170M6251: Features, Alternatives, and Characteristics
2025-01-09 179

The Eaton 170M6251 fuse is designed for quick protection of important electronics like semiconductors. It's perfect for systems that need reliable performance, like battery chargers and power converters. This article looks at the features, benefits, and details of the 170M6251 fuse, showing why it's so basic for keeping electronic systems running smoothly and safely.

Catalog

170M6251 Overview

The Eaton 170M6251 fuse, from Eaton's Bussmann series, is developed for high-speed protection of semiconductors across a range of applications. This square-body fuse is best for deployment in systems such as converters/rectifiers, battery chargers, and DC common buses, where reliable operation is required. It is specifically designed to safeguard against short circuits, promoting consistent and safe functionality in power electronics. This fuse ensures that your equipment operates without interruption, minimizing downtime and maintaining efficiency.

If you are looking to secure bulk orders, the 170M6251 offers dependable protection developed for high-demand environments.

Performance Rating

Parameter	Specification
Volts	1250Vac (IEC)
	1300Vac (UL)
Amps	50-1400A
IR	100kA RMS Sym.

170M6251 Dimension

Size	A (mm)	B (mm)	D (mm)	E (mm)	H (mm)
1"	80	138	58	45	20
1	80	138	66	53	25
2	80	138	75	61	25
3	81	139	90	76	30
Note: 1mm = 0.0394” / 1” = 25.4mm

170M6251 Alternatives

KRP-C Series:

• KRP-C-800SP

• KRP-C-1200SP

• KRP-C-1600SP

LPS-RK_SP and LPN-RK_SP Series:

• LPS-RK-600SP

• LPN-RK-500SP

AJT Series:

• AJT50

• AJT100

• AJT150

170M6251 Features and Benefits

Excellent DC Performance

The 170M6251 fuse is optimal for DC applications and required for systems requiring stability and reliability, majorly in power electronics like battery chargers and solar inverters.

Low Arc Voltage and Low Energy Let-Through (I2t)

This fuse reduces arc voltage and energy let-through, increasing safety by limiting damage during faults, and quickly clearing them while protecting components from excessive energy exposure.

Low Watts Loss

Developed for efficiency, the 170M6251 operates with minimal energy dissipation, saving energy and reducing system thermal load which enhances the longevity of components.

Superior Cycling Capability

The fuse can withstand frequent on-off cycles without losing performance, best for applications with variable electrical loads. This ensures reliable protection and durability.

170M6251 Main Applications

DC Common Bus

The 170M6251 fuse is best suited for DC common bus applications, providing robust overcurrent protection. This setup connects multiple DC devices that share a common power supply, enhancing system stability and reducing wiring complexity.

DC Drives

In DC drive systems, the 170M6251 is required to protect the drive from potential short circuits and overload conditions. This ensures the longevity and reliability of motor controllers and speed control systems that operate in industrial environments.

Power Converters/Rectifiers

This fuse plays a basic role in power converters and rectifiers by safeguarding semiconductor devices from overcurrent scenarios. It helps maintain the efficiency and operational integrity of systems that convert AC to DC, or vice versa, especially in high-power applications.

Reduced Voltage Starters

For reduced voltage starters, the 170M6251 protects during the start-up phase of motors. It limits the initial surge current, allowing for a smoother and safer start, prolonging motor life, and reducing mechanical stress.

170M6251 Electrical Characteristics

The graphs provided depict the electrical characteristics of the 170M6251 fuse, essential for understanding its performance in various applications:

• Total Clearing I2t (Left Graph): This graph shows the total clearing I2t, which is a measure of the energy let through by the fuse during its operation until it clears the circuit. The x-axis represents the prospective fault current in amperes squared seconds (A²s), and the y-axis shows the total clearing I2t in kiloampere squared seconds (kA²s). The curve indicates that as the prospective fault current increases, the total clearing I2t also increases, suggesting that the fuse can handle higher energy levels before clearing the fault.

• Arc Voltage (Middle Graph): The arc voltage graph illustrates how the voltage drop across the fuse, labeled as UL, varies with increasing fault current (labeled Ie on the x-axis). The voltage drop increases with the fault current, depicted by the upward trend in the curve. This characteristic is required for assessing the voltage stress on other components in the circuit during a fault condition.

• Power Losses (Right Graph): The third graph shows the power losses associated with the fuse as a function of the load current, represented as a percentage of the rated current (I_b). The power losses increase significantly as the current approaches and exceeds the rated capacity of the fuse. This information is basic for thermal management and efficiency calculations in systems where the fuse is deployed.

170M6251 Schematic Drawing

• Top View (Center Diagram): This view shows the top layout of the component, marked with key measurements, notably dimension 'B' which spans the entire length. A central symbol, possibly indicating an operational or functional area like a vent or indicator, is marked at the center.

• Side View (Left Diagram): This illustration depicts the side profile of the component. It highlights two distinct sections with respective dimensions labeled 'D' and 'E', suggesting different functional zones or attachment areas that are basic for installation.

• Frontal View (Right Diagram): The front view displays the component with dimensions 'A' for width and 'C' for height, providing a clear indication of the physical size necessary for accommodating the component in a system setup. The representation also includes a detail view (plus symbol) at the bottom, which might signify a point of interest such as a mounting hole or electrical connection point.

Conclusion

This review of the Eaton 170M6251 fuse underlines its basic role in protecting electronic systems and keeping them running efficiently. With features like low energy loss and strong protection against power issues, the 170M6251 is basic for any high-demand electrical setup. We encourage you to consider the advantages of using the 170M6251 fuse. Buying in bulk can help ensure your systems are safe and efficient.

Datasheet PDF

170M6251 Datasheets:

170M6251 Details PDF

170M6251 PDF - DE.pdf