LR1F133K Equivalent & Substitute Parts

Part Overview

The LR1F133K is a 133 kOhms ±1% 0.6W through-hole resistor manufactured by TE Connectivity Passive Product in the Neohm series. This axial metal film resistor is designed for general-purpose applications requiring precision resistance values with tight tolerance specifications. The part maintains Active product status with 874 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to supply constraints, procurement lead times, or design flexibility needs.

Substiute Parts

LR1F133K

TE Connectivity Passive ProductIn Stock: 974LR1F133K Datasheet

Current PartRFQ

MRS25000C1333FCT00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 12250MRS25000C1333FCT00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR1F133K is permissible when the replacement component maintains the following critical parameters:

• Resistance value of 133 kOhms
• Tolerance of ±1%
• Power rating of 0.6W
• Metal film composition
• Temperature coefficient of ±50ppm/°C
• Operating temperature range of -55°C ~ 155°C
• Axial package configuration with 2 terminations
• ROHS3 compliance status

The MRS25000C1333FCT00 from Vishay Beyschlag/Draloric/BC Components satisfies all substitution criteria. Physical dimensions vary slightly between the main part and substitute, with the substitute measuring 0.098" diameter × 0.256" length compared to the main part's 0.091" diameter × 0.244" length. Both components are compatible within standard through-hole PCB mounting tolerances for axial resistors.

Parameter Comparison

Engineering Selection Recommendations

Both the LR1F133K and MRS25000C1333FCT00 are Active product status components with full ROHS3 compliance and identical electrical specifications. Selection between these parts is based on availability and packaging format. The LR1F133K is supplied in Tape & Box (TB) packaging with 874 units in stock, while the MRS25000C1333FCT00 is supplied in Cut Tape (CT) packaging with 12,233 units in stock. The substitute part offers higher inventory availability for applications requiring extended lead time mitigation. Both components carry EAR99 export classification and are subject to identical HTSUS tariff codes, indicating equivalent regulatory treatment. The minor dimensional variation between parts (0.007" diameter difference and 0.012" length difference) remains within standard PCB through-hole mounting tolerances for axial resistor footprints.

Frequently Asked Questions (FAQ)

Q: Can the MRS25000C1333FCT00 be used as a direct replacement for the LR1F133K?

A: Yes. Both components share identical electrical specifications including 133 kOhms resistance, ±1% tolerance, 0.6W power rating, ±50ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The axial package configuration and 2-termination design are identical. Physical dimensions differ slightly but remain compatible with standard through-hole PCB mounting.

Q: What is the difference in packaging between these two parts?

A: The LR1F133K is supplied in Tape & Box (TB) format, while the MRS25000C1333FCT00 is supplied in Cut Tape (CT) format. Both are suitable for automated assembly processes. The choice between packaging formats depends on production line equipment and inventory management requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the LR1F133K and MRS25000C1333FCT00 are ROHS3 compliant. The LR1F133K lists REACH status as Vendor Undefined, while the MRS25000C1333FCT00 lists REACH status as REACH Unaffected. Both components carry identical EAR99 export classification.

Q: Do the dimensional differences affect PCB layout?

A: The dimensional differences are minimal. The MRS25000C1333FCT00 measures 0.098" diameter × 0.256" length compared to the LR1F133K's 0.091" diameter × 0.244" length. These variations fall within standard manufacturing tolerances for axial resistor footprints and do not require PCB redesign.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain requirements and packaging preferences. Both parts are Active status with full compliance certifications. The MRS25000C1333FCT00 offers higher inventory availability (12,233 units versus 874 units), making it suitable for applications with extended production runs or supply chain risk mitigation strategies.