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Taiwan Semiconductor Corporation 1.5KE39A
- Part No.:
- 1.5KE39A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39A.pdf
- Description:
- TVS 1500W 39.1V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
1.5KE39A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 39V, minimum VBR of 37.1V at 1.0mA test current, maximum clamping voltage of 53.9V at 29A peak pulse current, and DO-201 axial package - designed for automotive-grade inductive load protection and ESD immunity in power supply rails and signal lines.
For engineers reviewing the 1.5KE39A datasheet, 1.5KE39A pinout, 1.5KE39A application, or 1.5KE39A equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, ISO 7637-2 compliance, thermal derating behavior, and real-world clamping performance under 10/1000μs surge conditions.
Technical Context
The 1.5KE39A operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its 37.1–41.0V breakdown range. Its low dynamic impedance ensures rapid energy diversion during transients, while junction temperature rating up to +175°C supports under-hood automotive deployment.
It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms and exhibits <1μA leakage at 33.3V working stand-off voltage. The device is not bidirectional - polarity is marked on the DO-201 case with a cathode band, and forward voltage is 3.5V at 50A for VBR ≤200V devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1.0mA | 37.1–41.0V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 33.3V - maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP=29A | 53.9V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard waveform |
| Junction Temp Range | −55°C to +175°C - enables operation in engine control units and industrial motor drives |
| Leakage Current | <1μA @ 33.3V - ensures minimal standby power loss in always-on circuits |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems requiring reliability under thermal cycling and vibration |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; tin-plated leads compliant with J-STD-002 solderability; UL 94V-0 molding compound; weight ≈0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse-biased avalanche terminal | Connected to protected line (e.g., 12V rail); cathode band identifies polarity on body |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating | Withstands 10/1000μs transients up to 29A without degradation - suitable for load-dump protection |
| Fast response time | <1.0ps rise-to-VBR - clamps before sensitive logic or analog circuitry sustains damage |
| Low dynamic impedance | Ensures stable clamping voltage across varying surge amplitudes - critical for predictable protection margin |
| ISO 7637-2 compliance | Validated against automotive transient standards including Pulse 1 (inductive switch-off), 2a/2b (battery disconnect), and 3a/3b (capacitive coupling) |
| AEC-Q101 qualification | Qualified for automotive applications per stress test requirements - supports PPAP documentation |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 33.3V. Use Value: Limits peak voltage to 53.9V during 29A transients, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding gate drivers and feedback sensors in variable-frequency AC motor inverters. IC Role / Device Role / Timing Role: Mounted across DC-link capacitors or IGBT collector-emitter to absorb switching-induced spikes. Use Value: 1500W rating handles repetitive inductive kickback; −55°C to +175°C range matches inverter thermal envelope. |
| LED Lighting Surge Suppression | Telecom Power Interface |
Use Scenario: Shielding constant-current LED drivers from lightning-induced surges on AC input or 24V DC bus. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-rail to suppress positive-going transients only. Use Value: 33.3V VWM allows normal operation during brownouts; 53.9V VC prevents LED string overvoltage failure. |
Use Scenario: Front-end protection for PoE-powered equipment exposed to induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Placed on DC input side of isolated DC/DC converter to limit input rail excursion. Use Value: AEC-Q101 qualification adds robustness beyond commercial-grade TVS; DO-201 enables manual rework in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Lower peak power (600W), smaller SMB package, 36V VBR min = 39.8V, VC = 58.1V @ 10.3A | Not AEC-Q101 qualified; limited to commercial/industrial use; lower surge margin | Select when board space is constrained and 600W surge capacity suffices |
| 1N6285A (same as 1.5KE39A) | JEDEC-registered part number; identical electrical specs, DO-201 package, and AEC-Q101 qualification | No functional difference - dual-marking variant used interchangeably in BOMs | Direct cross-reference; no design change required |
Compared with SMBJ36A, the 1.5KE39A delivers 2.5× higher surge power and automotive qualification; compared with 1N6285A, it is the same device - no performance or reliability distinction exists between these dual-marked parts.
Availability
1.5KE39A is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive interfaces, LED lighting surge suppression, and telecom power input stages requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE39A 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capabilities.
The 1.5KE series was engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing rugged packaging, repeatable clamping, and compliance with ISO 7637-2 and AEC-Q101 stress testing protocols.
FAQ
What is the breakdown voltage tolerance of the 1.5KE39A?
The 1.5KE39A has a specified breakdown voltage range of 37.1V to 41.0V at 1.0mA test current, corresponding to ±5% tolerance around the nominal 39V rating. This tight VBR window ensures consistent turn-on behavior across production lots and supports predictable system-level overvoltage protection margins in designs using the 1.5KE39A.
Is the 1.5KE39A bidirectional or unidirectional?
The 1.5KE39A is a unidirectional TVS diode, intended for reverse-biased operation only. It features a cathode band marking on the DO-201 package and does not conduct in forward bias beyond its 3.5V forward voltage at 50A. Bidirectional variants in the same family carry "CA" suffixes (e.g., 1.5KE39CA); the 1.5KE39A is strictly unidirectional.
Does the 1.5KE39A meet automotive qualification standards?
Yes - the 1.5KE39A is AEC-Q101 qualified and explicitly validated for automotive applications. It complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements, and its −55°C to +175°C junction temperature range supports under-hood deployment. The "H" suffix in ordering codes (e.g., 1.5KE39AH) denotes AEC-Q101 qualification.
What is the maximum clamping voltage of the 1.5KE39A during a surge event?
The 1.5KE39A clamps to a maximum of 53.9V when subjected to a 29A peak pulse current with a 10/1000μs waveform. This VC value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings when using the 1.5KE39A.
Can the 1.5KE39A be used in place of the 1N6285A?
Yes - the 1.5KE39A and 1N6285A are identical devices with identical electrical specifications, DO-201 packaging, AEC-Q101 qualification, and thermal ratings. They share the same VBR, VWM, VC, and surge capability. The dual part numbering reflects JEDEC registration (1N6285A) and manufacturer series branding (1.5KE39A); no redesign or validation is needed when substituting the 1.5KE39A for the 1N6285A.
1.5KE39A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 29A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE39A FAQ
1.How can I place an order for 1.5KE39A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39A 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 1.5KE39A reliable?
The price and inventory of 1.5KE39A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39A is usually 5 days.
3.What payment methods are accepted for 1.5KE39A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39A?
1.5KE39A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39A 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 1.5KE39A?
For technical support, including 1.5KE39A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39A requirements.
6.How does Aetrix verify that 1.5KE39A is sourced from the original manufacturer or authorized distributors?
All 1.5KE39A 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 1.5KE39A meets industry standards.
7.What is the process for return or replacement of 1.5KE39A?
All 1.5KE39A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39A, 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 1.5KE39A part is unused and in its original packaging.
Return procedure for 1.5KE39A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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