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Vishay General Semiconductor - Diodes Division 1.5SMC22A-E3/9AT
- Part No.:
- 1.5SMC22A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22A-E3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,593
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Product details
Overview
1.5SMC22A-E3/9AT 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), clamps to ≤30.6 V at 49 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 μs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC22A-E3/9AT datasheet, 1.5SMC22A-E3/9AT pinout, 1.5SMC22A-E3/9AT application, or 1.5SMC22A-E3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 10/1000 μs transients, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 18.8 V), then rapidly avalanches when reverse voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), has matte tin-plated leads, and achieves thermal resistance of 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads - enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤30.6 V at 49 A - clamping voltage during 1500 W 10/1000 μs surge, limiting stress on protected ICs |
| IPPM | 49 A - peak pulse current handling capacity under standardized surge waveform |
| PPPM | 1500 W - peak pulse power rating confirming suitability for lightning and inductive-switching transients |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance indicating required PCB copper area for thermal management |
Pinout & Package
Package: SMC (DO-214AB) - surface-mount, low-profile plastic case with matte tin-plated leads; dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| MSL Level 1 moisture sensitivity | Allows direct placement into reflow ovens without baking, reducing manufacturing overhead |
| AEC-Q101 qualification option (HE3/HM3) | Validates suitability for automotive powertrain and body electronics per stress-test requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response time) |
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 ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input stages. Use Value: Maintains signal integrity by limiting clamped voltage to ≤30.6 V while surviving 49 A surges - preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V DC input channels, absorbing energy from >100 mJ switching events. Use Value: Delivers 1500 W pulse handling with <1 ns response, ensuring microcontroller GPIOs remain within safe operating area during factory floor EMI events. |
| Telecom Power Supply Protection | Consumer Appliance Motor Control |
Use Scenario: Secondary-side overvoltage suppression on 12 V/48 V telecom power rails subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Standoff-rated TVS across output rail and ground, activated only during fault conditions to prevent regulator failure. Use Value: With 18.8 V VWM, it remains fully inactive during nominal operation yet triggers reliably at 20.9 V - avoiding false trips while ensuring fast clamping. |
Use Scenario: Protecting gate drivers and MCU pins in smart home appliance motor inverters from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on half-bridge driver supply lines and feedback sensing nodes to suppress <100 ns ringing. Use Value: Low Rsurge and 30.6 V clamping limit voltage stress on 60 V-rated MOSFETs and op-amps, extending field lifetime in high-cycle applications. |
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-E3/52T | Lower PPPM (600 W), same VBR range, SMB (DO-214AA) package - 30% smaller footprint, lower surge capacity | Better suited for space-constrained consumer ports; insufficient for 1500 W industrial surges | Select when board area is critical and surge threat level is ≤600 W (e.g., USB-C PD port protection) |
| 1.5KE22A-E3/54 | Through-hole TO-204AE (DO-15) package, identical electrical specs, higher RθJA (~100 °C/W) | Requires wave soldering; less compatible with automated SMT lines; better for prototyping or legacy repair | Choose for manual assembly, high-reliability through-hole designs, or where thermal mass of leadframe aids transient dissipation |
Compared with SMBJ22A-E3/52T and 1.5KE22A-E3/54, the 1.5SMC22A-E3/9AT uniquely balances 1500 W surge capability, SMC package manufacturability, and automotive-grade process control - making it optimal for volume SMT production of ruggedized electronics requiring certified transient immunity.
Availability
1.5SMC22A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supplies requiring stable component supply, RoHS-compliant materials, and consistent SMC (DO-214AB) packaging across production lots.
Supply support for 1.5SMC22A-E3/9AT 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, precision, and application-specific validation.
The 1.5SMC Series was engineered for high-energy transient suppression in automotive, industrial, and telecom systems - prioritizing repeatable clamping, low leakage, and seamless SMT integration without compromising surge robustness.
FAQ
What is the polarity configuration of the 1.5SMC22A-E3/9AT?
The 1.5SMC22A-E3/9AT is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMC (DO-214AB) package body, and it conducts only when the cathode is biased positively relative to the anode - making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like 1.5SMC22CA, which protect AC or floating signals.
Does the 1.5SMC22A-E3/9AT meet automotive qualification standards?
The 1.5SMC22A-E3/9AT itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes such as 1.5SMC22AHE3_A/I. These HE3-suffix parts undergo stress testing per AEC-Q101 Rev D and are validated for automotive powertrain and body electronics - the 1.5SMC22A-E3/9AT base part does not carry that qualification unless explicitly ordered with HE3 or HM3 suffixes.
What is the maximum clamping voltage of the 1.5SMC22A-E3/9AT under surge conditions?
The 1.5SMC22A-E3/9AT clamps to a maximum of 30.6 V when subjected to its rated 49 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across temperature and production lot - critical for ensuring downstream 3.3 V or 5 V ICs remain within absolute maximum ratings during transient events.
How does the 1.5SMC22A-E3/9AT compare to the 1.5SMC22CA in circuit design?
The 1.5SMC22A-E3/9AT is unidirectional and protects only against reverse-polarity overvoltages on DC lines, while the 1.5SMC22CA is bidirectional and symmetrically clamps both positive and negative transients - ideal for AC-coupled data lines or differential buses. Their VBR, VC, and PPPM are identical, but layout must respect polarity marking for the 1.5SMC22A-E3/9AT, whereas the 1.5SMC22CA has no polarity marking.
What PCB pad layout is recommended for optimal thermal performance of the 1.5SMC22A-E3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for the 1.5SMC22A-E3/9AT to achieve rated 1500 W pulse power and 75 °C/W thermal resistance. Using smaller pads reduces surge capability and risks thermal runaway during repetitive transients - especially critical in automotive and industrial applications where ambient temperatures exceed 85 °C.
1.5SMC22A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC22A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22A-E3/9AT 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-E3/9AT reliable?
The price and inventory of 1.5SMC22A-E3/9AT 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-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC22A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22A-E3/9AT?
1.5SMC22A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22A-E3/9AT 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-E3/9AT?
For technical support, including 1.5SMC22A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC22A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC22A-E3/9AT?
All 1.5SMC22A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC22A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22A-E3/9AT Tags
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