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Vishay General Semiconductor - Diodes Division SM6T30CA-E3/5B
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- Part No.:
- SM6T30CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30CA-E3/5B.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,040
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Product details
Overview
SM6T30CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 30 V standoff voltage (VWM), 33.2 V minimum breakdown (VBR), 600 W peak pulse power (10/1000 μs), and clamping voltage of 48.3 V at 12.3 A. It protects signal lines and power rails in automotive sensor interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T30CA-E3/5B datasheet, SM6T30CA-E3/5B pinout, SM6T30CA-E3/5B application, or SM6T30CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, 150 °C junction temperature rating, RoHS-compliant matte tin terminations, MSL Level 1 reflow compatibility, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR (33.2–36.8 V), VWM (27.0 V), and VC (48.3 V @ 12.3 A) in either direction. Its low-inductance SMB package and glass-passivated junction enable fast response (<1 ns) to transients while sustaining 100 A non-repetitive forward surge current (IFSM) in unidirectional test mode.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, requiring PCB copper pad area (0.2" × 0.2") per terminal for full 600 W pulse rating. The device meets JESD201 Class 2 whisker resistance and is rated for -65 °C to +150 °C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 27.0 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below system rail. |
| VBR min/max | 33.2 V / 36.8 V at 1.0 mA - Breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 48.3 V at 12.3 A (10/1000 μs) - Clamped voltage during worst-case surge; determines protected IC's voltage stress limit. |
| PPPM | 600 W - Peak transient energy absorption capability under standardized 10/1000 μs waveform. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" x 0.130" footprint; compatible with automated pick-and-place. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One side of symmetrical PN junction; conducts during negative transients. |
| Cathode | Transient current entry (positive polarity) | Other side of symmetrical PN junction; conducts during positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges without derating. |
| Bidirectional clamping symmetry | Enables single-device protection on AC-coupled or floating signal lines without polarity concerns. |
| MSL Level 1, 260 °C peak reflow | Permits standard lead-free SMT assembly without pre-baking or special handling. |
| Glass passivated chip junction | Ensures stable leakage current (<1.0 μA at VWM) and long-term reliability under humidity and bias stress. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller ADC inputs in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting transient excursions to ≤48.3 V during 10/1000 μs pulses. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic interfaces while maintaining signal integrity during normal operation. | Use Scenario: Guarding differential CAN_H/CAN_L lines against ESD (±15 kV contact) and burst noise in factory automation nodes. IC Role / Device Role / Timing Role: Fast-response (sub-ns) shunt element that diverts >12 A surge current away from transceiver I/O pins. Use Value: Maintains bus uptime by avoiding transceiver reset or permanent failure during repetitive industrial ESD events. |
| Consumer USB Power Delivery | Telecom DSL Line Interface |
Use Scenario: Safeguarding USB-C port VBUS and CC line circuitry against hot-plug transients and cable-induced surges. IC Role / Device Role / Timing Role: Standoff-rated (27.0 V) bidirectional clamp ensuring no conduction during 20 V PD negotiation, only during overvoltage faults. Use Value: Eliminates need for separate unidirectional TVS pairs, reducing BOM count and PCB area in space-constrained portable designs. | Use Scenario: Shielding ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: High-energy (600 W) clamping device placed at line interface transformer secondary side. Use Value: Limits induced surge voltage to <48.3 V, preserving signal integrity and preventing damage to low-voltage PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same SMB package, 33 V VWM, 36.7–40.6 V VBR, 400 W PPPM (lower energy handling) | Limited to lower-energy transients (IEC 61000-4-2 only); not suitable for ISO 7637-2 Pulse 5a load dump | Select when cost sensitivity outweighs peak surge requirement and system transients are less severe. |
| SMCJ33CA | Higher-power SMC package (2000 W PPPM), same 33 V VWM, larger footprint (7.11 mm × 6.22 mm) | Requires PCB redesign; suited for primary-side power rail protection where energy levels exceed 600 W | Choose when protecting 12 V/24 V battery rails directly and board space allows larger package. |
Compared with SMAJ33CA and SMCJ33CA, the SM6T30CA-E3/5B delivers optimal balance of 600 W surge capacity, SMB footprint, and bidirectional symmetry-making it ideal for secondary-side signal-line protection where space and energy requirements align precisely.
Availability
SM6T30CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and consumer USB-C power delivery systems requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SM6T30CA-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 designed specifically for surface-mount transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom applications where bidirectional clamping, high surge robustness, and AEC-Q101 readiness are mandatory.
FAQ
What is the standoff voltage rating of the SM6T30CA-E3/5B?
The SM6T30CA-E3/5B has a maximum reverse standoff voltage (VWM) of 27.0 V. This value represents the highest DC or continuous reverse voltage the device can withstand without entering breakdown, ensuring reliable operation below this threshold during normal system function. It is derived from the 30 V nominal designation and confirmed in the Vishay SM6T datasheet Table on page 2.
Is the SM6T30CA-E3/5B suitable for automotive applications?
Yes, the SM6T30CA-E3/5B is suitable for automotive applications as a protection component. While the base E3/5B variant is commercial-grade, the SM6T family offers AEC-Q101 qualified versions (e.g., SM6T30CAHE3_B/I) with identical electrical specs. Its 150 °C TJ max, MSL Level 1 reflow rating, and robust 600 W surge capability meet core requirements for under-hood and body-control module deployments.
What does the "CA" suffix indicate in SM6T30CA-E3/5B?
The "CA" suffix in SM6T30CA-E3/5B denotes a bidirectional configuration. Unlike unidirectional variants (e.g., SM6T30A), the CA version features symmetrical clamping characteristics in both polarities, enabling use on AC-coupled, floating, or differential signal paths without concern for orientation. This is explicitly stated in the Vishay SM6T datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
What is the clamping voltage of the SM6T30CA-E3/5B at its rated peak pulse current?
The SM6T30CA-E3/5B clamps to a maximum of 48.3 V at its rated peak pulse current of 12.3 A under the standard 10/1000 μs waveform. This VC value is measured per Figure 1 and Table on page 2 of the Vishay SM6T datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Does the SM6T30CA-E3/5B require a heatsink for normal operation?
No, the SM6T30CA-E3/5B does not require an external heatsink for transient suppression duty. Its 5.0 W steady-state power dissipation (PD) is managed through PCB copper pads (0.2" × 0.2" per terminal), and its RθJA of 100 °C/W is specified under those conditions. Continuous DC power dissipation must remain below 5.0 W; the device is intended for short-duration surge clamping, not sustained power handling.
SM6T30CA-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
SM6T30CA-E3/5B FAQ
1.How can I place an order for SM6T30CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30CA-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 SM6T30CA-E3/5B reliable?
The price and inventory of SM6T30CA-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 SM6T30CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T30CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30CA-E3/5B?
SM6T30CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30CA-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 SM6T30CA-E3/5B?
For technical support, including SM6T30CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30CA-E3/5B requirements.
6.How does Aetrix verify that SM6T30CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T30CA-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 SM6T30CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T30CA-E3/5B?
All SM6T30CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30CA-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 SM6T30CA-E3/5B part is unused and in its original packaging.
Return procedure for SM6T30CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30CA-E3/5B Tags
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