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Taiwan Semiconductor Corporation 1.5SMC120C
- Part No.:
- 1.5SMC120C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120C.pdf
- Description:
- 1500W, 120V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,024
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Product details
Overview
1.5SMC120C 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 delivers 1500W peak pulse power, 108–132V breakdown voltage (VBR), 97.2V working stand-off voltage (VWM), and clamps to ≤173V at 9.1A peak impulse current - deployed in telecom line cards, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC120C datasheet, 1.5SMC120C pinout, 1.5SMC120C application, or 1.5SMC120C equivalent, key selection criteria include unidirectional/bidirectional configuration (C = bidirectional), DO-214AB package thermal performance (RθJA = 50°C/W), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and sub-1ps response time under transient stress.
Technical Context
The 1.5SMC120C implements a glass-passivated silicon junction optimized for fast clamping of ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical suppression across both polarities without external polarity management, supporting robust protection in AC-coupled or floating signal paths.
It operates within –55°C to +150°C junction temperature range, with 1μA max leakage at 97.2V and 0.107%/°C VBR temperature coefficient - enabling stable clamping performance across automotive and industrial ambient conditions while maintaining UL 94V-0 flammability rating in the DO-214AB molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 108 V / 132 V - ensures reliable conduction onset above normal operating voltage in bidirectional mode |
| VWM | 97.2 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1 μA |
| VC @ IPPM | ≤173 V at 9.1 A - defines worst-case clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500 W - peak pulse power handling per single 10/1000μs waveform, derated linearly above 25°C ambient |
| IPPM | 9.1 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood or enclosed industrial environments |
| RθJA | 50 °C/W - thermal resistance from junction to ambient, guiding PCB copper area and airflow requirements |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, J-STD-002 solderable, JESD 201 Class 2 whisker compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | No polarity marking; either terminal serves as input/output for transient energy in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress |
| Sub-1 ps response time | Clamps ESD events before sensitive ICs experience overstress, meeting IEC 61000-4-2 Level 4 |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| UL 94V-0 molding | Self-extinguishing encapsulant prevents flame propagation in fault conditions |
Applications
| Telecom Line Interface Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting RS-485 transceivers and Ethernet PHYs against induced surges on outdoor or factory-floor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed differential-mode across signal pair, absorbing common-mode and differential-mode transients. Use Value: Limits clamped voltage to ≤173V, keeping transceiver inputs within absolute maximum ratings during 1kV/2kV surge tests. | Use Scenario: Safeguarding 24V DC digital input channels in programmable logic controllers exposed to relay coil kickback and motor noise. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminal and ground, shunting inductive spikes before reaching optocoupler or microcontroller GPIO. Use Value: Withstands 1500W pulses and maintains <1μA leakage at 97.2V, ensuring no false triggering during normal 24V operation. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Protecting LIN bus nodes and sensor inputs in door modules and lighting controllers subjected to battery load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS on LIN data line and supply rail, compliant with ISO 7637-2 Pulse 2b (load dump) and Pulse 5a (alternator switching). Use Value: Clamps to ≤173V within nanoseconds, preventing latch-up or damage to LIN transceivers rated for 40V absolute max. | Use Scenario: Shielding microcontroller-based motor control boards in washing machines and HVAC blowers from commutation spikes and ESD during service access. IC Role / Device Role / Timing Role: TVS placed across H-bridge supply rails and gate driver outputs to absorb MOSFET turn-off energy and user-touch ESD. Use Value: 1500W rating handles repetitive 10/1000μs surges from brushed motor arcing; DO-214AB package supports automated SMT assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA (Bourns) | Same DO-214AA package, 1500W rating, VBR = 133–147V, VC = 193V @ 7.8A - higher clamping voltage, lower surge current | Less effective clamping margin for 120V nominal systems; requires layout review for thermal dissipation due to smaller SMB package | Select when footprint compatibility with SMBJ series is required and system can tolerate higher clamped voltage |
| SMCJ120CA (Littelfuse) | DO-214AB package identical to 1.5SMC120C, VBR = 133–147V, VC = 193V @ 7.8A - same footprint but tighter VBR tolerance (5%) vs. Taiwan Semi's 10% | Higher clamping voltage reduces protection margin; not drop-in electrically despite identical package | Prefer only if sourcing constraints require Littelfuse and design margin allows 20V higher clamping |
Compared with SMBJ120CA and SMCJ120CA, the 1.5SMC120C offers lower clamping voltage (173V vs. ≥193V) and tighter VBR spread (108–132V vs. 133–147V), delivering superior protection headroom for 120V-class systems without requiring PCB rework.
Availability
1.5SMC120C is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive electronics requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5SMC120C 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 devices since 1979.
The 1.5SMCxxC series belongs to TSC's high-power surface-mount TVS platform, engineered specifically for automotive-grade transient immunity (ISO 7637-2), industrial ESD robustness (IEC 61000-4-2), and automated manufacturing compatibility.
FAQ
What does the 'C' suffix indicate in 1.5SMC120C?
The 'C' suffix in 1.5SMC120C denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions without polarity dependence. Unlike unidirectional variants (e.g., 1.5SMC120A), the 1.5SMC120C has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal paths where polarity is undefined.
What is the maximum clamping voltage of 1.5SMC120C under standard test conditions?
The maximum clamping voltage (VC) of 1.5SMC120C is 173 V, measured at a peak impulse current (IPPM) of 9.1 A using the 10/1000μs double-exponential waveform defined in Fig.5 of the datasheet. This value represents the worst-case voltage seen across the 1.5SMC120C during surge conduction and directly determines the protection margin for downstream circuitry.
Is 1.5SMC120C compliant with automotive transient standards?
Yes, 1.5SMC120C meets ISO 7637-2 requirements for automotive electrical disturbances, including Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a/3b (switching noise), and Pulse 5a (load dump). Its 1500W peak power rating and 173V clamping ensure robust immunity in body control modules, infotainment interfaces, and LIN/CAN node protection circuits.
How does the thermal performance of 1.5SMC120C affect PCB layout?
The 1.5SMC120C has a junction-to-ambient thermal resistance (RθJA) of 50°C/W, meaning each watt of sustained power dissipation raises the junction temperature by 50°C above ambient. For reliable operation near its 150°C maximum junction limit, PCB layout must provide adequate copper area (≥100 mm² per pad) and minimize thermal isolation - especially critical during repetitive surge events or elevated ambient temperatures in enclosed enclosures.
What is the leakage current specification for 1.5SMC120C at its working voltage?
At its working stand-off voltage (VWM) of 97.2 V, the 1.5SMC120C exhibits a maximum blocking leakage current (IR) of 1 μA at 25°C ambient temperature. This ultra-low leakage ensures minimal power loss and no interference with upstream voltage regulation or sensing circuits - critical for battery-powered or high-impedance signal chain applications where standby current must be tightly controlled.
1.5SMC120C 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):
- 97.2V
- Voltage - Breakdown (Min):
- 108V
- Voltage - Clamping (Max) @ Ipp:
- 173V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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)
1.5SMC120C FAQ
1.How can I place an order for 1.5SMC120C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120C 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 1.5SMC120C reliable?
The price and inventory of 1.5SMC120C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120C is usually 5 days.
3.What payment methods are accepted for 1.5SMC120C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120C?
1.5SMC120C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120C 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 1.5SMC120C?
For technical support, including 1.5SMC120C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120C requirements.
6.How does Aetrix verify that 1.5SMC120C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120C 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 1.5SMC120C meets industry standards.
7.What is the process for return or replacement of 1.5SMC120C?
All 1.5SMC120C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120C, 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 1.5SMC120C part is unused and in its original packaging.
Return procedure for 1.5SMC120C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120C Tags
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