825FR50 Wirewound Chassis Mount Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 825FR50 is a 500 mOhms ±1% 25W wirewound chassis mount resistor designed for high-power applications requiring precision current sensing and load balancing. This part is classified as obsolete, making identification of compatible alternatives essential for ongoing production support and system maintenance. The 825FR50E represents the active production equivalent with identical electrical and mechanical specifications.

Substiute Parts

825FR50

OhmiteIn Stock: 1192825FR50 Datasheet

Current PartRFQ

825FR50E

OhmiteIn Stock: 692825FR50E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 825FR50E qualifies as a direct substitute based on identical electrical parameters: 500 mOhms resistance, ±1% tolerance, 25W power rating, ±90ppm/°C temperature coefficient, and -55°C to 275°C operating range. Mechanical compatibility is confirmed through matching aluminum housing, flange mounting, solder lug leads, and identical physical dimensions (1.062" L × 1.094" W, 0.556" height). The substitution is valid across all applications where the 825FR50 was specified, with the primary distinction being packaging format and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The 825FR50E is the direct functional replacement for the obsolete 825FR50. Both parts share identical electrical performance and mechanical form factor, ensuring drop-in compatibility in existing designs. The 825FR50E offers the advantage of active production status and ROHS3 compliance, making it the preferred choice for new designs and ongoing production requirements. The transition from bulk to tray packaging in the 825FR50E reflects standard manufacturing practices for active components. Both parts maintain REACH Unaffected and EAR99 export classification status.

Frequently Asked Questions (FAQ)

Q: Can the 825FR50E directly replace the 825FR50 in existing assemblies? A: Yes. The 825FR50E provides identical electrical specifications (500 mOhms ±1%, 25W, ±90ppm/°C) and mechanical dimensions (1.062" × 1.094" × 0.556"), enabling direct substitution without circuit redesign or PCB modification.

Q: What is the primary difference between these two part numbers? A: The 825FR50 is obsolete and supplied in bulk packaging, while the 825FR50E is in active production with tray packaging. The 825FR50E also carries ROHS3 compliance certification, whereas the 825FR50 is RoHS non-compliant.

Q: Are there any thermal or performance differences between the two parts? A: No. Both parts operate across -55°C to 275°C with identical ±90ppm/°C temperature coefficient, ensuring equivalent thermal performance and stability in all operating conditions.

Q: Does packaging format affect electrical or mechanical performance? A: No. Bulk and tray packaging formats do not affect component performance. The difference is administrative, relating to order quantities and handling procedures.

Q: Is the 825FR50E suitable for new product designs? A: Yes. The 825FR50E is the recommended choice for new designs due to active production status and ROHS3 compliance, ensuring long-term supply availability and regulatory alignment.