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Vishay General Semiconductor - Diodes Division 1.5SMC22A-E3/57T
- Part No.:
- 1.5SMC22A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22A-E3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,538
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Product details
Overview
1.5SMC22A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 18.8 V stand-off voltage (VWM), 30.6 V maximum clamping voltage (VC) at 49 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC22A-E3/57T datasheet, 1.5SMC22A-E3/57T pinout, 1.5SMC22A-E3/57T application, or 1.5SMC22A-E3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, clamping performance under transient stress, thermal derating behavior, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The 1.5SMC22A-E3/57T operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its specified breakdown range (20.9–23.1 V). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while fast response time (<1 ns) enables effective suppression of ESD and lightning-induced transients.
Thermally, it exhibits RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device is RoHS-compliant (E3 suffix), MSL Level 1 rated, and qualified to JESD201 Class 2 for whisker resistance - meeting requirements for automated SMT assembly and high-reliability commercial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche onset window for predictable clamping initiation |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 30.6 V at 49 A - peak clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability under standardized transient waveform |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), relevant for fault-current scenarios |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard PCB pad layout, critical for power dissipation planning |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity marked by cathode band on one end; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt energy to ground |
| Anode (unmarked end) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping fidelity |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and life cycles |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without moisture-related popcorning or delamination |
| RoHS-compliant, halogen-free option available | Meets environmental compliance mandates for global electronics manufacturing and end-of-life handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input circuitry. Use Value: Limits voltage seen by downstream op-amps or microcontroller ADC inputs to ≤30.6 V during 49 A surges, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input channels, absorbing repetitive 10/1000 µs transients without degradation. Use Value: Maintains functional integrity under 0.01% duty cycle surges up to 1500 W, extending module service life in factory automation environments. |
| DC Power Rail Protection | Consumer Power Adapter Output Protection |
Use Scenario: Secondary-side overvoltage suppression on 12–24 V DC power distribution networks in telecom base stations and network switches. IC Role / Device Role / Timing Role: Unidirectional clamping device installed between VOUT and GND to suppress flyback spikes from hot-swap MOSFETs or cable disconnect events. Use Value: Clamps 10/1000 µs surges to ≤30.6 V while dissipating 1500 W peak, preventing brownout or reset of powered Ethernet (PoE) controllers. |
Use Scenario: Output-stage transient suppression in wall-mounted AC/DC adapters for smart home devices, guarding against output short-circuit recovery spikes. IC Role / Device Role / Timing Role: Final-line defense TVS on regulated 5 V/9 V/12 V outputs, activated only during abnormal overvoltage conditions. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), ensuring survivability during output capacitor inrush or fault-clearing events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower PPPM (600 W), same VBR range (20.9–23.1 V), SMB package (smaller footprint, higher RθJA) | Preferred where board space is constrained but surge energy is moderate (e.g., USB port protection) | Select SMBJ22A only if peak transient energy remains ≤600 W; verify thermal margin due to higher RθJA (~110 °C/W) |
| 1.5KE22A | Through-hole DO-201 package, identical VBR/VC/PPPM, higher IFSM (225 A), lower RθJA (~50 °C/W) | Suitable for prototyping, high-power legacy designs, or where manual assembly or mechanical robustness is prioritized | Choose 1.5KE22A for through-hole compatibility or enhanced thermal performance; not drop-in for SMC layouts |
Compared with SMBJ22A, the 1.5SMC22A-E3/57T delivers 2.5× higher surge power handling and better thermal coupling to PCB copper; versus 1.5KE22A, it offers SMT scalability and automated placement - making it optimal for high-volume, space-constrained, and thermally demanding applications.
Availability
1.5SMC22A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives.
Supply support for 1.5SMC22A-E3/57T 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 performance.
The 1.5SMC Series was developed for high-energy transient suppression in compact SMT formats, targeting automotive, industrial, and telecom applications where robustness, repeatability, and automated manufacturability are essential.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC22A-E3/57T?
The 1.5SMC22A-E3/57T has a breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1 mA test current, corresponding to ±5% tolerance around the nominal 22 V rating. This tight VBR spread ensures consistent clamping behavior across production lots and supports reliable design margins in safety-critical circuits.
Is the 1.5SMC22A-E3/57T RoHS-compliant and lead-free?
Yes, the 1.5SMC22A-E3/57T carries the "E3" suffix, indicating full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. Its matte tin-plated leads meet J-STD-002 solderability requirements and JESD201 Class 2 whisker resistance standards, making it suitable for modern lead-free reflow processes.
What is the maximum clamping voltage of the 1.5SMC22A-E3/57T under surge conditions?
The 1.5SMC22A-E3/57T exhibits a maximum clamping voltage (VC) of 30.6 V at 49 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected line during worst-case transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Can the 1.5SMC22A-E3/57T be used in bidirectional configurations?
No - the 1.5SMC22A-E3/57T is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC22CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking on the package.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC22A-E3/57T?
The 1.5SMC22A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must implement minimum recommended pad areas and consider thermal vias - undersized copper will cause excessive temperature rise and premature failure.
1.5SMC22A-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC22A-E3/57T FAQ
1.How can I place an order for 1.5SMC22A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22A-E3/57T 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 1.5SMC22A-E3/57T reliable?
The price and inventory of 1.5SMC22A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC22A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22A-E3/57T?
1.5SMC22A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22A-E3/57T 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 1.5SMC22A-E3/57T?
For technical support, including 1.5SMC22A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC22A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22A-E3/57T 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 1.5SMC22A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC22A-E3/57T?
All 1.5SMC22A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22A-E3/57T, 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 1.5SMC22A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC22A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22A-E3/57T Tags
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