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Vishay General Semiconductor - Diodes Division SM15T24AHM3/I
- Part No.:
- SM15T24AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T24AHM3/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,280
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Product details
Overview
SM15T24AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 24 V standoff voltage (VWM), 25.2 V minimum breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 45 A IPPM, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM15T24AHM3/I datasheet, SM15T24AHM3/I pinout, SM15T24AHM3/I application, or SM15T24AHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance under standardized surge waveforms, and halogen-free RoHS-compliant construction details.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed for low-inductance transient suppression on PCB traces carrying sensitive analog or digital signals. Its glass-passivated junction ensures stable breakdown behavior and long-term reliability under repetitive surge stress.
The device meets J-STD-020 MSL Level 1 moisture sensitivity and supports lead-free reflow up to 260 °C peak. With TJ max = 150 °C and RθJL = 15 °C/W, it sustains high-energy pulses when mounted on 8.0 mm × 8.0 mm copper pads per terminal - critical for automotive-grade ESD and lightning-induced transient protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum reverse working voltage before leakage exceeds 1 μA; defines safe operating range for continuous DC bias. |
| VBR (min) | 22.8 V - Minimum breakdown voltage at 1 mA test current; ensures reliable conduction onset during overvoltage events. |
| VC @ IPPM | 33.2 V at 45 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust protection against lightning-induced surges and inductive kickback. |
| TJ max | 150 °C - Maximum junction temperature; supports operation in under-hood automotive environments without derating. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs board-level thermal design for sustained power dissipation. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated placement and reflow processes. |
Pinout & Package
SM15T24AHM3/I uses the standard SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, 0.320" (8.13 mm) body length, 0.246" (6.22 mm) body width, and cathode band marking on one end. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated IPPM performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-voltage reference; completes clamping path during reverse-biased transient events. |
| Cathode | High-side connection; marked by band | Connected to protected line (e.g., sensor supply or signal trace); conducts avalanche current when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment power rails. |
| Halogen-free, RoHS-compliant construction | Meets automotive OEM material compliance requirements and supports environmentally regulated production programs. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot across protected components, reducing risk of latch-up or gate oxide damage in MOSFETs. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports standard lead-free assembly processes without moisture-related failures. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus transceivers and Hall-effect sensor outputs in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor VCC line and chassis ground to shunt transients above 20.5 V. Use Value: Limits clamped voltage to ≤33.2 V during 45 A surges, preventing damage to 3.3 V/5 V interface ICs while maintaining signal integrity. | Use Scenario: Safeguarding PLC analog input channels connected to 24 V field transmitters subject to relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector on 24 V supply rail upstream of LDO regulators and ADC front-ends. Use Value: Absorbs 1500 W surge energy without degradation, preserving measurement accuracy and avoiding system resets during industrial switching noise events. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Shielding PoE-powered Ethernet PHYs and DC-DC converters from induced surges on AC/DC adapter inputs. IC Role / Device Role / Timing Role: Primary-stage TVS on 24 V auxiliary rail feeding isolated data interfaces. Use Value: Achieves <100 ns response time and <33.2 V clamping, ensuring PHY ICs remain within absolute maximum ratings during fast-rising transients. | Use Scenario: Securing microcontroller GPIOs and relay drivers in smart washing machine control boards subjected to pump motor commutation spikes. IC Role / Device Role / Timing Role: Localized clamping element on 12 V logic supply net adjacent to motor driver ICs. Use Value: Withstands 200 A IFSM non-repetitive surge, enabling single-device protection without fusing or additional passive filtering. |
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), larger SMA package (DO-214AC), no AEC-Q101 qualification | Not suitable for automotive under-hood use; limited to consumer/industrial low-energy I/O protection | Select only if cost sensitivity outweighs surge robustness and automotive compliance requirements. |
| 1.5KE24A | Through-hole DO-201 package, 1500 W rating, but higher VC (38.9 V), no halogen-free option, MSL Level 1 not guaranteed | Requires manual assembly or wave soldering; unsuitable for high-density SMT layouts | Choose only for legacy through-hole designs where board real estate and reflow compatibility are not constraints. |
Compared with SMAJ24A-E3/57T and 1.5KE24A, SM15T24AHM3/I delivers superior surge margin (1500 W vs. 400 W), automotive-grade qualification, halogen-free compliance, and optimized SMC footprint - making it the preferred choice for new SMT-based automotive and industrial designs requiring high-reliability transient immunity.
Availability
SM15T24AHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 validated performance.
Supply support for SM15T24AHM3/I 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 efficiency, and application-specific optimization.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be controlled and clamping precision is critical to system-level safety.
FAQ
What is the clamping voltage of SM15T24AHM3/I at its rated peak pulse current?
The SM15T24AHM3/I has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current (IPPM) of 45 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet document 88380. The clamping voltage directly determines the maximum stress applied to downstream components during surge events, making it a key parameter for circuit protection validation.
Is SM15T24AHM3/I qualified for automotive applications?
Yes, SM15T24AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number. This qualification confirms that the device has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronic systems. It is intended for use in engine control units, ADAS sensors, and body electronics where reliability under extreme thermal and electrical conditions is mandatory.
What does the "HM3" suffix mean in SM15T24AHM3/I?
The "HM3" suffix in SM15T24AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" refers to the JEDEC-standard whisker resistance class per JESD 201. This combination ensures compliance with automotive OEM material specifications and environmental regulations while supporting high-reliability operation.
Can SM15T24AHM3/I be used in bidirectional configurations?
No, SM15T24AHM3/I is a unidirectional TVS diode, as confirmed by its "A" suffix and cathode-band marking. Bidirectional variants in the SM15T series use the "CA" suffix (e.g., SM15T24CA). Using SM15T24AHM3/I in bidirectional applications would result in forward conduction during negative transients, potentially causing failure or incorrect clamping behavior. Always select the CA-suffixed version for AC-coupled or symmetrical surge protection.
What is the thermal resistance of SM15T24AHM3/I, and how does it affect layout design?
SM15T24AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values require PCB layout with minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated pulse power performance. Insufficient copper area increases thermal impedance, leading to premature thermal runaway during repeated surge events - especially critical in automotive under-hood applications where ambient temperatures exceed 85 °C.
SM15T24AHM3/I 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 (SMC)
SM15T24AHM3/I FAQ
1.How can I place an order for SM15T24AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T24AHM3/I 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 SM15T24AHM3/I reliable?
The price and inventory of SM15T24AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T24AHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T24AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T24AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T24AHM3/I?
SM15T24AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T24AHM3/I 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 SM15T24AHM3/I?
For technical support, including SM15T24AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T24AHM3/I requirements.
6.How does Aetrix verify that SM15T24AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T24AHM3/I 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 SM15T24AHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T24AHM3/I?
All SM15T24AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T24AHM3/I, 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 SM15T24AHM3/I part is unused and in its original packaging.
Return procedure for SM15T24AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T24AHM3/I Tags
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