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Vishay General Semiconductor - Diodes Division SM15T24CAHE3/57T
- Part No.:
- SM15T24CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24CAHE3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,907
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Product details
Overview
SM15T24CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 24 V standoff voltage (VWM), and clamping voltage of 33.2 V at 45.0 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T24CAHE3/57T datasheet, SM15T24CAHE3/57T pinout, SM15T24CAHE3/57T application, or SM15T24CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 24 V VWM tolerance, low clamping ratio (1.38×VWM), and SMC package compatibility with automated placement.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with breakdown voltage VBR = 22.8–25.2 V (tested at 1 mA), clamping voltage VC = 33.2 V at IPPM = 45.0 A (10/1000 μs), and maximum reverse leakage ID = 1.0 μA at VWM = 20.5 V. Its thermal resistance RθJA is 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Designed for high-energy transient suppression, it features glass-passivated junction, low inductance, and MSL Level 1 moisture sensitivity. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification - critical for automotive-grade reliability in engine control modules and ADAS sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Confirmed symmetrical breakdown in both directions; defines turn-on threshold under surge |
| VC (Clamping Voltage) | 33.2 V at 45.0 A (10/1000 μs) - Limits downstream voltage during worst-case transient; ensures protected ICs stay within absolute max ratings |
| PPPM (Peak Pulse Power) | 1500 W - Sustains 10/1000 μs lightning surges per IEC 61000-4-5; enables robust protection without derating in typical PCB layouts |
| TJmax | 150 °C - Supports operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with J-STD-020 reflow profiles up to 260 °C peak |
Pinout & Package
SM15T24CAHE3/57T uses a 2-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional construction. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Interchangeable terminal; conducts equally in either direction during overvoltage events |
| Terminal 2 | Anode / Cathode (bidirectional) | Interchangeable terminal; forms symmetrical clamping path across protected line and ground or differential pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN FD, RS-485, sensor bridges) without polarity constraints |
| AEC-Q101 qualification | Validated for automotive applications including powertrain and chassis systems; supports 15-year lifecycle requirements and zero-defect manufacturing audits |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-earth) with margin when mounted on 8 mm × 8 mm copper pads |
| Low clamping ratio (1.38×VWM) | Minimizes voltage overshoot during fast transients; reduces stress on downstream 24 V-rated interface ICs and microcontrollers |
| MSL Level 1, 260 °C peak | Eliminates bake-out requirement prior to reflow; supports high-throughput SMT assembly without moisture-related popcorning |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting 24 V supply and analog output lines of wheel speed sensors and pressure transducers in engine bays exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor VSUPPLY/signal and chassis ground to limit transient excursions to ≤33.2 V. Use Value: Prevents latch-up or gate oxide damage in ASIC front-ends while maintaining signal integrity during 100 ns–1 ms transients. |
Use Scenario: Guarding RS-485 transceivers and PLC analog input channels against EFT bursts and lightning surges on factory floor wiring. IC Role / Device Role / Timing Role: Fast-response shunt device across differential bus lines (A/B) and common-mode ground to divert >1 kA surge energy. Use Value: Enables uninterrupted communication during 4 kV contact discharge events per IEC 61000-4-4, reducing field failure rates by >90% vs. unprotected designs. |
| Consumer Appliance Motor Control | Telecom Power Rail Protection |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machine control boards subjected to repeated 200 A switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor driver H-bridge supply rail to clamp voltage spikes before they reach gate drivers and MCU power pins. Use Value: Extends lifetime of 24 V motor control ICs by limiting VDS stress to <35 V during 100 μs–1 ms coil decay events. |
Use Scenario: Safeguarding 24 V DC-DC converter inputs in base station power supplies exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary-level transient suppressor placed upstream of input filter capacitors to absorb 1500 W surge energy before reaching active regulation stage. Use Value: Maintains regulated output stability during 10/1000 μs surges up to 45 A, preventing brownouts and system resets in mission-critical telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA-E3/57T | 600 W PPPM, same VWM/VC, SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy threats (IEC 61000-4-4 Level 3); unsuitable for 4 kV lightning surges | Select when board space is constrained and threat level is limited to EFT only |
| SMCJ24CAHE3/57T | 1500 W PPPM, identical VWM/VC, same SMC package but non-AEC-Q101 commercial grade | Not qualified for automotive use; lacks long-term reliability validation for temperature cycling and humidity exposure | Select for industrial or consumer applications where AEC-Q101 is not mandated |
Compared with SMAJ24CA-E3/57T, SM15T24CAHE3/57T delivers 2.5× higher surge energy handling and automotive qualification; compared with SMCJ24CAHE3/57T, it adds AEC-Q101 validation without sacrificing clamping performance or package compatibility.
Availability
SM15T24CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom power supply protection requiring stable component supply across multi-year production cycles.
Supply support for SM15T24CAHE3/57T 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and industrial equipment requiring IEC 61000-4-5 immunity.
FAQ
What does the "CA" suffix indicate in SM15T24CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration - meaning SM15T24CAHE3/57T provides symmetrical clamping in both polarities, unlike unidirectional variants ending in "A". This eliminates polarity concerns during layout and enables protection of AC-coupled or floating signal paths without external diode pairing.
Is SM15T24CAHE3/57T qualified for automotive applications?
Yes - the "HE3" suffix confirms SM15T24CAHE3/57T is RoHS-compliant and AEC-Q101 qualified. It has undergone stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life per AEC-Q101 standards, making it suitable for engine control, ADAS, and body electronics.
What is the clamping voltage of SM15T24CAHE3/57T at its rated peak pulse current?
SM15T24CAHE3/57T clamps to 33.2 V at 45.0 A peak pulse current (10/1000 μs waveform). This value is measured per Fig. 1 in Vishay document 88380 and defines the maximum voltage seen by downstream circuitry during standardized surge events.
How does the SMC (DO-214AB) package of SM15T24CAHE3/57T affect thermal performance?
Mounted on 8.0 mm × 8.0 mm copper pads, SM15T24CAHE3/57T achieves RθJA = 75 °C/W. The SMC package's large thermal pad area and low RθJL = 15 °C/W enable effective heat dissipation during repetitive transients, supporting sustained operation at TA ≤ 85 °C in sealed enclosures.
Can SM15T24CAHE3/57T replace unidirectional TVS diodes in existing designs?
No - SM15T24CAHE3/57T is strictly bidirectional and lacks cathode/anode marking. Replacing a unidirectional TVS (e.g., SM15T24AHE3/57T) requires verifying that the protected circuit tolerates symmetrical conduction and that grounding topology supports bidirectional clamping without unintended DC path formation.
SM15T24CAHE3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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)
SM15T24CAHE3/57T FAQ
1.How can I place an order for SM15T24CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24CAHE3/57T 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 SM15T24CAHE3/57T reliable?
The price and inventory of SM15T24CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T24CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24CAHE3/57T?
SM15T24CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24CAHE3/57T 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 SM15T24CAHE3/57T?
For technical support, including SM15T24CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24CAHE3/57T requirements.
6.How does Aetrix verify that SM15T24CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T24CAHE3/57T 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 SM15T24CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T24CAHE3/57T?
All SM15T24CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24CAHE3/57T, 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 SM15T24CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T24CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24CAHE3/57T Tags
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