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Taiwan Semiconductor Corporation 1.5SMC47
- Part No.:
- 1.5SMC47
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47.pdf
- Description:
- 1500W, 47V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,613
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Product details
Overview
1.5SMC47 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 42.3–51.7 V breakdown voltage (VBR), 38.1 V working stand-off voltage (VWM), 67.8 V maximum clamping voltage (VC) at 23 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom front-ends, industrial I/O modules, and automotive body-control ECUs.
For engineers reviewing the 1.5SMC47 datasheet, 1.5SMC47 pinout, 1.5SMC47 application, or 1.5SMC47 equivalent, this page delivers verified electrical parameters, DO-214AB package dimensions, clamping behavior under ISO 7637-2 Pulse 1/2a/2b/3a/3b stress, thermal resistance values, and real-world ESD/transient immunity use cases - all specific to the 1.5SMC47 variant.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR (min 42.3 V, max 51.7 V at 1.0 mA test current), it avalanches into low-impedance conduction to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 µA at 38.1 V) and fast response (<1.0 ps).
Thermally, it exhibits RθJA = 50 °C/W and RθJC = 15 °C/W, enabling reliable operation up to TJ = +150 °C. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its DO-214AB molded case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 42.3–51.7 V - defines minimum and maximum avalanche initiation threshold under standardized DC test |
| VWM | 38.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM = 23 A | 67.8 V - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPK | 1500 W - peak pulse power handling capability per single non-repetitive 10/1000 µs waveform |
| IR @ VWM | <1 µA - ultra-low reverse leakage ensures minimal standby power loss in battery-powered systems |
| TJ Range | −55 to +150 °C - operational junction temperature range compatible with under-hood and industrial ambient conditions |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode band marked on one end. Weight: 0.210 g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or lowest potential node in unidirectional configuration |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail or RS-485 bus); polarity-marked band identifies this pin |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity cycles |
| Clamping response <1.0 ps | Fast enough to suppress ESD events (IEC 61000-4-2) and lightning-induced transients before sensitive logic is damaged |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained production environments |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 24 V sensor supply lines against load dump and alternator ripple in vehicle BCMs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and chassis ground to clamp transients above 38.1 V. Use Value: Limits clamped voltage to 67.8 V during 10/1000 µs 23 A surge, preventing damage to MCU GPIOs and level-shifters rated for ≤70 V absolute maximum. |
Use Scenario: Safeguarding 24 V digital input channels on modular PLC I/O cards exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each optocoupler input path, upstream of series current-limiting resistor. Use Value: Withstands repeated ISO 7637-2 Pulse 2b (inductive switch-off) events while maintaining <1 µA leakage at 38.1 V - preserving input threshold accuracy. |
| Telecom Power Feeder Interface | Smart Meter RS-485 Transceiver Port |
Use Scenario: Front-end protection on −48 V DC power feeders in telecom base station cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-feeder line to absorb negative-going surges. Use Value: 1500 W peak power rating handles multi-kA lightning-induced surges on outdoor feeder runs without thermal runaway. |
Use Scenario: Secondary protection on RS-485 A/B differential lines in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, clamping common-mode transients. Use Value: 67.8 V clamping voltage ensures transceiver ICs (e.g., SN65HVD72) remain within safe common-mode range during 8 kV ESD contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A (Bourns) | DO-214AA package; 43 V VBR min/max tighter (40.9–45.2 V); 64.8 V VC @ 24 A | Slightly lower clamping voltage but 20% smaller footprint; lower PPK (600 W) | Select SMBJ43A only if board space is constrained and surge energy is limited to ≤600 W. |
| 1.5KE47A (ON Semiconductor) | Through-hole DO-15 package; same VBR/VC specs; higher thermal mass but incompatible with SMT assembly | Requires wave soldering or hand-soldering; unsuitable for automated high-volume production | Choose 1.5KE47A only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ43A and 1.5KE47A, the 1.5SMC47 offers optimal balance of 1500 W surge capacity, DO-214AB SMT compatibility, and precise 38.1 V stand-off - making it preferred for new automotive and industrial PCB designs requiring high-energy transient immunity and automated placement.
Availability
1.5SMC47 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input cards, telecom power feeders, and smart meter communication ports requiring stable component supply and full compliance with AEC-Q200 stress testing expectations.
Supply support for 1.5SMC47 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The 1.5SMC series targets high-reliability industrial and automotive transient suppression, emphasizing robust glass-passivated junctions, ISO 7637-2 compliance, and tight parametric binning for mission-critical overvoltage protection.
FAQ
What is the polarity configuration of the 1.5SMC47?
The 1.5SMC47 is a unidirectional TVS diode with cathode-band marking indicating the high-side terminal. It conducts only during reverse-biased overvoltage events - i.e., when the cathode voltage exceeds the anode by more than VBR. This configuration is standard for DC rail protection and differs from bidirectional variants (e.g., 1.5SMC47CA) used in AC or differential-line applications. The 1.5SMC47 must be oriented with cathode toward the protected line and anode to ground.
Does the 1.5SMC47 meet automotive transient immunity standards?
Yes, the 1.5SMC47 meets ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) requirements - confirmed in Taiwan Semiconductor's official documentation. Its 1500 W peak power rating and 67.8 V clamping voltage at 23 A enable direct integration into automotive BCM and ECU power inputs without additional RC filtering. The 1.5SMC47 is not AEC-Q200 qualified out-of-box but is widely used in automotive designs meeting that standard via system-level validation.
What is the maximum steady-state power dissipation of the 1.5SMC47?
The 1.5SMC47 has a steady-state power dissipation (PD) of 6.5 W at TA = 25 °C, derating linearly above that ambient temperature per the published derating curve (Fig.2). This value reflects continuous DC power handling - distinct from its 1500 W peak pulse rating. In practice, the 1.5SMC47 sees negligible steady-state dissipation because it only conducts during transient events; sustained conduction indicates failure or incorrect VWM selection. Always verify layout thermal relief and copper area to maintain TJ ≤ 150 °C.
How does the 1.5SMC47 compare to the 1.5SMC47A variant?
The 1.5SMC47A has tighter breakdown voltage tolerance: 44.7–49.4 V vs. 42.3–51.7 V for the 1.5SMC47, with identical VWM (40.2 V), VC (64.8 V @ 24 A), and package. The 1.5SMC47A's narrower VBR bin improves predictability in precision clamping applications but carries a slight cost premium. Both share the same DO-214AB footprint and thermal specs. Choose the 1.5SMC47 for general-purpose protection; select the 1.5SMC47A when VBR consistency across production lots is critical - e.g., in safety-critical sensor bias networks.
Is the 1.5SMC47 compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC47 is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020 Level 1), including peak temperatures up to 260 °C for ≤60 seconds. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its molding compound is rated UL 94V-0. The device's moisture sensitivity level is J-STD-020 Level 1 - meaning it can be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly. No special handling is required for the 1.5SMC47 in high-volume SMT lines.
1.5SMC47 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 38.1V
- Voltage - Breakdown (Min):
- 42.3V
- Voltage - Clamping (Max) @ Ipp:
- 67.8V
- Current - Peak Pulse (10/1000µs):
- 23A
- 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)
1.5SMC47 FAQ
1.How can I place an order for 1.5SMC47 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47 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 1.5SMC47 reliable?
The price and inventory of 1.5SMC47 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47 is usually 5 days.
3.What payment methods are accepted for 1.5SMC47?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47?
1.5SMC47 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47 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 1.5SMC47?
For technical support, including 1.5SMC47 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47 requirements.
6.How does Aetrix verify that 1.5SMC47 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47 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 1.5SMC47 meets industry standards.
7.What is the process for return or replacement of 1.5SMC47?
All 1.5SMC47 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47, 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 1.5SMC47 part is unused and in its original packaging.
Return procedure for 1.5SMC47:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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