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Taiwan Semiconductor Corporation 1.5SMC22CA
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- Part No.:
- 1.5SMC22CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CA.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
1.5SMC22CA 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 22V breakdown voltage (min 19.8V, max 24.2V), 1500W peak pulse power rating, 30.6V maximum clamping voltage at 51A, and DO-214AB (SMC) package. It is used to protect Ethernet PHYs, USB ports, and industrial I/O circuits against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC22CA datasheet, 1.5SMC22CA pinout, 1.5SMC22CA application, or 1.5SMC22CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1µA @ 18.8V), fast sub-1ps response, ISO 7637-2 compliance, and thermal performance with RθJA = 50°C/W.
Technical Context
The 1.5SMC22CA operates as a bipolar avalanche diode, symmetrically clamping voltage surges in both polarities without requiring polarity awareness in layout. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.092%/°C), enabling predictable clamping across -55°C to +150°C ambient.
It delivers 1500W peak pulse power per the 10/1000µs waveform (IEC 61000-4-5), with 30.6V clamping at 51A IPPM and <1µA blocking leakage at its 18.8V working stand-off voltage - critical for low-power sensor interfaces where quiescent current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.8V / 24.2V - defines guaranteed avalanche conduction onset range under 1mA test current; ensures robust margin above 18.8V operating voltage |
| VWM | 18.8V - maximum continuous reverse voltage before significant leakage; sets safe DC bias limit for protected line |
| VC @ IPPM | 30.6V @ 51A - clamped voltage during 10/1000µs surge; determines maximum stress on downstream ICs |
| PPK | 1500W - peak pulse power handling per IEC 61000-4-5; supports Level 4 lightning surge immunity |
| IR @ VWM | <1µA - ultra-low leakage at stand-off voltage; avoids loading of high-impedance sensor or reference circuits |
| TJ max | +150°C - maximum junction temperature; enables operation in enclosed industrial enclosures without derating |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained surge duty |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional avalanche junction | Identical terminal behavior in both directions; no polarity marking required; simplifies layout and eliminates orientation errors |
| Case | Thermal path / mechanical anchor | DO-214AB body provides primary heat dissipation path to PCB copper; requires minimum 25 mm² thermal pad for full 1500W rating |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines (e.g., RS-485, CAN, audio) without external polarity management |
| Sub-1ps response time | Clamps ESD events (IEC 61000-4-2 ±8kV contact) before sensitive logic can be damaged |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Validated for automotive load-dump and inductive switching transients without additional filtering |
| UL 94V-0 molding compound | Prevents flame propagation in safety-critical industrial control cabinets and power supplies |
| Halogen-free (IEC 61249-2-21) | Meets environmental compliance for export to EU, Japan, and China without material declaration overhead |
Applications
| Industrial I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24V PLC analog input channels from field-wiring transients and ground-loop spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp common-mode surges before signal conditioning amplifier. Use Value: Limits voltage to ≤30.6V during 1kV/500A surge, preserving 16-bit ADC accuracy and preventing op-amp latch-up. | Use Scenario: Safeguarding LIN bus transceivers in door module ECUs against battery disconnect spikes and alternator load dump. IC Role / Device Role / Timing Role: Standoff protection device on LIN data line, operating continuously at 12V with <1µA leakage. Use Value: Survives ISO 7637-2 Pulse 5a (load dump up to 60V/100ms) while maintaining <100nA standby current budget. |
| USB 2.0 Data Line Protection | Telecom DSL Line Interface |
Use Scenario: ESD protection for D+ and D− pins of USB 2.0 upstream ports in set-top boxes and network gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at USB connector, minimizing stub length. Use Value: Clamps ±15kV IEC 61000-4-2 ESD strikes to <30.6V within <1ps, preventing PHY damage without degrading 480Mbps eye diagram. | Use Scenario: Primary surge protection for ADSL/VDSL line interface transformers exposed to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: First-stage protector across transformer secondary, shunting >1kA surges before secondary-side isolation barrier. Use Value: Handles 10/1000µs surges up to 1500W while maintaining <1µA leakage at 18.8V, avoiding transformer core saturation during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA (Bourns) | Same DO-214AA (SMB) package; 600W rating; 33.2V clamping at 18.5A | Lower power handling limits use to sub-1kV surge environments; smaller footprint but higher thermal resistance | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 |
| SMCJ22CA (Littelfuse) | Identical DO-214AB (SMC) package; 1500W rating; 33.2V clamping at 45.3A | Higher clamping voltage increases stress on protected ICs; same thermal profile and mounting | Choose only if supply chain mandates Littelfuse sourcing; verify downstream IC VDSM margin against 33.2V vs. 30.6V |
Compared with SMBJ22CA and SMCJ22CA, the 1.5SMC22CA offers the lowest clamping voltage (30.6V) among SMC-packaged 22V bidirectional TVS diodes, delivering superior protection margin for 3.3V/5V logic interfaces while maintaining full 1500W surge capability and identical PCB footprint.
Availability
1.5SMC22CA is available at Aetrix Electronics and suitable for industrial I/O modules, automotive body electronics, and telecom line card designs requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for 1.5SMC22CA 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The 1.5SMCxxCA series targets high-reliability surge protection in automotive, industrial, and telecom infrastructure, emphasizing low clamping voltage, tight VBR tolerance, and AEC-Q200 readiness through rigorous qualification testing.
FAQ
What is the breakdown voltage range for the 1.5SMC22CA?
The 1.5SMC22CA has a guaranteed breakdown voltage range of 19.8V to 24.2V at 1mA test current (VBR min/max), measured per ANSI/IEEE C62.35. This 5% tolerance ensures consistent clamping onset across production lots and temperature extremes from –55°C to +150°C, making it suitable for precision protection in regulated power rails.
Is the 1.5SMC22CA unidirectional or bidirectional?
The 1.5SMC22CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities with identical VBR, VC, and leakage characteristics - eliminating the need for polarity-aware placement and enabling protection of AC-coupled or floating signal lines such as RS-485, CAN, or audio interfaces.
What is the maximum clamping voltage of the 1.5SMC22CA during a surge event?
The 1.5SMC22CA clamps to a maximum of 30.6V at 51A peak pulse current (IPPM) under the standard 10/1000µs waveform. This value is measured per IEC 61000-4-5 and represents the highest voltage imposed on the protected circuit during worst-case surge conditions, directly determining compatibility with downstream IC absolute maximum ratings.
Does the 1.5SMC22CA meet automotive surge immunity standards?
Yes, the 1.5SMC22CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical disturbances. Its 1500W peak power rating and low clamping voltage enable robust protection against load-dump, inductive switching, and battery reversal transients commonly encountered in body control modules and infotainment systems.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC22CA?
The 1.5SMC22CA has a junction-to-ambient thermal resistance (RθJA) of 50°C/W. To sustain repeated 1500W surges without exceeding +150°C junction temperature, the PCB must provide ≥25 mm² of 2-oz copper connected to both terminals. Reducing copper area increases thermal impedance and risks permanent degradation after fewer surge events.
1.5SMC22CA 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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)
1.5SMC22CA FAQ
1.How can I place an order for 1.5SMC22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CA 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 1.5SMC22CA reliable?
The price and inventory of 1.5SMC22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CA?
1.5SMC22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CA 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 1.5SMC22CA?
For technical support, including 1.5SMC22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CA requirements.
6.How does Aetrix verify that 1.5SMC22CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CA 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 1.5SMC22CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CA?
All 1.5SMC22CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CA, 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 1.5SMC22CA part is unused and in its original packaging.
Return procedure for 1.5SMC22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22CA Tags
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