LR1F4K99 Equivalent & Substitute Parts

Part Overview

The LR1F4K99 is a 4.99 kOhms ±1% 0.6W through-hole resistor manufactured by TE Connectivity Passive Product in the Neohm series. This axial metal film resistor operates across a temperature range of -55°C to 155°C with a temperature coefficient of ±50ppm/°C. The component is ROHS3 compliant and maintains active product status. Substitute parts are identified to provide alternative sourcing options with equivalent electrical and mechanical specifications.

Substiute Parts

LR1F4K99

TE Connectivity Passive ProductIn Stock: 847LR1F4K99 Datasheet

Current PartRFQ

MRS25000C4991FC100

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1801MRS25000C4991FC100 Datasheet

DirectRFQ

MRS25000C4991FRP00

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 9593MRS25000C4991FRP00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LR1F4K99 is determined by matching the following critical parameters:

• Resistance value: 4.99 kOhms
• Tolerance: ±1%
• Power rating: 0.6W
• Composition: Metal Film
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Package configuration: Axial
• Number of terminations: 2

The substitute parts MRS25000C4991FC100 and MRS25000C4991FRP00 satisfy all electrical and mechanical requirements. Both are manufactured by Vishay Beyschlag/Draloric/BC Components in the MRS25 series and maintain identical resistance, tolerance, power rating, composition, temperature coefficient, and operating temperature specifications. The primary distinction between substitute parts relates to packaging format: MRS25000C4991FC100 is supplied in Cut Tape (CT) format, while MRS25000C4991FRP00 is supplied in Tape & Reel (TR) format. The original LR1F4K99 is packaged in Tape & Box (TB) format.

Parameter Comparison

Engineering Selection Recommendations

All three components maintain active product status and ROHS3 compliance, confirming ongoing availability and regulatory alignment. The electrical specifications are identical across all parts, ensuring functional equivalence in circuit applications.

Selection between the LR1F4K99 and its substitutes should be based on packaging requirements and supply chain considerations. The MRS25000C4991FC100 (Cut Tape format) accommodates manual assembly and small-quantity applications. The MRS25000C4991FRP00 (Tape & Reel format) supports automated assembly processes and high-volume production environments. The original LR1F4K99 (Tape & Box format) provides an alternative packaging option for specific procurement workflows.

Physical dimensions vary slightly between the TE Connectivity component (2.30mm diameter × 6.20mm length) and the Vishay components (2.50mm diameter × 6.50mm length). This dimensional difference must be evaluated against PCB layout constraints and mechanical clearance requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can MRS25000C4991FC100 and MRS25000C4991FRP00 be used interchangeably with LR1F4K99?

A: Yes. Both Vishay components satisfy all electrical specifications: 4.99 kOhms resistance, ±1% tolerance, 0.6W power rating, metal film composition, ±50ppm/°C temperature coefficient, and -55°C to 155°C operating range. The primary difference is packaging format (Cut Tape versus Tape & Reel), which affects procurement and assembly processes rather than electrical performance.

Q: What is the significance of the packaging format differences?

A: Packaging format determines supply method and assembly compatibility. Cut Tape (CT) format is suitable for manual assembly and small-quantity orders. Tape & Reel (TR) format is optimized for automated pick-and-place assembly in high-volume manufacturing. Tape & Box (TB) format provides an alternative supply configuration. All formats contain identical components.

Q: Are there physical size considerations when substituting parts?

A: Yes. The LR1F4K99 measures 2.30mm diameter × 6.20mm length, while both Vishay substitutes measure 2.50mm diameter × 6.50mm length. This 0.2mm increase in diameter and 0.3mm increase in length must be verified against PCB layout, component spacing, and mechanical clearance requirements before implementation.

Q: Do all parts meet the same compliance standards?

A: Yes. The LR1F4K99, MRS25000C4991FC100, and MRS25000C4991FRP00 are all ROHS3 compliant and classified under ECCN EAR99 with HTSUS code 8533.21.0090. Moisture sensitivity is not applicable to any of these components.

Q: What is the temperature coefficient specification and why does it matter?

A: All three components have a temperature coefficient of ±50ppm/°C, meaning the resistance value changes by a maximum of 50 parts per million for each degree Celsius change in operating temperature. This specification is critical for precision analog circuits and temperature-sensitive applications where resistance stability is required.