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Vishay General Semiconductor - Diodes Division SM15T22AHE3_A/H
- Part No.:
- SM15T22AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHE3_A/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,180
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Product details
Overview
SM15T22AHE3_A/H from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 22 V breakdown voltage (VBR = 20.9–23.1 V), 18.8 V stand-off voltage (VWM), and 30.6 V clamping voltage (VC) at 49 A peak pulse current - used to protect MOSFETs, sensor signal lines, and I/O interfaces in automotive and industrial power electronics.
For engineers reviewing the SM15T22AHE3_A/H datasheet, SM15T22AHE3_A/H pinout, SM15T22AHE3_A/H application, or SM15T22AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and unidirectional polarity marking for correct PCB orientation.
Technical Context
This device operates as a silicon avalanche diode designed for fast-response overvoltage clamping. It delivers 1500 W peak pulse power (10/1000 μs), exhibits low clamping ratio (VC/VBR ≈ 1.32), and maintains stable breakdown with αT = 9.2 × 10−4/°C temperature coefficient.
Its glass-passivated junction ensures robust surge handling up to 200 A IFSM (10 ms half-sine), while the SMC package supports automated placement and meets MSL Level 1 (260 °C reflow). The cathode band denotes polarity, and it is rated for −65 °C to +150 °C junction operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V - defines minimum and maximum voltage at which avalanche conduction begins reliably at 1 mA test current |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 30.6 V @ 49 A - clamping voltage during 10/1000 μs transient, limiting downstream voltage stress |
| PPPM | 1500 W - peak pulse power handling capability under standardized lightning surge waveform |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C ambient |
| TJ max. | +150 °C - maximum allowable junction temperature, defining safe operating area under sustained power dissipation |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, matte tin-plated leads, UL 94 V-0 molding compound. Cathode identified by molded band on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; reverse-biased during clamping |
| Cathode | Avalanche conduction terminal / Clamping output node | Connected to protected line (e.g., sensor supply or data line); carries full transient current during suppression |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against lightning-induced surges and inductive switching spikes without thermal runaway |
| Glass-passivated junction | Improves long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Low clamping voltage (30.6 V @ 49 A) | Reduces voltage overshoot on protected ICs, preserving margin below absolute maximum ratings |
| AEC-Q101 qualified (HE3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS subsystems requiring zero-failure field reliability |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without popcorn cracking or delamination risk |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and LIN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground, clamping transients before they reach regulator inputs. Use Value: Withstands 1500 W surges and maintains VC ≤ 30.6 V, ensuring downstream DC/DC converters remain within safe input range. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC modules from motor drive coupling noise. IC Role / Device Role / Timing Role: Mounted across sensor output and ground to shunt EFT bursts (IEC 61000-4-4) and inductive kickback. Use Value: Low 30.6 V clamping prevents ADC saturation and preserves signal integrity in 0–5 V or 4–20 mA loops. |
| Consumer Appliance Motor Control | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding gate drivers and microcontrollers in washing machine motor inverters from coil flyback energy. IC Role / Device Role / Timing Role: Placed across MOSFET drain-source or supply rail to clamp turn-off spikes during PWM commutation. Use Value: 200 A IFSM rating handles repetitive switching surges; 75 °C/W RθJA enables thermal design without heatsink in compact enclosures. | Use Scenario: Front-end protection of AC/DC adapter inputs against AC line surges (IEC 61000-4-5) and hot-plug transients. IC Role / Device Role / Timing Role: Connected between L/N and earth ground to divert common-mode surges before rectification stage. Use Value: 1500 W PPPM and 18.8 V VWM allow use on 24 V DC input systems with sufficient margin above nominal voltage. |
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 | 600 W PPPM, SMA package, higher RθJA (100 °C/W), same VBR range | Limited to lower-energy threats; unsuitable for automotive load dump per ISO 7637-2 | Select when cost-sensitive consumer designs require basic ESD/EFT protection only |
| 1.5KE22A | Through-hole DO-201 package, 1500 W PPPM, no AEC-Q101 qualification, higher VC (35.5 V) | Not suitable for automated SMT assembly or automotive under-hood environments | Choose for legacy through-hole industrial power supplies where board space and reflow compatibility are not constraints |
Compared with SMAJ22A-E3/57T and 1.5KE22A, SM15T22AHE3_A/H provides superior surge robustness in surface-mount form factor, verified AEC-Q101 qualification, and tighter clamping (30.6 V vs. 35.5 V), making it optimal for high-reliability automotive and industrial edge nodes.
Availability
SM15T22AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and consumer appliance motor control requiring stable component supply and AEC-Q101-compliant surge immunity.
Supply support for SM15T22AHE3_A/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 reliability, efficiency, and application-specific optimization.
The SM15T Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be prevented without compromising footprint or thermal performance.
FAQ
What is the clamping voltage of SM15T22AHE3_A/H under a 10/1000 μs transient?
The SM15T22AHE3_A/H has a maximum clamping voltage (VC) of 30.6 V at 49 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and reflects worst-case voltage seen by protected circuitry during surge events.
Is SM15T22AHE3_A/H qualified for automotive applications?
Yes, SM15T22AHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, confirming suitability for automotive powertrain, body electronics, and ADAS subsystems.
What does the "_A/H" suffix mean in SM15T22AHE3_A/H?
The "_A/H" suffix in SM15T22AHE3_A/H specifies packaging configuration: "A" denotes tape-and-reel format with 7-inch diameter reel, and "H" is the preferred package code for that reel size. The base "HE3" confirms RoHS-compliance and AEC-Q101 qualification.
How does SM15T22AHE3_A/H differ from bidirectional variants like SM15T22CA?
SM15T22AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where directionality matters. In contrast, SM15T22CA is bidirectional, lacks polarity marking, and clamps symmetrically in both directions - suited for AC or differential signal lines but not for DC power rails requiring defined forward/reverse behavior.
What is the thermal resistance of SM15T22AHE3_A/H, and how does it affect layout?
SM15T22AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. To maintain safe junction temperature, PCB layout must provide adequate copper area and avoid excessive trace length between terminals - insufficient copper increases RθJA, risking thermal runaway during repeated surges.
SM15T22AHE3_A/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:
- 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 (SMCJ)
SM15T22AHE3_A/H FAQ
1.How can I place an order for SM15T22AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHE3_A/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 SM15T22AHE3_A/H reliable?
The price and inventory of SM15T22AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T22AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHE3_A/H?
SM15T22AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHE3_A/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 SM15T22AHE3_A/H?
For technical support, including SM15T22AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHE3_A/H requirements.
6.How does Aetrix verify that SM15T22AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T22AHE3_A/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 SM15T22AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T22AHE3_A/H?
All SM15T22AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHE3_A/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 SM15T22AHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T22AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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