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Vishay General Semiconductor - Diodes Division SM15T22AHM3/I
- Part No.:
- SM15T22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,333
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Product details
Overview
SM15T22AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 22 V standoff voltage (VWM = 18.8 V), 23.1 V minimum breakdown voltage (VBR), 30.6 V maximum clamping voltage at 49.0 A IPPM, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T22AHM3/I datasheet, SM15T22AHM3/I pinout, SM15T22AHM3/I application, or SM15T22AHM3/I equivalent, key selection criteria include clamping performance under 49 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T22AHM3/I uses a glass-passivated silicon junction optimized for low-inductance transient suppression. Its unidirectional polarity features a cathode band marking and operates with reverse-biased clamping action during overvoltage events.
It delivers 1500 W peak pulse power handling with a 10/1000 μs waveform while maintaining a low 30.6 V clamping voltage at 49.0 A peak pulse current. Thermal design relies on RθJL = 15 °C/W junction-to-lead resistance and requires mounting on specified 0.31" × 0.31" copper pads for rated derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18.8 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 20.9–23.1 V at 1.0 mA IT - Confirmed avalanche onset range for reliable triggering |
| VC (Clamping Voltage) | 30.6 V at 49.0 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge |
| PPPM | 1500 W - Surge energy absorption capacity under standardized 10/1000 μs threat waveform |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance defining required PCB copper area for thermal management |
| TJ max. | +150 °C - Maximum allowable junction temperature supporting operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm body and 2.62 mm height |
Pinout & Package
SM15T22AHM3/I is housed in an SMC (DO-214AB) package with two terminals: anode and cathode. The cathode is marked by a visible band on the device body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in TVS configuration | Provides return path for clamped surge current; must be routed with minimal inductance to maintain low VC |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., power rail or signal trace) | Marked with band; reverse-biased during clamping-determines polarity of protection and layout orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements |
| Low clamping ratio (VC/VBR ≈ 1.32) | Ensures tight voltage margin between breakdown and clamping-critical for protecting 24 V logic interfaces |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) when properly mounted on recommended 8.0 mm × 8.0 mm pads |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (<10 ns rise time), preserving clamping integrity |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 24 V supply rails feeding ECUs, body control modules, and lighting drivers against load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients before LDO or DC/DC stage. Use Value: Clamps to 30.6 V at 49 A, preventing overvoltage damage to downstream 36 V-rated regulators and ensuring ISO 7637-2 compliance. |
Use Scenario: Guarding gate driver inputs and feedback signal lines in variable-frequency drives exposed to inductive kickback from 3-phase motors. IC Role / Device Role / Timing Role: Fast-response transient suppressor on isolated analog feedback paths (e.g., current sense amplifiers) and PWM input traces. Use Value: Sub-31 V clamping preserves signal integrity across ±10 V analog ranges and avoids false triggering of protection circuits. |
| Telecom DC Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding -48 V DC telecom power inputs against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on input bulk capacitor node, coordinated with upstream GDT or MOV for staged protection. Use Value: 1500 W rating enables coordination with secondary-stage suppressors while maintaining low let-through voltage to protect rectifier diodes and PMICs. |
Use Scenario: Protecting microcontroller I/O pins and relay coil flyback paths in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Localized clamping on 12 V relay coil returns and UART/USB lines interfacing with external sensors. Use Value: Halogen-free construction meets IEC 62368-1 flammability and environmental compliance for white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Same 22 V VWM, but lower 400 W PPPM rating and higher 35.5 V VC at 32.4 A IPPM | Limited to lower-energy threats (IEC 61000-4-2 ESD only); not suitable for IEC 61000-4-5 Level 4 | Select SMAJ22A-E3/57T only for space-constrained consumer designs where full 1500 W capability is unnecessary |
| SMCJ22A-M3/57T | Identical 22 V VWM and 1500 W PPPM, but non-AEC-Q101 commercial grade and no halogen-free assurance | Acceptable for industrial controls but excluded from automotive BOMs requiring AEC-Q101 and material compliance | Choose SMCJ22A-M3/57T for cost-sensitive non-automotive applications where halogen-free and AEC-Q101 are not mandated |
Compared with SMAJ22A-E3/57T and SMCJ22A-M3/57T, SM15T22AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W surge capability in a single SMC package-making it the only option qualified for Tier-1 automotive power rail protection without derating or secondary components.
Availability
SM15T22AHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom DC power feeds, and consumer appliance control boards requiring stable component supply and long-term lifecycle support.
Supply support for SM15T22AHM3/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 optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation, robust clamping, and halogen-free compliance.
FAQ
What is the clamping voltage of SM15T22AHM3/I at its rated peak pulse current?
The SM15T22AHM3/I has a maximum clamping voltage (VC) of 30.6 V at 49.0 A peak pulse current (IPPM), measured using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T22AHM3/I maintains this clamping performance when mounted per the recommended 8.0 mm × 8.0 mm copper pad layout.
Is SM15T22AHM3/I qualified for automotive applications?
Yes, SM15T22AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's official documentation. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and ESD verification-to meet automotive reliability standards. The "HM3" designation also confirms halogen-free and RoHS-compliant construction required for modern vehicle platforms.
What does the "I" suffix in SM15T22AHM3/I signify?
The "I" suffix in SM15T22AHM3/I denotes packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This delivery mode supports high-volume SMT assembly lines and is compatible with standard pick-and-place equipment. The "HM3" portion confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
How does SM15T22AHM3/I differ from SM15T22A-E3/57T?
SM15T22AHM3/I and SM15T22A-E3/57T share identical electrical specifications (VWM, VBR, VC, PPPM), but differ in qualification and material compliance. SM15T22AHM3/I is AEC-Q101 qualified and halogen-free; SM15T22A-E3/57T is commercial-grade and RoHS-compliant but not halogen-free or automotive-qualified. Both use the same SMC package and 7" tape-and-reel delivery (57T), whereas HM3/I uses 13".
What is the thermal resistance specification for SM15T22AHM3/I?
The SM15T22AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values define PCB layout requirements for sustained power dissipation and transient thermal management-especially critical in enclosed automotive or industrial enclosures.
SM15T22AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T22AHM3/I FAQ
1.How can I place an order for SM15T22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHM3/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 SM15T22AHM3/I reliable?
The price and inventory of SM15T22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22AHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHM3/I?
SM15T22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHM3/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 SM15T22AHM3/I?
For technical support, including SM15T22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHM3/I requirements.
6.How does Aetrix verify that SM15T22AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T22AHM3/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 SM15T22AHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T22AHM3/I?
All SM15T22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHM3/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 SM15T22AHM3/I part is unused and in its original packaging.
Return procedure for SM15T22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22AHM3/I Tags
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