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Taiwan Semiconductor Corporation 1.5SMC47AH
- Part No.:
- 1.5SMC47AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47AH.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,704
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Product details
Overview
1.5SMC47AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 47 V nominal breakdown voltage (44.7–49.4 V), 1500 W peak pulse power rating, 64.8 V maximum clamping voltage at 24 A peak impulse current, and DO-214AB (SMC) package. It is widely used in automotive infotainment power rails to suppress load-dump and ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5SMC47AH datasheet, 1.5SMC47AH pinout, 1.5SMC47AH application, or 1.5SMC47AH equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, leakage current at operating voltage (≤1 µA @ 40.2 V), thermal resistance (RθJA = 50 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The 1.5SMC47AH employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps typical) and low leakage (<1 µA at VWM). Its unidirectional configuration provides asymmetric clamping-low forward voltage (~3.5 V @ 50 A) only in forward conduction, while reverse operation clamps at 64.8 V under 24 A 10/1000 µs surge.
Thermally, it delivers 6.5 W steady-state dissipation at 25 °C ambient with RθJC = 15 °C/W, enabling integration into compact PCB layouts without forced airflow. It meets ISO 7637-2 test pulses and complies with J-STD-020 moisture sensitivity level 1, supporting standard reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 44.7 V / 49.4 V - ensures reliable triggering above system nominal voltage (e.g., 36 V automotive) while avoiding false trips during ripple or tolerance drift |
| VWM | 40.2 V - maximum continuous reverse standoff voltage; must exceed highest expected operating voltage to prevent leakage-induced power loss |
| VC @ IPPM | 64.8 V @ 24 A - defines worst-case clamped voltage seen by downstream circuitry during 10/1000 µs surge; critical for IC overvoltage margining |
| IPPM | 24 A - peak impulse current capacity per single 10/1000 µs waveform; determines survivability against standardized automotive transients |
| PPK | 1500 W - peak pulse power handling; enables robust protection against high-energy events like load dump without thermal runaway |
| TJ Max | +150 °C - maximum junction temperature; supports operation in under-hood environments with minimal derating up to 125 °C ambient |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance; informs required copper area and airflow for thermal management in layout |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line (e.g., +12 V rail) | Connected to source of transient energy; carries full surge current during clamping |
| Cathode | Ground reference or return path | Connected to local ground plane; establishes clamping threshold relative to reference; marked by band on package |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Ensures stable VBR over time and temperature, with <0.101 %/°C tempco and minimal parameter drift after 1000 hrs HTOL |
| ISO 7637-2 compliance | Guaranteed performance against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) waveforms |
| Low leakage at VWM | ≤1 µA @ 40.2 V enables use in always-on circuits (e.g., CAN bus standby nodes) without battery drain concerns |
| Fast response time | <1.0 ps typical response ensures clamping initiates before sensitive downstream components experience damaging overvoltage |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 36–48 V DC power inputs in vehicle body control modules against load-dump transients up to 60 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Clamps to 64.8 V within <1 ps, limiting voltage stress on 75 V-rated input stages and preserving system uptime during battery alternator faults. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, mounted directly at connector entry point. Use Value: Absorbs 1500 W peak energy from 10/1000 µs surges while maintaining <1 µA leakage to avoid false triggering of optocoupler-based level detection. |
| Telecom DC Feeder Protection | Consumer Appliance Motor Drive Supply |
Use Scenario: Shielding PoE-powered network switches and base stations from lightning-induced surges entering via 48 V DC feeder lines. IC Role / Device Role / Timing Role: Primary surge suppression device upstream of DC-DC regulation and Ethernet PHY power domains. Use Value: Withstands repeated 24 A impulses per IEC 61000-4-5 Combination Wave testing, ensuring long-term reliability in outdoor telecom cabinets. |
Use Scenario: Suppressing commutation spikes on 40 V DC bus feeding BLDC motor drivers in cordless power tools and robotic vacuum cleaners. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional 1.5SMC47AH protects positive rail only, paired with reverse-polarity protection FET. Use Value: Delivers 64.8 V clamping at 24 A with 50 °C/W thermal resistance, enabling compact heatsink-free placement near motor gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 77.0 V @ 7.7 A | Lower surge capacity limits use to sub-automotive industrial or consumer-grade systems | Select when space constraints favor SMB footprint and surge energy is ≤600 W |
| 1.5KE47A | Through-hole DO-15 package; identical electrical specs but incompatible mounting; higher RθJA ≈ 60 °C/W | Requires PCB redesign; unsuitable for automated SMT assembly or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ47A and 1.5KE47A, the 1.5SMC47AH offers superior 1500 W surge handling in an SMT-optimized DO-214AB package with best-in-class thermal resistance (50 °C/W), making it the preferred choice for AEC-Q101-compliant automotive and high-reliability industrial power rail protection.
Availability
1.5SMC47AH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, AEC-Q101 qualification, and consistent 1500 W surge immunity.
Supply support for 1.5SMC47AH 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 distribution and AEC-Q101 validation capabilities.
The 1.5SMCxxAH series was developed specifically for high-reliability automotive and industrial DC power line protection, emphasizing low clamping voltage, fast response, and robust thermal performance in surface-mount packages.
FAQ
What is the polarity configuration of the 1.5SMC47AH?
The 1.5SMC47AH is a unidirectional TVS diode, meaning it conducts only in reverse-bias (avalanche) mode to clamp overvoltage transients. Its cathode is marked by a band on the DO-214AB package and must be connected toward the system ground reference. Forward conduction occurs only below ~3.5 V, which is relevant only during fault conditions like reverse battery connection.
Does the 1.5SMC47AH meet automotive qualification standards?
Yes, the 1.5SMC47AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. It also complies with J-STD-020 moisture sensitivity level 1 and passes JESD 201 Class 2 whisker testing, confirming suitability for automotive under-hood and body electronics applications.
What is the maximum clamping voltage of the 1.5SMC47AH under surge conditions?
The 1.5SMC47AH has a maximum clamping voltage (VC) of 64.8 V at 24 A peak impulse current (IPPM) using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during transient events.
Can the 1.5SMC47AH be used in bidirectional applications?
No - the 1.5SMC47AH is unidirectional only. For bidirectional protection, TSC offers the 1.5SMC47CAH variant (with CAH suffix), which provides symmetrical clamping in both polarities. Using the 1.5SMC47AH in AC or reversible signal paths would result in forward conduction and potential failure during negative transients.
How does the 1.5SMC47AH compare thermally to similar SMC-package TVS diodes?
The 1.5SMC47AH has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W, measured on standard JEDEC 2S2P test board. This is among the lowest for 1500 W SMC TVS devices, enabling higher sustained power handling and reduced thermal derating - especially valuable in enclosed automotive ECUs where airflow is limited.
1.5SMC47AH 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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC47AH FAQ
1.How can I place an order for 1.5SMC47AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47AH 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 1.5SMC47AH reliable?
The price and inventory of 1.5SMC47AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC47AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47AH?
1.5SMC47AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47AH 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 1.5SMC47AH?
For technical support, including 1.5SMC47AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47AH requirements.
6.How does Aetrix verify that 1.5SMC47AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47AH 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 1.5SMC47AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC47AH?
All 1.5SMC47AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47AH, 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 1.5SMC47AH part is unused and in its original packaging.
Return procedure for 1.5SMC47AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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