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Vishay General Semiconductor - Diodes Division 1.5SMC20CA-E3/57T
- Part No.:
- 1.5SMC20CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CA-E3/57T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
1.5SMC20CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 20 V standoff voltage (VWM), 22.8 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), and clamps to ≤33.2 V at 45.2 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC20CA-E3/57T datasheet, 1.5SMC20CA-E3/57T pinout, 1.5SMC20CA-E3/57T application, or 1.5SMC20CA-E3/57T equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under surge stress, thermal derating curves, and RoHS-compliant AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5SMC20CA-E3/57T operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 17.1 V).
Designed for surface-mount use in SMC (DO-214AB) package, it delivers 1500 W surge handling per 10/1000 µs waveform with <1 ns response time and low incremental surge resistance - critical for suppressing ESD, lightning-induced transients, and inductive switching spikes in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - maximum continuous reverse voltage before significant conduction; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 22.8 V min / 25.2 V max at 1.0 mA - precise avalanche onset ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 33.2 V at 45.2 A IPPM - limits downstream voltage stress on protected ICs or MOSFETs during 10/1000 µs surges |
| PPPM (Peak Pulse Power) | 1500 W - sustains high-energy transients without failure when mounted on 8.0 mm × 8.0 mm copper pads |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - negligible standby current preserves system efficiency and avoids false triggering |
| TJ max | +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Symmetrical terminal - conducts during positive overvoltage; identical to cathode in bidirectional operation |
| Cathode | Transient current entry (negative half-cycle) | Symmetrical terminal - conducts during negative overvoltage; functionally interchangeable with anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or ungrounded sensors without polarity concerns |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly laid out on PCB with thermal relief pads |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot across protected components - critical for 3.3 V/5 V logic and automotive CAN/LIN interfaces |
| AEC-Q101 qualified option | HE3/HM3 variants available for automotive applications requiring validated reliability and extended temperature cycling |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard SMT assembly without baking |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor supply and ground to clamp transients before they reach ADC input or signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and rail-to-rail op-amps operating at ±5 V supply rails. |
Use Scenario: Shielding digital input channels on programmable logic controllers from induced surges on 24 V DC field wiring. IC Role / Device Role / Timing Role: Parallel-connected TVS at terminal block entry point to divert >1 kV transients away from optocoupler input stages. Use Value: Maintains functional safety integrity by limiting voltage seen by 5 V logic-level optoisolators to <33.2 V during 10/1000 µs surges. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS across A/B differential pair and ground to suppress asymmetric transients while preserving signal integrity. Use Value: Enables reliable operation up to 20 Mbps data rate by limiting junction capacitance to <200 pF at zero bias (per typical curve Fig. 4). |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB 2.0 host ports against hot-plug inrush and adapter fault conditions. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary polyfuse, triggered only during sustained overvoltage beyond 5.5 V. Use Value: Complements primary protection by clamping VBUS to ≤33.2 V during 1500 W surges - preventing damage to USB controller PHY and ESD diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM (17.1 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for high-power industrial motor drives | Select when board space is constrained and surge energy does not exceed 600 W - verify thermal performance with reduced copper area |
| 1.5KE20CA | Same VWM and clamping, axial-leaded DO-15 package, higher RθJA (60 °C/W), lead-free plating only on M3 variant | Requires through-hole assembly; incompatible with automated SMT lines; less suitable for vibration-prone automotive mounts | Choose for legacy designs or cost-sensitive prototyping where SMT infrastructure is unavailable |
Compared with SMBJ20CA and 1.5KE20CA, the 1.5SMC20CA-E3/57T provides superior surge robustness (1500 W vs. 600 W/600 W), optimized SMT manufacturability, and tighter thermal resistance (RθJL = 15 °C/W) - making it preferred for high-reliability automotive and industrial applications demanding repeatable surge immunity.
Availability
1.5SMC20CA-E3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for 1.5SMC20CA-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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20CA-E3/57T at its rated peak pulse current?
The 1.5SMC20CA-E3/57T clamps to a maximum of 33.2 V at its rated peak pulse current of 45.2 A under a 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - critical for achieving full 1500 W surge capability. Exceeding recommended pad layout increases thermal impedance and may elevate VC.
Is the 1.5SMC20CA-E3/57T suitable for automotive applications?
Yes - the 1.5SMC20CA-E3/57T is RoHS-compliant and offered in AEC-Q101-qualified variants (e.g., 1.5SMC20CAHE3_A). While the -E3/57T suffix denotes commercial-grade qualification, its construction (glass-passivated junction, MSL Level 1, TJ max = +150 °C) meets core automotive environmental requirements. For certified automotive use, specify HE3 or HM3 suffixes.
How does the bidirectional configuration of the 1.5SMC20CA-E3/57T affect its circuit placement?
The 1.5SMC20CA-E3/57T has no polarity marking and functions identically in both directions - allowing direct placement across any two nodes requiring symmetrical overvoltage protection, such as differential signal pairs (RS-485 A/B), AC power inputs, or ungrounded sensor bridges. No orientation check is needed during SMT placement.
What is the maximum reverse leakage current of the 1.5SMC20CA-E3/57T at its standoff voltage?
The 1.5SMC20CA-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at its standoff voltage (VWM) of 17.1 V, measured at TA = 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor circuits and battery-powered systems where standby current must be tightly controlled.
Can the 1.5SMC20CA-E3/57T replace a unidirectional TVS like 1.5SMC20A-E3/57T in existing designs?
No - the 1.5SMC20CA-E3/57T is bidirectional and lacks polarity marking, whereas 1.5SMC20A-E3/57T is unidirectional with cathode band identification. Substitution requires verifying that the protected circuit does not rely on DC blocking or polarity-specific conduction. In AC or differential paths, the CA version is appropriate; in DC supply lines with defined ground reference, the A version remains necessary.
1.5SMC20CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC20CA-E3/57T FAQ
1.How can I place an order for 1.5SMC20CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CA-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 1.5SMC20CA-E3/57T reliable?
The price and inventory of 1.5SMC20CA-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 1.5SMC20CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CA-E3/57T?
1.5SMC20CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CA-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 1.5SMC20CA-E3/57T?
For technical support, including 1.5SMC20CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC20CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CA-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 1.5SMC20CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CA-E3/57T?
All 1.5SMC20CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CA-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 1.5SMC20CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC20CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CA-E3/57T Tags
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