LR1F27K4 Equivalent & Substitute Parts

Part Overview

The LR1F27K4 is a 27.4 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 is currently active in production with 1021 units in stock. Substitute parts are identified when the primary part becomes unavailable, when alternative packaging formats are required, or when supply chain optimization necessitates component standardization across equivalent specifications.

Key Parameters

Parameter	Value
Resistance	27.4 kOhms
Tolerance	±1%
Power Rating	0.6W
Composition	Metal Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Package Type	Axial
Number of Terminations	2
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LR1F27K4 is determined by strict equivalence across the following critical parameters:

Resistance Value: 27.4 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power Rating: 0.6W (exact match required)
Composition: Metal Film (exact match required)
Temperature Coefficient: ±50ppm/°C (exact match required)
Operating Temperature Range: -55°C ~ 155°C (exact match required)
Package Configuration: Axial through-hole (exact match required)
Regulatory Compliance: ROHS3 Compliant (minimum requirement)

The MRS25000C2742FRP00 manufactured by Vishay Beyschlag/Draloric/BC Components meets all critical electrical and mechanical parameters. Physical dimensions vary slightly (0.098" Dia x 0.256" L versus 0.091" Dia x 0.244" L), which is acceptable within standard axial resistor tolerance ranges and does not affect electrical performance or board-level compatibility in standard through-hole applications.

Parameter Comparison

Parameter	LR1F27K4 (TE Connectivity)	MRS25000C2742FRP00 (Vishay)	Match Status
Resistance	27.4 kOhms	27.4 kOhms	Equivalent
Tolerance	±1%	±1%	Equivalent
Power Rating	0.6W	0.6W	Equivalent
Composition	Metal Film	Metal Film	Equivalent
Temperature Coefficient	±50ppm/°C	±50ppm/°C	Equivalent
Operating Temperature Range	-55°C ~ 155°C	-55°C ~ 155°C	Equivalent
Package Type	Axial	Axial	Equivalent
Number of Terminations	2	2	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Packaging Format	Tape & Box (TB)	Cut Tape (CT)	Different
Physical Diameter	0.091" (2.30mm)	0.098" (2.50mm)	Within Tolerance
Physical Length	0.244" (6.20mm)	0.256" (6.50mm)	Within Tolerance

Engineering Selection Recommendations

The MRS25000C2742FRP00 is a direct electrical equivalent to the LR1F27K4 and is suitable for substitution in applications where the LR1F27K4 is specified. Both components are active products with ROHS3 compliance and identical electrical performance characteristics across the full operating temperature range.

Selection between the primary part and substitute should be based on:

Availability: The MRS25000C2742FRP00 has higher inventory availability (5966 units in stock versus 1021 units).
Packaging Requirements: The LR1F27K4 is supplied in Tape & Box format, while the MRS25000C2742FRP00 is supplied in Cut Tape format. Packaging selection depends on assembly process requirements and volume specifications.
Supply Chain Continuity: Either part may be selected based on supplier lead times and long-term availability forecasts.

Physical dimension variations are within standard axial resistor manufacturing tolerances and do not impact PCB layout or electrical performance in standard through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the MRS25000C2742FRP00 be used as a direct replacement for the LR1F27K4?

A: Yes. Both components have identical electrical specifications: 27.4 kOhms ±1% resistance, 0.6W power rating, metal film composition, ±50ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Both are ROHS3 compliant and rated for two-terminal axial through-hole applications.

Q: What is the difference between Tape & Box and Cut Tape packaging?

A: Tape & Box (TB) packaging supplies components on tape with a protective box for storage and handling. Cut Tape (CT) packaging supplies components on tape without the box. Both formats are suitable for automated assembly equipment. Selection depends on assembly process requirements and inventory management practices.

Q: Are the physical dimension differences significant?

A: No. The LR1F27K4 measures 0.091" diameter × 0.244" length, while the MRS25000C2742FRP00 measures 0.098" diameter × 0.256" length. These variations fall within standard axial resistor manufacturing tolerances and do not affect PCB hole spacing, lead-to-lead distance, or electrical performance in standard through-hole designs.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the LR1F27K4 and MRS25000C2742FRP00 are ROHS3 compliant. Both carry EAR99 ECCN classification and are classified under HTSUS 8533.21.0090. The MRS25000C2742FRP00 carries REACH Unaffected status.

Q: Which part should be selected for new designs?

A: Either part is acceptable for new designs. Selection should be based on supplier availability, packaging format requirements, and supply chain strategy. Both components provide equivalent electrical performance and regulatory compliance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message