RK73H2ATTD8663F Equivalent & Substitute Parts

Part Overview

The RK73H2ATTD8663F is an 866 kOhms ±1% 0.25W chip resistor in 0805 (2012 Metric) package manufactured by KOA Speer Electronics, Inc. This thick film resistor is designed for automotive applications with AEC-Q200 qualification and moisture resistance. The part is currently active in production with 4976 units in stock. Substitute parts are identified when equivalent electrical specifications and package compatibility are maintained across different manufacturers.

Substiute Parts

RK73H2ATTD8663F

KOA Speer Electronics, Inc.In Stock: 5059RK73H2ATTD8663F Datasheet

Current PartRFQ

CRCW0805866KFKEA

Vishay DaleIn Stock: 17371CRCW0805866KFKEA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H2ATTD8663F is determined by the following critical parameters:

• Resistance Value: Must be 866 kOhms
• Tolerance: Must be ±1%
• Package Type: Must be 0805 (2012 Metric)
• Composition: Must be Thick Film
• Temperature Coefficient: Must be ±100ppm/°C
• Operating Temperature Range: Must support -55°C ~ 155°C
• Automotive Compliance: Must carry AEC-Q200 rating
• RoHS Compliance: Must be ROHS3 Compliant

The CRCW0805866KFKEA from Vishay Dale meets all substitution criteria. While the power rating differs (0.125W vs. 0.25W), this represents a derating condition where the substitute part operates within acceptable thermal limits for the specified resistance and tolerance values in the 0805 package.

Parameter Comparison

Engineering Selection Recommendations

Both the RK73H2ATTD8663F and CRCW0805866KFKEA are active production parts with identical electrical specifications for resistance, tolerance, and temperature coefficient. Both carry AEC-Q200 automotive qualification and ROHS3 compliance. The parts are mechanically compatible within the 0805 package footprint with equivalent termination counts.

The primary distinction is the power rating differential. The substitute part (CRCW0805866KFKEA) is rated at 0.125W versus the original part's 0.25W rating. Selection between these parts depends on the thermal dissipation requirements of the specific circuit application. Both parts maintain identical operating temperature ranges and moisture sensitivity classifications.

Frequently Asked Questions (FAQ)

Q: Can the CRCW0805866KFKEA replace the RK73H2ATTD8663F in all applications?

A: The CRCW0805866KFKEA is electrically and mechanically compatible with the RK73H2ATTD8663F. The lower power rating (0.125W vs. 0.25W) requires verification that circuit power dissipation does not exceed the substitute part's thermal limits.

Q: Are there differences in package dimensions between these parts?

A: Both parts use the 0805 (2012 Metric) package with identical length and width (0.079" x 0.049"). The seated height differs slightly (0.024" maximum for RK73H2ATTD8663F vs. 0.020" maximum for CRCW0805866KFKEA), which is within typical PCB assembly tolerances.

Q: Do both parts meet automotive standards?

A: Yes. Both the RK73H2ATTD8663F and CRCW0805866KFKEA carry AEC-Q200 qualification for automotive applications.

Q: What is the moisture sensitivity classification for these parts?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected.