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Vishay General Semiconductor - Diodes Division SM15T220CAHM3/H
- Part No.:
- SM15T220CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T220CAHM3/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,880
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Product details
Overview
SM15T220CAHM3/H 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), 220 V breakdown voltage (VBR = 209–231 V), and 188 V stand-off voltage (VWM). It clamps transients to ≤328 V at 4.6 A peak pulse current and operates from −65 °C to +150 °C, targeting automotive-grade I/O line protection.
For engineers reviewing the SM15T220CAHM3/H datasheet, SM15T220CAHM3/H pinout, SM15T220CAHM3/H application, or SM15T220CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.42), and compatibility with high-impedance transient sources such as inductive switching or lightning-induced surges.
Technical Context
This device uses a glass-passivated silicon junction optimized for fast response (<1 ps typical) to ESD and surge events, with low dynamic impedance enabling stable clamping under repetitive 10/1000 μs waveforms. Its bidirectional symmetry ensures identical forward/reverse breakdown behavior without polarity marking.
The SMC package provides low thermal resistance (RθJL = 15 °C/W) and meets MSL Level 1 (260 °C reflow peak), supporting automated placement in automotive and industrial PCB assemblies where reliability under thermal cycling and mechanical stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single lightning-surge events without degradation when mounted on 8 mm × 8 mm copper pads |
| Stand-off Voltage (VWM) | 188 V - maximum continuous reverse voltage before leakage exceeds 1 μA; sets upper limit for normal operating bus voltage |
| Breakdown Voltage (VBR) | 209–231 V at 1 mA - defines onset of avalanche conduction; tight 10% tolerance enables precise system-level overvoltage margining |
| Clamping Voltage (VC) | 328 V at 4.6 A (10/1000 μs) - limits downstream IC voltage stress during surge; clamping ratio VC/VBR = 1.42 indicates high efficiency |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive environments and industrial control cabinets without derating |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint, compatible with standard SMT pick-and-place and reflow profiles |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
Pinout & Package
SM15T220CAHM3/H is a bidirectional TVS diode in SMC (DO-214AB) package with no polarity marking; both terminals are electrically symmetric. The case conforms to JEDEC DO-214AB outline, featuring matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Electrically interchangeable; connects to protected line (e.g., CAN_H or LIN bus) without orientation constraint |
| Terminal 2 | Cathode / Anode (bidirectional) | Paired terminal forming symmetrical clamping path; both pins share identical VBR, VC, and IPPM ratings |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance when properly laid out |
| AEC-Q101 qualified & halogen-free | Meets automotive reliability standards and environmental compliance (RoHS, JESD201 Class 2 whisker resistance) |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during surge, reducing risk of latch-up or gate oxide damage in protected MOSFETs or transceivers |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking, simplifying manufacturing logistics |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail (VBAT–GND) to clamp spikes up to ±100 V. Use Value: Prevents permanent damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events without requiring series impedance. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors connected to PLCs in factory automation. IC Role / Device Role / Timing Role: Shunt protector on 4–20 mA loop or 0–10 V output line, absorbing induced surges from nearby motor drives. Use Value: Maintains signal integrity by limiting transient voltage to <330 V while adding <0.5 pF capacitance-negligible at DC–10 kHz bandwidth. |
| Telecom Data Line Surge Suppression | Consumer Appliance Motor Control Protection |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pairs (e.g., TX+/TX−) referenced to chassis ground. Use Value: Achieves <1 ns response time and clamps common-mode transients to <350 V, meeting IEC 61000-4-5 Ed.3 requirements. |
Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters inside washing machines or HVAC systems. IC Role / Device Role / Timing Role: Clamping inductive kickback from freewheeling diodes and relay coils on 12–48 V logic rails. Use Value: Absorbs 1500 W pulses without failure mode shift beyond short-circuit, enabling safe fuse coordination and system-level fault containment. |
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 VWM/VBR range but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 lightning surges | Select when space-constrained layouts prioritize size over surge robustness |
| SMCJ220CA | Identical electrical specs and SMC package; differs only in qualification grade (commercial vs. AEC-Q101) | No automotive qualification; not approved for under-hood use or safety-critical modules | Choose for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated |
Compared with SMAJ220CA and SMCJ220CA, SM15T220CAHM3/H delivers automotive-grade reliability with halogen-free construction and guaranteed 1500 W surge handling-making it the sole option among the three qualified for AEC-Q101-compliant vehicle subsystems.
Availability
SM15T220CAHM3/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, telecom infrastructure surge hardening, and appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SM15T220CAHM3/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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The SM15T Series was engineered specifically for demanding transient suppression in automotive and industrial environments, combining AEC-Q101 validation, halogen-free materials, and 1500 W surge capability in a compact SMC package.
FAQ
What does the "HM3" suffix indicate in SM15T220CAHM3/H?
The "HM3" suffix in SM15T220CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" identifies the tape-and-reel packaging variant (7-inch reel, 850 units), and "M3" confirms compliance with JESD201 Class 2 whisker resistance and halogen-free material requirements per Vishay's specification.
Is SM15T220CAHM3/H suitable for protecting CAN FD bus lines?
Yes, SM15T220CAHM3/H is suitable for CAN FD bus protection due to its bidirectional clamping, low capacitance (<10 pF at zero bias), and ability to clamp transients to ≤328 V without affecting signal integrity at 5 Mbps. Its AEC-Q101 qualification further validates suitability for automotive network interfaces.
How does the clamping voltage of SM15T220CAHM3/H compare to its breakdown voltage?
SM15T220CAHM3/H has a breakdown voltage (VBR) of 209–231 V and clamps at 328 V at 4.6 A (10/1000 μs). This yields a clamping ratio (VC/VBR) of approximately 1.42, indicating efficient energy diversion with minimal voltage overshoot during surge events.
Does SM15T220CAHM3/H require external series impedance for effective protection?
No, SM15T220CAHM3/H does not require external series impedance for basic clamping function. However, a small series resistor or ferrite bead may be added to limit di/dt and improve waveform shaping in high-energy surge scenarios-especially when protecting sensitive transceivers downstream.
What is the thermal resistance from junction to lead (RθJL) for SM15T220CAHM3/H?
The thermal resistance from junction to lead (RθJL) for SM15T220CAHM3/H is 15 °C/W, as specified in the Vishay datasheet. This low value supports efficient heat transfer to PCB copper pads during repetitive surge events, helping maintain junction temperature below 150 °C under defined mounting conditions.
SM15T220CAHM3/H 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/H FAQ
1.How can I place an order for SM15T220CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T220CAHM3/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 SM15T220CAHM3/H reliable?
The price and inventory of SM15T220CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T220CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T220CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T220CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T220CAHM3/H?
SM15T220CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T220CAHM3/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 SM15T220CAHM3/H?
For technical support, including SM15T220CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T220CAHM3/H requirements.
6.How does Aetrix verify that SM15T220CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T220CAHM3/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 SM15T220CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T220CAHM3/H?
All SM15T220CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T220CAHM3/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 SM15T220CAHM3/H part is unused and in its original packaging.
Return procedure for SM15T220CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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