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Vishay General Semiconductor - Diodes Division 1.5SMC20A-E3/57T
- Part No.:
- 1.5SMC20A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20A-E3/57T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC20A-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 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V stand-off voltage (VWM), clamps to ≤27.7 V at 54.2 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC20A-E3/57T datasheet, 1.5SMC20A-E3/57T pinout, 1.5SMC20A-E3/57T application, or 1.5SMC20A-E3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, 150 °C max junction temperature, low incremental surge resistance, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
The 1.5SMC20A-E3/57T operates as a clamping-type TVS diode that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (19.0–21.0 V), limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), critical for protecting sensitive downstream circuitry from ESD, lightning-induced surges, and inductive switching spikes.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to 150 °C junction temperature when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise avalanche initiation window for repeatable clamping behavior |
| VWM | 17.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤27.7 V at 54.2 A - clamping voltage under full 1500 W surge, determining protected circuit's peak stress level |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform, defining surge energy absorption capability |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting high-energy inductive load switching events |
| TJ max | +150 °C - maximum junction temperature, enabling use in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 0.305" × 0.320" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line in unidirectional configuration | Reference node for reverse-biased clamping operation; ties to lower-potential side of protected circuit |
| Cathode | Current exit point in forward bias; marked with band; connected to ground or return path | Clamping reference node - surge current flows from Anode to Cathode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients such as ISO 7637-2 Pulse 5a without derating in standard PCB layouts |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA at VWM) across temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
| AEC-Q101 qualification option (HE3/HM3) | Validates reliability for automotive powertrain and body electronics applications requiring zero-defect robustness |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 17.1 V. Use Value: Limits peak rail voltage to ≤27.7 V during 1500 W pulses, preventing damage to 36 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS installed at connector interface to shunt fast transients before reaching precision amplifier inputs. Use Value: Sub-1 ns response and low capacitance preserve signal integrity while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Safeguarding PoE-powered Ethernet ports against lightning-induced common-mode surges on twisted pairs. IC Role / Device Role / Timing Role: Paired unidirectional 1.5SMC20A-E3/57T units protect each conductor relative to ground in differential configurations. Use Value: 54.2 A peak pulse current capacity handles 10/1000 μs surges up to 1.5 kW without degradation across 1000+ events. |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters after rectification and bulk capacitance. IC Role / Device Role / Timing Role: Clamping diode placed across output capacitor to prevent regulator latch-up during no-load overvoltage faults. Use Value: 17.1 V stand-off supports 19 V nominal outputs while clamping to 27.7 V to avoid exceeding 30 V absolute maximum ratings of downstream ICs. |
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 | Same VWM (17.1 V) and VC (27.7 V), but lower PPPM = 600 W and smaller SMB (DO-214AA) package | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump or telecom lightning standards | Select when board space is constrained and surge energy remains below 600 W - verify thermal margin with RθJA = 110 °C/W |
| 1.5KE20A | Through-hole TO-204AE (DO-15) package; identical electrical specs but higher RθJA (100 °C/W) and no MSL Level 1 rating | Not compatible with automated SMT lines; requires wave soldering and larger PCB real estate | Choose only for legacy through-hole designs or prototyping where reflow compatibility and compactness are not required |
Compared with SMBJ20A and 1.5KE20A, the 1.5SMC20A-E3/57T uniquely balances 1500 W surge capability, SMC surface-mount compatibility, and MSL Level 1 process readiness - making it optimal for high-reliability automotive and industrial production where both energy handling and manufacturability matter.
Availability
1.5SMC20A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, telecom line card design, and consumer power adapter development requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC20A-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 to deliver high-power, surface-mount transient suppression for harsh-environment applications including automotive, industrial control, and communications infrastructure - prioritizing clamping precision, surge endurance, and SMT manufacturability.
FAQ
What is the breakdown voltage range of the 1.5SMC20A-E3/57T?
The 1.5SMC20A-E3/57T has a guaranteed breakdown voltage (VBR) range of 19.0 V to 21.0 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping onset across production lots and supports precise overvoltage protection design margins in circuits like 12 V automotive systems where 17.1 V stand-off must reliably block normal operation while responding to transients.
Is the 1.5SMC20A-E3/57T suitable for automotive applications?
Yes - the 1.5SMC20A-E3/57T is RoHS-compliant and offered in AEC-Q101-qualified variants (e.g., 1.5SMC20AHE3_A). While the -E3/57T suffix itself denotes commercial-grade RoHS compliance, its construction - glass-passivated junction, 150 °C TJ max, MSL Level 1 rating, and 200 A IFSM - aligns with automotive environmental and surge requirements. For certified deployment, specify the HE3 suffix version.
What does the "-E3/57T" suffix indicate for the 1.5SMC20A-E3/57T?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/57T" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This format enables direct use in high-speed pick-and-place SMT assembly lines and complies with J-STD-002 solderability and JESD 22-B102 whisker resistance standards.
How does the 1.5SMC20A-E3/57T compare to bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20A-E3/57T is unidirectional and features a cathode band marking; it conducts only in reverse avalanche and blocks forward current beyond ~3.5 V. In contrast, 1.5SMC20CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Use 1.5SMC20A-E3/57T for DC rail protection where polarity is fixed; choose the CA variant for AC-coupled or floating signal lines requiring dual-direction suppression.
What is the maximum clamping voltage of the 1.5SMC20A-E3/57T under surge conditions?
The 1.5SMC20A-E3/57T clamps to a maximum of 27.7 V when subjected to its rated peak pulse current of 54.2 A (10/1000 μs waveform). This value - specified in the Vishay datasheet Document Number 88303 - defines the upper voltage limit imposed on protected circuitry during worst-case transients and is critical for ensuring downstream components remain within their absolute maximum ratings.
1.5SMC20A-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):
- 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-E3/57T FAQ
1.How can I place an order for 1.5SMC20A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20A-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 1.5SMC20A-E3/57T reliable?
The price and inventory of 1.5SMC20A-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 1.5SMC20A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC20A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20A-E3/57T?
1.5SMC20A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20A-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 1.5SMC20A-E3/57T?
For technical support, including 1.5SMC20A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC20A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20A-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 1.5SMC20A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC20A-E3/57T?
All 1.5SMC20A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20A-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 1.5SMC20A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC20A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20A-E3/57T Tags
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