RT0402FRE07178RL Equivalent & Substitute Parts

Part Overview

The RT0402FRE07178RL is a 178 Ohm ±1% thin film chip resistor in 0402 (1005 Metric) package manufactured by YAGEO. This surface mount resistor is rated for 0.063W (1/16W) power dissipation and operates across -55°C to 155°C. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained while potentially offering improved specifications or enhanced reliability features.

Key Parameters

Parameter	Value
Resistance	178 Ohms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package	0402 (1005 Metric)
Composition	Thin Film
Operating Temperature Range	-55°C to 155°C
Temperature Coefficient	±50ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RT0402FRE07178RL is determined by the following mandatory parameters:

Resistance value: 178 Ohms (exact match required)
Package type: 0402 (1005 Metric) (exact match required)
Power rating: 0.063W minimum (equal or higher acceptable)
Composition: Thin Film (exact match required)
Operating temperature range: -55°C to 155°C minimum (equal or wider acceptable)
RoHS compliance: ROHS3 Compliant (required)
Moisture sensitivity: MSL 1 (required)

Tolerance and temperature coefficient may vary within acceptable engineering margins. Substitute parts identified below meet all mandatory parameters while offering equal or improved electrical characteristics.

Parameter Comparison

Parameter	RT0402FRE07178RL (YAGEO)	CPF0402B178RE1 (TE Connectivity)	ERA-2AEB1780X (Panasonic)
Resistance	178 Ohms	178 Ohms	178 Ohms
Tolerance	±1%	±0.1%	±0.1%
Power Rating	0.063W (1/16W)	0.063W (1/16W)	0.063W (1/16W)
Package	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)
Composition	Thin Film	Thin Film	Thin Film
Temperature Coefficient	±50ppm/°C	±25ppm/°C	±25ppm/°C
Operating Temperature	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)
Height - Seated (Max)	0.014" (0.35mm)	0.014" (0.35mm)	0.016" (0.40mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both CPF0402B178RE1 and ERA-2AEB1780X are direct substitutes for RT0402FRE07178RL based on electrical and mechanical compatibility.

CPF0402B178RE1 (TE Connectivity Passive Product) offers improved tolerance (±0.1% versus ±1%) and lower temperature coefficient (±25ppm/°C versus ±50ppm/°C) while maintaining identical package dimensions and power rating. This part is suitable for applications requiring tighter resistance tolerance and improved temperature stability.

ERA-2AEB1780X (Panasonic Electronic Components) provides the same tolerance and temperature coefficient improvements as the TE Connectivity part, with the additional qualification of AEC-Q200 automotive standard. The seated height is 0.016" (0.40mm) compared to 0.014" (0.35mm) for the primary part. This part is appropriate for automotive applications or systems requiring automotive-grade component reliability.

Selection between substitutes should be based on application requirements for tolerance precision, temperature stability, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: Can CPF0402B178RE1 be used as a direct replacement for RT0402FRE07178RL?

A: Yes. Both parts share identical resistance value (178 Ohms), package type (0402), power rating (0.063W), and operating temperature range (-55°C to 155°C). The CPF0402B178RE1 offers improved tolerance (±0.1%) and temperature coefficient (±25ppm/°C), making it functionally compatible and electrically superior for most applications.

Q: What is the difference between CPF0402B178RE1 and ERA-2AEB1780X?

A: Both parts have identical electrical specifications (178 Ohms ±0.1%, ±25ppm/°C). The primary difference is that ERA-2AEB1780X carries AEC-Q200 automotive qualification and has a maximum seated height of 0.016" (0.40mm) versus 0.014" (0.35mm) for CPF0402B178RE1. Select ERA-2AEB1780X for automotive applications or when AEC-Q200 compliance is required.

Q: Are there any height clearance concerns when substituting ERA-2AEB1780X?

A: ERA-2AEB1780X has a maximum seated height of 0.016" (0.40mm) compared to 0.014" (0.35mm) for the original RT0402FRE07178RL. Verify PCB layout and component clearance requirements before substitution if height-constrained applications are involved.

Q: Do all three parts have the same moisture sensitivity rating?

A: Yes. RT0402FRE07178RL, CPF0402B178RE1, and ERA-2AEB1780X all have MSL 1 (Unlimited) moisture sensitivity level, indicating no moisture sensitivity precautions are required during storage or handling.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and suitable for applications requiring RoHS compliance.

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