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Vishay General Semiconductor - Diodes Division 1.5SMC56CA-E3/9AT
- Part No.:
- 1.5SMC56CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CA-E3/9AT.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,662
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Product details
Overview
1.5SMC56CA-E3/9AT 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 breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 μs), clamping voltage of 77.0 V at 19.5 A, and operates across -65 °C to +150 °C junction temperature. It is deployed in automotive sensor interfaces and industrial I/O protection where fast response and high surge immunity are critical.
For engineers reviewing the 1.5SMC56CA-E3/9AT datasheet, 1.5SMC56CA-E3/9AT pinout, 1.5SMC56CA-E3/9AT application, or 1.5SMC56CA-E3/9AT equivalent, this part delivers verified bidirectional clamping performance, RoHS-compliant SMC (DO-214AB) packaging, AEC-Q101 qualification readiness (via HE3/HM3 variants), and precise 56 V standoff capability - key selection criteria for ESD and lightning transient suppression in harsh environments.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical breakdown behavior ensures identical clamping in both polarities, eliminating polarity-sensitive layout constraints in AC-coupled or floating signal paths.
The device is rated for 1500 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak, enabling compatibility with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA - defines precise bidirectional conduction threshold for reliable overvoltage triggering |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 77.0 V at 19.5 A - clamping voltage during full 1500 W surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak pulse power handling per 10/1000 μs waveform, enabling protection against lightning-induced transients |
| IPPM | 19.5 A - maximum non-repetitive peak pulse current supported without degradation |
| TJ range | -65 °C to +150 °C - wide operating junction temperature enables use in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical bidirectional junction; no polarity marking required |
| Cathode | Terminal K | Other side of symmetrical bidirectional junction; functionally identical to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware routing in differential or AC lines |
| 1500 W surge rating | Withstands 10/1000 μs transients up to 19.5 A - meets IEC 61000-4-5 Level 4 surge immunity requirements |
| Glass-passivated junction | Ensures stable leakage (<1.0 μA at VWM) and long-term reliability under thermal cycling and humidity |
| RoHS-compliant & MSL-1 | Lead-free matte tin terminations; compatible with leaded and lead-free reflow profiles up to 260 °C peak |
| AEC-Q101 ready | HE3/HM3 variants qualified for automotive applications - same die and package as 1.5SMC56CA-E3/9AT |
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 events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching sensitive analog front-ends or communication ICs. Use Value: Clamps 56 V nominal transients to ≤77 V within nanoseconds, preserving signal integrity and preventing latch-up in 5 V/12 V sensor supply domains. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC input channels, mounted adjacent to terminal blocks to intercept surges before optocoupler isolation stages. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1 μA leakage at 47.8 V to avoid false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and RS-485 data lines in network switches and base stations. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp across VCC/GND and differential signal pairs to suppress coupled lightning surges. Use Value: Symmetric clamping ensures equal protection for positive and negative transients on balanced lines, supporting full-duplex operation without polarity concerns. |
Use Scenario: Input-stage overvoltage suppression in wall-mounted AC/DC adapters for smart home devices subjected to mains-borne surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after bridge rectifier but before bulk capacitor to clamp line-to-ground transients. Use Value: 47.8 V VWM allows safe operation with 36 V DC output rails while clamping 1 kV/1.2 × 50 μs surges to <77 V, preventing capacitor overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA | Same VBR (53.2–58.8 V) and VC (77 V), but lower PPPM = 600 W in SMB (DO-214AA) package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 testing | Select when space-constrained layouts require smaller footprint and surge energy is ≤600 W |
| 1.5KE56CA | Same electrical specs but axial-leaded DO-15 package; higher RθJA (100 °C/W) limits SMT scalability | Requires through-hole assembly; not compatible with automated pick-and-place or reflow processes | Choose only for legacy through-hole designs or prototyping where SMT is unavailable |
Compared with SMBJ56CA and 1.5KE56CA, the 1.5SMC56CA-E3/9AT provides superior 1500 W surge capacity in an SMT-optimized SMC package, enabling higher reliability in automotive and industrial applications where PCB real estate and assembly automation are critical.
Availability
1.5SMC56CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply, RoHS compliance, and AEC-Q101 qualification path.
Supply support for 1.5SMC56CA-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 high-power handling.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in automotive, industrial, and telecom systems demanding high pulse power, low clamping, and AEC-Q101-ready variants - all in standardized SMC packaging.
FAQ
What does the "CA" suffix indicate in 1.5SMC56CA-E3/9AT?
The "CA" suffix in 1.5SMC56CA-E3/9AT denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional "A" variants, the CA version has no cathode band marking and exhibits identical breakdown and clamping characteristics from either terminal, making it ideal for AC-coupled or floating signal lines where polarity cannot be guaranteed.
Is 1.5SMC56CA-E3/9AT RoHS-compliant and halogen-free?
Yes, 1.5SMC56CA-E3/9AT is RoHS-compliant per EU Directive 2011/65/EU, with matte tin-plated leads and lead-free construction. However, it is not halogen-free; that designation applies only to variants with the "M3" suffix (e.g., 1.5SMC56CA-M3/9AT). The "E3" suffix confirms commercial-grade RoHS compliance without halogen restrictions.
What is the maximum clamping voltage of 1.5SMC56CA-E3/9AT under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC56CA-E3/9AT is 77.0 V, measured at its peak pulse current (IPPM) of 19.5 A under the standardized 10/1000 μs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a full-rated 1500 W transient event, ensuring protected ICs remain within safe operating margins.
Can 1.5SMC56CA-E3/9AT be used in automotive applications?
While 1.5SMC56CA-E3/9AT itself is commercial-grade, it shares the same die and SMC package as AEC-Q101-qualified variants (e.g., 1.5SMC56CAHE3_A). Engineers may use 1.5SMC56CA-E3/9AT in non-safety-critical automotive subsystems such as infotainment or body control modules, provided qualification testing is performed per AEC-Q101 requirements for the specific application environment.
What is the thermal resistance of 1.5SMC56CA-E3/9AT, and how does it affect layout?
The 1.5SMC56CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain reliability under repetitive surges, PCB layout must provide adequate copper area and thermal vias - undersized pads increase junction temperature and reduce surge endurance beyond derating curves in Figure 2 of the datasheet.
1.5SMC56CA-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:
- -
- 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC56CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CA-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 1.5SMC56CA-E3/9AT reliable?
The price and inventory of 1.5SMC56CA-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 1.5SMC56CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CA-E3/9AT?
1.5SMC56CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CA-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 1.5SMC56CA-E3/9AT?
For technical support, including 1.5SMC56CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC56CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CA-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 1.5SMC56CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CA-E3/9AT?
All 1.5SMC56CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CA-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 1.5SMC56CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC56CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CA-E3/9AT Tags
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