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Vishay General Semiconductor - Diodes Division SM15T24AHE3/57T
- Part No.:
- SM15T24AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24AHE3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,786
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Product details
Overview
SM15T24AHE3/57T 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 standoff voltage (VWM), 33.2 V clamping voltage at 45 A peak pulse current (10/1000 μs), 1500 W peak pulse power rating, and AEC-Q101 qualification for automotive use - deployed to protect MOSFETs, ICs, and sensor interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T24AHE3/57T datasheet, SM15T24AHE3/57T pinout, SM15T24AHE3/57T application, or SM15T24AHE3/57T equivalent, key selection criteria include verified clamping performance at rated IPPM, unidirectional polarity with cathode band marking, SMC package thermal resistance (RθJL = 15 °C/W), and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The SM15T24AHE3/57T operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its breakdown voltage (VBR) is specified at 22.8–25.2 V (min/max) with 1 mA test current, and it maintains stable clamping up to 150 °C junction temperature.
Designed for high-impedance source environments, it limits peak pulse current to 45 A under 10/1000 μs waveform while delivering 33.2 V clamping voltage - ensuring protected downstream components remain below safe voltage thresholds during IEC 61000-4-5 Level 4 surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - precise avalanche initiation range ensures predictable turn-on during transients without premature leakage. |
| VC (Clamping Voltage) | 33.2 V at IPPM = 45 A (10/1000 μs) - guarantees downstream ICs see ≤33.2 V during worst-case surge, critical for 3.3 V/5 V logic protection. |
| PPPM (Peak Pulse Power) | 1500 W - supports robust immunity to lightning surges (IEC 61000-4-5) and industrial switching transients without degradation. |
| TJ max | 150 °C - enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance allows effective heat dissipation through PCB copper pads without heatsinks. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Molding compound meets UL 94 V-0. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for reverse-biased TVS operation | Connected to protected line (e.g., 24 V rail); conducts during positive transients to clamp voltage to VC. |
| Anode | Low-side reference terminal | Connected to ground or common return path; completes current path during transient suppression event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment. |
| Glass passivated chip junction | Ensures long-term stability and low leakage (<1 μA at VWM) across temperature and humidity stress conditions. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field performance. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce), improving clamping fidelity. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 24 V CAN/LIN bus interface circuits from load-dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply rail and ground, clamping surges before they reach MCU I/O or transceiver inputs. Use Value: Maintains system uptime by preventing latch-up or permanent damage to 3.3 V microcontrollers during ISO 7637-2 Pulse 5a/b events. |
Use Scenario: Shields 24 V digital input channels of programmable logic controllers from inductive kickback caused by solenoid/valve switching. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, absorbing >1 kV/100 A transients induced by relay coil de-energization. Use Value: Eliminates need for external RC snubbers and extends mean time between failures (MTBF) of input conditioning circuitry. |
| Telecom Power Supply Front-End | Automotive Sensor Signal Line Protection |
Use Scenario: Guards AC/DC converter auxiliary 24 V bias rails against lightning-induced surges entering via telecom line interfaces. IC Role / Device Role / Timing Role: Secondary-level TVS on DC output side, coordinated with upstream MOVs to provide staged surge attenuation. Use Value: Reduces risk of cascading failure in isolated feedback circuits and optocoupler drivers during Telcordia GR-1089-CORE Level 3 events. |
Use Scenario: Safeguards analog outputs of pressure/temperature sensors connected to 24 V vehicle battery systems. IC Role / Device Role / Timing Role: Localized clamping device mounted adjacent to sensor connector, limiting transient propagation into ADC front-end. Use Value: Preserves measurement accuracy by preventing input-stage saturation or ESD-induced offset drift in precision sensor signal chains. |
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-E3/57T | Lower PPPM (400 W), same VWM (24 V), SMA package (smaller footprint, higher RθJA = 100 °C/W) | Suitable for lower-energy threats (IEC 61000-4-2 ESD only); not rated for IEC 61000-4-5 lightning surges | Select when board space is constrained and surge threat level is limited to ±8 kV contact ESD. |
| SMCJ24AHE3/57T | Same SMC package, 3000 W PPPM, higher IPPM (129 A), identical VWM/VBR/VC specs | Used where higher surge margin is required (e.g., outdoor industrial gateways, EV charging station interfaces) | Choose when system-level testing requires ≥2× safety margin beyond IEC 61000-4-5 Level 4 (4 kV/2 Ω). |
Compared with SMAJ24A-E3/57T, SM15T24AHE3/57T delivers 3.75× higher surge energy handling in the same SMC footprint; versus SMCJ24AHE3/57T, it offers proven AEC-Q101 qualification and tighter VBR tolerance (±5% vs ±6.5%), making it preferred for automotive production programs with strict qualification traceability.
Availability
SM15T24AHE3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and telecom power supply protection requiring stable component supply, AEC-Q101 compliance, and 1500 W surge immunity.
Supply support for SM15T24AHE3/57T 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, power efficiency, and automotive-grade qualification.
The SM15T Series was developed specifically for high-power transient suppression in harsh-environment applications - targeting automotive, industrial automation, and infrastructure equipment where 1500 W surge capability and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T24AHE3/57T at its rated peak pulse current?
The SM15T24AHE3/57T has a maximum clamping voltage (VC) of 33.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 45 A. This value is measured per Figure 1 in Vishay document 88380 and ensures protected circuitry remains within safe voltage limits during standardized surge events.
Is SM15T24AHE3/57T qualified for automotive applications?
Yes, SM15T24AHE3/57T is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's SM15T series datasheet (Rev. 09-Jan-2024, Doc. #88380). This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock - validating suitability for under-hood and chassis-mounted automotive systems.
What does the "57T" suffix indicate in SM15T24AHE3/57T?
The "57T" suffix denotes the packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format supports automated SMT placement and is specified in Vishay's ordering information table for the SM15T Series.
How does SM15T24AHE3/57T differ from bidirectional variants like SM15T24CA?
SM15T24AHE3/57T is unidirectional with cathode band marking and blocks reverse current until breakdown; SM15T24CA is bidirectional, symmetrical in both polarities, and lacks polarity marking. The unidirectional version provides lower leakage at VWM (1 μA vs 5 μA for CA types) and is preferred for DC rail protection where polarity is fixed.
What is the thermal resistance from junction to lead (RθJL) for SM15T24AHE3/57T?
The SM15T24AHE3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as published in the Thermal Characteristics section of Vishay document 88380. This low value enables efficient heat transfer to PCB copper pads, supporting reliable operation at full power without external heatsinking.
SM15T24AHE3/57T 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T24AHE3/57T FAQ
1.How can I place an order for SM15T24AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24AHE3/57T 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 SM15T24AHE3/57T reliable?
The price and inventory of SM15T24AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T24AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24AHE3/57T?
SM15T24AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24AHE3/57T 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 SM15T24AHE3/57T?
For technical support, including SM15T24AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24AHE3/57T requirements.
6.How does Aetrix verify that SM15T24AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T24AHE3/57T 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 SM15T24AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T24AHE3/57T?
All SM15T24AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24AHE3/57T, 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 SM15T24AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T24AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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