RN55C1004CBSL Equivalent & Substitute Parts

Part Overview

The RN55C1004CBSL is a 1 MOhm ±0.25% 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. The part is currently active in production with 958 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit tolerance or temperature coefficient upgrades.

Substiute Parts

RN55C1004CBSL

Vishay DaleIn Stock: 1034RN55C1004CBSL Datasheet

Current PartRFQ

RN55C1004BB14

Vishay DaleIn Stock: 1102RN55C1004BB14 Datasheet

UpgradeRFQ

RN55E1004BB14

Vishay DaleIn Stock: 1287RN55E1004BB14 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN55C1004CBSL is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 1 MOhms
• Power rating: 0.125W (1/8W)
• Package type: Axial
• Operating temperature range: -65°C to 175°C
• Composition: Metal Film
• Series compliance: MIL-R-10509/7, RN55

Allowable Variation Parameters:

• Tolerance: May be tighter (lower value) than ±0.25%
• Temperature coefficient: May be tighter (lower value) than ±50ppm/°C

The identified substitutes RN55C1004BB14 and RN55E1004BB14 meet all mandatory matching parameters. Both parts offer improved tolerance specifications (±0.1% versus ±0.25%), making them suitable upgrades. RN55E1004BB14 additionally provides a superior temperature coefficient of ±25ppm/°C compared to the original ±50ppm/°C.

Parameter Comparison

Engineering Selection Recommendations

RN55C1004CBSL (Primary Part): Select when tolerance specification of ±0.25% is sufficient for circuit requirements and primary sourcing is available.

RN55C1004BB14 (Direct Upgrade): This substitute provides tighter tolerance (±0.1%) while maintaining identical temperature coefficient and all other electrical characteristics. Use when improved tolerance performance is beneficial and inventory availability is higher (1032 units).

RN55E1004BB14 (Enhanced Upgrade): This substitute offers both tighter tolerance (±0.1%) and superior temperature coefficient (±25ppm/°C versus ±50ppm/°C). Select for applications requiring enhanced stability across temperature extremes or when long-term drift performance is critical. Highest inventory availability (1203 units) supports supply chain continuity.

All three parts maintain identical RoHS non-compliance status, REACH affected status, and military-grade certifications (MIL-R-10509/7). Selection between substitutes depends on circuit performance requirements rather than compliance or certification differences.

Frequently Asked Questions (FAQ)

Q: Can RN55C1004BB14 or RN55E1004BB14 be used as direct replacements for RN55C1004CBSL?

A: Yes. Both substitutes maintain identical resistance (1 MOhms), power rating (0.125W), package type (Axial), operating temperature range (-65°C to 175°C), and military series compliance. The substitutes offer equal or superior tolerance and temperature coefficient specifications.

Q: What is the difference between RN55C1004BB14 and RN55E1004BB14?

A: Both parts share ±0.1% tolerance. The primary difference is temperature coefficient: RN55C1004BB14 has ±50ppm/°C (matching the original part), while RN55E1004BB14 has ±25ppm/°C (half the drift rate). RN55E1004BB14 is preferred for temperature-sensitive applications.

Q: Are there any package or footprint differences between these parts?

A: No. All three parts are identical in package type (Axial) and physical dimensions (0.090" Dia x 0.240" L / 2.29mm x 6.10mm). They are mechanically interchangeable.

Q: Does tolerance improvement affect circuit compatibility?

A: Tighter tolerance (±0.1% versus ±0.25%) reduces component variation and improves circuit predictability. This is a performance enhancement with no negative compatibility impact. Circuits designed for ±0.25% tolerance will perform within specification with ±0.1% components.

Q: Which substitute should be selected for new designs?

A: RN55E1004BB14 is recommended for new designs requiring military-grade performance, as it provides superior temperature stability (±25ppm/°C) and tighter tolerance (±0.1%) with the highest inventory availability (1203 units).