1.5KE30A Alternative / Equivalent / Replacement

YINT Electronics — Transient Voltage Suppression (TVS) Diode

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1. Introduction

The 1.5KE30A is a 1500W unidirectional TVS diode that protects equipment from voltage transients caused by lightning, inductive load switching, and ESD. It has a stand-off voltage of 25.6V and a breakdown voltage range of 28.5V to 31.5V. This diode works in industrial control systems, telecom equipment, power supplies, and automotive electronics.

The 1.5KE30A is a JEDEC-registered industry standard number 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 in the DO-201 through-hole package. 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 and electrical characterization on every device for guaranteed performance.

Engineers looking for a 1.5KE30A replacement or 1.5KE30A alternative can specify the YINT 1.5KE30A as a direct drop-in equivalent. It offers tight breakdown tolerance and low reverse leakage for consistent, reliable performance across every production lot. The 1.0µA maximum leakage current minimizes power loss in sensitive circuits. YINT's manufacturing process includes 100% surge testing on every device to guarantee compliance with published specifications, giving designers full confidence in their protection circuit design.

2. Product Overview

The 1.5KE series is one of the most widely used TVS diode families for medium-power surge protection. It covers breakdown voltages from 6.8V to 440V in the DO-201 through-hole package. Each part delivers 1500W of peak pulse power dissipation for a broad range of surge protection applications from low-voltage logic to high-voltage power systems.

The 1.5KE30A is a 1500W rated variant for protecting 24V DC power rails in industrial and telecom systems. Its stand-off voltage of 25.6V lets it sit across a 24V supply line 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 41.4V.

YINT produces the full 1.5KE series from 1.5KE6.8A through 1.5KE440A. This complete voltage coverage lets customers source all DO-201 TVS needs from one manufacturing partner, simplifying supply chain management and reducing qualification costs. The 1.5KE30A uses advanced silicon avalanche technology with tight process controls for consistent breakdown voltage and surge current capability across every production lot. YINT's 19+ years of experience in circuit protection manufacturing means every device benefits from mature, proven production processes that deliver reliable long-term performance.

3. Key Features

• Peak Pulse Power: 1500W — 10/1000µs waveform, robust 24V rail protection
• Stand-off Voltage: 25.6V — Suitable for 24V DC power rails
• Breakdown Voltage: 28.5V ~ 31.5V — Tight tolerance for consistent clamping
• Max Clamping Voltage: 41.4V — Minimizes stress on downstream components
• Peak Pulse Current: 36.2A — High surge capability for industrial loads
• Reverse Leakage: 1.0µA max — Extremely 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 Through-Hole Package — Industry-standard PCB compatible
• RoHS Compliant — Lead-free and environmentally friendly

4. Specifications

5. Cross Reference

The 1.5KE30A is a JEDEC-registered part used by all major TVS manufacturers. YINT's 1.5KE30A is a direct drop-in replacement with identical or tighter electrical specifications, ensuring compatibility without redesign. Engineers searching for a 1.5KE30A equivalent can confidently choose YINT as a universal cross-reference option.

6. Comparison with Similar Models

Engineers often compare the 1.5KE30A with nearby voltage variants and alternative packages. The table below shows key differences to help select the right 1.5KE30A equivalent for each design.

The 1.5KE30A provides the best balance of power, surge current, and package size for 24V DC rail protection. For SMD designs, the SMCJ30A matches 1500W power in a surface-mount SMC package, while the SMAJ30A and SMBJ30A offer 400W and 600W respectively in compact footprints. The P6KE30A is a lower-power through-hole option at 600W. For voltage variants, the 1.5KE27A offers a lower breakdown voltage at 25.7-28.4V, and the 1.5KE33A offers a higher breakdown of 31.4-34.7V. The YINT 1.5KE30A delivers 36.2A peak pulse current at 41.4V clamping, making it the strongest through-hole choice for 24V DC rail protection in industrial and telecom systems where high surge currents are common.

7. Applications

• 24V DC power rail surge protection in industrial control systems and PLC I/O modules
• Telecom and networking equipment 24V DC bus primary protection
• Switching power supply 24V output rectifier transient suppression
• Automotive electronics 24V vehicle system load dump and transient protection
• Lightning surge protection per IEC 61000-4-5 and ITU-T K.20/K.21
• Motor drive and relay inductive load switching transient suppression
• Battery charging and DC-DC converter 24V output protection
• HVAC and building automation system 24V power rail clamping
• Solar inverter and off-grid power system DC bus protection
• LED street lighting and industrial lighting power input transient protection
• Uninterruptible power supply (UPS) 24V DC bus transient clamping
• Test and measurement equipment 24V power input protection

8. Why Choose YINT

• 19+ years of manufacturing expertise in circuit protection and power semiconductors 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 with responsive customer service
• Full 1.5KE series from 6.8V to 440V for one-stop DO-201 TVS sourcing across all voltage ratings
• Direct OEM replacement — pin-to-pin compatible with 1.5KE30A from all major brands without any PCB redesign
• 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 1.5KE30A a direct replacement for Littelfuse or Vishay 1.5KE30A?
A: Yes. The YINT 1.5KE30A has identical electrical specs and DO-201 package dimensions. It drops in without any PCB redesign.

Q2: What is the difference between 1.5KE30A and 1.5KE30CA?
A: 1.5KE30A is unidirectional for DC circuits, while 1.5KE30CA is bidirectional for AC circuits. The "CA" suffix indicates a bidirectional device.

Q3: What is the peak pulse power rating of 1.5KE30A?
A: 1500W for a 10/1000µs exponential waveform at 25°C. Power must be derated at elevated temperatures above 25°C.

Q4: What voltage rail does the 1.5KE30A protect?
A: It protects 24V DC power rails with a stand-off voltage of 25.6V and clamping at 41.4V.

Q5: What is the response time?
A: Less than 1 nanosecond, providing instantaneous protection against ESD and fast transients.

Q6: How does 1.5KE30A compare with P6KE30A?
A: Both have the same breakdown voltage range. 1.5KE30A offers 1500W power and 36.2A surge current, while P6KE30A offers 600W and 14.5A in a smaller DO-15 package.

Q7: What is the operating temperature range?
A: -55°C to +150°C junction temperature, suitable for industrial and outdoor applications.

Q8: Does YINT provide free samples for testing?
A: Yes. Contact YINT with your project details for sample requests and qualification support.

11. Conclusion

YINT Electronics' 1.5KE30A 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 tight breakdown range of 28.5-31.5V and low clamping voltage of 41.4V for robust 24V DC rail protection in industrial and telecom 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.