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Vishay General Semiconductor - Diodes Division SM15T22AHM3_A/I
- Part No.:
- SM15T22AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHM3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,787
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Product details
Overview
SM15T22AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.6 V clamping voltage at 49.0 A peak pulse current, and 18.8 V stand-off voltage. 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_A/I datasheet, SM15T22AHM3_A/I pinout, SM15T22AHM3_A/I application, or SM15T22AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance under standardized waveforms, and halogen-free RoHS-compliant sourcing details.
Technical Context
The SM15T22AHM3_A/I uses a glass-passivated silicon junction to achieve low clamping ratio (VC/VBR ≈ 1.31) and low dynamic impedance. Its unidirectional polarity features a cathode band marking and supports surge currents up to 200 A (10 ms half-sine) with a maximum junction temperature of +150 °C.
Designed for high-source-impedance transient environments, it operates within -65 °C to +150 °C junction range and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.8 V - Maximum reverse stand-off voltage before leakage exceeds 1 μA; defines safe operating window for continuous bias. |
| VBR @ IT = 1 mA | 20.9–23.1 V - Breakdown voltage range at 1 mA test current; ensures predictable turn-on threshold under transient stress. |
| VC @ IPPM = 49.0 A | 30.6 V - Clamping voltage under 10/1000 μs waveform; limits downstream voltage stress during surge events. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against lightning surges per IEC 61000-4-5. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; guides PCB thermal layout. |
| TJmax | +150 °C - Maximum allowable junction temperature; sets upper limit for ambient + power dissipation design margin. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, halogen-free, RoHS-compliant, MSL Level 1 (260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in reverse-biased protection configuration | Connected to protected line; clamps when voltage exceeds VWM, diverting surge current to ground. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes transient current path during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 lightning surges without derating on standard PCB pads. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on downstream ICs during transient events, preserving signal integrity and latch-up margin. |
| AEC-Q101 qualification (HM3 suffix) | Validates reliability for automotive under-hood and infotainment applications requiring extended temperature cycling and humidity testing. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance mandates and eliminates corrosive decomposition products during reflow or field failure. |
| Low inductance SMC package | Reduces parasitic voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping response fidelity. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 24 V supply rails feeding ECUs and body control modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp positive-going transients. Use Value: Withstands 200 A surge (10 ms) and maintains VC ≤ 30.6 V, preventing regulator overvoltage shutdown and ensuring ECU uptime. |
Use Scenario: Safeguarding PLC digital I/O terminals connected to solenoid valves and contactors subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each I/O line to absorb 10/1000 μs switching transients before they reach isolation barriers. Use Value: 1500 W rating handles repetitive coil energy discharge; 75 °C/W RθJA allows thermal stability on compact industrial PCBs. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: Shielding CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on signal line, grounded via shortest possible trace to minimize loop inductance. Use Value: Clamps sub-100 ns ESD pulses to <30.6 V while adding negligible signal distortion due to SMC package's low parasitic inductance. |
Use Scenario: Front-end protection for PoE-powered devices (e.g., IP cameras, access points) exposed to induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary TVS on DC input side of PoE PD controller, coordinated with secondary GDT or MOV stages. Use Value: Halogen-free HM3 construction meets telecom flame-retardancy standards (UL 94 V-0); AEC-Q101 grade adds long-term field reliability assurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Lower PPPM (400 W), same VWM/VBR, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer electronics but insufficient for automotive-level lightning threats. | Select only for cost-sensitive, non-automotive designs with lower surge exposure and tighter board area budgets. |
| SMCJ22A-M3/57T | Same SMC package and 1500 W rating, but commercial-grade (non-AEC-Q101), halogen-free RoHS only (no automotive qualification) | Lacks AEC-Q101 validation; acceptable for industrial controls but not for safety-critical automotive subsystems. | Choose when automotive qualification is unnecessary and full halogen-free compliance is required without AEC-Q101 overhead. |
Compared with SMAJ22A-E3/57T and SMCJ22A-M3/57T, SM15T22AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 1500 W surge capacity in the SMC package-making it the only option qualified for under-hood automotive power rail protection where both reliability and regulatory compliance are mandatory.
Availability
SM15T22AHM3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and certified environmental compliance.
Supply support for SM15T22AHM3_A/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 reliability, efficiency, and application-specific optimization.
The SM15T Series was developed to deliver high-power transient suppression in automotive-qualified surface-mount packages, targeting harsh-environment applications where robustness, thermal stability, and regulatory compliance are critical.
FAQ
What is the clamping voltage of SM15T22AHM3_A/I at its rated peak pulse current?
The SM15T22AHM3_A/I has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 49.0 A. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T22AHM3_A/I maintains this clamping performance across its qualified operating temperature range.
Is SM15T22AHM3_A/I qualified for automotive applications?
Yes, SM15T22AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM15T Series datasheet (Rev. 09-Jan-2024, Doc. #88380). This qualification covers temperature cycling, humidity testing, and mechanical shock validation required for automotive under-hood and chassis-mounted electronics. The SM15T22AHM3_A/I is explicitly designated for automotive use in the ordering information table.
What does the "HM3" suffix indicate in SM15T22AHM3_A/I?
The "HM3" suffix in SM15T22AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering guide, HM3 parts meet JESD201 Class 2 whisker resistance, UL 94 V-0 flammability, and automotive reliability standards-distinguishing them from commercial-grade M3 (halogen-free, no AEC-Q101) and E3 (RoHS, no halogen-free or AEC-Q101) variants. The SM15T22AHM3_A/I carries this full specification set.
What is the thermal resistance of SM15T22AHM3_A/I, and how is it measured?
The SM15T22AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per JEDEC standards. This value assumes still air convection and guides minimum pad area and copper pour requirements for thermal management. RθJA directly impacts steady-state power dissipation limits and must be considered alongside its 6.5 W steady-state power rating.
How does SM15T22AHM3_A/I differ from SM15T22AHE3_A/I?
The SM15T22AHM3_A/I differs from SM15T22AHE3_A/I in halogen content and qualification: HM3 is halogen-free and AEC-Q101 qualified, while HE3 is RoHS-compliant but contains halogens and lacks AEC-Q101 validation. Both share identical electrical specs (VWM = 18.8 V, VC = 30.6 V, PPPM = 1500 W) and SMC packaging, but only SM15T22AHM3_A/I meets automotive environmental and reliability mandates. The SM15T22AHM3_A/I is the preferred choice for Tier 1 automotive suppliers.
SM15T22AHM3_A/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:
- Active
- 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_A/I FAQ
1.How can I place an order for SM15T22AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHM3_A/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_A/I reliable?
The price and inventory of SM15T22AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SM15T22AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHM3_A/I?
SM15T22AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHM3_A/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_A/I?
For technical support, including SM15T22AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHM3_A/I requirements.
6.How does Aetrix verify that SM15T22AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T22AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SM15T22AHM3_A/I?
All SM15T22AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SM15T22AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22AHM3_A/I Tags
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