RG2012P-78R7-B-T1 Equivalent & Substitute Parts

Part Overview

The RG2012P-78R7-B-T1 is a 78.7 Ohm ±0.1% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. Manufactured by Susumu with anti-sulfur coating and automotive AEC-Q200 qualification, this component is designed for precision applications in automotive and industrial environments. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Resistance	78.7 Ohms
Tolerance	±0.1%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C to 155°C
Features	Anti-Sulfur, Automotive AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012P-78R7-B-T1 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 78.7 Ohms (exact match required)
Package type: 0805 (2012 Metric) (physical and electrical footprint compatibility)
Tolerance: ±0.1% or tighter (maintains circuit precision requirements)
Power rating: 0.125W minimum (electrical stress compatibility)
Composition: Thin film (performance characteristics)
Operating temperature range: -55°C to 155°C minimum (thermal compatibility)

Substitution Categories:

Direct Equivalents maintain all electrical and mechanical specifications of the original part, differing only in packaging format (bulk vs. tape & reel) or minor manufacturing variations.

Upgrade Substitutes offer improved performance characteristics such as tighter temperature coefficient (±10ppm/°C vs. ±25ppm/°C) or enhanced tolerance (±0.05% vs. ±0.1%) while maintaining all other critical parameters.

Cross-Manufacturer Equivalents provide identical electrical specifications from alternative manufacturers, ensuring functional compatibility while offering supply chain flexibility.

Higher Power Rating Substitutes exceed the original 0.125W specification, providing additional thermal margin for applications requiring enhanced power dissipation capability.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Temp Range (°C)	Features	Status
RG2012P-78R7-B-T1	Susumu	78.7 Ω	±0.1%	0.125	±25	-55 to 155	Anti-Sulfur, AEC-Q200	Obsolete
RG2012P-78R7-B-T5	Susumu	78.7 Ω	±0.1%	0.125	±25	-55 to 155	Anti-Sulfur, AEC-Q200	Active
RG2012N-78R7-B-T5	Susumu	78.7 Ω	±0.1%	0.125	±10	-55 to 155	Anti-Sulfur, AEC-Q200	Active
RG2012N-78R7-W-T1	Susumu	78.7 Ω	±0.05%	0.125	±10	-55 to 155	Anti-Sulfur, AEC-Q200	Active
RG2012P-78R7-W-T5	Susumu	78.7 Ω	±0.05%	0.125	±25	-55 to 155	Anti-Sulfur, AEC-Q200	Active
1-2176091-4	TE Connectivity	78.7 Ω	±0.1%	0.25	±25	-55 to 155	Thin Film	Active
ERA-6AEB78R7V	Panasonic	78.7 Ω	±0.1%	0.125	±25	-55 to 155	AEC-Q200	Active
MCU08050D7879BP100	Vishay Beyschlag	78.7 Ω	±0.1%	0.125	±25	-55 to 125	Anti-Sulfur	Active
RT0805BRD0778R7L	YAGEO	78.7 Ω	±0.1%	0.125	±25	-55 to 155	Thin Film	Active
TNPW080578R7BEEA	Vishay Dale	78.7 Ω	±0.1%	0.26	±25	-55 to 175	Anti-Sulfur, AEC-Q200, Moisture Resistant	Active
TNPW080578R7BEEN	Vishay Dale	78.7 Ω	±0.1%	0.26	±25	-55 to 175	Anti-Sulfur, AEC-Q200, Moisture Resistant	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

RG2012P-78R7-B-T5 is the direct equivalent of the obsolete RG2012P-78R7-B-T1. Both parts are manufactured by Susumu with identical electrical specifications, anti-sulfur coating, and AEC-Q200 automotive qualification. The only difference is packaging format (tape & reel vs. bulk). This part maintains full compatibility with existing designs and is currently in active production status with 805 pieces in stock.

Susumu Upgrade Options:

RG2012N-78R7-B-T5 and RG2012N-78R7-W-T1 offer enhanced performance through improved temperature coefficient (±10ppm/°C) and tighter tolerance (±0.05%), respectively. These upgrades are suitable for applications requiring superior stability and precision while maintaining the same 0805 package and AEC-Q200 qualification.

Cross-Manufacturer Equivalents:

ERA-6AEB78R7V (Panasonic), RT0805BRD0778R7L (YAGEO), and MCU08050D7879BP100 (Vishay Beyschlag) provide functionally equivalent alternatives with identical 78.7 Ohm resistance, ±0.1% tolerance, and 0.125W power rating in 0805 package. All three are active production parts with ROHS3 compliance. ERA-6AEB78R7V and RT0805BRD0778R7L maintain the full -55°C to 155°C operating range. MCU08050D7879BP100 operates to 125°C maximum, which is acceptable for most applications but should be verified for high-temperature environments.

Higher Power Rating Alternatives:

1-2176091-4 (TE Connectivity) and TNPW080578R7BEEA/TNPW080578R7BEEN (Vishay Dale) provide increased power dissipation capability (0.25W and 0.26W respectively) in the same 0805 package. These are suitable for applications where thermal margin is required. TNPW parts additionally offer extended operating temperature to 175°C and moisture-resistant construction.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity level). AEC-Q200 automotive qualification is retained in Susumu, Panasonic, and Vishay Dale options, ensuring suitability for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can RG2012P-78R7-B-T5 be used as a direct replacement for RG2012P-78R7-B-T1?

A: Yes. RG2012P-78R7-B-T5 is the direct equivalent with identical electrical specifications (78.7 Ohms ±0.1%, 0.125W, ±25ppm/°C), anti-sulfur coating, and AEC-Q200 qualification. The difference is packaging format (tape & reel). Both parts are physically and electrically compatible in 0805 footprints.

Q: What is the difference between RG2012P and RG2012N series?

A: The RG2012N series offers improved temperature coefficient (±10ppm/°C) compared to RG2012P (±25ppm/°C). Both maintain the same 78.7 Ohm resistance and 0.125W power rating. Selection depends on application requirements for temperature stability.

Q: Can I use a higher power rating resistor as a substitute?

A: Yes. 1-2176091-4 (0.25W) and TNPW080578R7BEEA/TNPW080578R7BEEN (0.26W) are electrically compatible substitutes with identical resistance and tolerance. Higher power ratings provide additional thermal margin without affecting circuit function. Physical dimensions remain within 0805 package specifications.

Q: Are cross-manufacturer parts (Panasonic, YAGEO, Vishay) fully compatible?

A: Yes. ERA-6AEB78R7V, RT0805BRD0778R7L, and MCU08050D7879BP100 provide equivalent electrical performance with 78.7 Ohms ±0.1% tolerance and 0.125W rating in 0805 package. All are ROHS3 compliant and suitable for general applications. Verify operating temperature requirements: MCU08050D7879BP100 is rated to 125°C maximum, while others extend to 155°C.

Q: Does the tolerance difference between ±0.1% and ±0.05% affect substitution?

A: ±0.05% tolerance (RG2012N-78R7-W-T1, RG2012P-78R7-W-T5) is tighter and represents an upgrade. These parts are fully compatible substitutes for applications originally specified with ±0.1% tolerance. Use ±0.05% parts when enhanced precision is required.

Q: What is the significance of anti-sulfur coating?

A: Anti-sulfur coating protects resistor elements from sulfur-containing atmospheric contaminants, extending reliability in harsh environments. Susumu RG series, Panasonic ERA-6AEB78R7V, Vishay Beyschlag MCU series, and Vishay Dale TNPW series include this feature. YAGEO RT0805BRD0778R7L does not specify anti-sulfur coating but remains functionally compatible.

Q: Is AEC-Q200 qualification required for my application?

A: AEC-Q200 qualification is mandatory for automotive applications. RG2012P-78R7-B-T5, RG2012N series (Susumu), ERA-6AEB78R7V (Panasonic), and TNPW series (Vishay Dale) maintain this certification. If automotive qualification is not required, all listed substitutes are acceptable.

Q: What is MSL 1 (Unlimited) moisture sensitivity level?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed substitutes carry MSL 1 rating, eliminating moisture-related handling constraints.

Q: Can I mix different manufacturers in the same design?

A: Yes. All listed substitutes meet identical electrical specifications (78.7 Ohms ±0.1%, 0.125W, 0805 package) and are mechanically compatible. Cross-manufacturer substitution is acceptable for both new designs and rework applications.

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