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Taiwan Semiconductor Corporation 1.5SMC39H
- Part No.:
- 1.5SMC39H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39H.pdf
- Description:
- 1500W, 39V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,304
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Product details
Overview
1.5SMC39H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 35.1–42.9V breakdown voltage (VBR), and 56.4V maximum clamping voltage (VC@IPPM). It protects automotive and industrial power rails against ESD, load dump, and lightning-induced transients.
For engineers reviewing the 1.5SMC39H datasheet, 1.5SMC39H pinout, 1.5SMC39H application, or 1.5SMC39H equivalent, key selection criteria include clamping performance at 27A peak impulse current, 31.6V working stand-off voltage, AEC-Q101 qualification, ISO 7637-2 compliance, and thermal resistance of 15°C/W junction-to-case.
Technical Context
The 1.5SMC39H operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and low leakage (<1 µA @ 31.6V). Its single-die construction and DO-214AB package support high-energy transient suppression in compact PCB layouts.
Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms. Thermal performance is defined by RθJC = 15°C/W and RθJA = 50°C/W, supporting sustained operation up to TJ = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 35.1 V / 42.9 V - ensures reliable avalanche conduction onset within specified tolerance at 1.0 mA test current |
| VWM | 31.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC@IPPM | 56.4 V - clamped voltage during 27 A 10/1000 µs surge, defining worst-case overvoltage seen by protected circuit |
| IPPM | 27 A - peak impulse current capability under standard 10/1000 µs waveform, derated above 25°C ambient |
| PPK | 1500 W - non-repetitive peak pulse power handling per IEEE C62.35, critical for load-dump immunity |
| TJ max | 150 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210 g mass and J-STD-002 solderability |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, cathode band marking polarity, and 0.210 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); conducts when transient exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (PEM noise) waveforms |
| Fast response time | <1.0 ps - limits voltage overshoot during nanosecond-scale ESD events per IEC 61000-4-2 |
| Low leakage current | <1 µA @ 31.6 V - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Moisture sensitivity level 1 | No floor life limitation per J-STD-020 - enables direct placement without baking or dry-pack requirements |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input rail and chassis ground to clamp surges to ≤56.4 V. Use Value: Enables compliance with ISO 16750-2 (load dump up to 120 V/400 ms) by limiting peak voltage seen by downstream DC-DC converters and microcontrollers. | Use Scenario: Shielding digital input channels on programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, shunting transients before signal conditioning circuitry. Use Value: Maintains signal integrity during 1 kV/50 Ω surge testing (IEC 61000-4-5) with <1 µA leakage preserving high-impedance sensing accuracy. |
| Telecom Power Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-powered equipment front-end DC inputs from Ethernet cable coupling transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input stage, coordinated with upstream fuse and common-mode chokes. Use Value: Survives repeated 10/1000 µs surges up to 27 A while maintaining VWM = 31.6 V to avoid interference with 48 V nominal regulation. | Use Scenario: Suppressing commutation spikes from brushed DC motors in home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Reverse-biased TVS across motor terminals to absorb inductive kickback energy. Use Value: Limits flyback voltage to 56.4 V, preventing MOSFET drain-source breakdown and reducing EMI generation during PWM switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 600 W rating, 36 V VWM, 58.1 V VC@IPPM, DO-214AA (SMB) package | Lower power handling; suitable only for sub-1 kV surge environments | Select when board space is constrained and peak surge energy is ≤600 W |
| 1.5KE39A | Through-hole TO-204AE (DO-41), same VBR/VC but 1500 W rating, higher RθJA (75°C/W) | Requires through-hole assembly; less suitable for automated SMT lines | Select only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ36A and 1.5KE39A, the 1.5SMC39H delivers identical clamping performance in a surface-mount AEC-Q101-qualified package with superior thermal resistance (RθJC = 15°C/W), making it optimal for high-reliability automotive and industrial SMT production.
Availability
1.5SMC39H is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom power interface, and consumer appliance motor drive applications requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC39H 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-compliant production lines.
The 1.5SMCxxH series is designed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness, standardized SMT packaging, and compliance with ISO 7637-2 and AEC-Q101.
FAQ
What is the maximum clamping voltage of the 1.5SMC39H under standard surge conditions?
The 1.5SMC39H has a maximum clamping voltage (VC) of 56.4 V when subjected to its rated peak impulse current of 27 A using the 10/1000 µs waveform per IEC 61000-4-5. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5SMC39H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC39H suitable for automotive applications?
Yes, the 1.5SMC39H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, making it suitable for automotive power line protection including body control modules, infotainment systems, and ADAS sensor interfaces. Its DO-214AB package supports automated SMT assembly, and its 150°C maximum junction temperature accommodates under-hood thermal environments. The 1.5SMC39H is explicitly listed in TSC's automotive-grade product portfolio.
What is the working stand-off voltage (VWM) of the 1.5SMC39H, and why does it matter?
The 1.5SMC39H has a working stand-off voltage (VWM) of 31.6 V, meaning it remains in high-impedance blocking mode below this voltage with leakage <1 µA. This parameter ensures no interference with normal 24 V or 32 V system operation while providing margin before avalanche conduction begins. Selecting a VWM ≥110% of nominal rail voltage prevents false triggering - a critical design rule applied in the 1.5SMC39H's use in 24 V automotive systems.
How does the 1.5SMC39H compare to bidirectional TVS diodes like 1.5SMC39AH?
The 1.5SMC39H is unidirectional and intended for DC line protection with defined polarity, whereas the 1.5SMC39AH is bidirectional and suited for AC or floating signal lines. The 1.5SMC39H has identical VBR (35.1–42.9 V) and VC (56.4 V) ratings but lacks symmetrical conduction - it blocks in reverse and conducts only when cathode voltage exceeds anode by >VWM. For 24 V DC rails, the 1.5SMC39H offers lower capacitance and tighter leakage control than its bidirectional counterpart.
What is the thermal resistance profile of the 1.5SMC39H, and how does it affect PCB layout?
The 1.5SMC39H has a junction-to-case thermal resistance (RθJC) of 15°C/W and junction-to-ambient (RθJA) of 50°C/W under standard JEDEC conditions. To maintain TJ ≤150°C during repetitive surges, PCB copper area under the cathode/anode pads must provide adequate heat spreading. Layout best practices include ≥100 mm² of 2 oz copper connected to both terminals and avoidance of thermal isolation - a requirement directly enabled by the 1.5SMC39H's low RθJC.
1.5SMC39H 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 27A
- 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)
1.5SMC39H FAQ
1.How can I place an order for 1.5SMC39H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39H 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 1.5SMC39H reliable?
The price and inventory of 1.5SMC39H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39H?
1.5SMC39H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39H 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 1.5SMC39H?
For technical support, including 1.5SMC39H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39H requirements.
6.How does Aetrix verify that 1.5SMC39H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39H 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 1.5SMC39H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39H?
All 1.5SMC39H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39H, 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 1.5SMC39H part is unused and in its original packaging.
Return procedure for 1.5SMC39H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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