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Vishay General Semiconductor - Diodes Division SM15T22CAHM3/I
- Part No.:
- SM15T22CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22CAHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,751
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Product details
Overview
SM15T22CAHM3/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), 22 V standoff voltage (VWM), 30.6 V max clamping voltage at 49.0 A IPPM, and AEC-Q101 qualified for automotive applications including engine control units and infotainment power rails.
For engineers reviewing the SM15T22CAHM3/I datasheet, SM15T22CAHM3/I pinout, SM15T22CAHM3/I application, or SM15T22CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, 150 °C junction temperature rating, halogen-free RoHS compliance, and compatibility with high-energy lightning-induced transients on 12 V/24 V automotive supply lines.
Technical Context
The SM15T22CAHM3/I operates as a symmetrical avalanche diode, conducting in both directions when reverse voltage exceeds its breakdown threshold of 24.7–27.3 V (VBR min/max at 1 mA). Its low-inductance SMC package enables fast response to sub-microsecond transients while maintaining stable clamping under repetitive surge conditions up to 6.5 W steady-state dissipation.
Designed for system-level ESD and surge protection per IEC 61000-4-2 (±30 kV contact) and IEC 61000-4-5 (4 kV line-to-line), it features glass-passivated junctions, MSL Level 1 moisture sensitivity, and solderability compliant with J-STD-002 and JESD 22-B102 - critical for reflow-compatible automotive PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC bias window for 24 V nominal systems. |
| VBR (min/max) | 24.7 V / 27.3 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 30.6 V at 49.0 A (10/1000 μs) - clamping voltage during worst-case surge; limits downstream IC stress to ≤31 V. |
| PPPM | 1500 W - peak pulse power handling per standard waveform; supports IEC 61000-4-5 Level 4 immunity testing. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
SM15T22CAHM3/I uses a 2-terminal SMC (DO-214AB) package with no polarity marking - consistent with bidirectional TVS construction. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, mounted on 8.0 mm × 8.0 mm copper pads per thermal derating requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One side of symmetrical junction; conducts during positive transients relative to cathode reference. |
| Cathode | Transient current entry (reverse bias) | Other side of symmetrical junction; conducts during negative transients - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan. |
| Halogen-free & RoHS-compliant | Meets automotive material compliance standards (e.g., GMW3172, Ford WSS-M99P9999-A1) and EU RoHS Directive 2011/65/EU. |
| Low clamping ratio (VC/VBR ≈ 1.19) | Minimizes overvoltage overshoot during surge events - critical for protecting 3.3 V/5 V logic interfaces downstream. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 16750-2) and alternator switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power entry point to clamp surges before DC/DC converters and microcontrollers. Use Value: Withstands 1500 W pulses and maintains clamping below 31 V - preventing latch-up or gate oxide damage in downstream SiC MOSFET drivers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance TVS across differential signal pairs (e.g., RS-485) to suppress ±2 kV EFT without signal distortion. Use Value: 30.6 V clamping at 49 A ensures sensor front-end op-amps remain within absolute maximum ratings during 5/50 ns burst events. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power supplies and data lines in outdoor telecom cabinets exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V PoE input rails and secondary-level protection on isolated 3.3 V management bus. Use Value: 1500 W rating meets IEC 61000-4-5 4 kV line-to-line requirement; bidirectional symmetry avoids polarity-dependent layout constraints. | Use Scenario: Absorbing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Across motor terminals to quench >100 V spikes generated during PWM commutation. Use Value: Glass-passivated junction ensures stable clamping over 10⁵ surge cycles - extending service life beyond 10 years in high-duty-cycle applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | 600 W PPPM (vs. 1500 W); same VWM/VBR but lower IPPM (27.3 A vs. 49.0 A) | Limited to lower-energy threats (IEC 61000-4-2 only); insufficient for ISO 16750-2 load dump | Select SMAJ22CA only for space-constrained consumer designs where 600 W surge margin is sufficient. |
| SMCJ22CA | Identical 1500 W PPPM and VWM/VBR specs; same SMC package; not AEC-Q101 qualified | Acceptable for industrial/commercial use but lacks automotive qualification documentation and traceability | Choose SMCJ22CA for cost-sensitive non-automotive applications requiring identical electrical performance without AEC-Q101 audit trail. |
Compared with SMAJ22CA and SMCJ22CA, SM15T22CAHM3/I delivers higher surge robustness in the same footprint while providing certified automotive reliability - making it the sole option among the three qualified for safety-critical vehicle subsystems.
Availability
SM15T22CAHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom line cards, and consumer appliance motor drive circuits requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SM15T22CAHM3/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 high-reliability, high-power, and automotive-qualified components.
The SM15T Series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial control I/O, and infrastructure equipment where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "HM3" suffix indicate in SM15T22CAHM3/I?
The "HM3" suffix in SM15T22CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates automotive grade, "M3" specifies halogen-free materials, and "/I" refers to 13-inch tape-and-reel packaging (3500 units per reel), fully compliant with JESD201 Class 2 whisker resistance testing.
Is SM15T22CAHM3/I suitable for protecting CAN bus lines?
SM15T22CAHM3/I is not optimized for CAN bus protection due to its 22 V VWM - too high for 5 V CAN transceivers. It is intended for 24 V power rail protection. For CAN FD or classical CAN, lower-voltage TVS devices such as SMAJ5.0CA (5 V VWM) are recommended to avoid interfering with bus signaling thresholds.
How does SM15T22CAHM3/I perform under repeated surge stress?
SM15T22CAHM3/I maintains stable clamping voltage and leakage current after ≥1000 repetitive 10/1000 μs surges at 80 % of rated IPPM, verified per AEC-Q101 stress tests. Its glass-passivated junction prevents parameter drift, ensuring consistent protection performance across automotive lifetime requirements.
What is the thermal resistance of SM15T22CAHM3/I, and how does it affect PCB layout?
SM15T22CAHM3/I has RθJA = 75 °C/W (typical) and RθJL = 15 °C/W. To sustain 6.5 W continuous dissipation, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal - smaller pads cause excessive junction temperature rise and premature thermal shutdown during sustained overvoltage events.
Does SM15T22CAHM3/I require external series impedance for optimal protection?
Yes - SM15T22CAHM3/I should be used with a series current-limiting resistor or ferrite bead upstream to reduce peak current into the device during fast transients. This extends its effective lifetime and prevents localized heating that could degrade clamping consistency, especially in high-repetition-rate EFT environments.
SM15T22CAHM3/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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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)
SM15T22CAHM3/I FAQ
1.How can I place an order for SM15T22CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22CAHM3/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 SM15T22CAHM3/I reliable?
The price and inventory of SM15T22CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T22CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22CAHM3/I?
SM15T22CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22CAHM3/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 SM15T22CAHM3/I?
For technical support, including SM15T22CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22CAHM3/I requirements.
6.How does Aetrix verify that SM15T22CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T22CAHM3/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 SM15T22CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T22CAHM3/I?
All SM15T22CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22CAHM3/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 SM15T22CAHM3/I part is unused and in its original packaging.
Return procedure for SM15T22CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22CAHM3/I Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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