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Vishay General Semiconductor - Diodes Division 1.5KE39-E3/54
- Part No.:
- 1.5KE39-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39-E3/54.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
1.5KE39-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 33.3 V stand-off voltage (VWM), 53.9 V clamping voltage (VC) at 27.8 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature. It is used in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE39-E3/54 datasheet, 1.5KE39-E3/54 pinout, 1.5KE39-E3/54 application, or 1.5KE39-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal derating guidance, and RoHS-compliant commercial-grade sourcing status - all critical for ESD/lightning transient design validation.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR and limits transient energy to ≤53.9 V at 27.8 A (10/1000 µs), with a maximum reverse leakage of 1.0 µA at VWM = 33.3 V and forward voltage of 3.5 V at 100 A.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15.4 °C/W (junction-to-lead), enabling reliable operation up to TJ = 175 °C. The device complies with JESD 22-B106 (solder dip: 275 °C max, 10 s) and JESD 201 Class 1A whisker testing (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise voltage threshold where avalanche conduction initiates |
| VWM | 33.3 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 27.8 A (10/1000 µs) - peak clamped voltage seen by protected circuit during surge |
| PPPM | 1500 W - peak transient power dissipation capability without failure |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 rated |
Pinout & Package
1.5KE39-E3/54 uses the standard axial-leaded DO-201AD package (Case Style 1.5KE), with cathode identified by a color band on one end. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Dimensions: 5.3 mm diameter × 9.5 mm lead length (0.210" × 0.375").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., 24 V supply rail); conducts when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from inductive switching or lightning-induced surges in industrial controls |
| Clamping ratio VC/VBR ≈ 1.42 | Minimizes overvoltage stress on downstream ICs while maintaining margin above VWM |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and 275 °C solder dip (10 s) requirements |
| UL 94 V-0 molded epoxy body | Provides flame-retardant mechanical encapsulation suitable for safety-critical board-level mounting |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary shunt clamp placed between power rail and chassis ground; responds within <1 ns to divert surge current. Use Value: Limits rail voltage to ≤53.9 V during 1500 W transients, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA loop drivers) from ESD and field-wiring induced spikes in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-signal line; clamps negative transients and blocks positive overvoltage. Use Value: Maintains signal integrity with <1.0 µA leakage at 33.3 V, while surviving repeated 27.8 A pulses without parameter shift. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding PoE-powered equipment front-ends against lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS on input stage; operates below VWM during normal operation, activates only during transients. Use Value: Achieves 1500 W surge handling without derating at 75 °C ambient, validated per IEC 61000-4-5 (10/1000 µs). |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge supply rails to absorb inductive kickback energy. Use Value: Withstands 200 A non-repetitive forward surge (8.3 ms), enabling robust protection without fuse coordination issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | DO-214AA package; lower PPPM = 600 W; VBR = 40–44.2 V; VC = 58.1 V @ 10.3 A | Surface-mount solution for space-constrained PCBs; not suitable for 1500 W surge events | Select when board area is limited and peak surge energy is ≤600 W; requires re-layout due to SMD footprint. |
| 1.5KE36-E3/54 | Lower VBR (34.2–37.8 V); VWM = 30.8 V; VC = 49.9 V @ 30.1 A; identical package and construction | Better fit for 24 V systems requiring tighter clamping margin below 50 V | Drop-in replacement if system VWM tolerance allows 30.8 V; same thermal and mechanical behavior as 1.5KE39-E3/54. |
Compared with 1.5KE39-E3/54, SMBJ36A trades surge capacity for compactness, while 1.5KE36-E3/54 offers lower clamping voltage at reduced standoff - both retain the same DO-201AD form factor and RoHS/E3 compliance but serve distinct voltage-margin and energy-handling priorities.
Availability
1.5KE39-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feed applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5KE39-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge immunity and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE39-E3/54?
The 1.5KE39-E3/54 has a specified breakdown voltage range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 39 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports predictable overvoltage protection design in 24 V and 36 V systems.
Is 1.5KE39-E3/54 suitable for bidirectional transient protection?
No, 1.5KE39-E3/54 is a unidirectional TVS diode, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., 1.5KE39CA). The unidirectional configuration provides asymmetric clamping - conducting only when cathode voltage exceeds anode by ≥VBR - making it ideal for DC rail protection where polarity is fixed.
What is the maximum clamping voltage of 1.5KE39-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE39-E3/54 is 53.9 V at a peak pulse current (IPPM) of 27.8 A with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case surge events and is critical for ensuring downstream components remain within absolute maximum ratings.
Does 1.5KE39-E3/54 meet automotive qualification standards?
The base 1.5KE39-E3/54 is a commercial-grade part and is not AEC-Q101 qualified. However, the AEC-Q101 variant is designated as 1.5KE39AHE3_B (with "HE3" and revision code), which shares identical electrical specs but adds automotive-grade process validation and extended reliability testing per AEC-Q101.
How does thermal derating affect 1.5KE39-E3/54 power handling above 25 °C?
1.5KE39-E3/54 must be derated linearly above 25 °C ambient: its 6.5 W steady-state power dissipation drops to zero at 175 °C junction temperature. For example, at 75 °C ambient, maximum allowable power reduces to ~4.5 W. Derating curves are provided in Figure 5 of Vishay document 88301 to ensure safe operation under real-world thermal conditions.
1.5KE39-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 26.6A
- 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:
- 1.5KE
1.5KE39-E3/54 FAQ
1.How can I place an order for 1.5KE39-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39-E3/54 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 1.5KE39-E3/54 reliable?
The price and inventory of 1.5KE39-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE39-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39-E3/54?
1.5KE39-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39-E3/54 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 1.5KE39-E3/54?
For technical support, including 1.5KE39-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39-E3/54 requirements.
6.How does Aetrix verify that 1.5KE39-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39-E3/54 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 1.5KE39-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE39-E3/54?
All 1.5KE39-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39-E3/54, 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 1.5KE39-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE39-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39-E3/54 Tags
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