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Vishay General Semiconductor - Diodes Division 1.5SMC20A-E3/9AT
- Part No.:
- 1.5SMC20A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20A-E3/9AT.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
1.5SMC20A-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 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V stand-off voltage (VWM), and clamps transients to ≤27.7 V at 54.2 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is widely deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC20A-E3/9AT datasheet, 1.5SMC20A-E3/9AT pinout, 1.5SMC20A-E3/9AT application, or 1.5SMC20A-E3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 10/1000 µs surges, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a fast-acting shunt protector, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.090 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across operating range. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads, supporting reliable power dissipation up to 6.5 W continuous.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise clamping onset threshold for design margining |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤27.7 V at 54.2 A - peak clamped voltage during 10/1000 µs transient, critical for downstream IC survivability |
| PPPM | 1500 W - peak pulse power handling capability under standardized lightning/surge waveform |
| IFSM | 200 A - 8.3 ms half-sine surge current rating, supports inductive load switching events |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm height and 7.75 mm length, compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak). Polarity indicated by cathode band; anode and cathode terminals are axially oriented along the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias reference | Connected to circuit ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Clamping output / Surge sink path | Connected to protected line; conducts during overvoltage to shunt energy to ground |
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 in standard layouts |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing without baking, reducing manufacturing overhead |
| AEC-Q101 qualification option | HE3/HM3 variants support automotive-grade deployment in ADAS sensors and body control modules |
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 ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, clamping transients before they reach the transceiver's input pins. Use Value: Limits induced voltage to ≤27.7 V during 54.2 A surges, preserving transceiver integrity per ISO 16750-2 Pulse 5a requirements. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, mounted adjacent to connector entry point. Use Value: Absorbs 1500 W pulses without degradation, maintaining channel isolation and preventing false triggering or latch-up. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side transient suppression on 12–24 V DC outputs of wall adapters and USB-C PD power supplies. IC Role / Device Role / Timing Role: Final-stage protector downstream of DC-DC converter, guarding connected devices from output overvoltage faults. Use Value: Clamps fault-induced spikes to <28 V within nanoseconds, preventing damage to USB peripherals or embedded controllers. |
Use Scenario: Protection of Ethernet PHY interface power rails (e.g., 3.3 V, 5 V) against induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Rail-to-rail TVS on supply lines feeding PHY ICs, coordinated with common-mode chokes. Use Value: Maintains <1 µA leakage at 17.1 V, avoiding quiescent current impact while enabling 1500 W surge absorption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower PPPM (600 W), same VBR range, SMB (DO-214AA) package - 30% smaller footprint, 40% lower surge capacity | Suitable only for lower-energy threats (IEC 61000-4-2 ESD, not full lightning) | Select when board space is constrained and threat level is limited to ESD or low-duty-cycle switching noise |
| 1.5KE20A | Through-hole TO-204AE (DO-41), identical electrical specs but incompatible mounting - requires PCB redesign | Legacy designs with through-hole assembly infrastructure; no SMT compatibility | Choose only for repair/replacement in existing through-hole systems; not recommended for new SMT designs |
Compared with SMBJ20A and 1.5KE20A, the 1.5SMC20A-E3/9AT delivers optimal balance of high-energy surge handling (1500 W), SMT manufacturability, and automotive-qualified variants - making it the preferred choice for new industrial and automotive electronics requiring robust, scalable protection without layout compromise.
Availability
1.5SMC20A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power rail protection requiring stable component supply, RoHS-compliant materials, and consistent tape-and-reel delivery.
Supply support for 1.5SMC20A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and communications systems where compact size, repeatable clamping, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20A-E3/9AT under maximum surge conditions?
The 1.5SMC20A-E3/9AT clamps to a maximum of 27.7 V when subjected to its rated 54.2 A peak pulse current (10/1000 µs waveform). This value is measured at the device terminals under standard test conditions (25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper limit of voltage seen by downstream circuitry during worst-case transients.
Is the 1.5SMC20A-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC20A-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC20A-M3/9AT) must be selected - both meet JESD 201 Class 2 whisker resistance requirements.
Does the 1.5SMC20A-E3/9AT have AEC-Q101 qualification?
The base 1.5SMC20A-E3/9AT is not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under the HE3 (RoHS-compliant + AEC-Q101) and HM3 (halogen-free + RoHS + AEC-Q101) suffixes - for example, 1.5SMC20AHE3_A/I - which share identical electrical characteristics and SMC packaging.
What is the maximum operating temperature for the 1.5SMC20A-E3/9AT?
The 1.5SMC20A-E3/9AT has a maximum junction temperature (TJ) rating of +150 °C and an operating storage temperature range of −65 °C to +150 °C. Its thermal resistance (RθJA) is 75 °C/W under standard mounting conditions, allowing safe continuous operation at ambient temperatures up to +85 °C with appropriate PCB copper area.
How does the 1.5SMC20A-E3/9AT differ from bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20A-E3/9AT is unidirectional and blocks reverse current until breakdown, making it ideal for DC-biased lines such as power rails or single-ended signals. In contrast, 1.5SMC20CA is bidirectional - symmetric in both polarities - and suited for AC-coupled or floating lines like data buses. Their VBR, VC, and PPPM ratings are identical, but polarity and application context differ fundamentally.
1.5SMC20A-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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20A-E3/9AT FAQ
1.How can I place an order for 1.5SMC20A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20A-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 1.5SMC20A-E3/9AT reliable?
The price and inventory of 1.5SMC20A-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 1.5SMC20A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC20A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20A-E3/9AT?
1.5SMC20A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20A-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 1.5SMC20A-E3/9AT?
For technical support, including 1.5SMC20A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC20A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20A-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 1.5SMC20A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC20A-E3/9AT?
All 1.5SMC20A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20A-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 1.5SMC20A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC20A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20A-E3/9AT Tags
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