RN732ATTD40R2C25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD40R2C25 is a 40.2 Ohm ±0.25% thin film chip resistor manufactured by KOA Speer Electronics, Inc. in 0805 (2012 Metric) package format with 0.1W power rating. This component is classified as obsolete product status. Due to its obsolete designation, locating equivalent or substitute parts from current production inventory becomes necessary for ongoing design support, maintenance, and new procurement requirements. Substitute parts must maintain identical electrical specifications while potentially offering enhanced features or active production status.

Substiute Parts

RN732ATTD40R2C25

KOA Speer Electronics, Inc.In Stock: 1046RN732ATTD40R2C25 Datasheet

Current PartRFQ

RN73R2ATTD40R2C25

KOA Speer Electronics, Inc.In Stock: 774RN73R2ATTD40R2C25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD40R2C25 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 40.2 Ohms (exact match required)
• Tolerance: ±0.25% (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Composition: Thin Film (exact match required)
• Temperature Coefficient: ±25ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)

Allowable Variation Parameters:

• Power Rating: Equal or greater than 0.1W
• Features: May include additional certifications or enhancements (e.g., Automotive AEC-Q200)
• Product Status: Active production preferred over obsolete

The substitute part RN73R2ATTD40R2C25 satisfies all mandatory matching parameters and provides increased power rating (0.125W vs. 0.1W) with additional automotive qualification, making it a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD40R2C25 is a direct substitute for the obsolete RN732ATTD40R2C25. Selection of the substitute part is supported by the following factors:

Electrical Compatibility: All critical electrical parameters match exactly: 40.2 Ohm resistance, ±0.25% tolerance, ±25ppm/°C temperature coefficient, and -55°C ~ 155°C operating temperature range.

Package Compatibility: Both parts use identical 0805 (2012 Metric) package dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm), ensuring direct PCB footprint compatibility without layout modifications.

Power Rating: The substitute part provides 0.125W power rating compared to the main part's 0.1W rating. This represents a 25% increase in power dissipation capability, maintaining full backward compatibility for applications within the original 0.1W specification.

Compliance Status: Both parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. The substitute part adds Automotive AEC-Q200 qualification, providing enhanced reliability documentation for automotive and high-reliability applications.

Production Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD40R2C25 be used as a direct replacement for RN732ATTD40R2C25 in existing designs?

A: Yes. The substitute part maintains identical electrical specifications (40.2 Ohms ±0.25%, ±25ppm/°C, -55°C ~ 155°C) and package format (0805 2012 Metric). No circuit modifications or PCB layout changes are required.

Q: What is the significance of the higher power rating (0.125W vs. 0.1W) in the substitute part?

A: The substitute part's 0.125W rating provides additional thermal margin for the same application. Applications designed for 0.1W operation remain fully compatible. The higher rating does not affect electrical performance or circuit behavior.

Q: Does the Automotive AEC-Q200 qualification on the substitute part affect its use in non-automotive applications?

A: No. AEC-Q200 qualification represents an additional quality and reliability standard. Parts meeting automotive standards are suitable for general industrial and commercial applications without restriction.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both parts share identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) with maximum seated height of 0.024" (0.60mm). PCB footprints are interchangeable.

Q: What is the difference between the RN73 and RN73R series designations?

A: The RN73R series (substitute part) includes Automotive AEC-Q200 qualification and active production status. The RN73 series (main part) represents the standard thin film resistor line with obsolete status. Electrical specifications remain identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both RN732ATTD40R2C25 and RN73R2ATTD40R2C25 maintain full ROHS3 compliance and REACH unaffected status.

Q: What packaging options are available for the substitute part?

A: The substitute part RN73R2ATTD40R2C25 is supplied in Tape & Reel (TR) packaging format for automated assembly processes.