Equivalent & Substitute Parts for RN55D7501FBSL

Part Overview

The RN55D7501FBSL is a 7.5 kOhms ±1% metal film axial 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 per MIL-R-10509/7. The part is currently active in production with 615 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

RN55D7501FBSL

Vishay DaleIn Stock: 695RN55D7501FBSL Datasheet

Current PartRFQ

RN55C7501BB14

Vishay DaleIn Stock: 1213RN55C7501BB14 Datasheet

UpgradeRFQ

RN55C7501FB14

Vishay DaleIn Stock: 1022RN55C7501FB14 Datasheet

UpgradeRFQ

RN55D7501FB14

Vishay DaleIn Stock: 6911RN55D7501FB14 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN55D7501FBSL is determined by the following critical parameters:

• Resistance Value: Must be 7.5 kOhms
• Power Rating: Must be 0.125W (1/8W)
• Package Type: Must be Axial
• Physical Dimensions: Must be 0.090" Dia x 0.240" L (2.29mm x 6.10mm)
• Series Compliance: Must belong to RN55 military series per MIL-R-10509/7
• Composition: Must be Metal Film
• Operating Temperature Range: Must support -65°C to 175°C

Tolerance and temperature coefficient variations are permitted within the RN55 series specification, as these parameters do not affect mechanical fit or basic functional compatibility. Substitute parts are classified as follows:

Upgrade Substitutes: Parts with improved tolerance specifications (±0.1% vs ±1%) and lower temperature coefficients (±50ppm/°C vs ±100ppm/°C) that maintain full backward compatibility.

Parametric Equivalents: Parts with identical electrical specifications and tolerance but different temperature coefficient characteristics, suitable for applications where thermal stability requirements differ.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and are manufactured by Vishay Dale within the RN55 military series. Selection criteria are based on the following factors:

RN55C7501BB14: Select this upgrade substitute when circuit design requires enhanced tolerance performance (±0.1%) and improved temperature stability (±50ppm/°C). This part provides superior precision characteristics while maintaining identical mechanical and thermal operating parameters. Highest inventory availability at 1143 units supports procurement reliability.

RN55C7501FB14: Select this upgrade substitute when tolerance improvement (±1% to ±1% maintained) and temperature coefficient reduction (±100ppm/°C to ±50ppm/°C) are required without changing the tolerance specification. This part offers thermal performance enhancement with 940 units in stock.

RN55D7501FB14: Select this parametric equivalent when the original RN55D7501FBSL specification must be maintained exactly, including the ±100ppm/°C temperature coefficient. This part provides the highest inventory availability at 6822 units, supporting high-volume procurement and long-term supply chain continuity.

All parts comply with RoHS non-compliant status, REACH affected designation, and ECCN EAR99 classification consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can RN55C7501BB14 be used as a direct replacement for RN55D7501FBSL?

A: Yes. RN55C7501BB14 is mechanically and electrically compatible. It maintains identical resistance value, power rating, package type, and physical dimensions. The improved tolerance (±0.1% vs ±1%) and lower temperature coefficient (±50ppm/°C vs ±100ppm/°C) represent performance enhancements that do not compromise backward compatibility.

Q: What is the difference between RN55C7501FB14 and RN55C7501BB14?

A: Both parts share identical tolerance (±1%), power rating (0.125W), and temperature coefficient (±50ppm/°C). The primary distinction is in tolerance specification: RN55C7501BB14 offers ±0.1% tolerance, while RN55C7501FB14 maintains ±1% tolerance. Selection depends on circuit precision requirements.

Q: Is RN55D7501FB14 identical to the main part RN55D7501FBSL?

A: RN55D7501FB14 is a parametric equivalent with identical electrical specifications: 7.5 kOhms ±1% resistance, 0.125W power rating, and ±100ppm/°C temperature coefficient. Both parts are mechanically and functionally interchangeable. The primary advantage of RN55D7501FB14 is significantly higher inventory availability (6822 units vs 615 units).

Q: Are all substitute parts suitable for military applications?

A: Yes. All listed substitute parts belong to the RN55 military series and comply with MIL-R-10509/7 specification. All parts feature flame retardant coating, moisture resistance, and safety certification consistent with military-grade requirements.

Q: Do substitute parts maintain the same physical footprint?

A: Yes. All substitute parts share identical axial package dimensions of 0.090" Dia x 0.240" L (2.29mm x 6.10mm). PCB layout and mechanical mounting are fully compatible across all listed parts.

Q: What is the impact of temperature coefficient differences on circuit performance?

A: Temperature coefficient determines resistance value drift across the operating temperature range (-65°C to 175°C). RN55C7501BB14 and RN55C7501FB14 with ±50ppm/°C provide tighter resistance stability compared to RN55D7501FBSL and RN55D7501FB14 with ±100ppm/°C. Selection depends on circuit sensitivity to resistance variation over temperature.