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Taiwan Semiconductor Corporation 1.5SMC47CH
- Part No.:
- 1.5SMC47CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CH.pdf
- Description:
- 1500W, 47V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,442
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Product details
Overview
1.5SMC47CH 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 47V breakdown voltage (min 42.3V, max 51.7V), 1500W peak pulse power rating, 67.8V maximum clamping voltage at 23A, and DO-214AB (SMC) package with AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5SMC47CH datasheet, 1.5SMC47CH pinout, 1.5SMC47CH application, or 1.5SMC47CH equivalent, this device is selected for robust ESD and lightning-induced transient suppression in automotive infotainment power supplies, industrial I/O interfaces, and telecom line cards where fast response (<1.0 ps), low leakage (<1 µA @ 38.1V), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are critical.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling single-device protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5% for 1.5SMC47CH), low temperature coefficient (0.101%/°C), and reliable performance across –55°C to +150°C junction temperature range.
The device delivers 1500W peak pulse power (10/1000 µs waveform), with thermal resistance of RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained operation under repetitive surges when PCB copper area and airflow meet recommended layout guidelines per DO-214AB footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 42.3–51.7 V @ 1.0 mA - defines minimum voltage at which clamping initiates; tight tolerance enables precise overvoltage threshold setting |
| Working Stand-off Voltage VWM | 38.1 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| Maximum Clamping Voltage VC | 67.8 V @ 23 A (10/1000 µs) - limits transient voltage seen by downstream ICs; critical for protecting 48V system logic |
| Peak Pulse Power PPK | 1500 W - energy-handling capacity for standardized surge waveforms; meets ISO 7637-2 Pulse 5a requirements |
| Junction Temperature Range | –55°C to +150°C - supports under-hood automotive and industrial environments without derating |
| Leakage Current IR | <1 µA @ 38.1 V - negligible standby power loss and minimal impact on high-impedance sensor bias networks |
| Response Time | <1.0 ps - sub-nanosecond turn-on ensures protection before sensitive CMOS inputs experience overstress |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as input/output; no polarity dependency - simplifies layout and eliminates orientation errors during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control modules and ADAS power domains |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD/capacitive coupling) without degradation |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance support high-reliability industrial assembly |
| Fast response & low capacitance | Sub-picosecond switching with typical CJ < 100 pF (at 0 V) preserves signal integrity on data lines up to 100 Mbps |
Applications
| Automotive Infotainment Power Rail | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12V/48V power inputs to head unit MCUs and display drivers against load dump and jump-start surges. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤67.8 V, preventing latch-up or gate oxide damage in 5V/3.3V logic powered from protected rail. |
Use Scenario: Safeguarding 24V digital input channels in programmable logic controllers exposed to field wiring transients. IC Role / Device Role: Bidirectional shunt protector across input optocoupler or Schmitt trigger interface. Use Value: Symmetric clamping ensures protection regardless of induced polarity; 1500W rating handles worst-case inductive kickback from solenoid loads. |
| Telecom Line Card Interface | Medical Diagnostic Equipment Signal Lines |
Use Scenario: Shielding RS-485/RS-232 transceivers on base station line cards from lightning-induced surges on outdoor cabling. IC Role / Device Role: Secondary-level TVS placed after gas discharge tube (GDT) primary protection. Use Value: Low clamping voltage (67.8 V) prevents transceiver damage while maintaining signal fidelity due to sub-100 pF junction capacitance. |
Use Scenario: Protecting analog front-end ADC inputs in ultrasound or MRI subsystems from ESD events during connector mating. IC Role / Device Role: Low-leakage (≤1 µA) TVS on high-impedance sensor signal paths prior to instrumentation amplifiers. Use Value: Prevents baseline shift or saturation in precision measurement circuits without loading the source impedance. |
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 | Same 47V bidirectional rating, but 600W PPK, SMB package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current load dump | Select only if board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 |
| 1.5KE47CA | Through-hole TO-204AA (DO-41), 1500W rating, same VBR/VC, but slower response (~1 ns) and no AEC-Q101 qualification | Not suitable for automated SMT production or automotive under-hood use; requires manual assembly | Choose only for legacy through-hole designs or non-automotive industrial prototypes |
Compared with SMBJ47CA and 1.5KE47CA, the 1.5SMC47CH uniquely combines AEC-Q101 qualification, 1500W capability in a surface-mount DO-214AB package, and sub-1 ps response-making it the only option qualified for high-reliability automotive power rail protection requiring zero-layout rework.
Availability
1.5SMC47CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, telecom line cards, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for 1.5SMC47CH 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, and rectifiers with global distribution and AEC-Q101 validation capabilities.
The 1.5SMC series was engineered specifically for high-power, surface-mount transient suppression in automotive and industrial environments-emphasizing rugged packaging, fast response, and compliance with ISO 7637-2 and AEC-Q101 stress test profiles.
FAQ
What does the 'CH' suffix indicate in 1.5SMC47CH?
The 'CH' suffix denotes a bidirectional configuration with symmetrical clamping behavior in both polarities. Unlike unidirectional variants (e.g., 1.5SMC47H), the 1.5SMC47CH has no cathode marking and protects AC-coupled or floating nodes without polarity constraints-critical for RS-485, CAN bus, or transformer-isolated power inputs where voltage polarity reverses during transients.
Is 1.5SMC47CH suitable for protecting a 48V automotive power rail?
Yes, the 1.5SMC47CH is explicitly rated for 48V system protection: its 38.1V working stand-off voltage provides adequate margin above nominal 48V (±10%), while its 67.8V clamping voltage stays well below the 70V absolute maximum rating of most 48V-rated DC-DC controllers. It meets ISO 7637-2 Pulse 5a (load dump) requirements when used with appropriate series impedance.
How does 1.5SMC47CH differ from 1.5SMC47AH?
The 1.5SMC47AH has tighter breakdown voltage tolerance (44.7–49.4 V vs. 42.3–51.7 V for 1.5SMC47CH) and slightly lower clamping voltage (64.8 V vs. 67.8 V), but it is unidirectional. The 1.5SMC47CH's bidirectional symmetry makes it suitable for applications where transient polarity is unpredictable-such as telecom line interfaces or differential signal pairs-whereas 1.5SMC47AH requires correct cathode orientation.
Does 1.5SMC47CH require heatsinking in standard PCB layouts?
No additional heatsink is required for single-pulse or low-duty-cycle surge events. With RθJA = 50°C/W and PPK = 1500W applied for <1 ms, junction temperature rise remains within safe limits using standard 1-inch² 2-oz copper pad per datasheet recommendations. For repetitive surges >1 Hz, thermal simulation or empirical testing is advised to confirm steady-state ΔT.
Can 1.5SMC47CH be used in place of a unidirectional TVS like 1.5SMC47H?
Yes, but only if circuit topology allows bidirectional clamping-i.e., no DC bias across the device or presence of blocking capacitors. Replacing 1.5SMC47H with 1.5SMC47CH in a unidirectional rail may cause unintended conduction during normal operation if forward voltage exceeds 3.5V. Always verify polarity constraints and perform functional testing before substitution.
1.5SMC47CH 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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC47CH FAQ
1.How can I place an order for 1.5SMC47CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CH 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 1.5SMC47CH reliable?
The price and inventory of 1.5SMC47CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CH?
1.5SMC47CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CH 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 1.5SMC47CH?
For technical support, including 1.5SMC47CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CH requirements.
6.How does Aetrix verify that 1.5SMC47CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CH 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 1.5SMC47CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CH?
All 1.5SMC47CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CH, 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 1.5SMC47CH part is unused and in its original packaging.
Return procedure for 1.5SMC47CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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