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Vishay General Semiconductor - Diodes Division SM6T22CA-E3/5B
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- Part No.:
- SM6T22CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CA-E3/5B.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
SM6T22CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), and clamping voltage of 30.6 V at 20.0 A IPPM. It protects signal lines and MOSFET gates in automotive sensor units and industrial control interfaces.
For engineers reviewing the SM6T22CA-E3/5B datasheet, SM6T22CA-E3/5B pinout, SM6T22CA-E3/5B application, or SM6T22CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
The SM6T22CA-E3/5B implements a silicon avalanche diode structure optimized for fast response to ESD and lightning-induced transients. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
It delivers consistent clamping performance across -65 °C to +150 °C operating range, with thermal resistance RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, supporting reliable operation under repetitive surge stress when properly mounted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise voltage threshold where avalanche conduction begins in both directions |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20.0 A (10/1000 μs) - clamping voltage limiting protected circuit to safe level during surge |
| PPPM | 600 W - peak transient power handling capacity per single 10/1000 μs waveform |
| TJ max | +150 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| RθJA | 100 °C/W - thermal resistance indicating required PCB copper area for thermal management |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional device with symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | One terminal of bidirectional avalanche junction | Electrically identical to cathode; either terminal accepts transient voltage in either polarity |
| Cathode | Other terminal of bidirectional avalanche junction | Functionally interchangeable with anode; no band marking required per specification |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity orientation constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly laid out |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning or dry-pack requirements |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal cycling stress |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive-grade reliability testing for engine control and ADAS sensor modules |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load-dump and inductive switching transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair to clamp common-mode surges while preserving signal integrity. Use Value: Limits voltage excursion to ≤30.6 V during 20 A transients, preventing damage to 3.3 V/5 V transceiver inputs and maintaining bus communication uptime. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges and relay coil kickback. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, shunting energy before it reaches optocoupler or microcontroller input stage. Use Value: Withstands repeated 600 W pulses without degradation, extending system MTBF in factory automation environments with frequent electromagnetic disturbances. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding USB-C PD port protection ICs and E-Marker chips against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Secondary-level TVS located downstream of primary Y-capacitor filtering, providing fast-response clamping for sub-100 ns ESD strikes. Use Value: Low clamping voltage (30.6 V) ensures protected ICs remain below absolute maximum ratings even during ±8 kV contact discharge per IEC 61000-4-2. |
Use Scenario: Protecting analog front-end components on DSL or POTS line cards from lightning-induced longitudinal surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional suppression element placed between tip/ring lines and ground, absorbing common-mode energy before transformer coupling. Use Value: Symmetrical breakdown (20.9–23.1 V) ensures balanced clamping on both conductors, minimizing differential mode distortion during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | Same SMB package, identical VBR (20.9–23.1 V), but rated for 600 W with tighter VC tolerance (30.6 V vs. 31.0 V typical); slightly higher RθJA (110 °C/W) | Preferred where tighter clamping consistency is required across production lots; validated in telecom line card qualification tests | Select SMBJ22CA if design requires documented <1% VC variation or legacy qualification traceability to JEDEC JESD22-A114F |
| P6SMB22CA | Same electrical specs and SMB footprint, but manufactured by ON Semiconductor; VWM = 18.8 V, VC = 30.6 V at 20 A, RoHS-compliant E3 suffix available | Used in medical-grade power supplies where dual-sourcing is mandated; shares same UL 94 V-0 molding compound | Choose P6SMB22CA when supply chain diversification is required without layout or thermal redesign |
Compared with SM6T22CA-E3/5B, SMBJ22CA offers marginally tighter clamping control for high-reliability telecom systems, while P6SMB22CA provides second-source assurance with identical electrical behavior and mounting compatibility-both require no PCB changes but differ in manufacturer-specific reliability test reporting and long-term parametric drift profiles.
Availability
SM6T22CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and consumer power adapter interface designs requiring stable component supply, full RoHS compliance, and SMT-ready tape-and-reel packaging.
Supply support for SM6T22CA-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, and transient protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The SM6T Series was engineered specifically for robust, cost-effective transient suppression in space-constrained surface-mount applications across automotive, industrial, and communications infrastructure-balancing surge capability, thermal performance, and automated assembly compatibility.
FAQ
What is the breakdown voltage tolerance of SM6T22CA-E3/5B?
The SM6T22CA-E3/5B has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 22 V rating. This tolerance is measured per JEDEC JESD22-A114E using a 300 μs square-wave pulse, and applies identically in both directions due to its bidirectional construction.
Is SM6T22CA-E3/5B suitable for automotive applications?
The base SM6T22CA-E3/5B is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the SM6T22CA-HE3 variant (suffix HE3), which undergoes full AEC-Q101 stress testing including temperature cycling, HTRB, and ESD. The SM6T22CA-E3/5B itself is commonly used in non-safety-critical infotainment and body electronics where qualification is not mandated.
What is the maximum clamping voltage of SM6T22CA-E3/5B at rated peak pulse current?
The SM6T22CA-E3/5B clamps to a maximum of 30.6 V when subjected to its rated peak pulse current of 20.0 A under the standard 10/1000 μs waveform. This value is guaranteed per datasheet Table "ELECTRICAL CHARACTERISTICS" and verified with 0.2" × 0.2" copper pads per JEDEC test conditions.
Does SM6T22CA-E3/5B have polarity markings on the package?
No, SM6T22CA-E3/5B does not feature a cathode band or any polarity marking because it is a bidirectional device. Both terminals are functionally identical, and the device operates symmetrically regardless of voltage polarity-eliminating orientation concerns during automated placement.
What is the thermal resistance junction-to-ambient for SM6T22CA-E3/5B?
The SM6T22CA-E3/5B 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 defined in the Vishay datasheet Figure 2 derating curve and Thermal Characteristics table. This value assumes still air and standard FR-4 PCB construction.
SM6T22CA-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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SM6T22CA-E3/5B FAQ
1.How can I place an order for SM6T22CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CA-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 SM6T22CA-E3/5B reliable?
The price and inventory of SM6T22CA-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 SM6T22CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T22CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CA-E3/5B?
SM6T22CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CA-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 SM6T22CA-E3/5B?
For technical support, including SM6T22CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CA-E3/5B requirements.
6.How does Aetrix verify that SM6T22CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T22CA-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 SM6T22CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T22CA-E3/5B?
All SM6T22CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CA-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 SM6T22CA-E3/5B part is unused and in its original packaging.
Return procedure for SM6T22CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CA-E3/5B Tags
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