In power electronic circuits such as switching power supplies, power adapters, home appliance control boards and LED drivers, rectifier diodes perform the core function of AC-to-DC conversion, and surface-mount devices are increasingly advantageous for product miniaturization and automated mass production. The Slkor S2M is a surface-mount general-purpose silicon rectifier diode in an SMA package. Featuring a glass passivated chip junction, it delivers a maximum repetitive peak reverse voltage of 1000V and an average forward rectified current of 2A. With low reverse leakage, high surge withstand capability and RoHS-compliant lead-free construction, it supports high-density SMT production and serves as a highly reliable domestic device solution for low and medium-power rectification scenarios.

1. Core Product Parameters

1. Device Type: Surface-mount general-purpose silicon rectifier diode
2. Maximum Repetitive Peak Reverse Voltage (VRRM): 1000V
3. Maximum DC Blocking Voltage (VDC): 1000V
4. Maximum Average Forward Rectified Current (IF(AV)): 2A
5. Peak Forward Surge Current (IFSM, 8.3ms single half-sine wave): 50A
6. Forward Voltage (VF, @2A): 1.1V
7. DC Reverse Current (IR, @25°C rated voltage): 5μA
8. Typical Junction Capacitance (CJ): 25pF
9. Thermal Resistance (RθJA): 65°C/W
10. Operating Junction and Storage Temperature Range: -55℃ ~ +150℃
11. Package: SMA surface-mount plastic package

2. Core Product Advantages

2.1 Glass Passivated Chip Junction for Stable and Reliable Performance

Adopting glass passivated chip junction technology, the device optimizes reverse characteristics and high-temperature stability. It delivers excellent reverse leakage control, reduces performance drift during long-term operation, improves continuous operational reliability, and is suitable for rectification applications with extended power-on time.

2.2 1000V Withstand Voltage and 2A Current Rating Cover Mainstream Rectification Needs

With a 1000V repetitive peak reverse voltage and 2A average forward rectified current, it meets the bridge rectification and single-diode rectification requirements of most low and medium-power offline power supplies and adapters. It adapts to high-voltage rectification conditions on the AC input side and applies to a wide range of scenarios.

2.3 High Surge Withstand Capability Against Startup Inrush

It supports a peak forward surge current of up to 50A under 8.3ms single half-sine wave conditions, withstanding inrush current at power-on, reducing the risk of device damage caused by startup current spikes, and improving the long-term durability of the overall system.

2.4 SMA Low-Profile SMD Package for Automated Mass Production

The SMA low-profile surface-mount package features a compact footprint, saves PCB layout space and supports high-density circuit design. The device form factor facilitates pick-and-place assembly, is compatible with standard SMT reflow soldering processes, and complies with EU RoHS Directive 2011/65/EU for lead-free construction, making it suitable for large-scale automated production.

2.5 Wide Temperature Range for Strong Environmental Adaptability

Supporting an operating junction temperature range from -55℃ to +150℃, it adapts to temperature fluctuations across different regions and working conditions, meets the demands of both low-temperature startup and high-temperature full-load operation, and operates stably in consumer electronics, industrial auxiliary power and various other scenarios.

3. Main Application Fields

With balanced electrical performance and reliable SMD package quality, the S2M is widely used in various low and medium-power rectification scenarios: switching power supplies, AC/DC power adapters, battery chargers, LED driving power supplies, home appliance control board rectifier units, small appliance power modules, input rectification for industrial auxiliary power supplies, signal rectification circuits, and front-end rectification for inverters.

4. Engineering Design Guidelines

Soldering Process: Compatible with standard reflow soldering processes. Set soldering parameters according to the device’s temperature tolerance; avoid prolonged over-temperature soldering to prevent performance drift and package damage. Voltage Margin: It is recommended to reserve a reasonable voltage margin in practical applications, avoid long-term operation close to the rated withstand voltage, and reduce the breakdown risk caused by surge voltage. Thermal Design: Design the thermal scheme based on actual operating current, duty cycle and ambient temperature to ensure the device junction temperature stays within the specified range and improve long-term operational stability. Load Derating: For capacitive load applications, a 20% derating of forward current is recommended to ensure safe device operation. PCB Layout: Design PCB land patterns according to the recommended pad dimensions to ensure soldering reliability and device heat dissipation performance.

5. Product Summary

The Slkor S2M is a 1000V 2A surface-mount general-purpose silicon rectifier diode in an SMA package. It adopts glass passivated chip junction technology, delivering stable reverse characteristics, high surge withstand capability and wide-temperature performance. The low-profile SMD package supports automated mass production and meets RoHS environmental requirements. With balanced parameters and mature technology, it is widely adaptable to various low and medium-power power supply and rectification circuits, serving as a high-quality domestic device choice that balances reliability and cost for surface-mount rectification applications.

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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