SS54 40V 5A Schottky Power Diode SMA DO-214AC

SS54 40V 5A Schottky Power Diode SMA DO-214AC is a high-efficiency power rectifier designed for demanding switching applications where minimal power loss is critical. This diode features a Schottky barrier structure, consequently delivering a very low forward voltage drop, which significantly enhances system efficiency compared to standard PN junction diodes. With a current rating of 5A and a reverse voltage rating of 40V, the SS54 provides robust performance in compact circuits. Furthermore, its low reverse recovery time makes it an excellent choice for high-frequency switch-mode power supplies (SMPS) and DC-DC converters. The Surface Mount Appliance (SMA/DO-214AC) package allows engineers to integrate the SS54 into modern, space-constrained electronic designs, making it ideal for portable devices and consumer electronics.

Key Features:

• Low Forward Voltage Drop (V_F): The Schottky barrier design minimizes power dissipation, maximizing overall circuit efficiency.
• High Current Capability: Handles a substantial average rectified current of 5.0 A, providing ample power handling for many medium-power applications.
• Fast Switching Speed: Achieves virtually instantaneous reverse recovery time, which is essential for high-frequency switching circuits.
• Low Power Loss: Consequently, the low V_F reduces heat generation, simplifying thermal management requirements in the design.
• Surface Mount Package: The compact SMA (DO-214AC) package enables high-density board design and automated assembly processes.

Technical Specifications:

• Maximum DC Blocking Voltage (V_R): 40 V
• Average Rectified Forward Current (I_FAV): 5.0 A
• Maximum Forward Voltage (V_F): Typically 0.5 V at 5 A
• Maximum Reverse Current (I_R): Typically 0.5 mA at 40 V
• Operating Junction Temperature (T_J): −55°C to +150°C
• Reverse Recovery Time (t_rr): Very fast (Essentially zero for Schottky diodes)

Mechanical Specifications:

• Package Style: SMA (DO-214AC)
• Mounting: Surface Mount Device (SMD)
• Weight: ≈ 0.07 g (Extremely lightweight)
• Moisture Sensitivity Level (MSL): MSL 1 (Unlimited floor life at ≤ 30°C / 85% RH)

Dimensions:

• Length (A): ≈ 4.0 mm
• Width (B): ≈ 2.6 mm
• Height (C): ≈ 2.0 mm
• Pad Dimensions (Suggested): Refer to the specific manufacturer’s datasheet for accurate land pattern recommendations.

Pinout and Wiring:

• Band End (Cathode): The marked band (line) on the body indicates the cathode (−). Connect this side to the lower potential or output side.
• Unmarked End (Anode): The opposite end of the band is the anode (+). Connect this side to the higher potential or input side.
• Wiring Note: Therefore, ensure you solder the diode with the cathode band facing the direction of conventional current flow output during rectification.

Datasheet Reference:

• Download Vishay SS54 Schottky Diode Datasheet

Commonly Used in:

• Switch-Mode Power Supplies (SMPS): Provides high-speed rectification in low-voltage output stages.
• DC-DC Converters: Functions as a freewheeling diode or rectification diode in boost and buck converter topologies.
• Reverse Polarity Protection: Protects circuits from accidental polarity reversal while incurring minimal voltage drop.

Applications:

• Portable Consumer Electronics: Ideal for power management in smartphones, tablets, and wearable technology.
• High-Frequency Inverters: Rectifies high-speed output signals efficiently.
• Solar Panel Bypass Diodes: Moreover, the low V_F makes it suitable for use as bypass diodes in low-power solar charging circuits.
• Automotive Electronics: Provides efficient rectification and protection in 12V automotive systems.

Equivalent Models:

• SK54: A widely used cross-reference for the SS54 with identical electrical specifications in the SMA package.
• MBR540: A similar 5A, 40V Schottky diode, however, check the specific package (often DO-201AD or SMA is available) before substitution.
• B540C-13-F: A Diodes Incorporated alternative that offers equivalent performance and packaging.

Package Includes:

• 1 x SS54 40V 5A Schottky Power Diode SMA DO-214AC