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Vishay General Semiconductor - Diodes Division SM15T220CA-M3/9AT
- Part No.:
- SM15T220CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T220CA-M3/9AT.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
SM15T220CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) 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. It protects I/O lines and power rails in automotive sensor units and industrial motor drives against lightning-induced and switching transients.
For engineers reviewing the SM15T220CA-M3/9AT datasheet, SM15T220CA-M3/9AT pinout, SM15T220CA-M3/9AT application, or SM15T220CA-M3/9AT equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 75 °C/W), polarity behavior, AEC-Q101 qualification status, and real-world clamping performance under standardized surge waveforms.
Technical Context
The SM15T220CA-M3/9AT is a bidirectional TVS diode designed to clamp transient overvoltages symmetrically across both polarities without requiring external biasing. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 188 V).
It operates within -65 °C to +150 °C junction temperature range and features low inductance due to its SMC package geometry and internal leadframe design, enabling effective suppression of fast-rising transients (e.g., 8/20 μs and 10/1000 μs waveforms). Thermal resistance from junction to ambient is 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy surges common in lightning and inductive load switching without failure. |
| Stand-off Voltage (VWM) | 188 V - defines maximum continuous reverse operating voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 209–231 V at 1 mA - precise threshold where avalanche conduction initiates under controlled test conditions. |
| Clamping Voltage (VC) | 328 V at 4.6 A IPPM - maximum voltage seen by protected circuit during worst-case 10/1000 μs surge. |
| Junction-to-Ambient RθJA | 75 °C/W - determines thermal rise under DC power dissipation; requires adequate PCB copper area for safe operation. |
| Operating Temperature Range | -65 °C to +150 °C - supports deployment in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly. |
Pinout & Package
SM15T220CA-M3/9AT uses the SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal accepts positive or negative transients; clamping occurs identically in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs like microcontrollers or CAN transceivers during transient events. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising reliability. |
| AEC-Q101 qualified option available | Base P/N HM3 variant supports automotive-grade qualification; SM15T220CA-M3/9AT is commercial grade but shares identical die and package. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; no baking required prior to assembly - reduces manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal lines or supply inputs to limit transient excursions. Use Value: Prevents latch-up or permanent damage to 5 V/12 V sensor interface ICs during ISO 7637-2 Pulse 1/2a/5a events. |
Use Scenario: Safeguarding PLC analog input channels connected to 24 V field devices subject to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting surge energy away from precision op-amps and ADC front-ends. Use Value: Maintains signal integrity below 328 V clamping level while surviving repeated 1500 W pulses per IEC 61000-4-4. |
| Telecom Power Line Protection | Consumer Appliance Control Board |
Use Scenario: Shielding AC-DC converter secondary-side outputs and Ethernet PHY power rails from induced surges on long cable runs. IC Role / Device Role / Timing Role: High-energy transient suppressor placed between isolated DC output and ground reference plane. Use Value: Absorbs up to 1500 W without degradation, ensuring uninterrupted operation during telecom central office lightning events. |
Use Scenario: Securing microcontroller reset lines and button inputs in washing machine control boards subjected to user ESD and pump motor commutation noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) bidirectional clamp preventing false resets or spurious interrupts. Use Value: Delivers reliable immunity to ±8 kV contact ESD (IEC 61000-4-2) while maintaining system uptime and certification compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ220CA-T3 | Lower peak pulse power (600 W), same VWM (188 V), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Suitable for space-constrained consumer designs with lower threat severity; not recommended for industrial lightning protection. | Select SMBJ220CA-T3 only if board area is critical and surge energy remains below 600 W. |
| 1.5KE220CA | Through-hole DO-201 package, identical 1500 W rating and 328 V VC, but larger size and manual assembly requirement | Used in legacy industrial power supplies where SMT is not feasible or where higher mechanical robustness is needed. | Choose 1.5KE220CA for through-hole compatibility or where thermal mass from axial leads improves transient handling in non-SMT assemblies. |
Compared with SMBJ220CA-T3 and 1.5KE220CA, the SM15T220CA-M3/9AT offers optimal balance of high-power SMT capability, halogen-free compliance, and commercial-grade reliability - making it ideal for volume automotive and industrial PCBs requiring automated placement and consistent surge margin.
Availability
SM15T220CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial motor drive I/O protection, and telecom power line safeguarding requiring stable component supply and full traceability.
Supply support for SM15T220CA-M3/9AT 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 and application-specific performance.
The SM15T Series was developed to deliver high-power transient suppression in compact SMT packages for automotive, industrial, and telecom systems where space, thermal performance, and surge immunity are jointly constrained.
FAQ
What is the clamping voltage of SM15T220CA-M3/9AT at its rated peak pulse current?
The SM15T220CA-M3/9AT has a maximum clamping voltage (VC) of 328 V when subjected to a 10/1000 μs waveform at 4.6 A peak pulse current (IPPM). This value is measured under standardized test conditions with 0.31" × 0.31" copper pads and reflects the upper voltage limit imposed on protected circuits during surge events. The SM15T220CA-M3/9AT maintains this clamping performance consistently across its operating temperature range.
Is SM15T220CA-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SM15T220CA-M3/9AT itself carries the M3 suffix, indicating halogen-free and RoHS-compliant commercial-grade construction. While it shares the same die and SMC package as the AEC-Q101 qualified HM3 variant (e.g., SM15T220CAHM3_A/I), the SM15T220CA-M3/9AT is not individually certified to AEC-Q101. For automotive use, specify the HM3-suffixed version to ensure formal qualification compliance.
How does the bidirectional configuration of SM15T220CA-M3/9AT affect its layout and usage?
The SM15T220CA-M3/9AT has no polarity marking and functions identically in both directions - eliminating orientation concerns during PCB layout and pick-and-place. Engineers place it across any two nodes needing symmetrical overvoltage protection, such as differential signal pairs or ungrounded power rails. Its bidirectional nature avoids the need for dual unidirectional devices or external bias networks, simplifying design and reducing bill-of-materials count.
What is the thermal resistance of SM15T220CA-M3/9AT, and how does it impact PCB design?
The SM15T220CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, designers must allocate sufficient copper area and consider airflow or heatsinking. Exceeding TJ(max) = 150 °C risks parametric shift or premature failure, especially during repetitive surge events.
Can SM15T220CA-M3/9AT replace older through-hole TVS diodes like 1.5KE220CA in new designs?
Yes, the SM15T220CA-M3/9AT provides equivalent electrical performance (same VWM, VBR, VC, and PPPM) as the through-hole 1.5KE220CA but in an SMC surface-mount package. Migration requires updating land patterns and reflow profiles, yet yields benefits in assembly automation, board density, and vibration resistance. The SM15T220CA-M3/9AT retains full surge capability without sacrificing reliability - making it a direct functional upgrade path.
SM15T220CA-M3/9AT 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T220CA-M3/9AT FAQ
1.How can I place an order for SM15T220CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T220CA-M3/9AT 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 SM15T220CA-M3/9AT reliable?
The price and inventory of SM15T220CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T220CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T220CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T220CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T220CA-M3/9AT?
SM15T220CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T220CA-M3/9AT 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 SM15T220CA-M3/9AT?
For technical support, including SM15T220CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T220CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T220CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T220CA-M3/9AT 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 SM15T220CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T220CA-M3/9AT?
All SM15T220CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T220CA-M3/9AT, 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 SM15T220CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T220CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T220CA-M3/9AT Tags
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