RN70D1003FBSL Equivalent & Substitute Parts

Part Overview

The RN70D1003FBSL is a 100 kOhms ±1% metal film through-hole resistor rated at 0.75W (3/4W) in axial package configuration. Manufactured by Vishay Dale, this component is part of the military-grade RN70 series compliant with MIL-R-10509/3 specifications. The part features flame retardant coating, moisture resistance, and safety-rated construction suitable for military and high-reliability applications. With active product status and 1033 units in stock, substitute parts may be required for design optimization, inventory management, or performance enhancement in specific operating conditions.

Substiute Parts

RN70D1003FBSL

Vishay DaleIn Stock: 1125RN70D1003FBSL Datasheet

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RN70C1003FB14

Vishay DaleIn Stock: 1467RN70C1003FB14 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RN70D1003FBSL is permissible with parts meeting the following criteria:

• Resistance value: 100 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.75W minimum (equal or higher acceptable)
• Composition: Metal Film (required for stability and reliability)
• Package: Axial through-hole (mechanical and electrical compatibility)
• Operating temperature range: -65°C to 175°C minimum (equal or wider acceptable)
• Series compliance: RN70 military series (MIL-R-10509/3)
• Features: Flame retardant coating, moisture resistance, safety rating (required for application equivalence)

The RN70C1003FB14 qualifies as a direct substitute based on identical electrical specifications, mechanical dimensions, and military-grade construction. The primary distinction lies in the temperature coefficient parameter, which is improved in the substitute part.

Parameter Comparison

Engineering Selection Recommendations

Both RN70D1003FBSL and RN70C1003FB14 maintain active product status with full military-grade compliance to MIL-R-10509/3 specifications. Selection between these parts should be based on the following engineering considerations:

RN70D1003FBSL is appropriate for applications where the standard temperature coefficient of ±100ppm/°C meets circuit tolerance requirements and where existing inventory or procurement channels favor this variant.

RN70C1003FB14 is suitable for applications requiring enhanced temperature stability, as the ±50ppm/°C temperature coefficient provides superior performance across the full -65°C to 175°C operating range. This improved stability may reduce circuit drift in precision measurement, signal conditioning, or feedback network applications.

Both parts are RoHS non-compliant and REACH-affected, requiring compliance verification within the end-application regulatory framework. Mechanical and electrical interchangeability is complete, with no design modifications required for substitution.

Frequently Asked Questions (FAQ)

Q: Can RN70C1003FB14 be used as a direct replacement for RN70D1003FBSL in existing designs?

A: Yes. Both parts are mechanically and electrically identical in all critical parameters: 100 kOhms resistance, ±1% tolerance, 0.75W power rating, axial package, and military-grade construction. The substitute part features improved temperature coefficient performance.

Q: What is the significance of the temperature coefficient difference between these parts?

A: Temperature coefficient defines resistance change per degree Celsius. RN70D1003FBSL exhibits ±100ppm/°C drift, while RN70C1003FB14 exhibits ±50ppm/°C drift. The lower coefficient in the substitute part results in more stable resistance values across temperature extremes, beneficial in precision circuits operating across the full -65°C to 175°C range.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.180" diameter by 0.562" length (4.57mm x 14.27mm), ensuring identical PCB footprint and mechanical fit.

Q: Do both parts meet the same military specifications?

A: Yes. Both RN70D1003FBSL and RN70C1003FB14 are part of the RN70 series and comply with MIL-R-10509/3 military resistor specifications, including flame retardant coating, moisture resistance, and safety rating requirements.

Q: What is the inventory status for each part?

A: RN70D1003FBSL has 1033 units in stock. RN70C1003FB14 has 1421 units in stock. Both are available as new original components.