RN55E4991FRE6 Equivalent & Substitute Parts

Part Overview

The RN55E4991FRE6 is a 4.99 kOhms ±1% metal film axial through-hole resistor rated at 0.125W (1/8W) manufactured by Vishay Dale. This component is part of the military-grade RN55 series, featuring flame retardant coating, moisture resistance, and safety certification. The part is currently active in production with 683 units in stock. Substitute parts are identified to address packaging availability, tolerance upgrades, and inventory requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

RN55E4991FRE6

Vishay DaleIn Stock: 699RN55E4991FRE6 Datasheet

Current PartRFQ

RN55E4991BB14

Vishay DaleIn Stock: 823RN55E4991BB14 Datasheet

UpgradeRFQ

RN55E4991BRE6

Vishay DaleIn Stock: 1560RN55E4991BRE6 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RN55E4991FRE6 are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain identical resistance value (4.99 kOhms), power rating (0.125W), temperature coefficient (±25ppm/°C), and operating temperature range (-65°C to 175°C). These parameters are non-negotiable for functional equivalence.

Mechanical Compatibility: All substitute parts share the same axial package configuration, physical dimensions (0.090" Dia x 0.240" L), and two-termination design, ensuring direct board-level compatibility.

Series & Certification: All parts belong to the military-grade RN55 series and comply with MIL-R-10509/7 specification, maintaining military-grade performance standards.

Tolerance Upgrade: Substitute parts RN55E4991BB14 and RN55E4991BRE6 offer improved tolerance of ±0.1% compared to the main part's ±1%, providing higher precision while remaining electrically and mechanically interchangeable.

Packaging Variation: Substitutes differ only in packaging format (Bulk or Cut Tape) rather than component specifications, allowing selection based on procurement and assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

RN55E4991BB14 (Bulk Packaging): This substitute provides tolerance upgrade to ±0.1% with bulk packaging format. Selection is appropriate for high-volume assembly operations where tape & reel handling is not required. Active product status and higher inventory (812 units) support consistent supply.

RN55E4991BRE6 (Cut Tape Packaging): This substitute offers tolerance upgrade to ±0.1% with cut tape packaging, suitable for mixed-component assembly or lower-volume production runs. Highest inventory availability (1515 units) ensures supply continuity. Cut tape format provides flexibility between bulk and reel-based assembly processes.

RN55E4991FRE6 (Original Tape & Reel): Maintains ±1% tolerance with tape & reel packaging optimized for automated high-speed assembly. Selection is appropriate when original tolerance specification is sufficient and reel-based handling is preferred.

All three parts maintain identical electrical performance, mechanical compatibility, military-grade certification, and operating characteristics. Selection should be based on packaging requirements, tolerance precision needs, and assembly process compatibility rather than functional differences.

Frequently Asked Questions (FAQ)

Q: Can RN55E4991BB14 or RN55E4991BRE6 be used as direct replacements for RN55E4991FRE6?

A: Yes. Both substitute parts are electrically and mechanically equivalent. They maintain identical resistance value, power rating, temperature coefficient, operating temperature range, physical dimensions, and axial package configuration. The primary differences are packaging format (Bulk or Cut Tape versus Tape & Reel) and tolerance specification (±0.1% versus ±1%).

Q: What is the difference between Tape & Reel, Cut Tape, and Bulk packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, optimized for automated pick-and-place assembly. Cut Tape (CT) packaging provides components on cut sections of carrier tape, suitable for mixed-component assembly or lower-volume production. Bulk packaging supplies loose components, typically for manual assembly or high-volume operations where tape handling is not required. All three formats contain identical components.

Q: Does the tolerance upgrade from ±1% to ±0.1% affect circuit performance?

A: The tolerance upgrade provides tighter resistance value control. In circuits where resistance precision is critical, the ±0.1% tolerance of RN55E4991BB14 and RN55E4991BRE6 delivers improved accuracy. In applications where ±1% tolerance is acceptable, all three parts perform identically.

Q: Are all three parts military-grade components?

A: Yes. All three parts comply with MIL-R-10509/7 specification and belong to the military-grade RN55 series. All feature flame retardant coating, moisture resistance, and safety certification suitable for military and aerospace applications.

Q: Which substitute should be selected for automated assembly?

A: RN55E4991FRE6 (Tape & Reel) and RN55E4991BRE6 (Cut Tape) are both suitable for automated assembly. Tape & Reel format is optimized for high-speed continuous assembly, while Cut Tape provides flexibility for mixed-component or lower-volume automated processes. RN55E4991BB14 (Bulk) is typically used for manual assembly or specialized handling.

Q: Are there any compliance or certification differences between the three parts?

A: No. All three parts share identical RoHS status (non-compliant), REACH status (REACH Affected), ECCN (EAR99), and HTSUS classification (8533.21.0090). Compliance and certification profiles are identical across all substitutes.