SMAJ200A Alternative / Equivalent / Replacement

YINT Electronics — TVS Diode (Uni-directional)

Target Keywords: SMAJ200A alternative, SMAJ200A equivalent, SMAJ200A replacement, SMAJ200A substitute, SMAJ200A cross reference, 200V SMA TVS

1. Introduction

The SMAJ200A is a 400W unidirectional TVS diode in the SMA (DO-214AC) surface-mount package. It protects 200V DC power rails from voltage transients caused by lightning, inductive load switching, and ESD. This diode works in industrial control systems, telecom equipment, and power supplies where board space is at a premium and reliable surge protection is essential for long-term system operation.

The SMAJ200A is manufactured by major TVS brands including Littelfuse, Vishay, ON Semiconductor, Diodes Incorporated, and Bourns. YINT Electronics offers this model as a fully compatible drop-in replacement in the compact SMA surface-mount footprint. The device responds in less than 1 nanosecond and delivers 400W peak pulse power dissipation (10/1000µs waveform).

Engineers searching for a SMAJ200A replacement or SMAJ200A equivalent can specify the YINT SMAJ200A as a direct alternative. It delivers a stand-off voltage of 200V, breakdown range of 224V to 247V, and clamping voltage of 324V. YINT's manufacturing includes 100% surge testing on every device to guarantee compliance with published specifications, giving designers full confidence in their protection circuit design. The device uses the industry-standard SMA marking code and is fully interchangeable with parts from all major manufacturers without any board layout changes.

2. Product Overview

The SMAJ series is one of the most widely used TVS diode families for surface-mount applications worldwide. It covers breakdown voltages from 5.0V to 200V in the compact SMA (DO-214AC) package measuring just 4.6mm x 2.8mm. Each part delivers 400W of peak pulse power dissipation for a broad range of surge protection needs spanning from low-voltage signal lines to high-voltage power systems in industrial, telecom, and consumer electronics.

The SMAJ200A is a 200V rated variant for protecting 200V DC power rails in industrial and telecom equipment. Its stand-off voltage of 200V lets it sit across a 200V DC supply line without conducting under normal conditions. It responds in less than 1 nanosecond when a transient overvoltage occurs, clamping the surge to a maximum of 324V. The 1.0µA maximum leakage current minimizes power loss in sensitive applications where standby power is critical for energy efficiency and thermal management.

YINT produces the full SMAJ series from SMAJ5.0A through SMAJ200A. This complete coverage lets customers source all SMA TVS needs from one partner, simplifying supply chain management. The SMAJ200A uses advanced silicon avalanche technology with tight process controls for consistent breakdown voltage across every production lot. YINT's 19+ years of experience in circuit protection manufacturing ensures mature, proven production processes that deliver reliable long-term performance in demanding environments.

3. Key Features

• Peak Pulse Power: 400W — 10/1000µs waveform, robust 200V rail protection
• Stand-off Voltage: 200V — Suitable for 200V DC power rails
• Breakdown Voltage: 224V ~ 247V — Tight tolerance for consistent clamping
• Max Clamping Voltage: 324V — Minimizes stress on downstream components
• Reverse Leakage: 1.0µA max — Extremely low standby power loss
• Response Time: < 1ns — Instant ESD and transient protection
• SMA (DO-214AC) Package — Compact surface-mount for space-constrained designs
• Temperature Range: -55°C to +150°C — Industrial and outdoor use
• RoHS Compliant — Lead-free and environmentally friendly

4. Specifications

5. Cross Reference

The SMAJ200A is a JEDEC-registered part used by all major TVS manufacturers worldwide. YINT's SMAJ200A is a direct drop-in replacement with identical or tighter electrical specifications in the same DO-214AC (SMA) package. Engineers searching for a SMAJ200A equivalent can confidently choose YINT as a universal cross-reference option for prototyping and production runs of any size.

6. Comparison with Similar Models

Engineers often compare the SMAJ200A with nearby voltage variants and alternative packages. The table below shows key differences to help select the right SMAJ200A equivalent for each design.

The SMAJ200A provides a compact 400W solution for 200V DC rail protection in surface-mount designs. For higher power needs, the SMBJ200A offers 600W and the SMCJ200A delivers 1500W in larger SMD packages. The P6KE200A is a through-hole alternative with the same 190-210V breakdown range in the DO-201 package. The P4SMA200A has a similar SMA footprint but with a lower stand-off voltage of 171V and clamping voltage of 274V, which may suit circuits with lower operating voltages. Choose the SMAJ200A when you need a compact, surface-mount TVS with 200V stand-off voltage and proven industry compatibility for new designs where board space is limited. It is available from YINT with short lead times and competitive pricing for both prototyping and production volumes, backed by full technical support from our engineering team.

7. Applications

• 200V DC power rail surge protection in industrial control systems
• Telecom and networking equipment DC bus transient suppression
• Switching power supply output and intermediate bus protection
• Lightning surge protection per IEC 61000-4-5 and IEC 61643-321 standards
• Motor and relay inductive load switching transient suppression in industrial automation systems
• Solar inverter and battery charging DC bus protection
• EV charging station power input transient protection
• HVAC and building automation system power rail clamping
• Medical device power supply input protection (non-patient connected)
• Test and measurement equipment power input protection
• Uninterruptible power supply (UPS) DC bus transient clamping
• AC/DC converter output stage surge suppression in space-constrained PCB designs

8. Why Choose YINT

• 19+ years of manufacturing expertise in circuit protection since 2006
• 40+ patents and certifications with robust process control per JEDEC standards
• Global sales network serving North America, Europe, Asia, and Latin America with responsive customer service and technical support
• Full SMAJ series from 5.0V to 200V for one-stop SMA TVS sourcing across all voltage ratings in the same package
• Direct SMD replacement — compatible with SMAJ200A from all major brands
• Engineering team available for application assistance and cross-reference verification for all SMAJ series parts
• Free samples for testing and qualification upon request with fast turnaround for engineering evaluation
• Direct manufacturer pricing with volume discounts available for OEM and distribution partners worldwide

9. Ordering Information

10. FAQ

Q1: Is YINT SMAJ200A a direct replacement for Littelfuse or Vishay SMAJ200A?
A: Yes. The YINT SMAJ200A has identical electrical specs and SMA (DO-214AC) package. It drops in without any PCB redesign.

Q2: What is the difference between SMAJ200A and SMAJ200CA?
A: SMAJ200A is unidirectional for DC circuits. SMAJ200CA is bidirectional for AC circuits. The "CA" suffix indicates a bidirectional device.

Q3: What is the peak pulse power rating?
A: 400W for a 10/1000µs exponential waveform at 25°C. Power must be derated at elevated temperatures above 25°C according to the derating curve in the datasheet.

Q4: Can SMAJ200A replace P4SMA200A?
A: Both are 400W SMA TVS diodes but SMAJ200A has 200V stand-off voltage while P4SMA200A has 171V. Check your circuit operating voltage before substitution. For 171V systems, the P4SMA200A may be more appropriate.

Q5: What is the response time?
A: Less than 1 nanosecond, providing instant protection against ESD and fast transients. The device starts conducting immediately when the breakdown voltage is exceeded, clamping the surge before it can damage sensitive downstream components.

Q6: What is the operating temperature range?
A: -55°C to +150°C junction temperature, suitable for industrial and outdoor telecom applications where wide temperature variation is expected.

Q7: 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' SMAJ200A 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 breakdown range of 224-247V and clamping voltage of 324V for robust 200V DC rail protection in industrial, telecom, and power supply applications. The compact SMA package saves valuable board space while providing full protection against lightning surges, ESD events, and inductive load switching transients. YINT's proven manufacturing processes and 100% surge testing ensure every device meets its rated specifications for consistent protection across all production volumes.

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.