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Vishay General Semiconductor - Diodes Division SM6T220AHM3/H
- Part No.:
- SM6T220AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T220AHM3/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,991
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Product details
Overview
SM6T220AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 220 V breakdown voltage (VBR), 328 V maximum clamping voltage (VC) at 2.0 A IPPM, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive-grade surge protection on power rails and signal lines.
For engineers reviewing the SM6T220AHM3/H datasheet, SM6T220AHM3/H pinout, SM6T220AHM3/H application, or SM6T220AHM3/H equivalent, key selection criteria include unidirectional polarity, 188 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS-compliant construction with M3 suffix.
Technical Context
The SM6T220AHM3/H operates as a clamping-type overvoltage protector using an avalanche junction to divert transient energy away from downstream circuitry. Its glass-passivated chip junction ensures stable breakdown behavior under repetitive surges, and its low-inductance SMB package supports fast response to ESD and lightning-induced transients.
Designed for unidirectional operation, it features cathode-band polarity marking and is characterized per JEDEC standards with 10/1000 μs waveform testing. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature without derating on standard PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 209 V / 231 V at 1.0 mA test current - defines precise avalanche onset range for consistent clamping threshold |
| VWM | 188 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 328 V at 2.0 A (10/1000 μs) - clamping voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power dissipation capability without failure under standardized surge waveform |
| TJ max | +150 °C - maximum allowable junction temperature supporting under-hood automotive use |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for automated assembly |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC specification |
Pinout & Package
SMB (DO-214AA) package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on body; no polarity marking for bidirectional variants (not applicable to SM6T220AHM3/H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal during forward conduction; clamping node during reverse transients | Marked with band; connected to higher-potential rail (e.g., VIN or signal line); absorbs surge energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without thermal runaway |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal stress |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time), critical for high-speed signal line protection |
| AEC-Q101 qualification (HM3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to ±100 V. Use Value: Clamps to 328 V at 2.0 A, limiting stress on downstream DC-DC converters and microcontrollers while surviving 600 W surges. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to motor switching noise. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to shunt inductive kickback from solenoid drivers on shared 24 V supply lines. Use Value: 188 V stand-off allows normal 24 V operation; 328 V clamping prevents damage to 3.3 V ADC front-ends during 1 kV/μs transients. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY power pins and bias rails in outdoor telecom base station line cards from lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on +12 V bias rail feeding PoE controllers and clock buffers. Use Value: 600 W rating handles 10/1000 μs surges per IEC 61000-4-5 Level 4; SMB footprint fits dense board layouts. | Use Scenario: Guarding MCU GPIOs and gate drivers in smart washing machine motor control boards against commutation spikes. IC Role / Device Role / Timing Role: TVS on half-bridge high-side driver supply rail to absorb flyback energy from BLDC motor windings. Use Value: 150 °C TJ max supports sealed enclosure operation; AEC-Q101 qualification ensures longevity in thermally aggressive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ220A-E3/5B | Same VBR (209–231 V), but SMA package (smaller footprint, higher RθJA = 140 °C/W), non-AEC-Q101, RoHS-compliant only | Limited to commercial-temp industrial or consumer use; not qualified for automotive under-hood deployment | Select when board space is constrained and AEC-Q101 is not required; verify thermal margin with 140 °C/W RθJA |
| 1.5SMC220AHE3_A/H | Same VBR and PPPM, but SMC (DO-214AB) package (larger, 7.11 mm × 6.22 mm), AEC-Q101 qualified, 1.5 kW rating | Higher power handling supports longer surge durations; larger footprint requires layout revision | Choose for systems needing >600 W headroom or legacy SMC-compatible designs; not drop-in replacement |
Compared with SM6T220AHM3/H, SMAJ220A-E3/5B offers smaller size but reduced thermal robustness and no automotive qualification, while 1.5SMC220AHE3_A/H provides higher surge capacity in a larger package-neither is pin-compatible, and both require mechanical and thermal revalidation.
Availability
SM6T220AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line card protection, and consumer appliance motor drive circuits requiring stable component supply with AEC-Q101 assurance and halogen-free compliance.
Supply support for SM6T220AHM3/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 TVS devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM6T Series is designed specifically for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and inductive switching surges is mandatory.
FAQ
What is the breakdown voltage tolerance for SM6T220AHM3/H?
The SM6T220AHM3/H has a specified breakdown voltage (VBR) range of 209 V to 231 V at 1.0 mA test current, corresponding to ±5% tolerance around the nominal 220 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for meeting ISO 16750-2 surge immunity requirements in automotive designs.
Is SM6T220AHM3/H suitable for bidirectional transient protection?
No, SM6T220AHM3/H is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the CA-suffixed variant (e.g., SM6T220CAHM3/H). Using SM6T220AHM3/H in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What does the "HM3" suffix indicate in SM6T220AHM3/H?
"HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7″ tape-and-reel packaging (750 units per reel), and "M3" confirms halogen-free molding compound and plating. This distinguishes it from "E3" (RoHS only) and "HE3" (RoHS + AEC-Q101, non-halogen-free) variants, ensuring compliance with automotive environmental and reliability standards.
What is the maximum clamping voltage of SM6T220AHM3/H under standard test conditions?
The SM6T220AHM3/H has a maximum clamping voltage (VC) of 328 V at 2.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Fig. 1 and Fig. 3 of Vishay document 88385 and represents the upper limit of voltage imposed on protected circuitry during a standardized surge event, directly informing system-level overvoltage margin calculations.
How does the thermal performance of SM6T220AHM3/H compare to similar SMB TVS diodes?
SM6T220AHM3/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W on standard 0.2″ × 0.2″ copper pads. This is superior to many competing SMB TVS parts (e.g., SMAJ series at 140 °C/W RθJA), enabling higher sustained power handling and improved reliability in thermally constrained automotive and industrial enclosures.
SM6T220AHM3/H 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):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 2A
- 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 (SMB)
SM6T220AHM3/H FAQ
1.How can I place an order for SM6T220AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T220AHM3/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 SM6T220AHM3/H reliable?
The price and inventory of SM6T220AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T220AHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T220AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T220AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T220AHM3/H?
SM6T220AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T220AHM3/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 SM6T220AHM3/H?
For technical support, including SM6T220AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T220AHM3/H requirements.
6.How does Aetrix verify that SM6T220AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T220AHM3/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 SM6T220AHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T220AHM3/H?
All SM6T220AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T220AHM3/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 SM6T220AHM3/H part is unused and in its original packaging.
Return procedure for SM6T220AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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