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Taiwan Semiconductor Corporation 1.5SMC56CA
- Part No.:
- 1.5SMC56CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CA.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,390
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Product details
Overview
1.5SMC56CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 56V, clamping voltage of 77.0V at 20A peak pulse current, and working stand-off voltage of 47.8V. It provides ESD and surge protection for DC power rails and signal lines in telecom interfaces, industrial I/O modules, and automotive body electronics.
For engineers reviewing the 1.5SMC56CA datasheet, 1.5SMC56CA pinout, 1.5SMC56CA application, or 1.5SMC56CA equivalent, this page delivers verified electrical specs, DO-214AB package details, bidirectional clamping behavior, thermal resistance values, and real-world use cases aligned with ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance.
Technical Context
The 1.5SMC56CA employs a glass-passivated silicon junction optimized for fast transient suppression with sub-1ps response time and low leakage (<1μA at 47.8V). Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management.
Designed for surface-mount assembly on PCBs with high-reliability requirements, it features UL 94V-0 molding compound, JESD201 Class 2 whisker-resistant matte tin plating, and moisture sensitivity level 1 - supporting reflow compatibility without dry-pack handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2V / 58.8V - Ensures reliable conduction onset across manufacturing tolerance and temperature variation |
| VWM | 47.8V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | 77.0V at 20A - Clamped voltage during 10/1000μs surge, defining protected circuit's maximum overvoltage stress |
| PPK | 1500W - Peak pulse power handling per single 10/1000μs waveform, derated above 25°C ambient |
| RθJA | 50°C/W - Junction-to-ambient thermal resistance under standard JEDEC PCB mounting conditions |
| IR @ VWM | <1μA - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max | +150°C - Maximum junction temperature enabling operation in under-hood or enclosed industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for bidirectional surge clamping; no polarity dependency in layout |
| Case / Body | Thermal interface | Exposed metal frame conducts heat to PCB copper pour; requires minimum 25 mm² thermal pad for rated PPK |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity awareness |
| ISO 7637-2 compliance | Validated against automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| Sub-1ps response time | Clamps ESD events before sensitive ICs experience overstress, meeting IEC 61000-4-2 Level 4 |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained applications |
Applications
| Industrial PLC I/O Protection | Automotive CAN Bus Interface |
|---|---|
Use Scenario: Protecting 24V DC digital input channels in programmable logic controllers from inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping transients within 77.0V to preserve input comparator thresholds. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by limiting overvoltage to safe levels during 1500W surge events. | Use Scenario: Safeguarding CAN_H/CAN_L differential pair against battery dump and ESD in vehicle body control modules. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to chassis ground, absorbing common-mode transients up to ±20A. Use Value: Maintains CAN signal integrity during ISO 7637-2 Pulse 2b (load dump) by clamping to ≤77.0V while preserving <1μA leakage at 12V nominal bus voltage. |
| Telecom Ethernet Port Surge Suppression | Medical Equipment Power Input Stage |
Use Scenario: Shielding PoE-powered Ethernet PHY interfaces from lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Bidirectional TVS installed on each twisted pair (TX+/TX−, RX+/RX−), referenced to local ground plane. Use Value: Limits induced transients to 77.0V peak, preventing damage to magnetics and PHY transceivers during 10/1000μs surges per IEC 61000-4-5. | Use Scenario: Guarding isolated 48V DC input rails in diagnostic imaging subsystems against mains coupling and ESD. IC Role / Device Role / Timing Role: Primary-side TVS mounted across input filter capacitor, shunting surge energy before isolation barrier. Use Value: Withstands 1500W pulses without degradation, ensuring uninterrupted operation in safety-critical systems where failure is not an option. |
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 (Bourns) | Same DO-214AA package, 600W rating, lower PPK and higher VC (93.6V @ 6.4A) | Not suitable for 1500W ISO 7637-2 Pulse 5a; limited to lower-energy transients | Select only when board space constraints require smaller SMB package and surge energy is ≤600W |
| SMCJ56CA (Littelfuse) | Identical DO-214AB package, same 1500W rating, VC = 77.0V @ 20A, but higher typical IR (2.0μA @ 47.8V) | Compatible drop-in replacement with identical clamping performance but slightly higher leakage | Preferred when sourcing flexibility is required and leakage budget allows ≤2μA at VWM |
Compared with SMBJ56CA and SMCJ56CA, the 1.5SMC56CA delivers identical 1500W surge capability and 77.0V clamping in the DO-214AB footprint, while offering best-in-class leakage (<1μA) - critical for battery-powered or high-impedance sensing nodes.
Availability
1.5SMC56CA is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, telecommunications infrastructure, and medical device power input stages requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC56CA 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
Taiwan Semiconductor Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, automotive, and consumer markets since 1979.
The 1.5SMCxxCA series belongs to TSC's high-power surface-mount TVS portfolio, engineered specifically for robust transient immunity in harsh electromagnetic environments - including automotive load-dump, industrial switching noise, and telecom lightning surges.
FAQ
What is the clamping voltage of the 1.5SMC56CA under a 10/1000μs surge?
The 1.5SMC56CA has a maximum clamping voltage (VC) of 77.0V at 20A peak pulse current (IPPM) for a 10/1000μs waveform. This value is measured per Fig.5 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 1.5SMC56CA maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC56CA unidirectional or bidirectional?
The 1.5SMC56CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It provides symmetrical clamping in both polarities, making it suitable for AC signal lines, differential buses like CAN or RS-485, and floating DC rails where polarity reversal may occur. Unlike unidirectional variants (e.g., 1.5SMC56C), the 1.5SMC56CA does not require orientation during placement.
Does the 1.5SMC56CA meet automotive surge standards?
Yes, the 1.5SMC56CA meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (inductive switch-off), Pulse 3a (capacitive discharge), and Pulse 3b (ignition system noise). Its 1500W peak power rating and 77.0V clamping voltage enable compliance with these transients when properly mounted on a thermally adequate PCB layout.
What is the maximum leakage current of the 1.5SMC56CA at its working voltage?
The 1.5SMC56CA exhibits a maximum blocking leakage current (IR) of less than 1μA at its working stand-off voltage (VWM) of 47.8V, measured at 25°C. This ultra-low leakage preserves signal fidelity in high-impedance sensor interfaces and minimizes standby power loss in battery-operated equipment - a key differentiator versus alternatives with higher IR specifications.
What package type does the 1.5SMC56CA use, and what are its key mechanical features?
The 1.5SMC56CA uses the DO-214AB (SMC) surface-mount package, featuring a UL 94V-0 compliant molding compound, matte tin-plated leads compliant with J-STD-002, and JESD201 Class 2 whisker resistance. Its 0.210g mass and standardized pad layout support automated placement and reflow soldering without special handling - unlike moisture-sensitive level 3+ devices.
1.5SMC56CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- 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):
- 20A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC56CA FAQ
1.How can I place an order for 1.5SMC56CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CA 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 reliable?
The price and inventory of 1.5SMC56CA 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 is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CA?
1.5SMC56CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CA 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?
For technical support, including 1.5SMC56CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CA requirements.
6.How does Aetrix verify that 1.5SMC56CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CA 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 meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CA?
All 1.5SMC56CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CA, 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 part is unused and in its original packaging.
Return procedure for 1.5SMC56CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CA Tags
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