protection where reverse conduction must be blocked.
What is the thermal resistance of SM15T24A-E3/57T, and how does it affect PCB layout?
The SM15T24A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain safe operation at its 6.5 W steady-state power dissipation, PCB layout must provide ≥8.0 mm × 8.0 mm copper pad area per terminal, with internal ground/power planes preferred to reduce thermal impedance and prevent junction overheating.
SM15T24A-E3/57T 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T24A-E3/57T FAQ
1.How can I place an order for SM15T24A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24A-E3/57T 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 SM15T24A-E3/57T reliable?
The price and inventory of SM15T24A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T24A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24A-E3/57T?
SM15T24A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24A-E3/57T 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 SM15T24A-E3/57T?
For technical support, including SM15T24A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24A-E3/57T requirements.
6.How does Aetrix verify that SM15T24A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T24A-E3/57T 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 SM15T24A-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T24A-E3/57T?
All SM15T24A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24A-E3/57T, 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 SM15T24A-E3/57T part is unused and in its original packaging.
Return procedure for SM15T24A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24A-E3/57T Tags
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