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Vishay General Semiconductor - Diodes Division SM6T24AHE3/52
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- Part No.:
- SM6T24AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24AHE3/52.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,501
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Product details
Overview
SM6T24AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 24 V standoff voltage (VWM = 20.5 V), 33.2 V max clamping voltage at 18 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T24AHE3/52 datasheet, SM6T24AHE3/52 pinout, SM6T24AHE3/52 application, or SM6T24AHE3/52 equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, low-inductance SMB package, RoHS-compliant AEC-Q101 qualification, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
The SM6T24AHE3/52 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR min = 22.8 V). Its clamping action limits transient-induced overvoltage to ≤33.2 V at 18 A (10/1000 μs), protecting downstream ICs and MOSFETs from inductive switching spikes and ESD events.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, with derating above 25 °C ambient per Fig. 2. The device meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports 100 A non-repetitive forward surge (IFSM) for short-circuit fault tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.8 V / 25.2 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 33.2 V at 18 A - Clamped voltage during 10/1000 μs transient, limiting stress on protected circuitry |
| PPPM | 600 W - Peak transient energy absorption capability under standardized waveform |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with 0.220" × 0.130" footprint and matte tin leads |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., IFSM events) |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side; avalanche conduction initiates when VREV > VBR, shunting transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 Load Dump and IEC 61000-4-5 surge events without thermal runaway |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ESD), improving clamping response time |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns, reducing manufacturing risk |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring high reliability |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC-DC input. Use Value: Limits voltage to ≤33.2 V during 10/1000 μs surges, preventing damage to 36 V-rated regulators and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems. IC Role / Device Role / Timing Role: Reverse-biased protection element on signal lines exposed to relay coil flyback and EMI coupling. Use Value: Clamps induced spikes to <33.2 V while maintaining <1 μA leakage at 20.5 V, preserving signal integrity and ADC accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Secondary-side overvoltage suppression in universal-input AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-clamp TVS on +5 V/9 V/15 V output rails to absorb capacitor discharge and hot-plug transients. Use Value: Withstands 100 A IFSM and 600 W PPPM, ensuring survival during repeated 10/1000 μs surges without degradation. | Use Scenario: Protecting -48 V DC feeder lines in telecom base station power distribution units. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted between feed line and local regulator input. Use Value: Maintains 20.5 V standoff while clamping to 33.2 V, compatible with -48 V nominal systems using positive-ground architecture. |
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 | Same VWM (20.5 V) and VC (33.2 V), but 400 W PPPM (vs. 600 W); SMA package (larger RθJA = 120 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required | Select SMAJ24A only if board space allows larger SMA footprint and system-level surge testing confirms 400 W sufficiency |
| 1.5SMC24A | Same electrical specs (VWM, VBR, VC), but SMC package (higher IFSM = 200 A); RθJA = 15 °C/W with heatsink | Better thermal handling in high-ambient industrial enclosures; requires larger PCB pad area (7.11 mm × 6.22 mm) | Choose 1.5SMC24A when sustained surge duty cycle or elevated ambient (>85 °C) demands superior thermal dissipation |
Compared with SMAJ24A and 1.5SMC24A, the SM6T24AHE3/52 delivers optimal balance of 600 W surge capacity, AEC-Q101 qualification, SMB footprint compactness, and MSL Level 1 reflow compatibility-making it preferred for space-constrained automotive and industrial SMT designs.
Availability
SM6T24AHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer power adapters, and telecom DC feeder protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SM6T24AHE3/52 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, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and consistent surge endurance are critical.
FAQ
What is the maximum clamping voltage of the SM6T24AHE3/52 under standard test conditions?
The SM6T24AHE3/52 has a maximum clamping voltage (VC) of 33.2 V when subjected to an 18 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and ensures predictable overvoltage limiting for protected circuits. The SM6T24AHE3/52 maintains this clamping performance across its specified operating temperature range of -65 °C to +150 °C.
Is the SM6T24AHE3/52 suitable for automotive applications?
Yes, the SM6T24AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use, as confirmed by its HE3 suffix and documentation in Vishay's SM6T Series datasheet (Doc. #88385). The SM6T24AHE3/52 undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability requirements for powertrain, body control, and ADAS subsystems.
What does the "HE3" suffix indicate in SM6T24AHE3/52?
The "HE3" suffix in SM6T24AHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade E3 variants. Per Vishay's ordering nomenclature, HE3 indicates halogen-free, lead-free, and automotive-qualified status-verified in the Mechanical Data section of the SM6T24AHE3/52 datasheet revision 09-Jan-2024.
What is the thermal resistance from junction to ambient for the SM6T24AHE3/52?
The SM6T24AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table. This value assumes standard PCB layout; actual RθJA may improve with enhanced copper pour or thermal vias, but must be validated per application environment.
How does the SM6T24AHE3/52 differ from bidirectional TVS diodes like SM6T24CA?
The SM6T24AHE3/52 is unidirectional and conducts only in reverse breakdown, requiring correct polarity installation with cathode toward the protected circuit's higher potential. In contrast, SM6T24CA is bidirectional and symmetrical, suitable for AC lines or differential signals. The SM6T24AHE3/52 offers tighter VBR tolerance and lower leakage than its bidirectional counterpart, making it preferable for DC rail protection where polarity is fixed.
SM6T24AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, 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):
- 18A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T24AHE3/52 FAQ
1.How can I place an order for SM6T24AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24AHE3/52 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 SM6T24AHE3/52 reliable?
The price and inventory of SM6T24AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T24AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24AHE3/52?
SM6T24AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24AHE3/52 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 SM6T24AHE3/52?
For technical support, including SM6T24AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24AHE3/52 requirements.
6.How does Aetrix verify that SM6T24AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T24AHE3/52 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 SM6T24AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T24AHE3/52?
All SM6T24AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24AHE3/52, 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 SM6T24AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T24AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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