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Vishay General Semiconductor - Diodes Division SM6T220CAHM3_A/I
- Part No.:
- SM6T220CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T220CAHM3_A/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
SM6T220CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 220 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and 328 V maximum clamping voltage (VC) at 2.0 A IPPM. It protects sensitive signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T220CAHM3_A/I datasheet, SM6T220CAHM3_A/I pinout, SM6T220CAHM3_A/I application, or SM6T220CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.49), and SMB package thermal resistance (RθJL = 20 °C/W).
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM = 188 V) and robust surge handling up to 100 A IFSM (unidirectional only - not applicable here).
Designed for surface-mount automated placement, it meets MSL Level 1 (260 °C reflow peak) and delivers consistent clamping performance across -65 °C to +150 °C operating junction temperature range, with thermal resistance from junction to lead at 20 °C/W for effective PCB heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 209 V / 231 V at 1.0 mA test current - defines reliable conduction onset under transient stress |
| VWM | 188 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 328 V at 2.0 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W - peak pulse power handling capacity per standard waveform, critical for IEC 61000-4-5 compliance |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are functionally symmetric; both leads serve as interchangeable transient current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | Accepts surge current during positive half-cycle clamping; electrically identical to cathode in bidirectional mode |
| Cathode | Transient current entry (reverse bias) | Accepts surge current during negative half-cycle clamping; electrically identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and floating power domains |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Halogen-free & RoHS-compliant | Meets automotive ELV and industrial environmental directives; HM3 suffix confirms halogen-free molding compound |
| Low clamping ratio (VC/VBR) | 1.49 - minimizes overvoltage exposure to protected ICs while maintaining margin above VWM |
| MSL Level 1 rating | Supports standard Pb-free reflow profiles up to 260 °C peak without moisture-induced damage |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient energy before it reaches the ADC input stage of the microcontroller. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs during 12 V system transients up to ±100 V. | Use Scenario: Shielding 24 V DC digital input modules from inductive kickback when controlling solenoid valves. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed directly at connector entry point to shunt surge current away from optocoupler inputs. Use Value: Maintains functional safety integrity by limiting transient voltage to <328 V, well below optocoupler isolation barrier rating. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceivers on building automation networks subject to lightning-induced surges. IC Role / Device Role / Timing Role: Symmetrical clamping element across differential pair (A/B lines), referenced to common-mode ground. Use Value: Preserves signal integrity by clamping common-mode transients without distorting differential swing (VBR = 220 V > typical 12 V bus swing). | Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in smart washing machines. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive energy during PWM commutation. Use Value: Extends MOSFET driver lifetime by limiting drain-source voltage overshoot to ≤328 V during turn-off events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ220CA | Same VBR (209–231 V), lower PPPM = 400 W, SMA package (larger RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump per ISO 7637-2 Pulse 5a | Select SM6T220CAHM3_A/I when 600 W surge margin and AEC-Q101 qualification are required. |
| 1.5KE220CA | Higher PPPM = 1500 W, axial DO-201 package, non-SMD, no AEC-Q101 | Requires through-hole assembly; incompatible with automated SMT lines and space-constrained PCBs | Choose SM6T220CAHM3_A/I for surface-mount compatibility, automotive qualification, and board-level integration. |
Compared with SMAJ220CA and 1.5KE220CA, SM6T220CAHM3_A/I uniquely combines 600 W surge rating, SMB SMD footprint, AEC-Q101 qualification, and halogen-free construction-making it optimal for high-reliability automotive and industrial PCB designs where layout density and supply chain compliance matter.
Availability
SM6T220CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, telecom line interfaces, and consumer appliance motor control circuits requiring stable component supply and long-term lifecycle support.
Supply support for SM6T220CAHM3_A/I 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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where high surge immunity, compact packaging, and qualification to AEC-Q101 are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in SM6T220CAHM3_A/I?
The "CA" suffix in SM6T220CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SM6T220A), this version has no cathode marking and functions identically regardless of voltage polarity applied across its terminals-ideal for protecting AC signals, differential buses, or floating grounds.
Is SM6T220CAHM3_A/I qualified for automotive use?
Yes, SM6T220CAHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay's official documentation. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for under-hood and cabin-mounted automotive electronics such as body control modules and sensor interfaces.
What is the maximum clamping voltage of SM6T220CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of SM6T220CAHM3_A/I is 328 V when subjected to a 10/1000 μs waveform at IPPM = 2.0 A. This value is measured per JEDEC standards and represents the peak voltage seen by downstream circuitry during worst-case transient events-critical for ensuring protected ICs remain within absolute maximum ratings.
How does the SMB package of SM6T220CAHM3_A/I compare thermally to larger packages?
The SMB (DO-214AA) package of SM6T220CAHM3_A/I offers RθJL = 20 °C/W (junction-to-lead), enabling efficient heat transfer to PCB copper pads. While its RθJA = 100 °C/W is higher than TO-220 or D2PAK packages, proper pad layout (0.2" × 0.2" copper per terminal) ensures adequate thermal performance for 600 W pulse handling in short-duration transients.
Does SM6T220CAHM3_A/I require polarity-aware PCB layout?
No, SM6T220CAHM3_A/I does not require polarity-aware layout because it is a bidirectional TVS diode. The device has no cathode band or polarity marking, and both terminals are functionally identical. PCB footprints can be placed without orientation constraints-simplifying layout, reducing assembly errors, and supporting automated optical inspection (AOI) without polarity verification steps.
SM6T220CAHM3_A/I 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SM6T220CAHM3_A/I FAQ
1.How can I place an order for SM6T220CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T220CAHM3_A/I 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 SM6T220CAHM3_A/I reliable?
The price and inventory of SM6T220CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T220CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T220CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T220CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T220CAHM3_A/I?
SM6T220CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T220CAHM3_A/I 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 SM6T220CAHM3_A/I?
For technical support, including SM6T220CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T220CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T220CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T220CAHM3_A/I 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 SM6T220CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T220CAHM3_A/I?
All SM6T220CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T220CAHM3_A/I, 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 SM6T220CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T220CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T220CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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