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Taiwan Semiconductor Corporation 1.5SMC43CA
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- Part No.:
- 1.5SMC43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CA.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,757
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Product details
Overview
1.5SMC43CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 43V breakdown voltage (min 40.9V, max 45.2V), 1500W peak pulse power rating, 36.8V working stand-off voltage, <1μA leakage at VWM, and clamps transients to ≤59.3V at 26A peak impulse current. It is used in automotive infotainment power rails to protect CAN transceivers from ISO 7637-2 Pulse 1/2a/2b/3a/3b surges.
For engineers reviewing the 1.5SMC43CA datasheet, 1.5SMC43CA pinout, 1.5SMC43CA application, or 1.5SMC43CA equivalent, this page delivers verified electrical specs, DO-214AB package details, bidirectional clamping behavior, thermal resistance values, and direct alternatives for ESD and load-switching surge mitigation in industrial and automotive systems.
Technical Context
The 1.5SMC43CA operates as a symmetrical (bidirectional) avalanche diode with glass-passivated junction, enabling identical clamping performance in both polarities. Its fast response time (<1.0 ps) ensures protection against ESD and lightning-induced transients before sensitive downstream circuitry is damaged.
It complies with ISO 7637-2 for automotive transient immunity and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1. Thermal design is supported by RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation up to TJ = +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9V / 45.2V - Ensures consistent avalanche initiation across production lots and temperature range. |
| VWM | 36.8V - Maximum continuous DC or RMS voltage the device blocks without significant leakage. |
| IPPM | 26A - Peak surge current it safely shunts during a 10/1000μs waveform without failure. |
| VC@IPPM | ≤59.3V - Clamped voltage seen by protected circuit under full-rated surge, defining protection margin. |
| PPK | 1500W - Peak pulse power handling capability per single non-repetitive event (1ms). |
| TJ max | +150°C - Maximum junction temperature allowing sustained operation in under-hood or enclosed industrial environments. |
| RθJA | 50°C/W - Enables thermal estimation on standard FR-4 PCBs with minimal copper area. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Surge input / line side | Accepts transient energy from either polarity; connects to protected line (e.g., CAN_H or +12V rail). |
| Cathode (Terminal 2) | Surge input / line side | Identical to Terminal 1 in bidirectional operation; no polarity marking required for 1.5SMC43CA. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b), eliminating need for additional qualification testing. |
| MSL Level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly processes without moisture sensitivity concerns. |
| 1.0ps typical response time | Clamps ESD events (IEC 61000-4-2) before logic-level ICs experience latch-up or gate oxide damage. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental directives for industrial and automotive supply chains. |
Applications
| Automotive Power Rail Protection | Industrial Ethernet Port Protection |
|---|---|
Use Scenario: Protecting 12V/24V power distribution networks in vehicle body control modules from alternator load dump and inductive switching spikes. IC Role / Device Role: Bidirectional TVS placed between power rail and ground to clamp transients to safe levels for PMICs and microcontrollers. Use Value: Maintains system uptime by preventing reset or brownout events caused by ISO 7637-2 Pulse 5a (load dump) surges up to 1500W. | Use Scenario: Safeguarding RJ45 PHY interface pins in factory automation gateways exposed to ESD and field-wiring induced surges. IC Role / Device Role: Line-to-ground TVS on differential pairs (e.g., ETH_TX+/−) to limit common-mode transients without distorting signal integrity. Use Value: Enables robust 10/100BASE-TX operation in harsh environments by clamping ±15kV contact ESD (IEC 61000-4-2) to <60V. |
| Telecom DC Feeder Protection | Smart Meter Power Input Protection |
Use Scenario: Shielding -48V DC power inputs of remote radio units and base station controllers from lightning-induced surges on outdoor cabling. IC Role / Device Role: Primary surge suppression stage before DC-DC converters and monitoring ICs in telecom infrastructure. Use Value: Withstands repeated 10/1000μs surges up to 26A while maintaining VC ≤59.3V, preserving upstream fuse coordination and converter reliability. | Use Scenario: Securing AC/DC adapter output rails in residential smart meters against grid transients and neutral-ground potential shifts. IC Role / Device Role: Bidirectional clamping device across VDD and GND to prevent MCU lockup or meter calibration drift during surge events. Use Value: Guarantees metrology accuracy and firmware stability by limiting transient overvoltage to <59.3V at full 1500W rating, meeting IEC 61000-4-4 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA (Bourns) | Same DO-214AA package; 600W rating (vs. 1500W); lower IPPM (13.3A) and higher VC (69.4V). | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy ESD and data-line protection. | Select only when board space is constrained and surge energy is below 600W. |
| SMCJ43CA (Littelfuse) | Identical DO-214AB package and 1500W rating; VBR min/max tighter (41.8–44.2V); VC slightly lower (58.1V @ 26.1A). | Drop-in replacement with improved clamping consistency and same automotive qualification scope. | Preferred where tighter VBR tolerance and marginally better clamping are required. |
Compared with 1.5SMC43CA, SMBJ43CA offers smaller footprint but insufficient power handling for automotive load dump, while SMCJ43CA provides identical form-factor and rating with tighter parametric control-making it a validated upgrade path for enhanced surge margin without layout change.
Availability
1.5SMC43CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial Ethernet port hardening, and telecom DC feeder surge suppression requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC43CA 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 Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for industrial and automotive markets.
The 1.5SMCxxCA series was engineered specifically for high-reliability, high-power transient suppression in automotive and industrial environments-emphasizing ISO 7637-2 compliance, MSL Level 1 assembly compatibility, and stable clamping under thermal stress.
FAQ
What is the breakdown voltage range for 1.5SMC43CA?
The 1.5SMC43CA has a guaranteed breakdown voltage range of 40.9V to 45.2V at 1.0mA test current (VBR min/max), measured per ANSI/IEEE C62.35. This symmetric specification applies in both directions due to its bidirectional construction, ensuring predictable clamping onset regardless of transient polarity. The value is confirmed in Taiwan Semiconductor's S2207 datasheet revision.
Is 1.5SMC43CA unidirectional or bidirectional?
1.5SMC43CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It provides identical electrical characteristics-including VBR, VC, and IPPM-in both forward and reverse directions, making it ideal for protecting AC-coupled lines or DC rails where polarity reversal or differential surges may occur. No cathode marking is present on the DO-214AB package.
What is the maximum clamping voltage of 1.5SMC43CA at rated surge current?
The maximum clamping voltage (VC) of 1.5SMC43CA is 59.3V at 26A peak impulse current (IPPM) under the standardized 10/1000μs waveform. This value defines the upper voltage limit imposed on protected circuitry during full-rated surge events and is critical for verifying sufficient margin above the protected IC's absolute maximum ratings. It is specified in the Electrical Specifications table of the official datasheet.
Does 1.5SMC43CA meet automotive surge immunity standards?
Yes, 1.5SMC43CA meets ISO 7637-2 requirements for automotive transient immunity, including Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling and ignition noise). This compliance is explicitly stated in the Features section of Taiwan Semiconductor's S2207 datasheet and validated through standardized surge testing protocols-enabling direct use in automotive ECUs without additional external filtering.
What is the thermal resistance from junction to ambient for 1.5SMC43CA?
The junction-to-ambient thermal resistance (RθJA) of 1.5SMC43CA is 50°C/W under standard JEDEC test conditions (single-layer 1 in² copper pad). This parameter enables accurate junction temperature estimation during repetitive surge events or elevated ambient conditions. When mounted on typical 2-layer PCBs with moderate copper pour, actual RθJA may improve to ~40°C/W, supporting reliable operation up to the rated TJ of +150°C.
1.5SMC43CA 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
1.5SMC43CA FAQ
1.How can I place an order for 1.5SMC43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CA 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 1.5SMC43CA reliable?
The price and inventory of 1.5SMC43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CA?
1.5SMC43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CA 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 1.5SMC43CA?
For technical support, including 1.5SMC43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CA requirements.
6.How does Aetrix verify that 1.5SMC43CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CA 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 1.5SMC43CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CA?
All 1.5SMC43CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CA, 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 1.5SMC43CA part is unused and in its original packaging.
Return procedure for 1.5SMC43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CA Tags
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