RT0402FRE0778R7L Equivalent & Substitute Parts

Part Overview

The RT0402FRE0778R7L is a 78.7 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 component is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and optimize cost-performance trade-offs while maintaining electrical and mechanical compatibility.

Substiute Parts

RT0402FRE0778R7L

YAGEOIn Stock: 950RT0402FRE0778R7L Datasheet

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CPF0402B78R7E1

TE Connectivity Passive ProductIn Stock: 2846CPF0402B78R7E1 Datasheet

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RN73C1E78R7BTDF

TE Connectivity Passive ProductIn Stock: 763RN73C1E78R7BTDF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the RT0402FRE0778R7L is determined by strict equivalence across the following parameters: identical resistance value (78.7 Ohms), identical package format (0402/1005 Metric), matching power rating (0.063W), thin film composition, and compatible operating temperature range (-55°C to 155°C). All substitute parts must maintain ROHS3 compliance and MSL 1 rating. Tolerance specifications may vary (±1% to ±0.1%), with tighter tolerances representing performance upgrades rather than functional substitutes. Temperature coefficient differences are acceptable provided the operating temperature envelope remains unchanged.

Parameter Comparison

Engineering Selection Recommendations

Both CPF0402B78R7E1 and RN73C1E78R7BTDF are direct functional substitutes for RT0402FRE0778R7L. All three components are ROHS3 compliant, MSL 1 rated, and maintain active product status. The substitute parts offer improved tolerance specifications (±0.1% versus ±1%), which represents enhanced precision without compromising backward compatibility. Selection between substitutes should be based on availability, lead time, and temperature coefficient requirements for the specific application. The RN73C1E78R7BTDF exhibits the lowest temperature coefficient (±10ppm/°C), suitable for applications requiring superior temperature stability.

Frequently Asked Questions (FAQ)

Q: Can CPF0402B78R7E1 or RN73C1E78R7BTDF be used as direct replacements for RT0402FRE0778R7L?

A: Yes. Both parts share identical resistance values, power ratings, package formats, and operating temperature ranges. All three components are thin film 0402 resistors rated for 0.063W with ROHS3 compliance and MSL 1 moisture sensitivity ratings.

Q: What is the significance of tolerance differences between the main part and substitutes?

A: The main part specifies ±1% tolerance, while both substitutes offer ±0.1% tolerance. Tighter tolerance specifications represent improved precision and are functionally compatible with designs requiring ±1% tolerance. No circuit redesign is necessary when upgrading to lower tolerance parts.

Q: Are there physical compatibility concerns when substituting these parts?

A: No. All three components share identical package dimensions (0402/1005 Metric), physical length (0.039"), width (0.020"), and maximum seated height (0.014"). PCB footprints and assembly processes remain unchanged.

Q: How do temperature coefficient differences affect substitution decisions?

A: Temperature coefficient values (±50ppm/°C, ±25ppm/°C, ±10ppm/°C) indicate resistance value drift across the operating temperature range. Applications requiring minimal temperature-induced resistance variation should prioritize RN73C1E78R7BTDF. For general-purpose applications, all three parts operate within the same -55°C to 155°C envelope.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RT0402FRE0778R7L, CPF0402B78R7E1, and RN73C1E78R7BTDF are all ROHS3 compliant with MSL 1 ratings, meeting environmental and regulatory requirements for modern electronics manufacturing.