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Taiwan Semiconductor Corporation 1.5SMC12CA
- Part No.:
- 1.5SMC12CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12CA.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,779
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Product details
Overview
1.5SMC12CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 12V working stand-off voltage (VWM), 11.4–12.6V breakdown voltage (VBR), 16.7V maximum clamping voltage (VC) at 94A peak pulse current, and 1500W peak pulse power rating per 10/1000μs waveform.
For engineers reviewing the 1.5SMC12CA datasheet, 1.5SMC12CA pinout, 1.5SMC12CA application, or 1.5SMC12CA equivalent, this device is selected for ESD and lightning-induced transient suppression in telecom interfaces, industrial I/O ports, and automotive body electronics where bidirectional clamping and DO-214AB package compatibility are required.
Technical Context
The 1.5SMC12CA operates as a bipolar avalanche diode with symmetrical forward and reverse clamping characteristics, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1μA at 10.2V).
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained operation up to TJ = 150°C. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive-switching immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR min/max | 11.4 V / 12.6 V - Breakdown occurs within this range at 1mA test current; defines turn-on threshold |
| VC @ IPPM | 16.7 V at 94 A - Clamped voltage during 10/1000μs surge; limits downstream component stress |
| PPK | 1500 W - Peak pulse power handling per single transient event (1ms duration) |
| IR @ VWM | <1 μA - Minimal leakage at rated stand-off voltage; preserves signal integrity and power efficiency |
| Package | DO-214AB (SMC) - Standard surface-mount outline with 7.11 × 6.22 mm footprint and matte tin leads |
| Polarity | Bidirectional - Cathode band absent; identical clamping in both directions |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with no polarity marking. Case material meets UL 94V-0; terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage above |VWM| in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables clamping before transient energy couples into protected circuitry |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b - Validated for automotive electrical system transients including load dump and inductive switching |
| Moisture sensitivity | Level 1 (J-STD-020) - No dry-pack or bake requirement prior to reflow |
| RoHS & halogen-free | Compliant per IEC 61249-2-21 - Supports environmentally regulated industrial and consumer product designs |
| Automated placement ready | DO-214AB tape-and-reel (3000/reel) - Compatible with standard SMT pick-and-place equipment |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 12V CAN bus and LIN signal lines from load-dump spikes and ESD events in harsh vehicle environments. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential pair or supply rail to limit transient overvoltage. Use Value: Limits clamping voltage to 16.7V during 94A surges, preventing damage to transceivers rated for ≤27V absolute maximum. |
Use Scenario: Safeguarding microcontroller GPIOs and sensor inputs connected to external switches or actuators subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff protector on 5V/12V power domains and analog input channels. Use Value: Sub-1μA leakage at 10.2V ensures minimal impact on precision sensing and battery-powered sleep modes. |
| Telecom Ethernet Port Surge Suppression | Consumer Appliance Motor Drive Interface |
Use Scenario: Secondary-level surge protection on PoE-powered Ethernet PHY interfaces exposed to lightning-induced surges via cabling. IC Role / Device Role / Timing Role: Fast-acting shunt element placed after primary gas discharge tube (GDT) to handle residual fast-rising transients. Use Value: 1500W peak power rating absorbs IEEE C62.41 Cat. A/B surge energy without degradation after single-event exposure. |
Use Scenario: Protecting MCU-based motor control boards from back-EMF generated by brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Clamp across motor coil terminals or H-bridge supply rails to divert inductive energy. Use Value: Symmetrical clamping ensures equal protection during forward/reverse motor commutation without polarity-dependent layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA (Bourns) | Same DO-214AA package; 1500W rating; VBR = 12.2–13.5V; VC = 19.9V @ 75.5A | Higher clamping voltage reduces margin for 12V rail protection; lower IPPM | Select when footprint compatibility with SMB package is prioritized over clamping tightness |
| SMCJ12CA (Littelfuse) | Same DO-214AB package; 1500W rating; VBR = 12.2–13.5V; VC = 19.9V @ 75.5A | Identical thermal specs but higher VC increases risk of downstream overvoltage in 12V systems | Prefer only if second-source qualification requires Littelfuse's AEC-Q200-qualified variants |
Compared with 1.5SMC12CA, SMBJ12CA and SMCJ12CA offer equivalent surge power but higher clamping voltages (19.9V vs. 16.7V), reducing design margin for 12V systems; the 1.5SMC12CA's tighter VBR tolerance and lower VC make it preferable for space-constrained, low-voltage rail protection where clamping headroom is critical.
Availability
1.5SMC12CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive BCM interfaces, and telecom Ethernet port surge suppression requiring stable component supply and full traceability.
Supply support for 1.5SMC12CA 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 1.5SMC series was developed to deliver high-power, surface-mount transient suppression in compact DO-214AB packages for automotive and industrial applications demanding ISO 7637-2 compliance and AEC-Q200 readiness.
FAQ
What is the clamping voltage of the 1.5SMC12CA under a 10/1000μs surge?
The 1.5SMC12CA has a maximum clamping voltage (VC) of 16.7 V at 94 A peak pulse current (IPPM), measured per the 10/1000μs waveform defined in IEC 61000-4-5 and ISO 7637-2. This value ensures reliable protection of 12V-rated ICs and interfaces without exceeding their absolute maximum ratings.
Is the 1.5SMC12CA unidirectional or bidirectional?
The 1.5SMC12CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities with identical VBR, VC, and IPPM specifications in forward and reverse directions-no cathode band marking is present on the DO-214AB package.
Does the 1.5SMC12CA meet automotive transient immunity standards?
Yes, the 1.5SMC12CA meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), making it suitable for use in automotive body electronics, infotainment, and powertrain subsystems where robust EMC performance is mandated.
What is the maximum operating junction temperature for the 1.5SMC12CA?
The 1.5SMC12CA has a maximum junction temperature (TJ) rating of +150°C and a storage temperature range of −55°C to +150°C. Its RθJA of 50°C/W allows thermal design for continuous operation in ambient temperatures up to +100°C when mounted on standard 1-oz copper PCBs.
How does the 1.5SMC12CA differ from the 1.5SMC12A?
The 1.5SMC12A is unidirectional (cathode-banded), while the 1.5SMC12CA is bidirectional (no polarity marking). Both share identical VBR (11.4–12.6V), VC (16.7V), and PPK (1500W), but the CA version enables AC-coupled or floating-line protection without orientation constraints during assembly.
1.5SMC12CA 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 94A
- 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)
1.5SMC12CA FAQ
1.How can I place an order for 1.5SMC12CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12CA 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 1.5SMC12CA reliable?
The price and inventory of 1.5SMC12CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC12CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12CA?
1.5SMC12CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12CA 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 1.5SMC12CA?
For technical support, including 1.5SMC12CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12CA requirements.
6.How does Aetrix verify that 1.5SMC12CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12CA 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 1.5SMC12CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC12CA?
All 1.5SMC12CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12CA, 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 1.5SMC12CA part is unused and in its original packaging.
Return procedure for 1.5SMC12CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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