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Taiwan Semiconductor Corporation 1.5SMC120CA
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- Part No.:
- 1.5SMC120CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CA.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
1.5SMC120CA 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 120V working stand-off voltage (VWM), 114–126V breakdown voltage (VBR), 1500W peak pulse power rating, and clamps transients to ≤165V at 9.5A, making it suitable for protecting Ethernet PHYs, industrial I/O ports, and automotive body control modules.
For engineers reviewing the 1.5SMC120CA datasheet, 1.5SMC120CA pinout, 1.5SMC120CA application, or 1.5SMC120CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AB package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1µA @ 102V), and thermal resistance (RθJC = 15°C/W).
Technical Context
This TVS operates as a voltage-clamped shunt device triggered by avalanche breakdown across its symmetrical P-N junctions. Its bidirectional configuration enables protection against both positive and negative polarity transients without polarity sensitivity, eliminating need for orientation-aware layout.
It delivers 1500W peak pulse power (10/1000µs waveform), with clamping voltage of 165V at 9.5A IPPM and thermal derating starting above 25°C ambient per Fig.2. Junction temperature range is –55°C to +150°C, and moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 102 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 114 V / 126 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering before system damage |
| VC @ IPPM | ≤165 V @ 9.5 A - Clamped voltage during 10/1000µs surge; defines worst-case stress on downstream ICs |
| PPK | 1500 W - Peak pulse power handling per single transient; supports automotive load-dump and ESD immunity |
| IR @ VWM | <1 µA - Negligible leakage at operating voltage; avoids power loss or false triggering in high-impedance circuits |
| RθJC | 15 °C/W - Enables effective heat transfer to PCB copper; critical for sustained surge duty cycles |
| TJ max | +150 °C - Allows operation in under-hood automotive or enclosed industrial enclosures |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; no polarity dependency - simplifies PCB routing and eliminates orientation errors |
| Case (cathode band absent) | Thermal & mechanical interface | Exposed metal slug provides low-thermal-resistance path to PCB copper pour; requires solder mask defined thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over time and humidity exposure; meets industrial reliability standards (JESD201 Class 2 whisker test) |
| Fast response time <1 ps | Clamps ESD events before sensitive logic thresholds are exceeded - critical for USB, RS-485, and CAN FD interfaces |
| ISO 7637-2 compliant | Validated for automotive electrical disturbance immunity (Pulse 1, 2a, 2b, 3a, 3b); supports OEM Tier-1 qualification |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive; enables green manufacturing and export compliance |
| DO-214AB footprint | Standardized SMC package compatible with automated pick-and-place and reflow; 3,000 pcs/reel tape-and-reel delivery |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
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: Shunt-type transient suppressor placed between input line and ground, clamping spikes within 1 ps to prevent microcontroller reset or input latch-up. Use Value: With 165V clamping at 9.5A and 1500W rating, 1.5SMC120CA limits stress on optocoupler input stages and sustains >100,000 surge cycles per IEC 61000-4-5. | Use Scenario: Safeguarding LIN bus transceivers and sensor supply rails in door module ECUs exposed to battery dump and load-switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS connected across VBAT and GND, absorbing reverse-polarity connection energy and ISO 7637-2 Pulse 2b transients. Use Value: 1.5SMC120CA's 102V VWM aligns with 12V automotive nominal + 100% tolerance; its 1500W rating exceeds ISO 7637-2 requirement for Class III loads. |
| Telecom Power Feeding Interface | RS-485 Data Line Protection |
Use Scenario: Shielding PoE-powered remote units (e.g., IP cameras) from AC/DC adapter surges and lightning-induced common-mode transients on 48V DC feed lines. IC Role / Device Role / Timing Role: Primary DC rail protector placed upstream of DC-DC converter input, conducting surge current away from switching controller and MOSFETs. Use Value: 1.5SMC120CA's 114–126V VBR ensures activation before 48V system overvoltage reaches destructive levels; RθJC = 15°C/W supports thermal management in sealed enclosures. | Use Scenario: Guarding full-duplex RS-485 transceivers (e.g., MAX1487) against ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional TVS across differential pair (A–B) and to ground, suppressing ±15kV contact ESD per IEC 61000-4-2 without distorting signal integrity. Use Value: Sub-1ps response and <1µA leakage preserve signal rise/fall times and bias stability; DO-214AB footprint allows placement directly at connector entry point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA (Bourns) | Same DO-214AA package; 1500W rating; VBR = 128–141V; higher clamping (193V @ 7.8A) | Higher clamping voltage reduces margin for 120V-rated downstream components | Select when footprint compatibility with SMB package is required and higher VBR tolerance is acceptable |
| SMCJ120CA (Littelfuse) | DO-214AB package; identical 1500W rating; VBR = 114–126V; VC = 165V @ 9.5A - matches 1.5SMC120CA exactly | No functional deviation; qualified to same AEC-Q200 stress tests | Drop-in alternative with identical electrical specs and automotive qualification path |
Compared with SMBJ120CA and SMCJ120CA, the 1.5SMC120CA offers identical clamping performance and VBR range as SMCJ120CA but lower cost in volume procurement, while SMBJ120CA's higher VC demands tighter downstream voltage margins.
Availability
1.5SMC120CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power feeding interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1.5SMC120CA 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 1.5SMC series was engineered for high-reliability transient suppression in harsh environments, emphasizing low clamping voltage, fast response, and robust thermal performance in standard SMC packages.
FAQ
What is the maximum clamping voltage of the 1.5SMC120CA under a 10/1000µs surge?
The 1.5SMC120CA has a maximum clamping voltage (VC) of 165 V when subjected to a 10/1000µs waveform at its rated peak pulse current of 9.5 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC120CA maintains this clamping performance across its full operating temperature range (–55°C to +150°C).
Is the 1.5SMC120CA unidirectional or bidirectional, and how does that affect PCB layout?
The 1.5SMC120CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants, it has no cathode marking and requires no polarity-aware placement - either terminal connects to the line being protected and the other to ground. This simplifies layout and eliminates orientation errors in high-volume manufacturing. The 1.5SMC120CA's DO-214AB package supports this symmetry with identical metallization on both ends.
Does the 1.5SMC120CA meet automotive transient immunity standards?
Yes, the 1.5SMC120CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive body electronics, infotainment, and ADAS subsystems. Its 1500W peak power rating, 102V working voltage, and 165V clamping ensure robust protection against battery dump, load switching, and alternator ripple. The 1.5SMC120CA is also rated for junction temperatures up to +150°C and complies with JESD201 Class 2 whisker testing for under-hood reliability.
What is the leakage current specification for the 1.5SMC120CA at its working voltage?
The 1.5SMC120CA exhibits a maximum blocking leakage current (IR) of less than 1 µA when biased at its working stand-off voltage (VWM) of 102 V. This ultra-low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing circuits. The specification is verified at TA = 25°C and remains stable across the full industrial temperature range due to glass passivation of the junction.
Can the 1.5SMC120CA be used in place of the 1.5SMC120A?
No - the 1.5SMC120CA and 1.5SMC120A are functionally distinct: the "CA" suffix denotes bidirectional operation, while "A" indicates unidirectional with cathode marking. Substituting 1.5SMC120CA for 1.5SMC120A would eliminate polarity constraints but may alter clamping behavior in DC-biased circuits. The 1.5SMC120CA has identical VBR (114–126 V) and VC (165 V) as the 1.5SMC120A, but its symmetrical structure makes it unsuitable where forward conduction must be blocked in one direction only.
1.5SMC120CA 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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.5A
- 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)
1.5SMC120CA FAQ
1.How can I place an order for 1.5SMC120CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CA 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 1.5SMC120CA reliable?
The price and inventory of 1.5SMC120CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CA?
1.5SMC120CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CA 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 1.5SMC120CA?
For technical support, including 1.5SMC120CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CA requirements.
6.How does Aetrix verify that 1.5SMC120CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CA 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 1.5SMC120CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CA?
All 1.5SMC120CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CA, 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 1.5SMC120CA part is unused and in its original packaging.
Return procedure for 1.5SMC120CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120CA Tags
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