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Vishay General Semiconductor - Diodes Division SM6T22AHM3_B/H
- Part No.:
- SM6T22AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22AHM3_B/H.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,876
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Product details
Overview
SM6T22AHM3_B/H 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 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 electronics protection.
For engineers reviewing the SM6T22AHM3_B/H datasheet, SM6T22AHM3_B/H pinout, SM6T22AHM3_B/H application, or SM6T22AHM3_B/H equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, thermal resistance of 100 °C/W (junction-to-ambient), and halogen-free RoHS-compliant construction with M3 suffix.
Technical Context
The SM6T22AHM3_B/H operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to deliver fast response (<1 ns) to ESD and surge events. Its 600 W peak pulse rating (10/1000 μs) and low clamping ratio (VC/VBR ≈ 1.32) ensure robust protection of downstream ICs and MOSFETs without overvoltage stress.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (260 °C reflow peak) and supports operation from −65 °C to +150 °C junction temperature. The SMB package provides low inductance and compatibility with standard PCB pad layouts per Vishay's recommended 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise clamping onset threshold under standardized test conditions |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability without failure under standard waveform |
| IR @ VWM | ≤1.0 μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables reliable operation in under-hood automotive and industrial environments |
| RθJA | 100 °C/W - thermal performance baseline for board-level thermal design with standard pad layout |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or sensor output); band-marked end absorbs positive transients |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualified (HM3 suffix) | Validated reliability for automotive-grade deployment including engine control, body electronics, and ADAS sensors |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage performance across temperature and humidity stress |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 1 kV/ns), improving clamping fidelity |
| MSL Level 1 (260 °C) | Supports single-pass lead-free reflow without popcorn cracking or delamination risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on main power input rail. Use Value: Limits voltage to ≤30.6 V during 20 A surge, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Reverse-biased transient clamp on sensor signal line referenced to system ground. Use Value: Maintains signal integrity with <1 μA leakage at 18.8 V, while suppressing ±1 kV ESD per IEC 61000-4-2. |
| Consumer USB Power Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Guarding USB-C PD input stages in portable medical devices against hot-swap and cable-induced spikes. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between VBUS and GND prior to buck converter input. Use Value: Withstands 600 W surges without degradation, enabling compliance with UL 62368-1 transient immunity requirements. | Use Scenario: Shielding -48 V DC telecom power feeds from lightning-induced surges in remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on centralized DC distribution bus feeding multiple RF modules. Use Value: Delivers 30.6 V clamping at 20 A, reducing stress on downstream DC-DC converters rated for 36 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | Same VBR range (20.9–23.1 V), but 400 W PPPM; SMA package (higher RθJA = 130 °C/W) | Limited to lower-energy transients; less suitable for ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs peak surge margin and board space allows larger thermal pads |
| 1.5SMC22A | Same VBR, 1500 W PPPM, but SMC package (DO-214AB); higher mounting height and thermal mass | Better for high-reliability industrial power supplies where footprint is secondary to energy handling | Choose when system-level surge testing exceeds 600 W and PCB layout accommodates 7.1 mm width |
Compared with SMAJ22A-E3/5B and 1.5SMC22A, the SM6T22AHM3_B/H delivers optimal balance of AEC-Q101 qualification, 600 W capability, SMB footprint, and halogen-free compliance-making it preferred for space-constrained automotive and industrial modules requiring production traceability and extended temperature operation.
Availability
SM6T22AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power distribution systems requiring stable component supply, full AEC-Q101 documentation, and halogen-free RoHS compliance.
Supply support for SM6T22AHM3_B/H 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 validation.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 qualification are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T22AHM3_B/H?
The SM6T22AHM3_B/H has a guaranteed breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1 mA test current, as specified in Vishay's official datasheet (Doc. #88385, Rev. 09-Jan-2024). This tolerance ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 24 V nominal systems where overvoltage margins are tight. The SM6T22AHM3_B/H maintains this specification under AEC-Q101 stress conditions.
Is SM6T22AHM3_B/H suitable for automotive applications?
Yes, SM6T22AHM3_B/H is explicitly AEC-Q101 qualified (denoted by HM3 suffix), making it suitable for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. It undergoes stress testing for temperature cycling, humidity, and mechanical shock per AEC-Q101 requirements. The SM6T22AHM3_B/H also meets J-STD-020 MSL Level 1 for lead-free reflow, supporting automotive manufacturing flow.
What does the "HM3" suffix indicate in SM6T22AHM3_B/H?
The "HM3" suffix in SM6T22AHM3_B/H indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" denotes the tape-and-reel packaging option (750 units per reel), while "M3" confirms halogen-free molding compound and plating. This distinguishes it from commercial-grade "E3" or non-automotive "M3" variants. The SM6T22AHM3_B/H is fully traceable and certified for automotive production use.
What is the maximum clamping voltage of SM6T22AHM3_B/H at rated surge current?
The SM6T22AHM3_B/H has a maximum clamping voltage (VC) of 30.6 V at 20 A peak pulse current with a 10/1000 μs waveform, per Vishay's datasheet. This value represents the highest voltage imposed on the protected circuit during a standardized surge event. The low clamping ratio (VC/VBR ≈ 1.32) ensures effective protection of 24 V-rated components without overstressing their absolute maximum ratings.
How does SM6T22AHM3_B/H compare to SM6T22AHE3_B/H?
The SM6T22AHM3_B/H differs from SM6T22AHE3_B/H solely in environmental compliance: HM3 is halogen-free and RoHS-compliant, while HE3 is RoHS-compliant but not halogen-free. Both share identical electrical specs (VBR, VC, PPPM), AEC-Q101 qualification, and SMB package. The SM6T22AHM3_B/H is selected when halogen-free materials are mandated by OEM or regulatory requirements, such as in EU automotive supply chains.
SM6T22AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T22AHM3_B/H FAQ
1.How can I place an order for SM6T22AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22AHM3_B/H 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 SM6T22AHM3_B/H reliable?
The price and inventory of SM6T22AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T22AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22AHM3_B/H?
SM6T22AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22AHM3_B/H 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 SM6T22AHM3_B/H?
For technical support, including SM6T22AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22AHM3_B/H requirements.
6.How does Aetrix verify that SM6T22AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T22AHM3_B/H 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 SM6T22AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T22AHM3_B/H?
All SM6T22AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22AHM3_B/H, 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 SM6T22AHM3_B/H part is unused and in its original packaging.
Return procedure for SM6T22AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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