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Vishay General Semiconductor - Diodes Division SM15T24AHE3/9AT
- Part No.:
- SM15T24AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24AHE3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,253
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Product details
Overview
SM15T24AHE3/9AT 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 = 20.5 V), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage at 45 A IPPM, and 1500 W peak pulse power rating with 10/1000 μs waveform - used to safeguard automotive ECUs, industrial I/O modules, and sensor interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T24AHE3/9AT datasheet, SM15T24AHE3/9AT pinout, SM15T24AHE3/9AT application, or SM15T24AHE3/9AT equivalent, key selection criteria include clamping performance under 45 A surge current, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T24AHE3/9AT operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its clamping behavior is defined by a 10/1000 μs waveform test condition, with guaranteed VC ≤ 33.2 V at IPPM = 45 A and ID ≤ 1.0 μA at VWM = 20.5 V.
It is rated for TJ = −65 °C to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and carries AEC-Q101 qualification - confirmed by HE3 suffix and Vishay documentation revision 09-Jan-2024 (Doc. #88380). Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.8–25.2 V at IT = 1.0 mA - ensures reliable avalanche initiation during transients without premature conduction |
| VC (Clamping Voltage) | 33.2 V at IPPM = 45 A (10/1000 μs) - limits downstream voltage stress to safe levels for 24 V rail ICs and MOSFETs |
| PPPM (Peak Pulse Power) | 1500 W - sustains single-event surges typical of ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 threats |
| TJ max. | +150 °C - enables use in under-hood automotive environments and thermally constrained industrial enclosures |
| RθJA | 75 °C/W - requires ≥8.0 mm × 8.0 mm copper pad per terminal for full derated power handling per datasheet Fig. 2 |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per HE3 suffix |
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching and lightning coupling without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream 24 V logic and interface ICs during surge events |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) and body control modules (BCMs) against ISO 7637-2 pulses and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤33.2 V, preventing damage to 36 V-rated input capacitors and enabling robust startup after ignition cycling. |
Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, or 4–20 mA loops) in factory automation sensors from ESD and motor-switching noise. IC Role / Device Role / Timing Role: Point-of-entry protection on sensor PCB edge connectors, paired with series impedance. Use Value: Clamps 45 A surge within 1 ns while maintaining <1.0 μA leakage at 20.5 V, preserving signal integrity and ADC accuracy. |
| Telecom Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding AC/DC adapter outputs and PoE-powered equipment inputs against surges entering via Ethernet or mains-derived DC rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V auxiliary power bus feeding PHY and management ICs. Use Value: Delivers 1500 W pulse handling with RθJA = 75 °C/W, allowing operation up to +85 °C ambient without derating in sealed enclosures. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge output nodes to absorb inductive kickback. Use Value: Withstands 200 A IFSM (10 ms half-sine), ensuring reliability across 100,000+ motor start-stop cycles per lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W), same VWM (20.5 V), SMC package but lower surge rating | Suitable only for lighter-duty consumer-grade transients; not rated for AEC-Q101 or ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs surge severity; verify IPPM ≤ 12.5 A in target threat model |
| 1.5KE24A | Higher VWM (20.5 V), same VBR range, but DO-201 package (larger footprint, higher inductance) | Not suitable for high-density SMT layouts; lacks AEC-Q101 qualification and MSL Level 1 rating | Choose only for legacy through-hole designs or where board space permits larger case and thermal relief is less critical |
Compared with SMAJ24A-E3/57T and 1.5KE24A, SM15T24AHE3/9AT delivers 3.75× higher peak pulse power in the same SMC footprint, includes automotive qualification, and supports automated high-volume assembly - making it the preferred choice for next-generation 24 V industrial and automotive systems requiring validated surge resilience.
Availability
SM15T24AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply and long-term lifecycle support.
Supply support for SM15T24AHE3/9AT 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, AEC-Q qualification, and high-power transient handling.
The SM15T Series was engineered specifically for high-energy surge suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W pulse capability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SM15T24AHE3/9AT at its rated peak pulse current?
The SM15T24AHE3/9AT has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current (IPPM) of 45 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay Document #88380, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T24AHE3/9AT qualified for automotive applications?
Yes, SM15T24AHE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and explicitly stated in the Vishay SM15T Series datasheet (Revision 09-Jan-2024, Doc. #88380). This qualification covers temperature cycling, humidity testing, and surge endurance required for under-hood and chassis-mounted automotive electronics.
What does the "9AT" suffix indicate in SM15T24AHE3/9AT?
The "9AT" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format is optimized for high-volume SMT placement and aligns with industry-standard feeder compatibility for automated assembly lines.
How does SM15T24AHE3/9AT differ from bidirectional versions like SM15T24CA?
SM15T24AHE3/9AT is unidirectional and features a cathode band for polarity identification, while SM15T24CA is bidirectional with no polarity marking. The unidirectional version provides lower leakage (<1.0 μA at 20.5 V) and is used where DC bias exists (e.g., 24 V supply rails); the bidirectional variant suits AC-coupled or symmetric signal lines like RS-485.
What thermal pad layout is required to achieve the full 1500 W rating for SM15T24AHE3/9AT?
To sustain the full 1500 W peak pulse power rating, SM15T24AHE3/9AT must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay Document #88380. Smaller pads reduce heat dissipation and require derating per Figure 2 - e.g., at TA = 75 °C, PPPM drops to ~1050 W with standard pad size.
SM15T24AHE3/9AT 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)
SM15T24AHE3/9AT FAQ
1.How can I place an order for SM15T24AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24AHE3/9AT 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 SM15T24AHE3/9AT reliable?
The price and inventory of SM15T24AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T24AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24AHE3/9AT?
SM15T24AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24AHE3/9AT 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 SM15T24AHE3/9AT?
For technical support, including SM15T24AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24AHE3/9AT requirements.
6.How does Aetrix verify that SM15T24AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T24AHE3/9AT 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 SM15T24AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T24AHE3/9AT?
All SM15T24AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24AHE3/9AT, 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 SM15T24AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T24AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24AHE3/9AT Tags
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