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Vishay General Semiconductor - Diodes Division 1.5SMC56CA-E3/57T
- Part No.:
- 1.5SMC56CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CA-E3/57T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:850
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Product details
Overview
1.5SMC56CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V standoff voltage (VWM), 62.2–68.8 V breakdown voltage (VBR at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 92.0 V at 16.3 A, and operates across -65 °C to +150 °C junction temperature. It is used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC56CA-E3/57T datasheet, 1.5SMC56CA-E3/57T pinout, 1.5SMC56CA-E3/57T application, or 1.5SMC56CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B surge protector standards.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to deliver fast response (<1 ps) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its symmetrical breakdown behavior ensures identical clamping in both polarities, eliminating polarity-sensitive layout constraints.
The device is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, with derating above 25 °C per Fig. 2 and validated performance on 8.0 mm × 8.0 mm copper pads. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 56 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 62.2–68.8 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events |
| VC (Clamping Voltage) | 92.0 V at 16.3 A - Peak voltage seen by protected circuit during 1500 W transient; critical for downstream IC survival |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capability under 10/1000 µs surge, enabling protection against IEC 61000-4-5 Level 4 surges |
| RθJA (Thermal Resistance) | 75 °C/W - Junction-to-ambient thermal resistance measured on standard 8.0 mm × 8.0 mm pads; informs heatsinking requirements |
| TJ Range | -65 °C to +150 °C - Full operational junction temperature range supporting under-hood automotive and industrial environments |
| UL Recognition | UL 497B QVGQ2 - Underwriters Laboratories recognition for surge protector classification, required for safety-critical system approvals |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Meets UL 94 V-0 flammability rating. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; conducts during negative-going transients |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical PN junction; conducts during positive-going transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions enables single-device protection of AC or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients such as lightning-induced surges (IEC 61000-4-5) and load dump events in automotive systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V/5 V logic |
| AEC-Q101 qualified option | HE3/HM3 variants available; this E3/57T variant is RoHS-compliant commercial grade, suitable for non-automotive industrial use |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing complexity and cost |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from ISO 7637-2 pulse 1/2a/5a transients and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Clamps 56 V line to ≤92 V during 16.3 A surge, preserving integrity of 5 V rail and 12-bit ADC reference stability. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Limits transient voltage to 92 V within 1 ps, preventing latch-up in op-amps and protecting precision instrumentation amplifiers. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and POTS interface ICs from lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: First-stage protection device mounted adjacent to RJ-45 jack, working in concert with GDTs and common-mode chokes. Use Value: Absorbs 1500 W surge energy while maintaining <10 µA leakage at 56 V, ensuring minimal impact on signal integrity and DC bias. |
Use Scenario: Suppressing inductive kickback from brushed DC motors and solenoids in washing machines, HVAC actuators, and power tools. IC Role / Device Role / Timing Role: Snubber across motor terminals or flyback path in H-bridge gate driver circuits. Use Value: Clamps 56 V supply rail to 92 V during 200 A IFSM events, preventing MOSFET avalanche failure and MCU reset from brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA | Same VWM/VBR/VC, but 600 W PPPM and SMB (DO-214AA) package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when board space is constrained and surge energy is ≤600 W |
| 1.5KE56CA | Same electrical specs, but axial-leaded DO-15 package; higher RθJA (~100 °C/W), not SMT-compatible | Requires through-hole assembly; incompatible with automated SMT lines and dense PCB layouts | Select only for prototyping, repair, or legacy through-hole designs |
Compared with SMBJ56CA and 1.5KE56CA, the 1.5SMC56CA-E3/57T delivers 2.5× higher surge power handling in an SMT-optimized package, enabling robust protection in space-constrained automotive and industrial modules without sacrificing manufacturability or thermal performance.
Availability
1.5SMC56CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card protection, and consumer appliance motor control requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for 1.5SMC56CA-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was developed to provide high-power, surface-mount TVS solutions for demanding transient suppression in automotive, industrial, and telecom infrastructure-balancing surge robustness, thermal performance, and automated assembly compatibility.
FAQ
What is the clamping voltage of the 1.5SMC56CA-E3/57T under maximum rated surge current?
The 1.5SMC56CA-E3/57T has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 09-Mar-2026 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC56CA-E3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC56CA-E3/57T AEC-Q101 qualified?
No, the 1.5SMC56CA-E3/57T is RoHS-compliant commercial-grade with base suffix E3 and tape-and-reel packaging code 57T. AEC-Q101 qualification is available only in variants with HE3 or HM3 suffixes (e.g., 1.5SMC56CAHE3_A). The 1.5SMC56CA-E3/57T meets all electrical and mechanical specifications of the family but lacks the extended temperature cycling, humidity testing, and failure analysis required for automotive qualification. For automotive designs, specify the HE3 variant.
What is the standoff voltage (VWM) and why does it matter for the 1.5SMC56CA-E3/57T?
The 1.5SMC56CA-E3/57T has a standoff voltage (VWM) of 56 V, meaning it remains in high-impedance blocking mode for reverse voltages up to this level. This parameter ensures no significant leakage current flows during normal operation-critical for preserving signal integrity and power efficiency in 48 V or 56 V nominal systems. Exceeding VWM risks premature conduction; the 1.5SMC56CA-E3/57T's 56 V rating provides a safe margin below its 62.2–68.8 V breakdown range.
Can the 1.5SMC56CA-E3/57T be used in bidirectional signal lines like RS-485 or CAN?
Yes, the 1.5SMC56CA-E3/57T is explicitly designed for bidirectional applications-the "CA" suffix denotes symmetrical breakdown and clamping in both polarities. It is commonly deployed on RS-485 differential pairs and CAN bus lines where transients can occur with either polarity. Its low capacitance (typ. <100 pF at 0 V) and sub-nanosecond response preserve signal edge integrity, making the 1.5SMC56CA-E3/57T suitable for data rates up to 1 Mbps without distortion.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC56CA-E3/57T?
The 1.5SMC56CA-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, as specified in the Vishay datasheet. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, risking thermal runaway during repetitive surges. To maintain reliability, ensure each SMC (DO-214AB) terminal connects to ≥8 mm² of internal or external copper, and avoid narrow traces between the 1.5SMC56CA-E3/57T and ground/power planes.
1.5SMC56CA-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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- 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)
1.5SMC56CA-E3/57T FAQ
1.How can I place an order for 1.5SMC56CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CA-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 1.5SMC56CA-E3/57T reliable?
The price and inventory of 1.5SMC56CA-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 1.5SMC56CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CA-E3/57T?
1.5SMC56CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CA-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 1.5SMC56CA-E3/57T?
For technical support, including 1.5SMC56CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC56CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CA-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 1.5SMC56CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CA-E3/57T?
All 1.5SMC56CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CA-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 1.5SMC56CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC56CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CA-E3/57T Tags
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