RT0805FRE0739K2L Equivalent & Substitute Parts

Part Overview

The RT0805FRE0739K2L is a 39.2 kOhms ±1% thin film chip resistor in 0805 (2012 Metric) package manufactured by YAGEO. This component is rated for 0.125W (1/8W) power dissipation with an operating temperature range of -55°C to 155°C. The part is ROHS3 compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating, indicating suitability for standard PCB assembly processes.

Substitute parts are identified when equivalent resistance values, package dimensions, and power ratings are maintained while tolerance, temperature coefficient, or manufacturer specifications may vary. Alternative sources ensure supply chain flexibility and design continuity.

Key Parameters

Parameter	Value
Resistance	39.2 kOhms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature	-55°C to 155°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Parameters (Must Match):

Resistance value: 39.2 kOhms
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance

Variable Parameters (Allowed to Differ):

Tolerance: May be tighter (±0.1%, ±0.5%) than the original ±1%
Power rating: May be equal or higher (0.125W or 0.25W)
Temperature coefficient: May vary (±25ppm/°C or ±50ppm/°C)
Manufacturer and series designation
Additional certifications (AEC-Q200, Anti-Sulfur features)

All identified substitutes maintain the core electrical and mechanical compatibility required for direct PCB replacement without design modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Height Max (mm)	RoHS Status
RT0805FRE0739K2L	YAGEO	39.2 kOhms	±1%	0.125	±50	0805	0.60	ROHS3
RT0805BRD0739K2L	YAGEO	39.2 kOhms	±0.1%	0.125	±25	0805	0.60	ROHS3
RT0805DRE0739K2L	YAGEO	39.2 kOhms	±0.5%	0.125	±50	0805	0.60	ROHS3
RP73PF2A39K2BTDF	TE Connectivity	39.2 kOhms	±0.1%	0.25	±25	0805	0.65	ROHS3
ERA-6AEB3922V	Panasonic	39.2 kOhms	±0.1%	0.125	±25	0805	0.60	ROHS3
RG2012P-3922-B-T5	Susumu	39.2 kOhms	±0.1%	0.125	±25	0805	0.50	ROHS3

Engineering Selection Recommendations

YAGEO RT0805BRD0739K2L and RT0805DRE0739K2L: Both are YAGEO series alternatives offering improved tolerance specifications (±0.1% and ±0.5% respectively) while maintaining identical package dimensions and power ratings. These are direct upgrades within the same manufacturer ecosystem, suitable for applications requiring tighter tolerance control.

TE Connectivity RP73PF2A39K2BTDF: This substitute provides higher power dissipation capability (0.25W vs. 0.125W) with ±0.1% tolerance and ±25ppm/°C temperature coefficient. The increased height (0.65mm vs. 0.60mm) must be verified against PCB clearance constraints. Suitable for designs with elevated thermal requirements.

Panasonic ERA-6AEB3922V: Carries AEC-Q200 automotive qualification with ±0.1% tolerance and ±25ppm/°C temperature coefficient. Identical package dimensions and power rating to the original part. Appropriate for automotive-grade applications requiring enhanced reliability documentation.

Susumu RG2012P-3922-B-T5: Features AEC-Q200 automotive qualification combined with anti-sulfur protection. Offers the lowest seated height (0.50mm) among substitutes with ±0.1% tolerance and ±25ppm/°C temperature coefficient. Suitable for space-constrained automotive or harsh environment applications.

All substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard reflow assembly processes.

Frequently Asked Questions (FAQ)

Q: Can RT0805BRD0739K2L replace RT0805FRE0739K2L directly on the PCB?

A: Yes. Both parts share identical package dimensions (0805), power rating (0.125W), and operating temperature range (-55°C to 155°C). The RT0805BRD0739K2L offers tighter tolerance (±0.1% vs. ±1%) and lower temperature coefficient (±25ppm/°C vs. ±50ppm/°C), making it a direct functional upgrade.

Q: What is the difference between the TE Connectivity RP73PF2A39K2BTDF and other substitutes?

A: The RP73PF2A39K2BTDF provides double the power rating (0.25W vs. 0.125W) and has a maximum seated height of 0.65mm compared to 0.60mm for most alternatives. This higher power capability suits applications with greater thermal dissipation needs, but clearance verification is required.

Q: Are the Panasonic ERA-6AEB3922V and Susumu RG2012P-3922-B-T5 suitable for automotive applications?

A: Both parts carry AEC-Q200 automotive qualification. The Susumu part additionally features anti-sulfur protection. Selection depends on specific environmental requirements and supply chain preferences.

Q: Does tolerance difference affect circuit performance?

A: Tolerance affects the precision of the resistance value. The original ±1% tolerance allows ±392 Ohms variation around 39.2 kOhms. Tighter tolerance substitutes (±0.1%) reduce this variation to ±39.2 Ohms. Selection depends on circuit sensitivity to resistance variation.

Q: Can I use a higher power-rated substitute in place of the original part?

A: Yes. A 0.25W-rated resistor (RP73PF2A39K2BTDF) can replace a 0.125W-rated part without electrical degradation. Higher power rating provides additional thermal margin. Verify PCB layout accommodates the slightly increased height (0.65mm vs. 0.60mm).

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly and reflow processes.

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