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Vishay General Semiconductor - Diodes Division SM15T220CAHM3/I
- Part No.:
- SM15T220CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T220CAHM3/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,842
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Product details
Overview
SM15T220CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 328 V maximum clamping voltage at 4.6 A IPPM, and 188 V stand-off voltage - used to protect automotive sensor signal lines, industrial I/O ports, and power supply rails against lightning-induced and switching transients.
For engineers reviewing the SM15T220CAHM3/I datasheet, SM15T220CAHM3/I pinout, SM15T220CAHM3/I application, or SM15T220CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low-inductance SMC package, and verified 1500 W surge handling per IEC 61000-4-5.
Technical Context
The SM15T220CAHM3/I operates as a voltage-clamped crowbar device during overvoltage events, with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable VBR (209–231 V) and low leakage (<1 μA at 188 V).
Thermal design relies on RθJL = 15 °C/W to leads and RθJA = 75 °C/W to ambient, requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating. It fails short-circuit under overstress, meeting automotive-grade reliability per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains lightning-surge energy without degradation when mounted on 8.0 mm × 8.0 mm Cu pads |
| Stand-off Voltage (VWM) | 188 V - maximum continuous reverse voltage before leakage exceeds 1 μA |
| Breakdown Voltage (VBR) | 209–231 V at 1 mA - defines onset of avalanche conduction in either polarity |
| Clamping Voltage (VC) | 328 V at 4.6 A IPPM - limits transient voltage seen by protected ICs or MOSFETs |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - surface-mount, low-inductance, MSL Level 1, 260 °C reflow compatible |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
SM15T220CAHM3/I uses the standard SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, no polarity marking (bidirectional), and 0.305" × 0.220" footprint. Mounting requires symmetric 8.0 mm × 8.0 mm copper pads per terminal for thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (unmarked) | Bidirectional terminals | No polarity designation - identical electrical behavior in forward and reverse bias; connects across protected line and ground or differential pair |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without derating on proper PCB layout |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during fast transients, reducing stress on downstream 200 V-rated components |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, responding within nanoseconds to transients exceeding 188 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs by limiting excursion to ≤328 V during 4.6 A surge events. |
Use Scenario: Safeguarding PLC digital input cards and RS-485 transceivers connected to field wiring exposed to motor switching and lightning coupling. IC Role / Device Role / Timing Role: Standoff protector across differential pairs or single-ended inputs, conducting only during >188 V excursions with <100 ns response. Use Value: Maintains system uptime by absorbing 1500 W surges without failure, eliminating need for external spark gaps or varistors. |
| Power Supply Rail Clamping | Telecom Line Interface Protection |
Use Scenario: Secondary overvoltage protection on 24 V DC power distribution rails feeding industrial controllers and actuators. IC Role / Device Role / Timing Role: Crowbar element shunting surge current to ground when rail voltage exceeds 188 V, coordinated with upstream fuses. Use Value: Limits rail excursion to 328 V during 10/1000 μs transients, preserving 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers subjected to induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Symmetrical clamp across twisted-pair lines, suppressing common-mode and differential-mode transients simultaneously. Use Value: Enables compliance with GR-1089-CORE telecom surge immunity standards without adding series impedance or signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ220CA | Same 220 V VBR range, but rated 400 W (SMA package); lower IPPM (2.2 A) and higher VC (356 V) | Not suitable for 1500 W IEC 61000-4-5 Level 4; limited to lower-energy threats | Select only if board space constraints prohibit SMC and surge threat level is ≤1 kV |
| ON Semiconductor 1.5KE220CA | Through-hole DO-201 package; same 220 V VBR, 1500 W rating, but higher RθJA (100 °C/W) and no AEC-Q101 | Requires through-hole assembly; not qualified for automotive use; less reliable in high-vibration environments | Prefer for legacy through-hole designs where rework tolerance outweighs automotive qualification needs |
Compared with SMAJ220CA and 1.5KE220CA, the SM15T220CAHM3/I delivers superior surge robustness in surface-mount form, AEC-Q101 validation for automotive deployment, and lower thermal resistance - enabling reliable operation in compact, high-density, and mission-critical layouts.
Availability
SM15T220CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line drivers requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for SM15T220CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SM15T220CAHM3/I?
The HM3 suffix in SM15T220CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards including high-temperature operating life, temperature cycling, and electrostatic discharge testing - critical for under-hood and ADAS applications.
Is SM15T220CAHM3/I unidirectional or bidirectional?
SM15T220CAHM3/I is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, making it ideal for protecting AC-coupled lines, differential buses like CAN or RS-485, and any circuit where voltage reversals may occur during transients.
What is the maximum clamping voltage of SM15T220CAHM3/I at rated peak pulse current?
The maximum clamping voltage (VC) of SM15T220CAHM3/I is 328 V at 4.6 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions using 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SM15T220CAHM3/I require a heatsink for 1500 W operation?
No external heatsink is required for SM15T220CAHM3/I to handle 1500 W pulses, provided it is mounted on the specified minimum 8.0 mm × 8.0 mm copper pads per terminal. Its RθJL of 15 °C/W enables sufficient heat dissipation during short-duration transients without thermal runaway.
How does SM15T220CAHM3/I differ from the non-AEC-Q101 SM15T220CA-E3/I?
SM15T220CAHM3/I adds AEC-Q101 qualification and halogen-free materials versus SM15T220CA-E3/I, which is commercial-grade only. Both share identical electrical specs and SMC packaging, but HM3 is validated for automotive use with extended reliability testing - essential for safety-critical vehicle subsystems.
SM15T220CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 4.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SM15T220CAHM3/I FAQ
1.How can I place an order for SM15T220CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T220CAHM3/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 SM15T220CAHM3/I reliable?
The price and inventory of SM15T220CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T220CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T220CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T220CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T220CAHM3/I?
SM15T220CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T220CAHM3/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 SM15T220CAHM3/I?
For technical support, including SM15T220CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T220CAHM3/I requirements.
6.How does Aetrix verify that SM15T220CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T220CAHM3/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 SM15T220CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T220CAHM3/I?
All SM15T220CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T220CAHM3/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 SM15T220CAHM3/I part is unused and in its original packaging.
Return procedure for SM15T220CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T220CAHM3/I Tags
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