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Vishay General Semiconductor - Diodes Division SM6T24CA-E3/52
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- Part No.:
- SM6T24CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24CA-E3/52.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,825
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Product details
Overview
SM6T24CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 24 V standoff voltage (VWM), and clamping voltage of 33.2 V at 18 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T24CA-E3/52 datasheet, SM6T24CA-E3/52 pinout, SM6T24CA-E3/52 application, or SM6T24CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3 suffix), low clamping ratio (1.38×VWM), RoHS-compliant matte tin terminations, and MSL Level 1 reflow compatibility.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR = 25.2–28.4 V min/max at 1 mA) and clamping behavior. Its glass-passivated junction ensures stable leakage (<1 μA at 20.5 V) and robust surge handling up to 100 A IFSM (unidirectional only; not applicable here).
Designed for surface-mount placement on 5.0 mm × 5.0 mm copper pads, it delivers low-inductance transient suppression with thermal resistance RθJA = 100 °C/W and maximum junction temperature of +150 °C - enabling reliable operation in under-hood automotive and high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 25.2 / 28.4 V at 1 mA - Ensures consistent bidirectional breakdown threshold across production lots |
| VC @ IPPM | 33.2 V at 18 A (10/1000 μs) - Low clamping voltage limits stress on protected ICs during transients |
| PPPM | 600 W - Sustains high-energy surges typical of automotive load-dump or ISO 7637-2 pulses |
| ID @ VWM | <1 μA - Negligible standby leakage preserves battery life in always-on systems |
| Package | SMB (DO-214AA) - Standardized footprint compatible with automated pick-and-place and reflow processes |
| TJ max | +150 °C - Supports operation in engine-control modules and industrial motor drives |
Pinout & Package
SM6T24CA-E3/52 uses an SMB (DO-214AA) surface-mount package with two terminals and no polarity marking (bidirectional configuration). The device has no cathode/anode designation; both terminals are functionally identical for transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional transient path | Connects to protected line (e.g., CAN_H or LIN bus); conducts equally in either direction during overvoltage |
| Terminal 2 | Bidirectional transient path | Connects to reference plane (e.g., ground or power rail); completes low-inductance clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients per ISO 7637-2 Pulse 5a without degradation |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking |
| RoHS-compliant matte tin plating | Meets J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 requirements |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed automotive and industrial enclosures |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output line and chassis ground. Use Value: Limits transient voltage to ≤33.2 V, preventing damage to downstream signal-conditioning amplifiers and microcontrollers. | Use Scenario: Shielding CAN_H/CAN_L differential pair in factory automation PLCs from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) referenced to common ground. Use Value: Maintains signal integrity with <10 pF junction capacitance while clamping ±33.2 V surges without latch-up. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier inputs against lightning-induced surges on mains lines. IC Role / Device Role / Timing Role: Bidirectional shunt protector across bridge rectifier output. Use Value: Absorbs 600 W pulses without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV/12 Ω) | Use Scenario: Protecting Ethernet PHY interface pins on telecom base station line cards from induced surges on long copper runs. IC Role / Device Role / Timing Role: Point-of-entry TVS on each data line referenced to local ground plane. Use Value: Fast response (<1 ns) and low clamping enable continued packet transmission after surge event. |
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 | Same VWM (20.5 V), lower PPPM (400 W), SMA package (larger RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load-dump scenarios | Select when cost sensitivity outweighs peak power requirement and board space allows larger SMA footprint |
| 1.5KE24CA | Higher PPPM (1500 W), axial DO-201 package, higher VC (38.9 V), no MSL rating | Requires manual assembly; unsuitable for automated SMT lines or high-reliability reflow environments | Choose only for through-hole prototyping or legacy repair where PCB layout prohibits SMB placement |
Compared with SMAJ24CA and 1.5KE24CA, SM6T24CA-E3/52 offers optimal balance of 600 W surge capacity, SMB SMT compatibility, MSL Level 1 process support, and tight clamping - making it preferred for volume automotive and industrial designs requiring repeatable manufacturability and validated reliability.
Availability
SM6T24CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interfaces, consumer power adapter inputs, and telecom line card surge protection requiring stable component supply across multi-year production cycles.
Supply support for SM6T24CA-E3/52 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, precision, and automotive-grade qualification.
The SM6T Series is engineered specifically for robust transient suppression in harsh environments - targeting automotive electronics, industrial controls, and communications infrastructure where AEC-Q101 readiness and repeatable SMT performance are mandatory.
FAQ
What is the clamping voltage of SM6T24CA-E3/52 at its rated peak pulse current?
The SM6T24CA-E3/52 has a maximum clamping voltage (VC) of 33.2 V when subjected to its specified peak pulse current of 18 A using the 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88385 and reflects worst-case device behavior under standardized surge conditions. The clamping voltage directly determines the maximum stress imposed on downstream circuitry during transient events, making it a critical parameter for system-level overvoltage margin analysis in designs using SM6T24CA-E3/52.
Is SM6T24CA-E3/52 qualified to AEC-Q101 for automotive use?
SM6T24CA-E3/52 itself is RoHS-compliant commercial-grade; however, the SM6T24CA-HE3 variant (with HE3 suffix) is explicitly AEC-Q101 qualified per the Vishay ordering information table. The "E3" suffix denotes RoHS compliance but does not imply automotive qualification. To deploy SM6T24CA-E3/52 in automotive applications requiring AEC-Q101, users must select the HE3 or HM3 version - confirming qualification status via the full part number and associated Vishay certificate documentation for SM6T24CA-E3/52 is not applicable.
What is the junction-to-ambient thermal resistance (RθJA) of SM6T24CA-E3/52?
The typical junction-to-ambient thermal resistance (RθJA) of SM6T24CA-E3/52 is 100 °C/W, measured under standard conditions with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking and defines the steady-state temperature rise above ambient per watt of dissipated power. For reliable long-term operation, designers must ensure that power dissipation - especially under repetitive surge conditions - remains within derated limits defined by the thermal curve in Figure 2 of the Vishay SM6T datasheet 88385 when applying SM6T24CA-E3/52 in thermally constrained layouts.
Does SM6T24CA-E3/52 have polarity markings on the package?
No, SM6T24CA-E3/52 has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SM6T24A), which feature a cathode band, the "CA" suffix indicates symmetrical conduction in both directions - eliminating the need for orientation-specific placement. This simplifies PCB layout and automated assembly, as either terminal may connect to the protected line or reference plane without functional impact. The SMB package body is unmarked, consistent with Vishay's mechanical drawing for bidirectional SM6T devices.
What is the maximum reverse leakage current of SM6T24CA-E3/52 at its standoff voltage?
The maximum reverse leakage current (ID) of SM6T24CA-E3/52 is 1.0 μA when biased at its rated standoff voltage (VWM) of 20.5 V, tested at TA = 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered or energy-sensitive circuits, such as automotive body control modules or IoT sensor nodes. Leakage remains well below 10 μA even at elevated temperatures up to +125 °C, supporting stable operation in wide-temperature-range applications where SM6T24CA-E3/52 is commonly deployed.
SM6T24CA-E3/52 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:
- 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-E3/52 FAQ
1.How can I place an order for SM6T24CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24CA-E3/52 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 SM6T24CA-E3/52 reliable?
The price and inventory of SM6T24CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T24CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24CA-E3/52?
SM6T24CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24CA-E3/52 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 SM6T24CA-E3/52?
For technical support, including SM6T24CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24CA-E3/52 requirements.
6.How does Aetrix verify that SM6T24CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T24CA-E3/52 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 SM6T24CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T24CA-E3/52?
All SM6T24CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24CA-E3/52, 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 SM6T24CA-E3/52 part is unused and in its original packaging.
Return procedure for SM6T24CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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