Slkor MSB30M Bridge Rectifier: 3A 1000V Surface-Mount Single-Phase Bridge Rectifier

In low and medium-power AC-DC power conversion, home appliance power supplies, LED drivers, battery charging and other circuit systems, bridge rectifiers perform the core function of converting AC input to DC output. Surface-mount bridge rectifiers have become the mainstream choice for compact power supply designs due to their small size and automated assembly capability. The Slkor MSB30M is a single-phase surface-mount bridge rectifier from the MSB30 series. It features a rated average forward rectified current of 3A and a reverse peak withstand voltage of 1000V, with excellent surge current tolerance, low reverse leakage and wide-temperature operating characteristics. Adopting an integrated full-bridge structure and compact SMD package, it effectively simplifies circuit layout and fits various low and medium-power power rectification scenarios.

1. Core Product Parameters

• Device Type: Single-phase bridge rectifier
• Rated Average Forward Rectified Current (IF(AV), single-phase half-wave 60Hz, resistive or inductive load): 3A
• Repetitive Peak Reverse Voltage (VRRM): 1000V
• Peak Forward Surge Current (IFSM, 8.3ms single half-sine wave, JEDEC standard method): 80A
• Operating Junction Temperature Range: -55℃ ~ +150℃
• Package: MSB surface-mount package

2. Core Product Features

2.1 3A Rated Current with Clear Temperature Derating Characteristics

The device delivers a rated average forward rectified current of 3A, covering the rectification input requirements of most low and medium-power power supplies. It provides clear temperature derating curves for single-phase half-wave 60Hz resistive or inductive load scenarios, allowing output power to be properly matched according to actual operating ambient temperature, ensuring operational reliability across the full temperature range and adapting to various types of load circuits.

2.2 High Surge Withstand Capability Against Startup Inrush

It features outstanding forward surge current tolerance. Tested in accordance with JEDEC standard methods, it can withstand high peak surge current under 8.3ms single half-sine wave conditions. It effectively suppresses inrush current at power-on, reduces the risk of damage to rectifier devices caused by startup spikes, and improves the durability of the overall power supply system.

2.3 Low Reverse Leakage with Stable High-Temperature Performance

The device delivers excellent reverse leakage control, maintaining low leakage loss at room temperature. Its reverse characteristics remain stable at 125℃ high temperature with controlled leakage increase, adapting to operating requirements across different ambient temperatures, reducing extra power loss at high temperatures and improving rectification conversion efficiency.

2.4 Integrated Full-Bridge Structure for Simplified Circuit Design

It integrates four rectifier dies into a single package to form a complete single-phase bridge rectification structure, replacing rectifier circuits built with discrete diodes. It effectively reduces component count, saves PCB layout space, lowers design and assembly costs, and improves circuit integration and production consistency.

2.5 Compact SMD Package for Automated Mass Production

Adopting the standard MSB surface-mount package, the device features a compact size and regular pin layout. It is compatible with standard SMT reflow soldering processes and automated pick-and-place equipment, delivering consistent soldering quality and high production efficiency. Suitable for large-scale mass production, it meets the miniaturization and high-density design requirements of modern electronic products.

3. Main Application Fields

With balanced electrical performance and compact SMD package, the MSB30M is widely used in various low and medium-power AC-DC rectification scenarios: low-power switching power supplies, power adapters, LED driving power supplies, small home appliance power boards, battery chargers, consumer electronics rectifier units, industrial auxiliary power supplies, lighting power supply circuits, etc.

4. Engineering Design Guidelines

Thermal Design: Design the thermal scheme based on actual operating current, duty cycle and ambient temperature. Improve heat dissipation capability through PCB copper pour to ensure the device junction temperature stays within a reasonable range and enhance long-term operational reliability. Voltage Margin: It is recommended to reserve an appropriate voltage margin in practical applications, avoid long-term operation close to the rated withstand voltage, and reduce the breakdown risk caused by grid surges. Soldering Process: Compatible with standard reflow soldering processes. Set soldering parameters according to the device’s temperature tolerance specifications; avoid prolonged over-temperature soldering to prevent performance drift and package damage. Load Derating: For capacitive load applications, appropriate derating of forward current is recommended to ensure safe device operation. PCB Layout: Keep AC input and DC output traces as symmetrical as possible to reduce the influence of parasitic parameters and ensure balanced current distribution across each bridge arm.

5. Product Summary

The Slkor MSB30M is a well-balanced 3A 1000V surface-mount single-phase bridge rectifier. It integrates a full-bridge structure and delivers stable current carrying capability, excellent surge tolerance and low leakage characteristics. The compact SMD package supports automated mass production and miniaturized design. It is widely adaptable to various low and medium-power power rectification circuits, serving as a cost-effective rectifier solution that balances reliability and cost for consumer electronics, industrial auxiliary power and other scenarios.

Slkor introduction
According to Song Shiqiang, Slkor Semiconductor (https://www.slkormicro.com) grandly opened its third franchised store in Huaqiangbei on August 14, 2026. The store mainly offers MOSFETs, power-management ICs, Hall elements, optocouplers, IGBTs, SiC silicon-carbide components, AC/DC devices, TVS diodes, Schottky diodes, thyristors and other electronic components.


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