1.5KE400A Alternative / Equivalent / Replacement

YINT Electronics — Transient Voltage Suppression (TVS) Diode

Target Keywords: 1.5KE400A alternative, 1.5KE400A equivalent, 1.5KE400A replacement, 1.5KE400A substitute, 1.5KE400A cross reference

1. Introduction

The 1.5KE400A is a 1500W unidirectional TVS diode that protects high-voltage equipment from power surges caused by lightning, AC line transients, and inductive load switching. It has a stand-off voltage of 342V and a breakdown voltage range of 380V to 420V. This diode is designed for industrial power systems, telecom rectifiers, AC/DC converters, and renewable energy inverters.

The 1.5KE400A is a JEDEC-registered industry standard number in the DO-201 (DO-27) through-hole package, compatible across all major TVS manufacturers including Littelfuse, Vishay, ON Semiconductor, Diodes Incorporated, STMicroelectronics, Bourns, and Taiwan Semiconductor. YINT Electronics manufactures this model as a fully compatible replacement. The device responds in less than 1 nanosecond and delivers 1500W peak pulse power (10/1000µs waveform). YINT's manufacturing process includes 100% surge testing on every device.

Engineers looking for a 1.5KE400A replacement or 1.5KE400A alternative can specify the YINT 1.5KE400A as a direct drop-in equivalent. It offers tight breakdown tolerance and low reverse leakage for consistent, reliable performance across every production lot.

2. Product Overview

The 1.5KE series is a widely used high-power TVS diode family for through-hole applications. It covers breakdown voltages from 6.8V to 540V in the DO-201 (DO-27) package. Each part delivers 1500W of peak pulse power dissipation for demanding surge protection applications in industrial and utility equipment.

The 1.5KE400A is a 1500W rated variant for protecting 342V to 400V DC power rails and 220V/277V AC lines. Its stand-off voltage of 342V lets it sit across high-voltage supply lines without conducting under normal conditions. It responds in less than 1 nanosecond when a transient overvoltage event occurs, clamping the surge to a maximum of 548V with a 2.7A peak pulse current capability.

YINT produces the full 1.5KE series from 1.5KE6.8A through 1.5KE540A. This complete voltage coverage lets customers source all DO-201 TVS needs from one manufacturing partner. The 1.5KE400A uses advanced silicon avalanche technology with tight process controls for consistent breakdown voltage across every production lot.

3. Key Features

• Peak Pulse Power: 1500W — 10/1000µs waveform, robust high-voltage protection
• Stand-off Voltage: 342V — Suitable for 342V-400V DC rails and 220V AC line
• Breakdown Voltage: 380 ~ 420V — Tight tolerance for consistent clamping
• Max Clamping Voltage: 548V — Minimizes stress on downstream components
• Peak Pulse Current: 2.7A — 10/1000µs waveform capability
• Reverse Leakage: 1.0µA max — Very low standby power loss
• Response Time: < 1ns — Instant ESD and transient protection
• Temperature Range: -55°C to +150°C — Industrial and outdoor use
• DO-201 (DO-27) Through-Hole Package — Industry-standard high-power package
• RoHS Compliant — Lead-free and environmentally friendly

4. Specifications

5. Cross Reference

The 1.5KE400A is a JEDEC-registered part used by all major TVS manufacturers. YINT's 1.5KE400A is a direct drop-in replacement with identical or tighter electrical specifications. Engineers searching for a 1.5KE400A equivalent can confidently choose YINT as a universal cross-reference option.

6. Comparison with Similar Models

Engineers often compare the 1.5KE400A with nearby voltage variants and alternative series. The table below shows key differences.

The 1.5KE400A delivers the highest power handling for 342V-400V rail protection in a through-hole package. For applications with lower power requirements, the P6KE400A offers 600W in a smaller DO-15 package with identical breakdown and clamping specs. For surface-mount designs, the SMCJ400A provides 1500W in an SMC footprint but with a higher voltage range. Choose the 1.5KE400A for robust high-voltage protection in industrial power systems.

7. Applications

• 220V/277V AC power line transient suppression in industrial equipment
• 342V-400V DC bus protection in telecom rectifiers and power supplies
• AC/DC converter input surge clamping for PFC output stages
• Solar inverter and three-phase rectifier DC bus protection
• Lightning surge protection per IEC 61000-4-5 and ITU-T K.20/K.21
• Motor drive and VFD DC link transient suppression
• EV fast charger and battery storage system DC bus protection
• Uninterruptible power supply (UPS) high-voltage rail clamping
• HVAC chiller and industrial machinery power input protection
• Medical imaging and diagnostic equipment power supply protection

8. Why Choose YINT

• 19+ years of manufacturing expertise in circuit protection since 2006
• 40+ patents and certifications with robust process control per MIL-STD and JEDEC standards
• Global sales network serving North America, Europe, Asia, and Latin America
• Full 1.5KE series from 6.8V to 540V for one-stop DO-201 TVS sourcing
• Direct OEM replacement — pin-to-pin compatible with 1.5KE400A from all major brands
• Engineering team available for application assistance and cross-reference verification
• Free samples for testing and qualification upon request
• Direct manufacturer pricing with volume discounts available

9. Ordering Information

10. FAQ

Q1: Is YINT 1.5KE400A a direct replacement for Littelfuse or Vishay 1.5KE400A?
A: Yes. The YINT 1.5KE400A has identical electrical specs and DO-201 package dimensions. It drops in without any PCB redesign.

Q2: What is the difference between 1.5KE400A and 1.5KE400CA?
A: 1.5KE400A is unidirectional for DC circuits. 1.5KE400CA is bidirectional for AC circuits.

Q3: What is the peak pulse power rating of 1.5KE400A?
A: 1500W for a 10/1000µs exponential waveform at 25°C. Derate power at elevated temperatures above 25°C.

Q4: Can 1.5KE400A be used for 220V AC protection?
A: Yes. The 342V stand-off and 380-420V breakdown range is suitable for 220V AC line transient protection. For 110V AC, use 1.5KE200A instead.

Q5: How does 1.5KE400A compare with P6KE400A?
A: Both share identical breakdown (380-420V) and clamping (548V) voltage ranges. The 1.5KE400A offers 1500W vs P6KE400A's 600W, with a larger DO-201 package.

Q6: What is the response time?
A: Less than 1 nanosecond, providing instantaneous protection against ESD and fast transients.

11. Conclusion

YINT Electronics' 1.5KE400A is a reliable, high-performance replacement for industry-standard models from Littelfuse, Vishay, ON Semiconductor, and other major brands. It delivers 1500W peak pulse power with a breakdown range of 380-420V and clamping voltage of 548V for robust high-voltage protection in industrial power, telecom rectifier, and renewable energy applications.

Contact YINT Electronics at global@yint.com.cn for datasheets, samples, or pricing. Our engineering team is ready to assist with cross-references and application support.