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Taiwan Semiconductor Corporation 1.5SMC47H
- Part No.:
- 1.5SMC47H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47H.pdf
- Description:
- 1500W, 47V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,326
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Product details
Overview
1.5SMC47H 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 automotive infotainment power inputs and industrial sensor interface protection.
For engineers reviewing the 1.5SMC47H datasheet, 1.5SMC47H pinout, 1.5SMC47H application, or 1.5SMC47H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, unidirectional polarity marking, DO-214AB package thermal resistance (RθJC = 15 °C/W), and leakage current ≤1 µA at VWM.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1.0 ps) to ESD and surge transients. Its unidirectional configuration provides low forward voltage drop (3.5 V @ 50 A) and enables integration into DC-biased circuits where reverse blocking is required without bidirectional conduction paths.
The device meets AEC-Q101 qualification and ISO 7637-2 immunity requirements for automotive electronics, with thermal design supported by RθJA = 50 °C/W and junction temperature range of –55 °C to +150 °C - enabling reliable operation in under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 42.3 V / 51.7 V - defines minimum and maximum guaranteed breakdown threshold at 1 mA test current; determines earliest clamping onset under overvoltage stress |
| VWM | 38.1 V - maximum continuous DC or RMS voltage the device blocks without significant leakage; sets upper limit for protected circuit operating voltage |
| VC @ IPPM | 67.8 V at 23 A - clamping voltage during 10/1000 µs surge; directly limits peak stress on downstream ICs like microcontrollers or CAN transceivers |
| PPK | 1500 W - peak pulse power handling capability; supports robust protection against lightning-induced surges and load dump events |
| IR @ VWM | ≤1 µA - ultra-low reverse leakage ensures minimal power loss and no interference with high-impedance sensing nodes |
| TJ max | +150 °C - maximum junction temperature rating enables use in high-ambient environments such as engine control units and motor drives |
| RθJC | 15 °C/W - low junction-to-case thermal resistance allows effective heat transfer to PCB copper when mounted with adequate thermal pad |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-side reference; carries full surge current during clamping event |
| Cathode | Protected line connection / Voltage reference node | Connected to the line being protected (e.g., 24 V rail); defines polarity and stand-off behavior |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for front-end power protection in ADAS and body control modules |
| Clamping voltage ≤67.8 V @ 23 A | Ensures downstream 3.3 V/5 V logic interfaces remain below absolute maximum ratings during ISO 7637-2 Pulse 2b (inductive switch-off) events |
| Response time <1.0 ps | Fast enough to suppress ESD events (IEC 61000-4-2 ±8 kV contact) before sensitive CMOS inputs experience latch-up or gate oxide damage |
| DO-214AB package with RθJC = 15 °C/W | Enables thermal management via PCB copper pour; supports >1000 cycles of reflow without degradation when following J-STD-020 Level 1 profile |
| Leakage ≤1 µA @ 38.1 V | Prevents measurable current draw in always-on battery-powered systems such as telematics and remote sensors |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V supply input to infotainment head unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input stage. Use Value: Limits transient voltage to ≤67.8 V, preventing damage to buck controller ICs rated for 40 V absolute maximum input. |
Use Scenario: 4–20 mA current loop interface in PLC analog input module subjected to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5SMC47H placed across loop supply terminals with cathode to positive rail. Use Value: Clamps negative transients to near ground while maintaining <1 µA leakage at 24 V nominal, preserving loop accuracy. |
| Telecom DC Feeder Protection | Motor Drive Control Board ESD Suppression |
Use Scenario: –48 V DC power feed to remote radio unit in 5G base station cabinet, subject to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage surge suppression before active OR-ing diodes and hot-swap controllers. Use Value: 1500 W peak power rating absorbs multi-kA induced currents; DO-214AB footprint allows dense layout near connector entry point. |
Use Scenario: Gate drive signal line (e.g., PWM to MOSFET gate) on industrial servo drive board exposed to board-level ESD during maintenance. IC Role / Device Role / Timing Role: Localized TVS placed adjacent to gate driver IC output pin, cathode to VDD, anode to ground. Use Value: Sub-nanosecond response prevents gate oxide puncture; low capacitance avoids signal edge degradation on 100 kHz+ PWM signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A (Bourns) | 45 V standoff, 70 V clamping @ 21.7 A, SMB package (smaller footprint, higher RθJA = 65 °C/W) | Lower power rating (600 W), less suited for sustained load dump; better for space-constrained consumer PCBs | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 3 (0.5 kV) |
| 1.5KE47A (ON Semiconductor) | Through-hole DO-201 package, same 47 V rating, 67 V clamping @ 22.3 A, 1500 W rating | Not surface-mountable; incompatible with automated SMT assembly; higher thermal mass but lower thermal efficiency on PCB | Select only for legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency |
Compared with SMBJ45A and 1.5KE47A, the 1.5SMC47H offers optimal balance of SMT manufacturability, automotive qualification, and thermal performance in DO-214AB - making it preferred for volume automotive and industrial power rail protection where AEC-Q101 compliance and 1500 W surge handling are mandatory.
Availability
1.5SMC47H is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC analog inputs, telecom DC feeder protection, and motor drive control boards requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC47H 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 - headquartered in Hsinchu Science Park, Taiwan.
The 1.5SMC series was developed specifically for AEC-Q101-compliant, high-power surface-mount transient suppression in automotive and industrial environments - emphasizing robust clamping, low leakage, and repeatable surge endurance.
FAQ
What is the polarity configuration of the 1.5SMC47H?
The 1.5SMC47H is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts only during reverse-biased overvoltage events - forward voltage is 3.5 V at 50 A, and it must be oriented with cathode toward the protected line and anode to ground or low-side reference to function correctly.
Does the 1.5SMC47H meet automotive qualification standards?
Yes, the 1.5SMC47H is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. It is rated for junction temperatures from –55 °C to +150 °C and passes JESD201 Class 2 whisker testing - confirming suitability for under-hood and chassis-mounted automotive applications.
What is the maximum clamping voltage of the 1.5SMC47H and at what current is it specified?
The 1.5SMC47H has a maximum clamping voltage (VC) of 67.8 V, measured at a peak pulse current (IPPM) of 23 A using the standard 10/1000 µs double-exponential waveform. This value ensures protected circuits remain within safe operating limits during surge events.
Can the 1.5SMC47H be used in bidirectional applications?
No - the 1.5SMC47H is unidirectional only. For bidirectional protection, TSC offers the 1.5SMC47AH variant (marked FEJ), which provides symmetrical clamping in both directions and is intended for AC-coupled or floating signal lines where polarity reversal may occur.
What packaging and reel quantity is available for the 1.5SMC47H?
The 1.5SMC47H is supplied in DO-214AB (SMC) package on tape-and-reel format, with 3,000 units per reel. The device uses matte tin-plated leads compliant with J-STD-002 solderability standards and is rated Moisture Sensitivity Level 1 per J-STD-020 - allowing unlimited floor life before reflow.
1.5SMC47H 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC47H FAQ
1.How can I place an order for 1.5SMC47H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47H 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 1.5SMC47H reliable?
The price and inventory of 1.5SMC47H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47H is usually 5 days.
3.What payment methods are accepted for 1.5SMC47H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47H?
1.5SMC47H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47H 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 1.5SMC47H?
For technical support, including 1.5SMC47H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47H requirements.
6.How does Aetrix verify that 1.5SMC47H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47H 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 1.5SMC47H meets industry standards.
7.What is the process for return or replacement of 1.5SMC47H?
All 1.5SMC47H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47H, 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 1.5SMC47H part is unused and in its original packaging.
Return procedure for 1.5SMC47H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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