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Vishay General Semiconductor - Diodes Division 1.5KE39CA-E3/73
- Part No.:
- 1.5KE39CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CA-E3/73.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,441
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Product details
Overview
1.5KE39CA-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 53.9 V at 27.8 A, and operates across –55 °C to +175 °C. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in automotive and industrial power supplies.
For engineers reviewing the 1.5KE39CA-E3/73 datasheet, 1.5KE39CA-E3/73 pinout, 1.5KE39CA-E3/73 application, or 1.5KE39CA-E3/73 equivalent, this device serves as a robust, RoHS-compliant, commercial-grade TVS with verified bidirectional clamping, low incremental surge resistance, and UL 94 V-0 molded epoxy packaging - critical for ESD and surge immunity validation in DC bus and I/O line protection designs.
Technical Context
This bidirectional TVS diode uses a glass passivated silicon junction optimized for sub-nanosecond response (<1 ns) and stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle. Its symmetrical avalanche structure ensures identical electrical behavior in both polarities, enabling direct placement across AC-coupled or floating differential lines without polarity concerns.
It delivers 53.9 V clamping at 27.8 A peak pulse current while maintaining low thermal resistance (RθJL = 15.4 °C/W) and supports soldering up to 275 °C for 10 s per JESD 22-B106. The 1.5KE package provides mechanical robustness and meets UL 497B recognition for protector classification (QVGQ2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 37.1–41.0 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Stand-off Voltage (VWM) | 33.3 V max - ensures no conduction during normal 33 V DC operation, preserving system efficiency |
| Clamping Voltage (VC) | 53.9 V at 27.8 A - limits transient voltage seen by downstream components to safe levels |
| Peak Pulse Power (PPPM) | 1500 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and industrial switching events |
| Operating Temperature | –55 °C to +175 °C - enables deployment in under-hood automotive, motor drives, and industrial control cabinets |
| Package | Case Style 1.5KE - industry-standard axial-leaded DO-201AD package with 0.375" lead length for through-hole mounting and thermal relief |
| RoHS Compliance | E3 suffix - meets JEDEC JESD201 Class 1A whisker test and RoHS Directive 2011/65/EU for lead-free assembly |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminal | Either lead functions identically - enables flexible PCB layout with no orientation constraints on AC or floating nodes |
| Leads (2) | Thermal and current path to PCB copper | 0.375" (9.5 mm) lead length optimizes heat dissipation into board copper; RθJL = 15.4 °C/W supports sustained surge handling |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) without degradation |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry can be damaged (tR < 1 ns) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising surges, improving protection margin for 3.3 V/5 V ICs |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring third-party safety certification |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and lighting modules against ISO 7637-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point to limit bus voltage to ≤54 V during 100 ms surges. Use Value: Prevents latch-up and gate oxide rupture in MCU power rails and CAN transceivers without adding series impedance. |
Use Scenario: Shielding 4–20 mA current loop and RS-485 transceivers from field-induced surges in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional shunt clamp across differential pair or supply rail to absorb ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal integrity during transient events with no DC bias shift or added capacitance affecting 1 Mbps data rates. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV, providing precise clamping to protect bridge rectifier and PWM controller ICs. Use Value: Reduces required MOV energy rating and extends overall surge lifetime by sharing energy with low-clamp diode. |
Use Scenario: Protecting DSL/telephone line interface ICs from longitudinal surges per GR-1089-CORE and ITU-T K.20/K.44. IC Role / Device Role / Timing Role: Bidirectional clamp across tip/ring lines to suppress common-mode surges up to 10/700 µs waveform. Use Value: Enables compliance with Telcordia GR-1089 immunity requirements while minimizing insertion loss below 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), smaller SMB package (surface-mount), VBR = 40–44.2 V | Preferred for space-constrained PCBs where 600 W surge rating suffices and reflow assembly is used | Select when footprint reduction and automated assembly outweigh need for 1500 W capability |
| 1.5KE39C | Same 1.5KE package and electrical specs, but lacks E3 RoHS/commercial grade designation (older revision) | Acceptable for legacy designs where JESD201 whisker testing and full RoHS compliance are not mandated | Use only if existing qualification data covers non-E3 variant; otherwise prefer 1.5KE39CA-E3/73 for new designs |
Compared with SMBJ36CA and 1.5KE39C, the 1.5KE39CA-E3/73 offers higher surge robustness in a through-hole package with certified RoHS compliance and extended temperature range - making it optimal for high-reliability automotive and industrial power entry protection where mechanical retention and thermal margin are critical.
Availability
1.5KE39CA-E3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, consumer power adapter input stages, and telecom line card surge protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE39CA-E3/73 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven clamping performance and thermal resilience.
FAQ
What is the breakdown voltage tolerance of the 1.5KE39CA-E3/73?
The 1.5KE39CA-E3/73 has a specified breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1.0 mA test current, representing a ±5.2% tolerance about the nominal 39 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports predictable system-level overvoltage design margins without additional derating.
Is the 1.5KE39CA-E3/73 suitable for automotive applications?
Yes, the 1.5KE39CA-E3/73 is widely deployed in automotive power distribution modules and body control units for load-dump and jump-start protection. While the E3 suffix denotes commercial grade (not AEC-Q101 qualified), its –55 °C to +175 °C operating range, 1500 W surge rating, and UL 497B recognition meet functional safety requirements for non-safety-critical subsystems per ISO 16750-2.
How does the clamping voltage of the 1.5KE39CA-E3/73 compare to its breakdown voltage?
The 1.5KE39CA-E3/73 clamps at 53.9 V when subjected to its rated 27.8 A peak pulse current (10/1000 µs), which is approximately 38% above its minimum breakdown voltage of 37.1 V. This incremental clamping voltage (ΔVC = 16.8 V) reflects low dynamic resistance and ensures protected circuits remain within safe operating limits during high-current transients.
Can the 1.5KE39CA-E3/73 be used in bidirectional AC signal lines?
Yes - the CA suffix explicitly denotes bidirectional construction, and the 1.5KE39CA-E3/73 exhibits symmetrical VBR, VC, and leakage characteristics in both polarities. It is routinely applied across AC-coupled sensor outputs, RS-485 differential pairs, and telecom tip/ring lines where polarity-independent surge suppression is required.
What is the maximum allowable soldering temperature for the 1.5KE39CA-E3/73?
The 1.5KE39CA-E3/73 supports solder dip at up to 275 °C for 10 seconds per JESD 22-B106, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for reliable wetting. Reflow profiles must stay within JEDEC J-STD-020 moisture sensitivity level (MSL) guidelines - though as a non-MOS device, it carries no MSL rating and is not moisture-sensitive.
1.5KE39CA-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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
1.5KE39CA-E3/73 FAQ
1.How can I place an order for 1.5KE39CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CA-E3/73 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 1.5KE39CA-E3/73 reliable?
The price and inventory of 1.5KE39CA-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39CA-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE39CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CA-E3/73?
1.5KE39CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CA-E3/73 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 1.5KE39CA-E3/73?
For technical support, including 1.5KE39CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE39CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CA-E3/73 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 1.5KE39CA-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE39CA-E3/73?
All 1.5KE39CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CA-E3/73, 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 1.5KE39CA-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE39CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CA-E3/73 Tags
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