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Vishay General Semiconductor - Diodes Division SM6T22AHE3/5B
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- Part No.:
- SM6T22AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22AHE3/5B.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
SM6T22AHE3/5B 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 mA), 30.6 V maximum clamping voltage (VC) at 20 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T22AHE3/5B datasheet, SM6T22AHE3/5B pinout, SM6T22AHE3/5B application, or SM6T22AHE3/5B equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, thermal resistance RθJA = 100 °C/W, and compliance with J-STD-020 MSL level 1.
Technical Context
The SM6T22AHE3/5B operates as a unidirectional clamping device with glass-passivated junction, optimized for fast response to ESD and surge events. Its 10/1000 μs waveform rating supports IEC 61000-4-5 Level 3/4 surge immunity, and its low inductance enables effective suppression of high-dI/dt transients on DC power rails and sensor interfaces.
Designed for surface-mount automated placement, it uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. The cathode band denotes polarity, and operation is specified over -65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines reliable conduction onset under surge conditions |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability per standardized waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C |
| TJ max | +150 °C - maximum allowable junction temperature for sustained reliability |
| AEC-Q101 | Qualified - validated for automotive-grade stress testing including HTOL, TC, and HTRB |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference | Completes clamping path when transient exceeds VBR; must be routed with minimal inductance |
| Cathode | Current exit point in forward bias; connected to protected line | Marked by band; carries full surge current to ground during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 surges up to 4 kV (line-earth) without failure |
| Glass passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for automotive reliability |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-induced damage |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-defect field performance |
| Low inductance layout | Minimizes V = L·di/dt overshoot during fast transients, preserving clamping effectiveness |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges. Use Value: Limits voltage to ≤30.6 V during 20 A surge, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Clamping induced transients on 0–10 V or 4–20 mA signal paths exposed to relay switching noise. Use Value: Maintains signal integrity by suppressing >1 kV EFT bursts while adding <1 pF capacitance at 0 V bias. |
| Consumer USB Power Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Safeguarding USB-C PD input stages in portable medical devices against hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Front-end unidirectional suppressor on VBUS line, upstream of buck converter and load switch. Use Value: Withstands 100 A IFSM surge and clamps to 30.6 V, ensuring no latch-up or permanent degradation after repeated ESD strikes. | Use Scenario: Protecting 48 V DC power feeds in remote radio units (RRUs) from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with GDT and MOV for staged surge handling. Use Value: Provides precise 18.8 V stand-off and rapid response (<1 ns), enabling coordination with slower secondary protectors. |
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 VBR range (20.9–23.1 V), but 400 W PPPM and non-AEC-Q101 rated | Limited to commercial/industrial use; not qualified for automotive underhood environments | Select SMAJ22A only if AEC-Q101 is not required and 600 W headroom is unnecessary |
| 1.5SMC22A | Higher PPPM (1500 W), larger SMC package (DO-214AB), same VBR/VC specs | Requires larger PCB footprint; better suited for higher-energy surges where space permits | Choose 1.5SMC22A when system-level surge tests exceed IEC 61000-4-5 Level 4 or require >600 W margin |
Compared with SMAJ22A and 1.5SMC22A, the SM6T22AHE3/5B uniquely balances AEC-Q101 qualification, SMB footprint, and 600 W capability-making it optimal for space-constrained automotive modules needing certified reliability without board redesign.
Availability
SM6T22AHE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power inputs, and telecom DC feeder lines requiring stable component supply and long-term lifecycle support.
Supply support for SM6T22AHE3/5B 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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the SM6T22AHE3/5B under standard test conditions?
The SM6T22AHE3/5B has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform at 20 A peak pulse current. This value is measured per JEDEC standards and ensures protected circuits remain below critical overvoltage thresholds during surge events. The SM6T22AHE3/5B maintains this clamping performance across its full operating temperature range.
Is the SM6T22AHE3/5B suitable for automotive applications?
Yes, the SM6T22AHE3/5B is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay documentation. It undergoes rigorous stress testing-including high-temperature operating life, temperature cycling, and humidity bias-to meet automotive reliability requirements. The SM6T22AHE3/5B is approved for use in engine control, body electronics, and ADAS modules where transient immunity and zero-defect field performance are essential.
What does the "HE3" suffix indicate in SM6T22AHE3/5B?
The "HE3" suffix in SM6T22AHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes this variant from commercial-grade E3 or M3 versions and confirms compliance with automotive-grade whisker resistance (JESD 201 Class 2) and reflow profile (MSL Level 1, 260 °C peak).
How does the SMB (DO-214AA) package of the SM6T22AHE3/5B compare to SMA in size and thermal performance?
The SMB package of the SM6T22AHE3/5B measures 3.94 mm × 2.20 mm × 1.75 mm, slightly larger than SMA (DO-214AC) but smaller than SMC. Its RθJA is 100 °C/W (on 0.2" × 0.2" copper pads), compared to ~120 °C/W for SMA-giving the SM6T22AHE3/5B better thermal dissipation in compact layouts. The SMB's lower profile also improves board-level mechanical stability.
Can the SM6T22AHE3/5B be used in bidirectional configurations?
No, the SM6T22AHE3/5B is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SM6T22CA). Using the SM6T22AHE3/5B in reverse-biased configurations risks premature breakdown or failure, since its design and characterization apply only to forward conduction from cathode to anode during clamping.
SM6T22AHE3/5B 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T22AHE3/5B FAQ
1.How can I place an order for SM6T22AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22AHE3/5B 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 SM6T22AHE3/5B reliable?
The price and inventory of SM6T22AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22AHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T22AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22AHE3/5B?
SM6T22AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22AHE3/5B 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 SM6T22AHE3/5B?
For technical support, including SM6T22AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22AHE3/5B requirements.
6.How does Aetrix verify that SM6T22AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T22AHE3/5B 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 SM6T22AHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T22AHE3/5B?
All SM6T22AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22AHE3/5B, 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 SM6T22AHE3/5B part is unused and in its original packaging.
Return procedure for SM6T22AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22AHE3/5B Tags
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