The LM75-23B55 is a high-power, 74.8W (nominally 75W) AC-DC Switch Mode Power Supply (SMPS), part of the LM75-23Bxx series, housed in a small outline metal case. This power supply is engineered to provide a highly stable, efficient, and robust 55V power solution, making it an essential component for specialized industrial control systems, telecommunications equipment, and other applications requiring a non-standard 55V power rail.

A defining characteristic is its universal and ultra-wide input voltage range of 85 ~ 305VAC and 120 ~ 430VDC. This extensive input capability ensures true global compatibility and provides exceptional tolerance to input voltage fluctuations, guaranteeing reliable operation even in unstable power environments. The unit delivers a single, regulated output of 55VDC with a current capacity of 1.36 Amperes, offering powerful and consistent energy to connected loads.

The LM75-23B55 is built for reliability and safety in harsh conditions. It operates effectively across a wide ambient temperature range of -30 to +70 . It features low standby power consumption and high efficiency, which minimizes energy waste and heat generation. Safety is ensured by a high I/O isolation test voltage of 4000VAC and compliance with major international safety and EMC standards. The power supply utilizes terminal block termination for secure and straightforward installation. Integrated protection circuits, including output short circuit, over-current, and over-voltage protection, safeguard both the power supply and the critical equipment it powers.

Key Features:

• Universal & Ultra-Wide Input: Accepts 85-305VAC or 120-430VDC, ensuring global operation and high input tolerance.
• Small Outline Metal Case: Provides robust mechanical protection and aids in effective thermal management.
• High Power Density: Delivers 74.8W (55VDC @ 1.36A) in a compact form factor.
• Wide Operating Temperature: Functions reliably from -30 to +70 .
• High Isolation: 4000VAC I/O isolation test voltage for enhanced safety and noise immunity.
• Low Standby Power & High Efficiency: Optimized for energy savings and reduced heat.
• Robust Protection: Includes output short circuit, over-current, and over-voltage protection.
• Terminal Block Termination: Facilitates secure and easy wiring connections.
• High Altitude Operation: Certified for reliable operation up to 5000m altitude.

Specifications:

• Device Type: Power Supply
• Type: Metal Case, Small Outline, Switch Mode
• Output Power: 74.8W
• Output Voltage: 55VDC
• Output Current: 1.36A
• Input Voltage Range: 85 ~ 305VAC / 120 ~ 430VDC
• I/O Isolation: 4000VAC
• Working Temperature: -30 to +70
• Protection: Output Short Circuit, Over-Current, Over-Voltage
• Termination: Terminal Block (Implied)
• Safety Compliance: Over-voltage class (designed to meet EN61558)

The LM75-23B55 is a premium, high-voltage power solution for engineers requiring a durable, safe, and globally compliant power supply for demanding commercial and industrial applications.

What's in the box
1 x LM75-23B55: 75W Metal Case PS, 55VDC @ 1.36A, Ultra-Wide Input