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Vishay General Semiconductor - Diodes Division SM6T22A-E3/5B
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- Part No.:
- SM6T22A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22A-E3/5B.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,229
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Product details
Overview
SM6T22A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 30.6 V maximum clamping voltage (VC) at 20 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power electronics.
For engineers reviewing the SM6T22A-E3/5B datasheet, SM6T22A-E3/5B pinout, SM6T22A-E3/5B application, or SM6T22A-E3/5B equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, 100 °C/W junction-to-ambient thermal resistance, and RoHS-compliant commercial-grade construction with matte tin-plated leads.
Technical Context
The SM6T22A-E3/5B operates as a clamping-type TVS diode, triggering into avalanche conduction when transient voltage exceeds its 20.9–23.1 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at 18.8 V).
Designed for PCB-level surge protection, it delivers 600 W peak pulse power handling under standardized 10/1000 μs waveform conditions, with clamping performance validated at 20 A IPPM (10/1000 μs) and 30.6 V VC - critical for safeguarding 24 V rail interfaces and microcontroller I/O lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA test current - defines precise avalanche onset for reliable overvoltage detection |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ 20 A | 30.6 V - clamped voltage during 10/1000 μs transient, limiting stress on downstream 3.3 V/5 V logic |
| PPPM | 600 W - peak surge energy absorption capability under standard lightning/surge waveform |
| IFSM | 100 A - single half-sine surge current rating (10 ms), supporting high-energy inductive load switching |
| RθJA | 100 °C/W - thermal resistance to ambient on standard 5.0 mm × 5.0 mm copper pads, guiding heatsinking layout |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
Pinout & Package
SMB (DO-214AA) surface-mount package with cathode band marking; dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides low-impedance path to ground during transient clamping; must be routed with minimal inductance |
| Cathode | Current exit terminal in forward bias; marked by band; connects to protected line (e.g., 24 V supply or signal) | Defines unidirectional polarity - reverse-biased during normal operation, avalanches during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 24 V automotive systems |
| Glass passivated junction | Ensures stable VBR tolerance (±5 %), low leakage drift, and long-term reliability under thermal cycling |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., <100 ns rise time), improving clamping response |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance for global industrial and consumer applications without halogen restrictions |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤30.6 V, preventing damage to 36 V-rated input capacitors and controller ICs. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors from ESD and field wiring surges. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor PCB, mounted directly at connector pins. Use Value: Clamps 8/20 μs surges to ≤39.3 V while maintaining <1.0 μA leakage at 18.8 V, preserving signal accuracy. |
| Consumer Appliance Motor Control | Telecom Power Supply Input |
Use Scenario: Safeguarding gate drivers and MCU I/O in washing machine motor inverters exposed to brush-commutator noise and relay switching. IC Role / Device Role / Timing Role: TVS placed across half-bridge FET source-drain or at MCU GPIO lines tied to Hall-effect feedback. Use Value: Absorbs 600 W pulses without degradation, ensuring >100,000 surge cycles per JEDEC JESD22-A114E testing. | Use Scenario: Front-end protection for AC-DC adapter inputs in VoIP phones and base stations subjected to AC line surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device upstream of bridge rectifier and bulk capacitor. Use Value: Withstands 100 A IFSM (10 ms), surviving repeated 1 kV/500 A line surges without parametric shift. |
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, but lower PPPM = 400 W; VC = 35.5 V @ 17.1 A; higher clamping voltage | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not recommended for ISO 7637-2 Pulse 5a | Select SMAJ22A only if system-level surge testing confirms 400 W sufficiency and layout allows tighter thermal margin. |
| SMCJ22A | Higher PPPM = 1500 W in larger SMC (DO-214AB) package; VC = 35.5 V @ 42.3 A; 3× footprint area | Required where 1.5 kW surge immunity is mandated (e.g., heavy-duty industrial PLCs), but increases board space and cost | Choose SMCJ22A when SM6T22A-E3/5B fails system-level 10/1000 μs surge validation at full spec. |
Compared with SMAJ22A and SMCJ22A, SM6T22A-E3/5B delivers optimal balance of 600 W surge capacity, SMB footprint efficiency, and 30.6 V clamping in cost-sensitive automotive and industrial designs - neither underspecified nor over-engineered for mid-tier transient threats.
Availability
SM6T22A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and consumer appliance motor control requiring stable component supply and consistent RoHS-compliant manufacturing.
Supply support for SM6T22A-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 AEC-Q qualification.
The SM6T Series is designed specifically for surface-mount transient suppression in space-constrained, high-reliability applications - targeting 12 V/24 V automotive subsystems, industrial controls, and consumer electronics where low-profile SMB packaging and repeatable clamping performance are essential.
FAQ
What is the breakdown voltage range of the SM6T22A-E3/5B?
The SM6T22A-E3/5B 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 JESD22-A114E. This tight ±5 % tolerance ensures predictable clamping behavior across production lots and temperature ranges, making SM6T22A-E3/5B suitable for precision 24 V rail protection where overvoltage margin is critical.
Is the SM6T22A-E3/5B RoHS-compliant and halogen-free?
The SM6T22A-E3/5B carries the "E3" suffix, indicating RoHS-compliant construction per Directive 2011/65/EU, but it is not halogen-free. For halogen-free compliance, Vishay offers the SM6T22A-M3/5B variant. Both meet JESD201 Class 2 whisker resistance and J-STD-002 solderability standards, with matte tin-plated leads rated for 260 °C peak reflow.
What is the maximum clamping voltage of the SM6T22A-E3/5B under surge conditions?
The SM6T22A-E3/5B exhibits 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 Fig. 1 and Table 1 of Vishay document 88385 and defines the upper voltage limit imposed on protected circuits during standardized surge events - critical for ensuring compatibility with 36 V-rated downstream components.
Can the SM6T22A-E3/5B be used in automotive applications?
Yes, the SM6T22A-E3/5B is qualified for automotive use when ordered with the HE3 or HM3 suffix (e.g., SM6T22AHE3_B). The base SM6T22A-E3/5B is commercial-grade and AEC-Q101 unqualified, but shares identical electrical characteristics and SMB package. For production automotive designs, specify SM6T22AHE3_B/I to ensure full AEC-Q101 qualification and extended temperature validation.
What is the thermal resistance of the SM6T22A-E3/5B?
The SM6T22A-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 specified in Vishay document 88385. This value guides PCB layout decisions - reducing pad size or omitting thermal vias will increase RθJA, potentially derating power handling above 25 °C ambient.
SM6T22A-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:
- 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-E3/5B FAQ
1.How can I place an order for SM6T22A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22A-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 SM6T22A-E3/5B reliable?
The price and inventory of SM6T22A-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 SM6T22A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T22A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22A-E3/5B?
SM6T22A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22A-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 SM6T22A-E3/5B?
For technical support, including SM6T22A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22A-E3/5B requirements.
6.How does Aetrix verify that SM6T22A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T22A-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 SM6T22A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T22A-E3/5B?
All SM6T22A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22A-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 SM6T22A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T22A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22A-E3/5B Tags
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Diodes Incorporated
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