RN732ATTD4170C25 Equivalent & Substitute Parts

Part Overview

The RN732ATTD4170C25 is a 417 Ohm thin film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.1W (1/10W) in 0805 (2012 Metric) package format. This component features ±0.25% tolerance, moisture resistance, and operates across -55°C to 155°C. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

RN732ATTD4170C25

KOA Speer Electronics, Inc.In Stock: 990RN732ATTD4170C25 Datasheet

Current PartRFQ

RN73R2ATTD4170C25

KOA Speer Electronics, Inc.In Stock: 858RN73R2ATTD4170C25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RN732ATTD4170C25 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 417 Ohms
• Tolerance: ±0.25%
• Package / Case: 0805 (2012 Metric)
• Composition: Thin Film
• Temperature Coefficient: ±25ppm/°C
• Operating Temperature Range: -55°C ~ 155°C
• Moisture Resistance: Required

Allowable Variation Parameters:

• Power Rating: Equal or greater than 0.1W
• Product Status: Active or Obsolete
• Certifications and compliance ratings: May differ based on application requirements

The RN73R2ATTD4170C25 qualifies as a direct substitute based on matching all mandatory parameters while providing an increased power rating of 0.125W (1/8W) and active product status with automotive AEC-Q200 qualification.

Parameter Comparison

Engineering Selection Recommendations

The RN73R2ATTD4170C25 is the qualified substitute for the obsolete RN732ATTD4170C25. Selection rationale is based on the following engineering factors:

Product Status: The substitute part maintains active product status with KOA Speer Electronics, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Equivalence: Both parts maintain identical resistance (417 Ohms), tolerance (±0.25%), temperature coefficient (±25ppm/°C), and operating temperature range (-55°C ~ 155°C). The substitute's increased power rating (0.125W versus 0.1W) provides enhanced thermal margin without affecting circuit performance.

Compliance and Certifications: Both parts are ROHS3 compliant with MSL 1 rating. The substitute includes automotive AEC-Q200 qualification, which extends applicability to automotive and high-reliability applications while maintaining compatibility with general industrial use cases.

Package Compatibility: Identical 0805 (2012 Metric) package dimensions and termination configuration ensure direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can RN73R2ATTD4170C25 be used as a direct replacement for RN732ATTD4170C25 on existing PCBs?

A: Yes. Both parts share identical package dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm), height (0.024" maximum), and termination configuration. No PCB layout changes are required.

Q: What is the significance of the increased power rating in the substitute part?

A: The RN73R2ATTD4170C25 is rated at 0.125W (1/8W) compared to the main part's 0.1W (1/10W). This 25% increase in power dissipation capacity provides additional thermal headroom in the same physical package, reducing operating temperature stress without affecting electrical performance in circuits designed for the original 0.1W specification.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant with MSL 1 rating. The substitute includes automotive AEC-Q200 qualification, which indicates enhanced reliability testing and suitability for automotive applications. This additional qualification does not restrict use in non-automotive applications.

Q: Why is the main part classified as obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand and production decisions. The RN73R2ATTD4170C25 remains in active production, providing a viable path for design continuity and future procurement.

Q: Are the thin film composition and moisture resistance properties identical?

A: Yes. Both parts utilize thin film composition with moisture-resistant construction. Temperature coefficient specifications (±25ppm/°C) and operating temperature ranges (-55°C ~ 155°C) are identical, ensuring equivalent performance characteristics in temperature-sensitive applications.

Q: What packaging format is available for the substitute part?

A: The RN73R2ATTD4170C25 is supplied in Tape & Reel (TR) format, standard for automated assembly processes. Confirm packaging requirements with procurement specifications before ordering.