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Diodes Incorporated 1.5KE39A-T
- Part No.:
- 1.5KE39A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39A-T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,585
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Product details
Overview
1.5KE39A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 33.3V reverse standoff voltage, 37.1V minimum breakdown voltage at 1mA test current, 53.9V maximum clamping voltage at 28A peak pulse current, and operates across -55°C to +175°C.
For engineers reviewing the 1.5KE39A-T datasheet, 1.5KE39A-T pinout, 1.5KE39A-T application, or 1.5KE39A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under IEC 61000-4-5 surge waveforms, thermal derating above +25°C ambient, and axial lead solderability per MIL-STD-202 Method 208.
Technical Context
This unidirectional TVS diode uses glass-passivated silicon junction technology to achieve fast response time (<1.0 ns) and stable clamping performance under repetitive 8.3ms half-sine surge events. Its DO-201 axial package enables through-hole mounting on industrial power supplies and automotive control modules where mechanical robustness and high surge energy absorption are required.
The device complies with RoHS 3 (2015/863/EU), contains <900ppm bromine and chlorine combined, and is halogen- and antimony-free. It is not AEC-Q200 qualified; automotive use requires direct consultation with Diodes Incorporated for PPAP-capable alternatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms pulse - absorbs IEC 61000-4-5 Level 4 surges (4kV/2Ω) without failure |
| Reverse Standoff Voltage | 33.3V - maximum continuous DC voltage before significant leakage; sets upper limit for protected circuit operating voltage |
| Breakdown Voltage | 37.1V min @ 1mA - onset of avalanche conduction; defines transition from high-impedance to low-impedance clamping state |
| Clamping Voltage | 53.9V max @ 28A - maximum voltage seen by downstream circuit during full-rated surge event |
| Peak Pulse Current | 28A @ 10/1000μs waveform - quantifies surge current handling capacity under standard lightning surge test profile |
| Operating Temperature | -55°C to +175°C - supports under-hood automotive, industrial motor drives, and outdoor power equipment |
| Leakage Current | 5.0μA max @ 33.3V - ensures minimal standby power loss and no false triggering in low-power systems |
Pinout & Package
DO-201 axial-leaded package with cathode band marking; leads are tin-finished, solderable per MIL-STD-202 Method 208, and rated for 9.5mm lead length thermal dissipation at 75°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; establishes reference for unidirectional clamping action |
| Cathode | High-side connection point | Connected to protected line; conducts avalanche current when line voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable long-term reliability and reduced parameter drift under thermal cycling and humidity stress |
| 1500W peak pulse rating | Supports single-event surge immunity up to 4kV (IEC 61000-4-5, 2Ω source impedance) |
| Fast response time | <1.0 ns turn-on delay ensures clamping occurs before sensitive downstream components experience overvoltage |
| RoHS 3 & "Green" compliance | Meets EU Directive 2015/863/EU with <900ppm Br+Cl and <1000ppm Sb; suitable for eco-sensitive end markets |
| Axial DO-201 package | Enables manual or wave soldering; provides mechanical strength for high-vibration environments like transportation electronics |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input rail and ground, triggered within nanoseconds of transient onset. Use Value: Limits voltage to ≤53.9V during 28A surge, protecting upstream rectifier and downstream DC-DC controller ICs rated for 60V absolute maximum. |
Use Scenario: 12V power rail feeding CAN transceiver in vehicle door module subject to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Standby protector on VCC line; remains non-conductive below 33.3V, clamps only during >40V transients. Use Value: Prevents latch-up or permanent damage to CAN PHY ICs while maintaining normal operation during 12V nominal and ±10% variation. |
| Telecom AC/DC Adapter Surge Protection | Renewable Energy Inverter DC Link Protection |
|
Use Scenario: Secondary-side 48V output of telecom wall adapter subjected to conducted EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Fast-acting shunt element parallel to output capacitor; diverts transient energy to ground before reaching load. Use Value: Maintains output regulation integrity by limiting overshoot to <54V, avoiding reset or brownout of connected PoE controllers. |
Use Scenario: DC link bus (300–400V) in solar microinverter exposed to lightning-induced surges via PV string wiring. IC Role / Device Role / Timing Role: Secondary-level clamp supplementing MOV-based front-end protection; handles residual fast-rising edges. Use Value: Adds <1ns response layer to reduce dv/dt stress on IGBT gate drivers and improve system-level surge pass rate by 2× per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (Diodes Inc.) | Lower 600W rating, 36V standoff, DO-214AA (SMB) surface-mount package | Designed for PCB space-constrained designs; lacks axial lead mechanical retention for high-vibration use | Select when board area is limited and surge requirement is ≤600W; not drop-in for through-hole layouts |
| 1.5KE39CA (Diodes Inc.) | Bidirectional variant with identical 33.3V standoff and 53.9V clamping, same DO-201 package | Protects AC-coupled or bidirectional signal lines (e.g., RS-485, audio); no cathode marking | Choose for symmetrical surge protection where polarity reversal is possible; same thermal and surge specs |
Compared with SMBJ36A, 1.5KE39A-T delivers 2.5× higher surge energy handling and axial mechanical stability; versus 1.5KE39CA, it offers polarity-specific clamping essential for DC rail protection with tighter leakage control.
Availability
1.5KE39A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and renewable energy inverters requiring stable component supply and legacy through-hole compatibility.
Supply support for 1.5KE39A-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' 1.5KE series of high-power unidirectional/bidirectional TVS diodes, engineered specifically for cost-effective, high-reliability overvoltage protection in industrial and transportation power systems.
FAQ
What is the maximum clamping voltage of the 1.5KE39A-T under full-rated surge conditions?
The 1.5KE39A-T exhibits a maximum clamping voltage of 53.9V when subjected to its rated 28A peak pulse current (10/1000μs waveform). This value is measured at the device terminals under standardized test conditions and defines the worst-case overvoltage imposed on protected circuitry during surge events.
Can the 1.5KE39A-T be used in automotive applications requiring AEC-Q200 qualification?
No - the 1.5KE39A-T is not AEC-Q200 qualified. Diodes Incorporated explicitly states that automotive applications requiring AEC-Q200, PPAP, or IATF 16949 manufacturing must be addressed separately via direct engagement with their automotive sales team; this part is intended for industrial and commercial use only.
How does the DO-201 package affect thermal performance compared to surface-mount alternatives?
The DO-201 axial package allows 5.0W steady-state power dissipation at 75°C lead temperature with 9.5mm lead length, leveraging PCB copper pour and lead conduction for heat spreading. Unlike SMD packages, it avoids solder-joint thermal fatigue under repeated surge cycling but requires more board area and manual/wave soldering infrastructure.
What is the significance of the "-T" suffix in the part number 1.5KE39A-T?
The "-T" suffix denotes tape-and-reel packaging: 1,000 units per 13-inch reel. This format supports automated pick-and-place assembly for through-hole insertion machines capable of handling axial components, enabling high-volume production while maintaining moisture sensitivity level 1 compliance per J-STD-020.
1.5KE39A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 28A
- 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-T FAQ
1.How can I place an order for 1.5KE39A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39A-T 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-T reliable?
The price and inventory of 1.5KE39A-T 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-T is usually 5 days.
3.What payment methods are accepted for 1.5KE39A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39A-T?
1.5KE39A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39A-T 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-T?
For technical support, including 1.5KE39A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39A-T requirements.
6.How does Aetrix verify that 1.5KE39A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE39A-T 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-T meets industry standards.
7.What is the process for return or replacement of 1.5KE39A-T?
All 1.5KE39A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39A-T, 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-T part is unused and in its original packaging.
Return procedure for 1.5KE39A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39A-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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