Equivalent & Substitute Parts for RT0805CRE0729K4L

Part Overview

The RT0805CRE0729K4L is a 29.4 kOhms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) operation. Manufactured by YAGEO and classified as Active product status, this component is widely used in precision analog circuits and signal conditioning applications. Substitute parts become necessary due to inventory constraints, design upgrades requiring tighter tolerances, or application-specific requirements such as automotive qualification or enhanced temperature stability.

Key Parameters

Parameter	Value
Resistance	29.4 kOhms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RT0805CRE0729K4L is determined by the following criteria:

Primary Substitution Parameters:

Resistance value: 29.4 kOhms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Operating Temperature Range: -55°C ~ 155°C (minimum requirement)
RoHS Status: ROHS3 Compliant (minimum requirement)

Secondary Compatibility Parameters:

Tolerance: ±0.25% or tighter (±0.1% acceptable as upgrade)
Power Rating: 0.125W minimum (0.25W acceptable as upgrade)
Temperature Coefficient: ±50ppm/°C or better (±25ppm/°C acceptable as upgrade)

All substitute parts listed maintain identical physical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm) and termination count (2 terminations), ensuring direct PCB compatibility without layout modifications.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power Rating	Temp. Coeff.	Product Status	Special Features
RT0805CRE0729K4L	YAGEO	29.4 kOhms	±0.25%	0.125W	±50ppm/°C	Active	—
RT0805BRD0729K4L	YAGEO	29.4 kOhms	±0.1%	0.125W	±25ppm/°C	Active	Tighter tolerance, improved stability
RT0805BRE0729K4L	YAGEO	29.4 kOhms	±0.1%	0.125W	±50ppm/°C	Active	Tighter tolerance
4-2176093-7	TE Connectivity	29.4 kOhms	±0.1%	0.25W	±25ppm/°C	Active	Higher power rating, improved stability
ERA-6AEB2942V	Panasonic	29.4 kOhms	±0.1%	0.125W	±25ppm/°C	Active	AEC-Q200 automotive qualified

Engineering Selection Recommendations

YAGEO RT0805BRD0729K4L and RT0805BRE0729K4L: Both parts offer tolerance upgrades from ±0.25% to ±0.1%, maintaining identical power ratings and package specifications. RT0805BRD0729K4L provides additional temperature coefficient improvement (±25ppm/°C vs. ±50ppm/°C), making it suitable for applications requiring enhanced thermal stability. Both remain ROHS3 compliant with unlimited moisture sensitivity rating.

TE Connectivity 4-2176093-7: This part doubles the power rating to 0.25W while maintaining ±0.1% tolerance and ±25ppm/°C temperature coefficient. Physical dimensions remain compatible (0.079" L x 0.049" W), though maximum seated height increases marginally to 0.026" (0.65mm). Selection is appropriate for circuits requiring higher power dissipation margins or thermal headroom.

Panasonic ERA-6AEB2942V: This part combines ±0.1% tolerance with ±25ppm/°C temperature coefficient and includes AEC-Q200 automotive qualification. Identical power rating (0.125W) and package dimensions ensure direct substitution. Selection is mandatory for automotive applications or systems requiring automotive-grade component reliability.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can RT0805BRD0729K4L replace RT0805CRE0729K4L in any application?

A: Yes. RT0805BRD0729K4L is a direct substitute with improved tolerance (±0.1% vs. ±0.25%) and temperature coefficient (±25ppm/°C vs. ±50ppm/°C). All other parameters—resistance value, power rating, package, operating temperature range, and RoHS compliance—remain identical or superior.

Q: What is the difference between RT0805BRD0729K4L and RT0805BRE0729K4L?

A: Both parts share ±0.1% tolerance and 0.125W power rating. RT0805BRD0729K4L offers ±25ppm/°C temperature coefficient, while RT0805BRE0729K4L maintains ±50ppm/°C. Selection depends on thermal stability requirements; RT0805BRD0729K4L is preferred for precision applications.

Q: Can the TE Connectivity 4-2176093-7 be used as a direct replacement?

A: Yes, with consideration for power rating. The 4-2176093-7 provides 0.25W (1/4W) versus the original 0.125W (1/8W), offering additional thermal margin. Physical footprint remains compatible. Maximum seated height increases from 0.024" to 0.026", which is negligible for standard PCB layouts.

Q: Is the Panasonic ERA-6AEB2942V suitable for non-automotive applications?

A: Yes. ERA-6AEB2942V meets all electrical and mechanical requirements for the original specification and exceeds them with ±0.1% tolerance and ±25ppm/°C temperature coefficient. AEC-Q200 qualification is an additional feature that does not restrict use in non-automotive circuits.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All listed parts are supplied in Tape & Reel (TR) packaging with identical 0805 (2012 Metric) package specifications, ensuring compatibility with standard pick-and-place assembly processes.

Q: What determines whether a part can substitute for RT0805CRE0729K4L?

A: Substitution requires exact match on resistance value (29.4 kOhms), package type (0805), composition (thin film), and operating temperature range (-55°C ~ 155°C). Tolerance, temperature coefficient, and power rating may be equal or superior. All parts must maintain ROHS3 compliance and unlimited moisture sensitivity rating.

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