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Taiwan Semiconductor Corporation 1.5KE39C
- Part No.:
- 1.5KE39C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39C.pdf
- Description:
- 1500W, 39V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,085
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Product details
Overview
1.5KE39C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 39V, working stand-off voltage 31.6V, clamping voltage 56.4V at 27A peak pulse current, and junction temperature range −55°C to +175°C - designed for automotive and industrial power rail surge protection.
For engineers reviewing the 1.5KE39C datasheet, 1.5KE39C pinout, 1.5KE39C application, or 1.5KE39C equivalent, key selection criteria include unidirectional polarity, 10/1000μs waveform surge rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low dynamic impedance, and AEC-Q101 qualification availability.
Technical Context
The 1.5KE39C operates as a unidirectional avalanche diode, triggering at VBR = 35.1–42.9V (tested at 1mA), clamping transients to ≤56.4V at IPP = 27A under 10/1000μs waveform. It exhibits fast response time (<1.0ps from 0V to VBR) and low leakage (<1μA at 31.6V).
Thermal performance is rated for TJMAX = 175°C with derating above 25°C ambient; steady-state power dissipation is 5W at lead temperature 75°C on 16mm × 16mm copper pad. Polarity is marked by cathode band per DO-201 mechanical outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 31.6 V - Maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VBR @ IT = 1mA | 35.1–42.9 V - Breakdown voltage range defining reliable avalanche initiation threshold |
| VC @ IPP = 27A | 56.4 V - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak pulse power handling capability per single non-repetitive 10/1000μs event |
| IPP | 27 A - Maximum peak impulse current supported without failure |
| TJMAX | +175°C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-201 - Industry-standard axial-leaded package with tin-plated leads, UL 94V-0 molding compound |
Pinout & Package
DO-201 package: axial-leaded, cylindrical body with cathode band marking polarity for unidirectional operation; lead length 9.5mm, weight ≈0.090g; terminals are pure tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; defines current flow direction during clamping |
| Cathode | Protected line terminal | Connected to protected supply rail (e.g., 24V or 36V bus); avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Surge robustness | 1500W peak pulse power per 10/1000μs waveform - withstands load dump and inductive switching events in automotive 24V systems |
| Clamping precision | 56.4V clamping at 27A - limits voltage overshoot below 1.5× nominal rail, protecting 36V-rated components |
| Leakage control | <1μA at 31.6V - minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| Automotive qualification | AEC-Q101 available (e.g., 1.5KE39CH variant) - validated for temperature cycling, humidity, and mechanical shock in vehicle ECUs |
| Transient immunity | Complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b - meets OEM-level EMC requirements for conducted transients |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V battery-fed control modules against load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 56.4V, ensuring downstream 36V-input regulators and CAN transceivers remain within absolute maximum ratings. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring transients (e.g., relay coil flyback, ESD). IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting fast-rising spikes (<1ns rise time) to ground before signal conditioning circuitry. Use Value: Sub-1.0ps response ensures clamping initiates before 5V/3.3V logic inputs experience damaging overvoltage, preserving signal integrity and latch-up immunity. |
| LED Driver Overvoltage Suppression | Motor Drive Gate Driver Protection |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers subjected to 12V/24V supply line transients in commercial lighting fixtures. IC Role / Device Role / Timing Role: Placed across input capacitor to absorb energy from lightning-induced surges or nearby switching noise coupling. Use Value: 1500W surge rating handles multi-millisecond transients without thermal runaway, maintaining driver uptime in outdoor installations. | Use Scenario: Shielding high-side gate drivers (e.g., driving N-channel MOSFETs in half-bridge inverters) from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Connected between gate drive output and source reference to clamp dv/dt-induced overshoot exceeding gate oxide limits. Use Value: Low dynamic impedance ensures rapid clamping of <10ns spikes, preventing unintended turn-on and shoot-through in motor control stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ39A | Same DO-214AC (SMA) package; lower PPK = 400W; VC = 60.7V @ 6.6A | Not suitable for 1500W load dump; limited to low-energy ESD and EFT | Select only for space-constrained PCBs where surge energy is ≤400W and clamping voltage margin allows 60.7V |
| ON Semiconductor 1N6285A | Same JEDEC 1.5KE39A family; bidirectional variant; identical VBR, VC, and PPK; symmetrical clamping | Required when protecting AC-coupled or dual-polarity signals (e.g., RS-485, CAN FD differential pairs) | Choose 1N6285A only if bidirectional clamping is needed; otherwise 1.5KE39C provides superior unidirectional efficiency and lower leakage |
Compared with SMAJ39A, the 1.5KE39C delivers 3.75× higher surge energy handling and tighter clamping for automotive-grade protection; versus 1N6285A, it offers optimized unidirectional performance with lower leakage and no reverse-direction conduction path.
Availability
1.5KE39C is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant variants.
Supply support for 1.5KE39C 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 qualified product lines.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness under ISO 7637-2 and extended temperature operation up to +175°C junction.
FAQ
What is the polarity configuration of the 1.5KE39C?
The 1.5KE39C is a unidirectional TVS diode, with cathode marked by a band on the DO-201 package body. It conducts only when the cathode is positive relative to the anode, making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like 1.5KE39CA, which protect both polarities.
Does the 1.5KE39C meet automotive qualification standards?
Yes - the 1.5KE39C has an AEC-Q101-qualified variant (e.g., 1.5KE39CH) that undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life. The base 1.5KE39C shares identical electrical specs but requires verification of qualification status per order code suffix.
What is the maximum clamping voltage of the 1.5KE39C under surge conditions?
The 1.5KE39C clamps to a maximum of 56.4V when subjected to a 27A peak pulse current with a 10/1000μs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events.
How does the 1.5KE39C compare to the 1.5KE39A variant?
The 1.5KE39C and 1.5KE39A differ in breakdown voltage tolerance: 1.5KE39C has VBR = 35.1–42.9V (±10%), while 1.5KE39A tightens this to 37.1–41.0V (±5%). Both share identical VC, PPK, and package; the 'A' grade enables more precise clamping threshold control in high-reliability designs.
Can the 1.5KE39C be used in place of a 1N6285 diode?
Yes - the 1.5KE39C is the Taiwan Semiconductor equivalent of the legacy 1N6285 (JEDEC registered part). Both share identical electrical specifications, DO-201 packaging, and pinout. Designers may substitute 1.5KE39C directly into legacy 1N6285 footprints without layout or schematic changes.
1.5KE39C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE39C FAQ
1.How can I place an order for 1.5KE39C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39C 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 1.5KE39C reliable?
The price and inventory of 1.5KE39C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39C is usually 5 days.
3.What payment methods are accepted for 1.5KE39C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39C?
1.5KE39C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39C 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 1.5KE39C?
For technical support, including 1.5KE39C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39C requirements.
6.How does Aetrix verify that 1.5KE39C is sourced from the original manufacturer or authorized distributors?
All 1.5KE39C 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 1.5KE39C meets industry standards.
7.What is the process for return or replacement of 1.5KE39C?
All 1.5KE39C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39C, 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 1.5KE39C part is unused and in its original packaging.
Return procedure for 1.5KE39C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39C Tags
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