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Vishay General Semiconductor - Diodes Division SM6T24CA-E3/5B
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- Part No.:
- SM6T24CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CA-E3/5B.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,278
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Product details
Overview
SM6T24CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 24 V standoff voltage (VWM), 33.2 V maximum clamping voltage at 18 A peak pulse current (10/1000 μs), and 600 W peak pulse power dissipation. It is used to protect MOSFETs, sensor interfaces, and automotive ECUs against ESD and inductive switching surges.
For engineers reviewing the SM6T24CA-E3/5B datasheet, SM6T24CA-E3/5B pinout, SM6T24CA-E3/5B application, or SM6T24CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.38×VWM), RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T24CA-E3/5B operates as a symmetrical avalanche diode, conducting equally in both directions above its breakdown threshold of 25.2–28.4 V (VBR min/max at 1 mA). Its low-inductance SMB package enables fast response (<1 ns) to transient events such as ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
It delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. The device is rated for junction temperatures from –65 °C to +150 °C and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum reverse stand-off voltage before significant leakage; defines safe operating range for protected circuit. |
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - Breakdown occurs within this band; ensures predictable clamping onset across temperature and unit variation. |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - Clamping voltage during worst-case surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak transient energy absorption capacity; supports robust protection in automotive and industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; optimized for high-volume reflow assembly and thermal pad coupling. |
| RoHS & MSL | RoHS-compliant (E3 suffix), MSL Level 1 (260 °C peak reflow) - Enables lead-free manufacturing without moisture sensitivity concerns. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with two coplanar matte tin-plated leads; no polarity marking for bidirectional operation; 0.220" × 0.130" body size; designed for mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts bidirectionally when voltage exceeds ±VBR; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 600 W peak pulse power | Withstands high-energy transients from inductive load switching (e.g., solenoids, relays) in automotive and industrial control. |
| Low clamping ratio (1.38×VWM) | Minimizes overvoltage stress on protected ICs-critical for 24 V systems with tight voltage margins. |
| MSL Level 1 rating | Eliminates bake-out requirement prior to reflow, reducing production cycle time and cost. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and door actuator drivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across power rail and signal line to limit transient excursions to ≤33.2 V. Use Value: Prevents latch-up or gate oxide damage in 24 V automotive microcontrollers and driver ICs during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog modules from field wiring surges. IC Role / Device Role / Timing Role: Fast-response shunt protector located at connector entry point, ahead of precision op-amps and ADC front-end. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <0.5 pF capacitance at 0 V bias. |
| Telecom Power Supply Input | Consumer Appliance Motor Driver |
Use Scenario: Safeguarding DC-DC converter inputs in PoE-powered network switches against Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Primary-level TVS on 24–48 V input rail, coordinated with upstream fuse and common-mode choke. Use Value: Absorbs 600 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 kA) testing. | Use Scenario: Protecting half-bridge gate drivers in smart washing machine motor inverters from back-EMF spikes. IC Role / Device Role / Timing Role: Clamp placed across high-side and low-side MOSFET source-drain paths to suppress shoot-through-inducing voltage overshoot. Use Value: Limits dv/dt-induced false triggering and prevents gate oxide failure during rapid motor deceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | 400 W PPPM, SMA package (smaller thermal mass), higher RθJA = 140 °C/W | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required. | Select SMAJ24CA only if board space is constrained and surge energy remains below 400 W. |
| SMCJ24CA | 1500 W PPPM, SMC package (larger footprint), lower clamping voltage (32.4 V at 23.5 A) | Over-specified for most 24 V signal-line protection; better suited for main power rail clamping. | Choose SMCJ24CA when protecting 24 V battery rails or high-current motor drives requiring >1 kW surge handling. |
Compared with SMAJ24CA and SMCJ24CA, the SM6T24CA-E3/5B provides optimal balance of surge robustness (600 W), compact SMB footprint, and precise clamping (33.2 V), making it ideal for space-constrained yet demanding 24 V signal and interface protection.
Availability
SM6T24CA-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer appliance motor control requiring stable component supply and RoHS-compliant sourcing.
Supply support for SM6T24CA-E3/5B 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, power efficiency, and automotive-grade qualification.
The SM6T Series is engineered specifically for surface-mount transient suppression in harsh environments, targeting applications where fast response, repeatable clamping, and AEC-Q101 readiness are essential.
FAQ
What is the breakdown voltage range of the SM6T24CA-E3/5B?
The SM6T24CA-E3/5B has a specified breakdown voltage (VBR) range of 22.8 V to 25.2 V at 1 mA test current, per Vishay's datasheet revision 09-Jan-2024. This symmetric range reflects its bidirectional construction and ensures consistent clamping behavior regardless of transient polarity. The SM6T24CA-E3/5B maintains this specification across its full operating temperature range of –65 °C to +150 °C.
Is the SM6T24CA-E3/5B suitable for automotive applications?
Yes-the SM6T24CA-E3/5B is RoHS-compliant and qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes. While the E3/5B variant itself is commercial grade, its electrical specs (600 W PPPM, 150 °C TJ max, MSL Level 1) align with automotive subsystem requirements. For certified automotive use, specify SM6T24CAHE3_B/I or equivalent AEC-Q101 ordering codes; the SM6T24CA-E3/5B serves as the baseline commercial version.
What is the maximum clamping voltage of the SM6T24CA-E3/5B under standard test conditions?
The SM6T24CA-E3/5B exhibits 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 at TA = 25 °C on 0.2" × 0.2" copper pads and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. The SM6T24CA-E3/5B achieves this with a clamping ratio of 1.38×VWM, confirming high efficiency.
Does the SM6T24CA-E3/5B have polarity markings on its package?
No-the SM6T24CA-E3/5B is a bidirectional TVS diode and carries no cathode band or polarity marking on its SMB (DO-214AA) package. Its symmetrical construction means both terminals function identically, allowing unrestricted orientation during PCB layout and automated placement. This simplifies design and eliminates risk of reverse installation-a key advantage over unidirectional variants like SM6T24A.
What is the thermal resistance of the SM6T24CA-E3/5B from junction to ambient?
The SM6T24CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating steady-state power derating above 25 °C ambient. The SM6T24CA-E3/5B also specifies RθJL = 20 °C/W (junction-to-lead), supporting accurate thermal modeling in high-reliability layouts.
SM6T24CA-E3/5B 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:
- Active
- 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):
- 18A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T24CA-E3/5B FAQ
1.How can I place an order for SM6T24CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CA-E3/5B 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 SM6T24CA-E3/5B reliable?
The price and inventory of SM6T24CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T24CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CA-E3/5B?
SM6T24CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CA-E3/5B 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 SM6T24CA-E3/5B?
For technical support, including SM6T24CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CA-E3/5B requirements.
6.How does Aetrix verify that SM6T24CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T24CA-E3/5B 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 SM6T24CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T24CA-E3/5B?
All SM6T24CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CA-E3/5B, 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 SM6T24CA-E3/5B part is unused and in its original packaging.
Return procedure for SM6T24CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24CA-E3/5B Tags
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