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Taiwan Semiconductor Corporation 1.5SMC47CA
- Part No.:
- 1.5SMC47CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CA.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,732
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Product details
Overview
1.5SMC47CA 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 47V breakdown voltage (min 44.7V, max 49.4V), 1500W peak pulse power rating, 64.8V maximum clamping voltage at 24A, and DO-214AB (SMC) package. It protects telecom power supplies against lightning-induced transients per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the 1.5SMC47CA datasheet, 1.5SMC47CA pinout, 1.5SMC47CA application, or 1.5SMC47CA equivalent, key selection criteria include bidirectional clamping capability, sub-1ps response time, <1µA leakage at 40.2V, compliance with automotive transient standards, and thermal resistance (RθJA = 50°C/W) for board-level thermal design.
Technical Context
The 1.5SMC47CA operates as a symmetric bipolar junction device-clamping equally in both forward and reverse directions-enabling single-device protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated chip junction ensures stable VBR temperature coefficient (0.101%/°C) and low leakage (<1µA at VWM = 40.2V).
It delivers 1500W peak pulse power (10/1000µs waveform) with 64.8V clamping at 24A impulse current, supporting robust immunity to ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and surge (IEC 61000-4-5) events. Junction-to-ambient thermal resistance of 50°C/W enables reliable operation up to +150°C ambient when mounted on standard FR-4 PCBs with adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7V / 49.4V - defines precise voltage threshold where avalanche conduction begins under 1mA test current |
| VWM | 40.2V - maximum continuous working voltage before significant leakage; sets safe operating margin below breakdown |
| VC@IPPM | 64.8V @ 24A - clamping voltage during 10/1000µs surge; determines protected circuit's peak overvoltage exposure |
| PPK | 1500W - peak pulse power handling (1ms duration); defines survivability against high-energy transients |
| IR@VWM | <1µA - ultra-low blocking leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - maximum junction temperature; supports operation in under-hood automotive or industrial enclosures |
| RθJA | 50°C/W - thermal resistance from junction to ambient; guides PCB copper pour sizing for thermal management |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetric construction). Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche terminals | No polarity marking required; either terminal serves as input or return path for transient energy diversion |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Sub-1ps response time | Clamps transients before sensitive downstream ICs experience damaging overvoltage |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates moisture-related popcorning risk |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications |
Applications
| Automotive Power Line Protection | Industrial Ethernet PHY Interface |
|---|---|
Use Scenario: Protecting 12V/24V vehicle infotainment power rails from alternator load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS shunt that clamps surges to ≤64.8V while diverting up to 24A away from PMICs and microcontrollers. Use Value: Eliminates need for separate forward/reverse protection devices; maintains system uptime during harsh electrical environments per ISO 7637-2. | Use Scenario: Safeguarding RJ45 magnetics and PHY transceivers in factory-floor Ethernet switches exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100pF at 0V) bidirectional clamp placed across differential pairs to limit common-mode overvoltage. Use Value: Prevents PHY latch-up or damage without degrading 100BASE-TX signal integrity due to symmetric clamping and fast response. |
| Telecom AC-DC Adapter Input | Smart Meter RS-485 Bus |
Use Scenario: Secondary-side surge suppression on 48V telecom rectifier outputs subjected to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: High-power (1500W) TVS absorbing multi-kA transients before they reach downstream DC-DC converters and monitoring ICs. Use Value: Enables single-device protection meeting ITU-T K.20/K.21 immunity requirements without derating or parallel staging. | Use Scenario: Protecting half-duplex RS-485 transceivers in utility smart meters installed in outdoor substations vulnerable to induced surges. IC Role / Device Role / Timing Role: Bidirectional clamp across A/B bus lines to suppress ±15kV ESD (IEC 61000-4-2) and 4kV surge (IEC 61000-4-5) events. Use Value: Maintains bus communication integrity during field deployment; no polarity concerns simplify layout and reduce BOM variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 77.0V @ 7.8A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) | Select 1.5SMC47CA when >1000W surge handling or automotive-grade clamping performance is required. |
| SMCJ47CA (Littelfuse) | Identical DO-214AB (SMC) package and 1500W rating; VBR min/max tighter (45.1–48.9V); VC = 64.5V @ 24A | Nearly identical performance; minor VBR tolerance and thermal resistance variation (RθJA = 45°C/W) | 1.5SMC47CA offers cost-effective second-source option with validated automotive qualification and moisture level 1 handling. |
Compared with SMBJ47CA and SMCJ47CA, the 1.5SMC47CA delivers equal surge robustness to SMCJ47CA in the same SMC package while offering broader availability and documented ISO 7637-2 compliance-making it preferred for automotive and industrial power rail protection where 1500W clamping headroom is critical.
Availability
1.5SMC47CA is available at Aetrix Electronics and suitable for automotive power line protection, industrial Ethernet PHY interface, telecom AC-DC adapter input, and smart meter RS-485 bus applications requiring stable component supply and full traceability.
Supply support for 1.5SMC47CA 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 with global AEC-Q101 and industrial qualification capabilities.
The 1.5SMC47CA belongs to TSC's SMC-series TVS platform engineered for high-reliability surge immunity in automotive, industrial, and telecom infrastructure-emphasizing low clamping voltage, tight VBR tolerance, and robust thermal performance in surface-mount form.
FAQ
What does the "CA" suffix indicate in 1.5SMC47CA?
The "CA" suffix in 1.5SMC47CA denotes a bidirectional configuration-meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., 1.5SMC47A), the 1.5SMC47CA has no anode/cathode distinction and clamps equally across its two terminals, making it ideal for AC-coupled or floating signal lines where polarity is undefined or reversible.
How does 1.5SMC47CA differ from 1.5SMC47A?
The 1.5SMC47A is unidirectional (anode/cathode marked), intended for DC rail protection with polarity-sensitive placement, whereas the 1.5SMC47CA is bidirectional with no polarity marking. Electrically, 1.5SMC47CA exhibits identical VBR (44.7–49.4V), VC (64.8V), and PPK (1500W) specs but supports clamping in both directions-critical for protecting differential buses like RS-485 or Ethernet PHYs where voltage reversals occur.
Is 1.5SMC47CA compliant with automotive transient standards?
Yes, 1.5SMC47CA is explicitly rated to meet ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements. Its 1500W peak power rating, 64.8V clamping voltage, and 24A impulse current capability ensure robust protection of 12V/24V automotive ECUs, infotainment systems, and body control modules per OEM specifications.
What is the maximum allowable mounting temperature for 1.5SMC47CA during reflow?
The 1.5SMC47CA is rated for moisture sensitivity level 1 per J-STD-020, permitting standard lead-free reflow profiles without pre-baking. Peak reflow temperature must not exceed 260°C for ≤10 seconds, consistent with IPC/JEDEC J-STD-020D. The device's UL 94V-0 molding compound and matte tin-plated leads ensure compatibility with industry-standard SMT assembly processes.
Can 1.5SMC47CA be used in parallel to increase surge current handling?
No-parallel connection of 1.5SMC47CA devices is not recommended due to VBR mismatch (±5% tolerance), which causes uneven current sharing and potential thermal runaway. For higher surge capacity, select a single higher-rated device (e.g., 3.0SMC47CA) or implement staged protection with upstream current-limiting resistors and downstream low-capacitance TVS arrays-always verifying layout symmetry and thermal coupling in the 1.5SMC47CA implementation.
1.5SMC47CA 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
1.5SMC47CA FAQ
1.How can I place an order for 1.5SMC47CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CA 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 1.5SMC47CA reliable?
The price and inventory of 1.5SMC47CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CA?
1.5SMC47CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CA 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 1.5SMC47CA?
For technical support, including 1.5SMC47CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CA requirements.
6.How does Aetrix verify that 1.5SMC47CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CA 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 1.5SMC47CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CA?
All 1.5SMC47CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CA, 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 1.5SMC47CA part is unused and in its original packaging.
Return procedure for 1.5SMC47CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47CA Tags
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