US1M Toshiba

The US1M from Toshiba is a high-reliability surface-mount ultrafast rectifier diode in a compact DO-214AC (SMA) package. This component is engineered for high-efficiency power conversion and circuit protection, featuring an ultrafast reverse recovery time that minimizes switching losses in high-frequency applications. Supplied in reel packaging with a factory pack quantity of 7500, it is optimized for automated assembly lines. Its primary applications include serving as a freewheeling diode in switch-mode power supplies (SMPS), AC/DC converters, and inverter circuits, as well as providing reverse polarity protection and voltage clamping in various electronic systems.

Features

• High Efficiency Switching: Ultrafast reverse recovery time reduces switching losses, enhancing overall power supply efficiency.
• Low Forward Voltage: Minimizes power dissipation and heat generation under normal operating conditions.
• Compact Package: The DO-214AC (SMA) footprint saves valuable PCB space in dense circuit layouts.
• High Surge Current Capability: Withstands high initial current surges, improving circuit reliability and longevity.

Technical Specifications

• Peak Repetitive Reverse Voltage (V_RRM): 1000 V
• Average Forward Output Current (I_O): 1 A
• Forward Voltage (V_F): 1.7 V Max @ I_F = 1 A
• Reverse Recovery Time (t_rr): 75 ns Max
• Operating Junction Temperature (T_J): -65°C to +150°C

Pin Configuration and Functions

• No pin definition: This is a two-terminal passive device with an anode and cathode.

Typical Applications

• Switch-Mode Power Supplies (SMPS): High-frequency rectification in AC/DC converters.
• Power Inverters: Freewheeling and clamp diode functions in motor drive circuits.
• Consumer Electronics: Reverse polarity protection and voltage clamping circuits.

Equivalent / Alternative Parts

• MRA4007T3G (ON Semiconductor): Similar 1000V, 1A ultrafast rectifier in a DO-214AC package.
• ES1J (Vishay / Diodes Inc.): Comparable voltage and current rating with fast recovery characteristics in the same package.

Advantages

• Superior Switching Performance: The ultrafast recovery time is significantly quicker than standard rectifiers, enabling efficient operation in modern high-frequency power circuits.
• Robust Voltage Handling: A high peak reverse voltage of 1000V provides a wide safety margin for line-voltage fluctuations and transient suppression.
• Optimized for Mass Production: Supplied on reels with a high pack quantity, it streamlines the pick-and-place process for large-scale manufacturing.

Limitations

• Current Rating Limit: The 1A average forward current may be insufficient for high-power applications, requiring parallel connection or a larger device.
• Thermal Management Dependency: Maximum performance is contingent on proper PCB layout and heatsinking due to its surface-mount package.

Package Information

DO-214AC (SMA) package (size approximately 4.3×2.6mm), 2 pins, surface mount.

Manufacturer Information

Toshiba is a globally recognized leader in the semiconductor industry, renowned for its high-quality electronic components and discrete semiconductors. The company maintains a strong commitment to innovation and reliability in its product development.

Design-in Tips

• Ensure Adequate Creepage Distance: Maintain proper PCB spacing between the anode and cathode pads to prevent high-voltage arcing, considering the 1000V rating.
• Minimize Parasitic Inductance: Keep the loop area of the high-frequency switching path as small as possible to mitigate voltage spikes and ringing.

Lifecycle Status & PCN/PDN Notes

Lifecycle status information is not provided. No product change notifications (PCN) or product discontinuation notices (PDN) are available from the provided parameters.