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Vishay General Semiconductor - Diodes Division SM6T22A-E3/52
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- Part No.:
- SM6T22A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22A-E3/52.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:488
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Product details
Overview
SM6T22A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1.0 mA), 30.6 V maximum clamping voltage (VC) at 20.0 A peak pulse current, 600 W peak pulse power (10/1000 μs), and 18.8 V stand-off voltage (VWM). It is widely used to protect MOSFETs and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SM6T22A-E3/52 datasheet, SM6T22A-E3/52 pinout, SM6T22A-E3/52 application, or SM6T22A-E3/52 equivalent, key selection considerations include its unidirectional polarity, 150 °C max junction temperature, low-inductance SMB package, RoHS-compliant matte tin terminals, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SM6T22A-E3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering precise voltage clamping during ESD and inductive switching events. Its 10/1000 μs waveform response ensures robust protection against lightning surges and load dump transients in DC power rails.
It exhibits low thermal resistance (RθJA = 100 °C/W, RθJL = 20 °C/W) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The cathode band marking enables unambiguous PCB orientation during automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20.0 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMB (DO-214AA) - surface-mount footprint with 5.59 mm × 4.06 mm body and 2.20 mm height for space-constrained layouts |
Pinout & Package
SM6T22A-E3/52 uses the SMB (DO-214AA) package: a two-terminal, unidirectional surface-mount device with cathode indicated by a visible band. The package has matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; enables normal circuit operation below VWM |
| Cathode | Current exit terminal; marked with band | Connected to higher-potential side (e.g., VCC rail); initiates avalanche clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports high-energy transient suppression without thermal runaway in automotive load-dump scenarios |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), critical for protecting high-speed interfaces |
| AEC-Q101 qualification option (HE3/HM3) | Enables direct use in automotive powertrain and body electronics without additional qualification effort |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load dump transients (up to 60 V, 100 ms) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and input filter capacitor. Use Value: Limits voltage seen by downstream DC/DC converters to ≤30.6 V, preventing overvoltage shutdown or damage. | Use Scenario: Protects analog output pins of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Standby protection device shunting induced ESD (IEC 61000-4-2 ±8 kV contact) away from precision amplifier inputs. Use Value: Maintains signal integrity by clamping transients within 1 ns, with <1.0 μA leakage at 18.8 V ensuring minimal offset error. |
| Consumer Power Adapter Input Stage | MOSFET Gate Driver Transient Suppression |
Use Scenario: Safeguards primary-side controller ICs in universal-input AC/DC adapters against line surges (IEC 61000-4-5 1 kV/2 Ω). IC Role / Device Role / Timing Role: Secondary-side TVS across bulk capacitor to clamp reflected surge energy. Use Value: Absorbs 600 W pulses without degradation, enabling compliance with UL 62368-1 surge immunity requirements. | Use Scenario: Prevents gate oxide rupture in N-channel power MOSFETs driven by isolated gate drivers in motor inverters. IC Role / Device Role / Timing Role: Low-inductance TVS placed between gate and source to clamp Miller-induced voltage spikes. Use Value: Clamps spikes to ≤30.6 V within nanoseconds, avoiding unintended turn-on and shoot-through failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same SMB package, 22 V VBR, but rated for 400 W PPPM (10/1000 μs) vs. 600 W | Limited to lower-energy transients; not recommended for automotive load dump per ISO 7637-2 Pulse 5a | Select SMAJ22A only for cost-sensitive consumer applications with verified <400 W surge exposure |
| 1.5SMC22A | Higher-power SMC package (7.11 mm × 6.22 mm), same 22 V VBR, 1500 W PPPM, larger footprint | Requires PCB redesign; suited for industrial UPS and telecom rectifier outputs with multi-kW surge risk | Choose 1.5SMC22A when system-level testing confirms >600 W surge threat and board space permits larger package |
Compared with SMAJ22A and 1.5SMC22A, SM6T22A-E3/52 delivers optimal balance of 600 W surge capability, SMB footprint compatibility, and AEC-Q101 upgrade path-making it preferred for space-constrained automotive and industrial modules requiring validated transient immunity without layout change.
Availability
SM6T22A-E3/52 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog I/O protection, and consumer power adapter input stages requiring stable component supply and RoHS-compliant sourcing.
Supply support for SM6T22A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SM6T Series is engineered specifically for robust transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where high-energy surge immunity and long-term stability are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T22A-E3/52?
The SM6T22A-E3/52 has a guaranteed breakdown voltage (VBR) range of 20.9 V to 23.1 V at a test current of 1.0 mA, measured per JEDEC standards. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage protection design in circuits where margin above nominal rail voltage must be strictly controlled. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, document 88385.
Is SM6T22A-E3/52 RoHS-compliant and halogen-free?
Yes, SM6T22A-E3/52 carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free versions, select the "M3" suffix variant (e.g., SM6T22A-M3/52). Both E3 and M3 meet JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Does SM6T22A-E3/52 have AEC-Q101 qualification?
SM6T22A-E3/52 itself is commercial-grade; however, the identical die in AEC-Q101-qualified form is available as SM6T22AHE3_X (e.g., SM6T22AHE3_A), using the "HE3" suffix. That variant undergoes extended stress testing including HTGB, H3TRB, and temperature cycling, and is approved for automotive powertrain and chassis applications per AEC-Q101 Rev D.
What is the maximum clamping voltage of SM6T22A-E3/52 under standard test conditions?
The maximum clamping voltage (VC) of SM6T22A-E3/52 is 30.6 V when subjected to a 10/1000 μs waveform at IPPM = 20.0 A. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards and represents the peak voltage seen by protected circuitry during worst-case surge events.
Can SM6T22A-E3/52 replace SMAJ22A in an existing design?
SM6T22A-E3/52 is physically pin-compatible with SMAJ22A (both SMB/DO-214AA), but offers higher 600 W peak pulse power versus SMAJ22A's 400 W. Replacement is feasible if board layout and thermal design accommodate the identical footprint and if the application demands ≥600 W surge handling-such as automotive load dump. Always verify clamping performance and thermal derating per actual surge profile before substitution.
SM6T22A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T22A-E3/52 FAQ
1.How can I place an order for SM6T22A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22A-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 SM6T22A-E3/52 reliable?
The price and inventory of SM6T22A-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 SM6T22A-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T22A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22A-E3/52?
SM6T22A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22A-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 SM6T22A-E3/52?
For technical support, including SM6T22A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22A-E3/52 requirements.
6.How does Aetrix verify that SM6T22A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T22A-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 SM6T22A-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T22A-E3/52?
All SM6T22A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22A-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 SM6T22A-E3/52 part is unused and in its original packaging.
Return procedure for SM6T22A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22A-E3/52 Tags
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