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Taiwan Semiconductor Corporation 1.5SMC20CA
- Part No.:
- 1.5SMC20CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CA.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
1.5SMC20CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 19.0–21.0 V at 1 mA test current, working stand-off voltage 17.1 V, clamping voltage 27.7 V at 56 A peak pulse current, and junction temperature range −55 °C to +150 °C. It protects telecom line interfaces against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC20CA datasheet, 1.5SMC20CA pinout, 1.5SMC20CA application, or 1.5SMC20CA equivalent, key selection criteria include bidirectional clamping capability, sub-1 ps response time, <1 µA leakage at 17.1 V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AB thermal performance (RθJC = 15 °C/W).
Technical Context
The 1.5SMC20CA uses a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal paths. Its clamping behavior is defined by a sharp avalanche breakdown with temperature coefficient of 0.090 %/°C and maintains stable VC ≤ 27.7 V under 10/1000 µs waveform at 56 A.
Designed for surface-mount automation, it meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance. Polarity is marked by cathode band; for bidirectional use, no polarity orientation is required in circuit layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 19.0 V / 21.0 V at IT = 1 mA - defines minimum and maximum guaranteed avalanche onset across production lot |
| VWM | 17.1 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| IR @ VWM | <1 µA - ensures negligible standby power loss and signal integrity in high-impedance lines |
| VC @ IPPM | 27.7 V at 56 A (10/1000 µs) - peak clamped voltage seen by protected IC during worst-case surge |
| PPK | 1500 W - peak pulse power handling per single transient event, derated above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature enabling operation in industrial and automotive under-hood environments |
| RθJC | 15 °C/W - low thermal resistance from junction to case supports effective PCB copper pour heat sinking |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band marking not functional for this CA variant; terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage events |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Electrically identical to Terminal 1; no polarity dependency in CA configuration |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable long-term leakage performance and resistance to humidity-induced degradation |
| Response time <1.0 ps | Clamps transients before sensitive downstream logic or analog circuitry sustains damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU directives for environmentally constrained electronics manufacturing |
| Matte tin-plated leads | Enables reliable solder wetting and compatibility with lead-free reflow profiles per J-STD-002 |
Applications
| Telecom Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting RS-485 transceivers on outdoor base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential pair, shunting surge energy to ground before transceiver input stages. Use Value: Limits voltage excursion to ≤27.7 V during 56 A 10/1000 µs surge, preserving transceiver integrity per IEC 61000-4-5 Level 4. | Use Scenario: Safeguarding 4–20 mA current-loop sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Parallel-connected TVS across loop terminals to absorb switching transients from solenoid actuation or relay bounce. Use Value: Maintains loop accuracy with <1 µA leakage at 17.1 V, preventing offset errors while surviving repeated 1500 W pulses. |
| Automotive Body Control Module | Consumer USB Port ESD Protection |
Use Scenario: Input protection for LIN bus nodes in door module ECUs subjected to battery dump and load-switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS on LIN signal line referenced to chassis ground, meeting ISO 7637-2 Pulse 2b immunity. Use Value: Clamps transients within 1 ps to prevent latch-up in LIN transceivers, with thermal design supported by RθJC = 15 °C/W. | Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer-based TVS in portable media players. IC Role / Device Role / Timing Role: Fast-response silicon TVS providing sub-28 V clamping to protect USB PHY I/O pins during ±8 kV contact discharge. Use Value: Achieves <1 µA leakage at 17.1 V to avoid signal attenuation, while delivering 1500 W peak power handling beyond IEC 61000-4-2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA (Bourns) | Same DO-214AA package, 1000 W rating, VC = 32.4 V @ 31 A - lower peak power, higher clamping voltage | Less robust for high-energy automotive load-dump events; suitable for consumer-grade ESD-only scenarios | Select 1.5SMC20CA when 1500 W surge handling and 27.7 V clamping are required; SMBJ20CA fits tighter board space but sacrifices energy capacity |
| SMCJ20CA (Littelfuse) | Identical DO-214AB package, 1500 W rating, VC = 27.7 V @ 56 A - functionally aligned with 1.5SMC20CA | No application difference; validated for same ISO 7637-2 and IEC 61000-4-5 use cases | SMCJ20CA is a direct functional alternative with matching electrical specs and thermal performance; verify marking and tape/reel packaging compatibility for production line integration |
Compared with SMBJ20CA and SMCJ20CA, the 1.5SMC20CA delivers identical clamping performance to SMCJ20CA but in a cost-optimized Taiwan Semiconductor process, while offering superior surge energy handling versus SMBJ20CA's 1000 W limit-critical for industrial and automotive front-end protection where pulse repetition and amplitude vary.
Availability
1.5SMC20CA is available at Aetrix Electronics and suitable for telecom line protection, industrial sensor interface, automotive body control modules, and consumer USB port ESD protection requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC20CA 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 for industrial, automotive, and consumer markets.
The 1.5SMCxxCA series is part of TSC's high-power surface-mount TVS platform designed specifically for robust transient immunity in harsh electromagnetic environments-emphasizing low clamping voltage, fast response, and AEC-Q200-aligned reliability.
FAQ
What is the breakdown voltage tolerance for 1.5SMC20CA?
The 1.5SMC20CA has a guaranteed breakdown voltage range of 19.0 V to 21.0 V at 1 mA test current, measured per ANSI/IEEE C62.35. This ±5% tolerance ensures predictable clamping onset across all units and supports reliable system-level surge margin calculations without derating overhead.
Is 1.5SMC20CA unidirectional or bidirectional?
The "CA" suffix in 1.5SMC20CA explicitly denotes bidirectional configuration. Unlike "C" variants, the CA version provides symmetrical clamping in both polarities-no cathode/anode orientation is required during placement, simplifying layout for AC-coupled or differential signal lines.
What is the maximum clamping voltage of 1.5SMC20CA under standard surge conditions?
The 1.5SMC20CA clamps to a maximum of 27.7 V when subjected to a 10/1000 µs waveform with peak current of 56 A. This value is specified in the Electrical Specifications table and verified per Fig.5 waveform definition, ensuring consistent overvoltage limiting for protected ICs.
Does 1.5SMC20CA meet automotive transient immunity standards?
Yes, the 1.5SMC20CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements-covering typical automotive transients including load dump, alternator ripple, and inductive switching noise. Its 1500 W rating and low RθJC support sustained operation in under-hood temperature environments.
What is the thermal resistance from junction to case for 1.5SMC20CA?
The junction-to-case thermal resistance (RθJC) of 1.5SMC20CA is 15 °C/W, measured per JEDEC standards. This enables efficient heat transfer to the PCB copper pour or heatsink, supporting reliable operation at full 1500 W peak power in short-duration surge events without exceeding +150 °C junction temperature.
1.5SMC20CA 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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)
1.5SMC20CA FAQ
1.How can I place an order for 1.5SMC20CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CA 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 1.5SMC20CA reliable?
The price and inventory of 1.5SMC20CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CA?
1.5SMC20CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CA 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 1.5SMC20CA?
For technical support, including 1.5SMC20CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CA requirements.
6.How does Aetrix verify that 1.5SMC20CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CA 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 1.5SMC20CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CA?
All 1.5SMC20CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CA, 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 1.5SMC20CA part is unused and in its original packaging.
Return procedure for 1.5SMC20CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20CA Tags
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