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Taiwan Semiconductor Corporation 1.5SMC39CH
- Part No.:
- 1.5SMC39CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CH.pdf
- Description:
- 1500W, 39V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,135
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Product details
Overview
1.5SMC39CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in power and signal lines. It features a 39V breakdown voltage (min 35.1V, max 42.9V), 1500W peak pulse power rating, 56.4V maximum clamping voltage at 27A peak impulse current, and DO-214AB (SMC) package - ideal for automotive infotainment power rails and industrial I/O interfaces.
For engineers reviewing the 1.5SMC39CH datasheet, 1.5SMC39CH pinout, 1.5SMC39CH application, or 1.5SMC39CH equivalent, key selection criteria include unidirectional/bidirectional configuration (CH = bidirectional), clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature range (–55°C to +150°C), and compliance with AEC-Q101 for automotive-grade reliability.
Technical Context
The 1.5SMC39CH implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 31.6V). Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating circuits without polarity sensitivity.
Thermally, it delivers RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained operation up to TJ = 150°C. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 35.1 V / 42.9 V - ensures reliable triggering above system working voltage (31.6 V VWM) while accommodating process variation |
| VC @ IPPM | 56.4 V at 27 A - limits downstream voltage stress during 10/1000 µs transients per IEC 61000-4-5 |
| PPK | 1500 W - handles high-energy surges such as load dump or lightning-induced spikes in automotive and industrial environments |
| IR @ VWM | <1 µA at 31.6 V - minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| TJ Range | –55°C to +150°C - supports operation in under-hood automotive locations and industrial control cabinets |
| Package | DO-214AB (SMC) - surface-mount footprint compatible with automated placement and reflow, with 0.210 g mass and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; bidirectional symmetry means both terminals are functionally identical - no anode/cathode orientation required. Leads are matte tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Path (Anode/Cathode) | Accepts transient energy from either polarity; connects directly to protected line (e.g., CAN_H or RS-485 A) |
| Terminal 2 | Bidirectional Surge Path (Cathode/Anode) | Completes low-impedance path to ground or return rail during clamping; symmetric with Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives, critical for humid environments |
| Fast response time | <1.0 ps enables clamping before sensitive ICs (e.g., microcontrollers, transceivers) experience overvoltage damage |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained supply chains |
Applications
| Automotive Power Rail Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 39 V. Use Value: Limits peak voltage to ≤56.4 V during 1500 W transients, preventing damage to MCU power supplies and analog front-ends. |
Use Scenario: Safeguarding RS-485 transceivers against ESD and field-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed across differential pair (A–B) and/or common-mode (A–GND, B–GND) to absorb ±15 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ps response ensures clamping occurs before transceiver input stages break down, preserving data integrity. |
| Consumer USB-C Port Protection | Smart Meter Communication Line |
Use Scenario: Shielding USB-C VBUS and CC lines from hot-plug transients and ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS on VBUS (with 39 V standoff) and CC line (with lower-voltage variant) to maintain USB PD negotiation integrity. Use Value: 31.6 V working voltage allows safe operation during 20 V PD profiles while clamping >39 V faults to 56.4 V. |
Use Scenario: Hardening PLC or RF communication lines in utility smart meters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Mounted at meter's external terminal block to shunt induced energy to earth ground before entering isolation barrier. Use Value: 1500 W rating sustains multiple 10/1000 µs surges per IEC 61000-4-5 Level 4 without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39CA | Same DO-214AA (SMB) package; 600 W rating (vs. 1500 W); 60 V clamping at 10 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump | Select only when board space constraints prevent SMC footprint and surge threat level is ≤600 W |
| 1.5KE39CA | Through-hole DO-15 package; same 39 V breakdown; 1500 W rating but slower thermal response (RθJA ≈ 30°C/W) | Requires wave soldering; not compatible with automated SMT lines; higher mounting height | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ39CA and 1.5KE39CA, the 1.5SMC39CH provides superior surge handling in a compact SMT package with AEC-Q101 qualification and ISO 7637-2 compliance - making it the preferred choice for production automotive and industrial systems requiring validated reliability and automated assembly.
Availability
1.5SMC39CH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial RS-485 interface hardening, and consumer USB-C port surge immunity requiring stable component supply and full traceability.
Supply support for 1.5SMC39CH 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 capability.
The 1.5SMC39CH belongs to TSC's automotive-qualified SMC-series TVS family, engineered specifically for high-power transient suppression in harsh environments where reliability, fast response, and regulatory compliance are mandatory.
FAQ
What does the 'CH' suffix indicate in 1.5SMC39CH?
The 'CH' suffix denotes a bidirectional configuration - meaning the 1.5SMC39CH has symmetrical breakdown characteristics in both polarities, enabling use in AC-coupled or floating circuits without polarity concerns. This differs from 'H' (unidirectional) variants, which require correct anode/cathode orientation relative to ground.
Is 1.5SMC39CH compliant with AEC-Q101 and ISO 7637-2?
Yes, the 1.5SMC39CH is explicitly qualified to AEC-Q101 and meets ISO 7637-2 test requirements for Pulse 1, 2a, 2b, 3a, and 3b. These certifications are documented in Taiwan Semiconductor's official datasheet Version B2207 and confirm suitability for automotive power network protection.
What is the maximum clamping voltage of 1.5SMC39CH and at what current is it specified?
The maximum clamping voltage of 1.5SMC39CH is 56.4 V, measured at a peak impulse current (IPPM) of 27 A under the standard 10/1000 µs waveform defined in Fig.5 of the datasheet. This value defines the upper voltage limit imposed on protected circuitry during surge events.
Can 1.5SMC39CH be used in place of a unidirectional 1.5SMC39H?
No - the 1.5SMC39CH is bidirectional and lacks polarity marking, while the 1.5SMC39H is unidirectional with a cathode band. Substituting them requires verifying circuit topology: 1.5SMC39CH works in AC or floating nodes; 1.5SMC39H is required for DC-biased lines referenced to ground with defined polarity.
What is the thermal resistance profile of 1.5SMC39CH and how does it affect PCB layout?
The 1.5SMC39CH has RθJA = 50°C/W and RθJC = 15°C/W. To maintain TJ ≤ 150°C under 1500 W pulses, PCB copper area must provide adequate heat spreading - recommended pad layout per datasheet includes ≥100 mm² of 2 oz copper connected to both terminals to manage transient thermal rise.
1.5SMC39CH 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC39CH FAQ
1.How can I place an order for 1.5SMC39CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CH 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 1.5SMC39CH reliable?
The price and inventory of 1.5SMC39CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CH?
1.5SMC39CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CH 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 1.5SMC39CH?
For technical support, including 1.5SMC39CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CH requirements.
6.How does Aetrix verify that 1.5SMC39CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CH 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 1.5SMC39CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CH?
All 1.5SMC39CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CH, 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 1.5SMC39CH part is unused and in its original packaging.
Return procedure for 1.5SMC39CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CH Tags
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