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Taiwan Semiconductor Corporation 1.5SMC39
- Part No.:
- 1.5SMC39
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39.pdf
- Description:
- 1500W, 39V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,208
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Product details
Overview
1.5SMC39 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) at 27A peak impulse current. It protects DC power rails and signal lines in telecom and industrial equipment against ESD, lightning surges, and load-switching transients.
For engineers reviewing the 1.5SMC39 datasheet, 1.5SMC39 pinout, 1.5SMC39 application, or 1.5SMC39 equivalent, key selection criteria include its 31.6V working stand-off voltage (VWM), <1μA leakage at VWM, 1.0ps typical response time, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AB thermal performance (RθJA = 50°C/W).
Technical Context
The 1.5SMC39 operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient suppression with low capacitance and stable clamping behavior. Its electrical characteristics are specified at TA = 25°C with 1.0mA test current (IT) and defined per ANSI/IEEE C62.35 standards.
It features a single-die configuration in a moisture-sensitive level 1 (J-STD-020) package, rated for -55°C to +150°C junction temperature, and exhibits a VBR temperature coefficient of 0.100%/°C - critical for thermal stability in automotive and industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 35.1V / 42.9V - defines minimum and maximum guaranteed avalanche onset under 1.0mA test current; sets design margin for overvoltage triggering. |
| VWM | 31.6V - maximum continuous reverse operating voltage before significant leakage; must exceed normal circuit operating voltage. |
| VC @ IPPM | 56.4V at 27A - clamped voltage during 10/1000μs surge; determines protected IC's maximum stress exposure. |
| PPK | 1500W - peak pulse power handling per 1ms non-repetitive waveform; defines surge energy absorption capability. |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| Response time | <1.0ps - enables effective suppression of nanosecond-scale ESD events (e.g., IEC 61000-4-2 Level 4). |
| RθJA | 50°C/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210g. Meets UL 94V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge (e.g., 8.3ms half-sine). |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., VIN or signal); initiates breakdown when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure (MSL Level 1). |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1, 2a, 2b, 3a, 3b), enabling use in vehicle ECUs. |
| Fast response <1.0ps | Suppresses ESD events before sensitive ICs experience latch-up or gate oxide damage (per IEC 61000-4-2). |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive, supporting green manufacturing and end-of-life recycling. |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and 0.210g mass enable automated placement and withstand board-level thermal stress during reflow. |
Applications
| Telecom Line Protection | Industrial Power Input |
|---|---|
Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS placed between data line and ground, clamping common-mode transients while preserving signal integrity. Use Value: 56.4V clamping voltage ensures protected PHY ICs (e.g., MAX13487) remain below absolute maximum ratings during 1kV/2kV surge tests. | Use Scenario: Safeguarding 24V DC input stages of PLC modules exposed to inductive load switching in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp across bulk input capacitor, absorbing 1500W pulses without degradation. Use Value: 1500W peak power rating and 31.6V VWM allow reliable operation across 20–28V nominal rail with margin for brownout recovery. |
| Automotive Body Control Module | Consumer USB Power Delivery |
Use Scenario: Suppressing load-dump transients on LIN bus or sensor supply lines in automotive BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS connected from LIN line to chassis ground, meeting ISO 7637-2 Pulse 5a requirements. Use Value: 0.100%/°C VBR tempco and -55°C to +150°C rating ensure stable clamping across engine bay temperature extremes. | Use Scenario: Protecting USB-C VBUS line (5–20V) against hot-plug ESD and adapter surge in portable chargers. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and GND, selected for low leakage (<1μA) to avoid battery drain. Use Value: 31.6V VWM provides headroom above 20V PD3.0 max, while 56.4V VC prevents downstream buck converter overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (Bourns) | DO-214AA (SMB) package; 36V VWM, 58.1V VC @ 25.9A; 600W rating | Lower power handling; suitable for space-constrained PCBs where 1500W surge is not required | Select SMBJ36A only if board layout limits SMC footprint and peak surge energy is ≤600W. |
| 1.5KE39A (ON Semiconductor) | DO-201AE (axial leaded) package; identical 39V nominal rating but through-hole mounting and 1500W rating | Requires wave soldering or manual assembly; unsuitable for fully SMT production | Choose 1.5KE39A only for legacy through-hole designs or prototyping where reflow compatibility is not needed. |
Compared with SMBJ36A and 1.5KE39A, the 1.5SMC39 delivers identical 39V-class protection in a surface-mount DO-214AB package optimized for automated placement, higher thermal dissipation (RθJA = 50°C/W vs. SMBJ's ~65°C/W), and full ISO 7637-2 compliance - making it preferred for high-volume automotive and industrial SMT lines.
Availability
1.5SMC39 is available at Aetrix Electronics and suitable for telecom line protection, industrial power input stages, automotive body control modules, and consumer USB power delivery systems requiring stable component supply and full surge certification.
Supply support for 1.5SMC39 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, MOSFETs, and power management devices.
The 1.5SMC series was designed specifically for high-energy transient suppression in automotive, industrial, and telecom applications - emphasizing ISO 7637-2 compliance, SMT manufacturability, and stable parametric performance across extended temperature ranges.
FAQ
What is the maximum clamping voltage of the 1.5SMC39 under standard surge conditions?
The 1.5SMC39 has a maximum clamping voltage (VC) of 56.4V at 27A peak impulse current (IPPM) using the 10/1000μs waveform per Fig.5. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during a standardized surge event. The 1.5SMC39 maintains this clamping performance across its full operating temperature range due to its 0.100%/°C VBR temperature coefficient.
Is the 1.5SMC39 suitable for bidirectional transient suppression?
No, the 1.5SMC39 is a unidirectional TVS diode intended for DC line protection where polarity is fixed. For bidirectional applications (e.g., AC lines or differential buses), Taiwan Semiconductor specifies the 1.5SMC39C or 1.5SMC39CA variants - which feature symmetrical breakdown in both directions. Using the unidirectional 1.5SMC39 on AC signals risks forward conduction and potential failure.
What is the working stand-off voltage (VWM) of the 1.5SMC39, and why does it matter?
The 1.5SMC39 has a working stand-off voltage (VWM) of 31.6V, representing the maximum continuous reverse voltage it can block without exceeding 1μA leakage. This parameter is critical for ensuring the device remains inactive during normal operation - for example, on a 24V industrial rail, VWM > 24V prevents false triggering while allowing headroom for ripple and tolerance. Exceeding VWM risks premature conduction and system instability.
Does the 1.5SMC39 meet automotive surge immunity standards?
Yes, the 1.5SMC39 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in automotive electronic systems. Its 1500W peak power rating, fast <1.0ps response, and specified clamping behavior under standardized waveforms make it suitable for protecting LIN, CAN, and sensor supply lines in body control modules and infotainment systems - provided layout follows recommended trace width and grounding practices.
What packaging and moisture sensitivity level does the 1.5SMC39 have?
The 1.5SMC39 is supplied in DO-214AB (SMC) package on 3,000-piece tape-and-reel, with moisture sensitivity level (MSL) 1 per J-STD-020 - meaning it has unlimited floor life and requires no baking prior to reflow soldering. Its matte tin-plated leads comply with J-STD-002 for solderability, and the UL 94V-0 molding compound supports lead-free reflow profiles up to 260°C peak temperature.
1.5SMC39 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC39 FAQ
1.How can I place an order for 1.5SMC39 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39 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 1.5SMC39 reliable?
The price and inventory of 1.5SMC39 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39 is usually 5 days.
3.What payment methods are accepted for 1.5SMC39?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39?
1.5SMC39 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39 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 1.5SMC39?
For technical support, including 1.5SMC39 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39 requirements.
6.How does Aetrix verify that 1.5SMC39 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39 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 1.5SMC39 meets industry standards.
7.What is the process for return or replacement of 1.5SMC39?
All 1.5SMC39 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39, 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 1.5SMC39 part is unused and in its original packaging.
Return procedure for 1.5SMC39:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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