RT0402FRE0778K7L Equivalent & Substitute Parts

Part Overview

The RT0402FRE0778K7L is a 78.7 kOhms ±1% thin film chip resistor in 0402 (1005 Metric) package manufactured by YAGEO. This surface-mount device is rated for 0.063W (1/16W) power dissipation with a temperature coefficient of ±50ppm/°C and operates across -55°C to 155°C. The part is ROHS3 compliant, REACH unaffected, and carries MSL 1 (unlimited moisture sensitivity level) classification. Substitute parts are identified when equivalent resistance values, package dimensions, and power ratings are maintained while offering improved tolerance specifications or enhanced reliability features.

Key Parameters

Parameter	Value
Resistance	78.7 kOhms
Tolerance	±1%
Power Rating	0.063W (1/16W)
Package / Case	0402 (1005 Metric)
Composition	Thin Film
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Resistance Value: Must be 78.7 kOhms (exact match)
Package / Case: Must be 0402 (1005 Metric) with compatible physical dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm)
Power Rating: Must be 0.063W (1/16W) minimum
Composition: Must be Thin Film
Operating Temperature Range: Must support -55°C ~ 155°C minimum
Compliance: Must maintain ROHS3 compliance and REACH unaffected status

Tolerance specifications (±1%, ±0.5%, ±0.1%) and temperature coefficients (±50ppm/°C, ±25ppm/°C) are secondary parameters that define upgrade or equivalent relationships. Lower tolerance values represent improved precision; lower temperature coefficients represent improved stability.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Composition	Op. Temp Range	RoHS Status	Inventory (Pcs)
RT0402FRE0778K7L	YAGEO	78.7 kOhms	±1%	0.063	±50	0402	Thin Film	-55°C ~ 155°C	ROHS3	711
RT0402BRD0778K7L	YAGEO	78.7 kOhms	±0.1%	0.063	±25	0402	Thin Film	-55°C ~ 155°C	ROHS3	26849
RT0402DRD0778K7L	YAGEO	78.7 kOhms	±0.5%	0.063	±25	0402	Thin Film	-55°C ~ 155°C	ROHS3	8281
RT0402DRE0778K7L	YAGEO	78.7 kOhms	±0.5%	0.063	±50	0402	Thin Film	-55°C ~ 155°C	ROHS3	949
CPF0402B78K7E1	TE Connectivity	78.7 kOhms	±0.1%	0.063	±25	0402	Thin Film	-55°C ~ 155°C	ROHS3	2552
ERA-2AEB7872X	Panasonic	78.7 kOhms	±0.1%	0.063	±25	0402	Thin Film	-55°C ~ 155°C	ROHS3	9978

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full ROHS3 compliance with REACH unaffected classification. Selection between equivalent parts depends on application-specific tolerance and temperature coefficient requirements:

Direct Equivalents (Same Tolerance ±1%): No direct equivalents with ±1% tolerance are available in the substitute list. The RT0402FRE0778K7L remains the only ±1% option.

Precision Upgrades (±0.5% Tolerance): RT0402DRD0778K7L and RT0402DRE0778K7L both offer ±0.5% tolerance with improved temperature stability (±25ppm/°C vs. ±50ppm/°C). RT0402DRD0778K7L provides the best inventory availability (8281 pcs) among ±0.5% options.

High-Precision Upgrades (±0.1% Tolerance): RT0402BRD0778K7L (YAGEO), CPF0402B78K7E1 (TE Connectivity), and ERA-2AEB7872X (Panasonic) all deliver ±0.1% tolerance with ±25ppm/°C temperature coefficient. RT0402BRD0778K7L offers the highest inventory (26849 pcs). ERA-2AEB7872X includes AEC-Q200 automotive qualification and is suitable for automotive applications.

All substitute parts are physically compatible with the original 0402 package footprint and maintain identical power ratings and operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can RT0402BRD0778K7L replace RT0402FRE0778K7L in any application?

A: Yes, RT0402BRD0778K7L is a direct functional substitute. It maintains the same 78.7 kOhms resistance, 0402 package, 0.063W power rating, and -55°C to 155°C operating range. The improved ±0.1% tolerance and ±25ppm/°C temperature coefficient represent performance enhancements suitable for precision-critical circuits.

Q: What is the difference between RT0402DRD0778K7L and RT0402DRE0778K7L?

A: Both parts share ±0.5% tolerance and ±25ppm/°C temperature coefficient. The primary difference is inventory availability: RT0402DRD0778K7L has 8281 pcs in stock versus 949 pcs for RT0402DRE0778K7L. Electrical performance is equivalent.

Q: Is ERA-2AEB7872X suitable for automotive applications?

A: Yes. ERA-2AEB7872X carries AEC-Q200 automotive qualification and is rated for automotive-grade reliability. It maintains the same 78.7 kOhms resistance, 0402 package, and operating temperature range as the original part, with improved ±0.1% tolerance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of RT0402FRE0778K7L.

Q: Can I use a substitute part with different tolerance in a legacy design?

A: Substitution with improved tolerance (lower percentage) is generally acceptable and provides better circuit performance. Substitution with degraded tolerance (higher percentage) requires circuit analysis to confirm acceptable performance margins. All listed substitutes offer equal or better tolerance than the original ±1% specification.

Q: What is the physical compatibility of substitute parts with the original footprint?

A: All substitute parts use the 0402 (1005 Metric) package with identical land pattern dimensions (0.039" L x 0.020" W / 1.00mm x 0.50mm). ERA-2AEB7872X has a maximum seated height of 0.016" (0.40mm) versus 0.014" (0.35mm) for other parts; this minor difference does not affect PCB assembly compatibility.

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