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Taiwan Semiconductor Corporation 1.5SMC43C
- Part No.:
- 1.5SMC43C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43C.pdf
- Description:
- 1500W, 43V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
1.5SMC43C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 43V breakdown voltage (VBR = 38.7–47.3V), 1500W peak pulse power rating, 61.9V maximum clamping voltage at 25A, and DO-214AB (SMC) package - ideal for telecom front-end interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC43C datasheet, 1.5SMC43C pinout, 1.5SMC43C application, or 1.5SMC43C equivalent, key selection criteria include bidirectional clamping capability, sub-1ps response time, <1μA leakage at 36.8V working stand-off voltage, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and J-STD-020 Level 1 moisture sensitivity.
Technical Context
The 1.5SMC43C implements a glass-passivated silicon avalanche junction optimized for fast transient suppression without degradation under repetitive surges. Its bidirectional configuration enables symmetrical clamping across both polarities, eliminating need for polarity-aware layout in AC-coupled or floating signal paths.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting reliable operation up to TJ = +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for high-reliability surface-mount assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 38.7V / 47.3V - defines guaranteed avalanche conduction onset range at 1mA test current |
| VWM | 36.8V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 61.9V at 25A - peak clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500W - peak pulse power handling per single 1ms waveform, derated above 25°C |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby power loss in battery-backed systems |
| TJ max | +150°C - maximum junction temperature enabling use in under-hood or enclosed industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard 2-pin surface-mount outline with 0.210g mass and matte tin leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002; polarity indicated by band for unidirectional variants - but 1.5SMC43C is bidirectional, so band denotes terminal 1 with no functional polarity distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; symmetric clamping behavior |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; no directional dependency - enables flexible PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating DC rails without polarity constraints |
| Sub-1ps response time | Clamps transients before sensitive ICs experience overvoltage - critical for protecting USB, Ethernet PHYs, and MCU GPIOs |
| ISO 7637-2 compliance | Validated against automotive load-dump and inductive-switching pulses (Pulse 1, 2a, 2b, 3a, 3b), supporting industrial vehicle electronics |
| J-STD-020 Level 1 | Zero floor life limitation - supports standard reflow without baking, reducing manufacturing overhead and moisture-related defects |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives - required for export to EU, Japan, and China markets |
Applications
| Industrial PLC Analog Inputs | Automotive Body Control Module (BCM) I/O |
|---|---|
Use Scenario: Protection of 4–20mA current-loop sensor inputs against field-induced surges and ESD events during installation or maintenance. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±1kV ESD (IEC 61000-4-2) and ±50V load dump transients. Use Value: Prevents damage to precision op-amps and ADC front-ends while maintaining signal integrity below 36.8V operating range. |
Use Scenario: Safeguarding LIN bus transceivers and switch inputs exposed to battery transients in door modules and lighting controls. IC Role / Device Role / Timing Role: Primary surge suppression device meeting ISO 7637-2 Pulse 2a (battery disconnect) and Pulse 3b (capacitive discharge). Use Value: Limits clamped voltage to 61.9V, well below 65V absolute maximum ratings of common LIN transceivers like TJA1020. |
| Telecom DSL Line Interface | Consumer Audio Equipment DC Power Rails |
Use Scenario: Transient protection on POTS line interface circuits subject to lightning-induced surges and tip/ring polarity reversals. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between transformer secondary and codec IC, rated for 1500W 10/1000μs pulses. Use Value: Maintains symmetry across tip/ring lines without discrete diode pairs - reduces BOM count and layout area by 50% vs. unidirectional solutions. |
Use Scenario: Input rail protection for Class D audio amplifiers powered from 48V wall adapters prone to switching noise and hot-plug spikes. IC Role / Device Role / Timing Role: Standoff voltage (36.8V) exceeds nominal 48V supply derated for ripple, ensuring no conduction during normal operation. Use Value: Clamps 100V+ transients to ≤62V within 1ps, preventing latch-up or gate oxide rupture in MOSFET output stages. |
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 (SMB) package; lower PPK = 600W; VC = 69.4V @ 8.7A | Lower surge capacity suits consumer-grade 12–24V systems, not automotive or telecom primary protection | Select when board space allows SMB footprint and peak surge energy is ≤600W |
| SMCJ43CA (Littelfuse) | Identical DO-214AB (SMC) package; same 1500W rating; VC = 64.5V @ 23.3A - 4% higher clamping than 1.5SMC43C | Marginally higher clamping may impact margin-sensitive 3.3V/5V logic protection cascades | Prefer when cross-supply sourcing from Littelfuse is required; verify system-level clamping margin |
Compared with SMBJ43CA and SMCJ43CA, the 1.5SMC43C offers the lowest clamping voltage (61.9V) in the DO-214AB form factor and tighter VBR tolerance (±10% vs. ±5% for SMCJ43CA), making it optimal for designs where downstream voltage margin is constrained.
Availability
1.5SMC43C is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive BCM I/O protection, and telecom DSL line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC43C 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park with global distribution.
The 1.5SMCxxC series was engineered specifically for high-energy bidirectional surge suppression in automotive, industrial, and telecom infrastructure - emphasizing reliability under ISO 7637-2 and JEDEC moisture stress conditions.
FAQ
What does the 'C' suffix indicate in 1.5SMC43C?
The 'C' suffix in 1.5SMC43C denotes bidirectional configuration - meaning the device provides symmetrical transient voltage clamping for both positive and negative polarity surges. Unlike unidirectional variants (e.g., 1.5SMC43), the 1.5SMC43C has no anode/cathode distinction and functions identically regardless of voltage polarity applied across its terminals.
Is 1.5SMC43C compliant with automotive surge standards?
Yes, 1.5SMC43C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (battery line disconnection), Pulse 2b (supply line interruption), and Pulses 3a/3b (capacitive discharge). Its 1500W peak power rating and 61.9V clamping voltage make it suitable for protecting body control modules, infotainment interfaces, and LIN/CAN physical layers in passenger vehicles.
What is the maximum working stand-off voltage (VWM) for 1.5SMC43C?
The maximum working stand-off voltage (VWM) for 1.5SMC43C is 36.8V - the highest DC or continuous AC voltage that can be applied without triggering significant avalanche conduction. This value ensures compatibility with 36V nominal systems (e.g., 48V telecom supplies derated for ripple) while maintaining <1μA leakage current.
Does 1.5SMC43C require special handling for moisture sensitivity?
No - 1.5SMC43C is rated J-STD-020 Level 1, meaning it has unlimited floor life and may be processed using standard SMT reflow profiles without pre-baking. This eliminates moisture-related popcorning risk and simplifies manufacturing for high-volume industrial and automotive production lines.
How does the clamping voltage of 1.5SMC43C compare to similar 43V TVS diodes?
1.5SMC43C achieves a maximum clamping voltage (VC) of 61.9V at 25A (10/1000μs waveform), which is among the lowest in its class. For comparison, SMCJ43CA clamps at 64.5V and P4SMA43C at 70.1V - making 1.5SMC43C preferable when protecting 65V-tolerant ICs with minimal voltage margin.
1.5SMC43C 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 25A
- 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)
1.5SMC43C FAQ
1.How can I place an order for 1.5SMC43C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43C 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 1.5SMC43C reliable?
The price and inventory of 1.5SMC43C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43C is usually 5 days.
3.What payment methods are accepted for 1.5SMC43C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43C?
1.5SMC43C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43C 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 1.5SMC43C?
For technical support, including 1.5SMC43C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43C requirements.
6.How does Aetrix verify that 1.5SMC43C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43C 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 1.5SMC43C meets industry standards.
7.What is the process for return or replacement of 1.5SMC43C?
All 1.5SMC43C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43C, 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 1.5SMC43C part is unused and in its original packaging.
Return procedure for 1.5SMC43C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43C Tags
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Toshiba Semiconductor and Storage
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