SMAJ58A Alternative / Equivalent / Replacement

YINT Electronics — Transient Voltage Suppression (TVS) Diode

Target Keywords: SMAJ58A alternative, SMAJ58A equivalent, SMAJ58A replacement, SMAJ58A substitute, SMAJ58A cross reference

1. Introduction

The SMAJ58A is a 400W unidirectional TVS diode that protects circuits from voltage transients caused by lightning, ESD, and inductive load switching. It has a stand-off voltage of 58V and a breakdown voltage range of 64.4V to 71.2V. This device is used in industrial controls, telecom equipment, power supplies, and automotive systems.

The SMAJ58A is a JEDEC-registered industry standard number in the SMA (DO-214AC) surface-mount 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 400W peak pulse power (10/1000µs waveform). YINT's manufacturing process includes 100% surge testing on every device.

Engineers looking for an SMAJ58A replacement or SMAJ58A alternative can specify the YINT SMAJ58A as a direct drop-in equivalent. It features tight breakdown tolerance and low reverse leakage for consistent performance across every production lot.

2. Product Overview

The SMAJ series is one of the most popular TVS diode families for compact surface-mount designs. It covers breakdown voltages from 5.0V to 440V in the SMA (DO-214AC) package. Each part delivers 400W of peak pulse power dissipation for space-constrained surge protection applications.

The SMAJ58A is a 400W rated variant for protecting 58V DC power rails. Its stand-off voltage of 58V lets it sit across a 58V 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 93.6V with a 4.3A peak pulse current capability. The 71.2V maximum breakdown ensures consistent triggering under surge conditions.

YINT produces the full SMAJ series from SMAJ5.0A through SMAJ440A. This complete voltage coverage lets customers source all SMA TVS needs from one manufacturing partner. The SMAJ58A uses advanced silicon avalanche technology with tight process controls for consistent breakdown voltage across every production lot.

3. Key Features

• Peak Pulse Power: 400W — 10/1000µs waveform, compact 58V rail protection
• Stand-off Voltage: 58V — Suitable for 58V DC power rails
• Breakdown Voltage: 64.4 ~ 71.2V — Tight tolerance for consistent clamping
• Max Clamping Voltage: 93.6V — Minimizes stress on downstream components
• Peak Pulse Current: 4.3A — 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
• SMA DO-214AC Package — Compact surface-mount footprint
• RoHS Compliant — Lead-free and environmentally friendly

4. Specifications

5. Cross Reference

The SMAJ58A is a JEDEC-registered part used by all major TVS manufacturers. YINT's SMAJ58A is a direct drop-in replacement with identical or tighter electrical specifications. Engineers searching for an SMAJ58A equivalent can confidently choose YINT as a universal cross-reference option.

6. Comparison with Similar Models

Engineers often compare the SMAJ58A with nearby voltage variants and alternative packages. The table below shows key differences.

The SMAJ58A provides a compact solution for 58V DC rail protection. For higher power needs, the SMBJ58A offers 600W in an SMB package with identical electrical specs. For through-hole designs, nearby P6KE series parts provide alternatives with different voltage ranges. Choose the SMAJ58A when board space is limited and 400W is sufficient for your transient protection requirements.

7. Applications

• 58V DC power rail surge protection in industrial equipment
• Telecom and networking equipment 48V to 60V bus protection
• Power over Ethernet (PoE) power sourcing equipment protection
• Switching power supply output transient suppression
• Battery charger and power adapter output clamping
• LED street lighting and outdoor lighting driver protection
• Security camera and surveillance system power input
• Automotive electronic module protection (48V systems)
• Solar inverter DC bus protection
• Lightning surge protection per IEC 61000-4-5

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 SMAJ series from 5.0V to 440V for one-stop SMA TVS sourcing
• Direct OEM replacement — pin-to-pin compatible with SMAJ58A 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 SMAJ58A a direct replacement for Littelfuse or Vishay SMAJ58A?
A: Yes. The YINT SMAJ58A has identical electrical specs and SMA DO-214AC package dimensions. It drops in without any PCB redesign.

Q2: What is the difference between SMAJ58A and SMAJ58CA?
A: SMAJ58A is unidirectional for DC circuits. SMAJ58CA is bidirectional for AC circuits.

Q3: What is the peak pulse power rating of SMAJ58A?
A: 400W for a 10/1000µs exponential waveform at 25°C. Derate power at elevated temperatures above 25°C.

Q4: What is the clamping voltage of SMAJ58A?
A: 93.6V maximum at 4.3A peak pulse current, providing effective protection for 58V-rated circuits.

Q5: Can SMAJ58A be used for 48V telecom systems?
A: Yes, the 58V stand-off voltage works well for 48V telecom bus protection with adequate safety margin.

Q6: What is the response time of SMAJ58A?
A: Less than 1 nanosecond, providing instantaneous protection against ESD and fast transients.

11. Conclusion

YINT Electronics' SMAJ58A is a reliable, high-performance replacement for industry-standard models from Littelfuse, Vishay, ON Semiconductor, and other major brands. It delivers 400W peak pulse power with a tight breakdown range of 64.4-71.2V and clamping voltage of 93.6V for robust 58V DC rail protection in industrial, telecom, and lighting 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.