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Taiwan Semiconductor Corporation 1.5SMC43H
- Part No.:
- 1.5SMC43H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43H.pdf
- Description:
- 1500W, 43V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
1.5SMC43H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 38.7–47.3V breakdown voltage (VBR), and 61.9V maximum clamping voltage (VC) at 25A peak impulse current. It provides ESD and surge protection for DC power rails and signal lines in automotive and industrial control systems.
For engineers reviewing the 1.5SMC43H datasheet, 1.5SMC43H pinout, 1.5SMC43H application, or 1.5SMC43H equivalent, this device is selected for high-energy transient immunity where fast response (<1.0 ps), low leakage (<1 µA @ 34.8 V), and AEC-Q101 qualification are required in space-constrained SMT designs.
Technical Context
The 1.5SMC43H operates as a unidirectional avalanche diode with glass-passivated junction, enabling precise voltage clamping during transients while maintaining stable VBR (±5% tolerance) and low temperature coefficient (0.101%/°C). Its 150°C max junction temperature and JESD201 Class 2 whisker resistance support reliability in harsh thermal environments.
Designed to meet ISO 7637-2 Pulse 1/2a/2b/3a/3b test requirements, it delivers consistent clamping performance across 8.3 ms surge waveforms and supports bidirectional variants (e.g., 1.5SMC43AH) via suffix change - though 1.5SMC43H itself is strictly unidirectional with cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 38.7 V / 47.3 V - defines guaranteed avalanche conduction onset range under 1 mA test current |
| VWM | 34.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 61.9 V at 25 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - peak pulse power handling capability per single 1 ms transient |
| IR @ VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive or industrial motor drive environments |
| Package | DO-214AB (SMC) - standardized surface-mount outline with 0.210 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band on unidirectional devices. Leads conform to J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surges (e.g., reverse-battery events) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units and body modules |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| ISO 7637-2 compliance | Guarantees robustness against load-dump and inductive switching transients in 12 V/24 V vehicle systems |
| Fast response time | <1.0 ps - limits voltage overshoot before clamping engages, protecting sensitive IC inputs |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking, reducing manufacturing complexity and cost |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 36 V nominal battery-fed ECUs from load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Limits peak voltage to 61.9 V at 25 A, preventing latch-up or gate oxide damage in downstream semiconductors. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff protector on field-side signal lines, absorbing 10/1000 µs surges induced by inductive switching. Use Value: Maintains <1 µA leakage at 34.8 V, preserving input threshold accuracy while surviving repeated 1500 W transients. |
| Telecom DC Power Interface | Consumer Equipment USB Power Line |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC bus, coordinated with secondary MOVs and filtering. Use Value: Withstands 1500 W single-event pulses and meets IEC 61000-4-5 Level 4 requirements when used with proper layout. |
Use Scenario: Adding surge resilience to 5 V USB-C power delivery paths in smart home hubs. IC Role / Device Role / Timing Role: Secondary-stage clamping device after primary common-mode chokes and fuses. Use Value: Clamps to 61.9 V within <1 ps, preventing overvoltage propagation to USB PD controllers and port switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Bidirectional variant with same VBR range (38.7–47.3 V) but symmetric clamping; DO-214AA (SMB) package, lower PPK (600 W) | Suitable for AC-coupled or floating signal lines where polarity reversal occurs | Select SMBJ43A only if bidirectional protection and smaller footprint are prioritized over 1500 W rating |
| 1.5KE43A | Through-hole TO-204AA (DO-41) package; identical electrical specs but slower thermal response and no AEC-Q101 qualification | Used in legacy industrial power supplies where board space and automated assembly are not constraints | Choose 1.5KE43A for cost-sensitive, non-automotive through-hole designs requiring same clamping performance |
Compared with 1.5SMC43H, SMBJ43A offers bidirectional capability in a smaller package but sacrifices 60% peak power handling, while 1.5KE43A retains full electrical equivalence but lacks surface-mount compatibility and automotive qualification - making 1.5SMC43H optimal for high-reliability SMT deployments.
Availability
1.5SMC43H is available at Aetrix Electronics and suitable for automotive control units, industrial PLC I/O modules, and telecom power interfaces requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC43H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs since 1979.
The 1.5SMC series was developed to deliver high-power, AEC-Q101-qualified transient suppression in compact SMC packages for next-generation automotive and industrial electronics demanding robust EMC performance.
FAQ
What is the polarity configuration of the 1.5SMC43H?
The 1.5SMC43H is a unidirectional TVS diode with cathode indicated by a band on the DO-214AB (SMC) package. It conducts in forward bias and clamps in reverse bias above VBR. Unlike its AH-suffix counterpart, 1.5SMC43H does not support bidirectional operation and must be oriented correctly in-circuit to protect against negative transients on grounded lines or positive transients on VCC rails.
Does the 1.5SMC43H meet automotive qualification standards?
Yes, the 1.5SMC43H is AEC-Q101 qualified and tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. This certification confirms its suitability for use in automotive electronic control units, body electronics, and infotainment systems where transient immunity and long-term reliability under thermal cycling are mandatory.
What is the maximum clamping voltage of the 1.5SMC43H under surge conditions?
The 1.5SMC43H has a maximum clamping voltage (VC) of 61.9 V at 25 A peak impulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events.
Can the 1.5SMC43H be used in bidirectional protection schemes?
No - the 1.5SMC43H is strictly unidirectional. For bidirectional protection, the 1.5SMC43AH variant must be used. The AH suffix denotes symmetrical breakdown characteristics in both polarities, whereas 1.5SMC43H clamps only in reverse bias and conducts forward current like a standard diode; using it in reverse-polarity configurations risks failure.
What packaging and reel quantity is offered for the 1.5SMC43H?
The 1.5SMC43H is supplied in DO-214AB (SMC) package on 3,000-piece tape-and-reel format, optimized for high-speed pick-and-place assembly. The reel complies with EIA-481 standards, and the device's moisture sensitivity level (MSL) is rated Level 1 per J-STD-020, eliminating bake requirements prior to reflow.
1.5SMC43H 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 25A
- 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)
1.5SMC43H FAQ
1.How can I place an order for 1.5SMC43H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43H 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 1.5SMC43H reliable?
The price and inventory of 1.5SMC43H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43H?
1.5SMC43H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43H 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 1.5SMC43H?
For technical support, including 1.5SMC43H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43H requirements.
6.How does Aetrix verify that 1.5SMC43H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43H 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 1.5SMC43H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43H?
All 1.5SMC43H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43H, 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 1.5SMC43H part is unused and in its original packaging.
Return procedure for 1.5SMC43H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43H Tags
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