RG2012P-121-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012P-121-C-T5 is a 120 Ohms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. Manufactured by Susumu, this component features anti-sulfur coating and automotive AEC-Q200 qualification, suitable for high-reliability applications across -55°C to 155°C operating temperature range. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility while offering active product status and improved performance characteristics where applicable.

Key Parameters

Parameter	Value
Resistance	120 Ohms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature	-55°C ~ 155°C
Temperature Coefficient	±25ppm/°C
Features	Anti-Sulfur, Automotive AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RG2012P-121-C-T5 is determined by the following mandatory parameters:

Electrical Compatibility Requirements:

Resistance value: 120 Ohms (exact match required)
Power rating: 0.125W minimum (1/8W)
Operating temperature range: -55°C to 155°C minimum
Package: 0805 (2012 Metric) form factor

Mechanical Compatibility Requirements:

Package / Case: 0805 (2012 Metric)
Number of terminations: 2
Composition: Thin Film
Height seated maximum: 0.020" to 0.024" (0.50mm to 0.60mm)

Compliance & Certification:

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Unaffected status

Substitute parts may exceed the original tolerance specification (±0.25%) with tighter tolerances (±0.1%, ±0.05%, ±0.02%) and may feature improved temperature coefficients (±5ppm/°C versus ±25ppm/°C). All listed substitutes maintain identical resistance value, power rating, package dimensions, and operating temperature range. Automotive AEC-Q200 qualification is preserved across Susumu RG series substitutes and the Panasonic ERA-6AEB121V alternative.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Status	AEC-Q200
RG2012P-121-C-T5	Susumu	120 Ω	±0.25%	0.125	±25	0805	Obsolete	Yes
RG2012N-121-B-T5	Susumu	120 Ω	±0.1%	0.125	±10	0805	Active	Yes
RG2012N-121-W-T5	Susumu	120 Ω	±0.05%	0.125	±10	0805	Active	Yes
RG2012P-121-B-T5	Susumu	120 Ω	±0.1%	0.125	±25	0805	Active	Yes
RG2012P-121-W-T5	Susumu	120 Ω	±0.05%	0.125	±25	0805	Active	Yes
RG2012V-121-B-T5	Susumu	120 Ω	±0.1%	0.125	±5	0805	Active	Yes
RG2012V-121-P-T1	Susumu	120 Ω	±0.02%	0.125	±5	0805	Active	Yes
RG2012V-121-W-T1	Susumu	120 Ω	±0.05%	0.125	±5	0805	Active	Yes
RG2012V-121-W-T5	Susumu	120 Ω	±0.05%	0.125	±5	0805	Active	Yes
RT0805CRD07120RL	YAGEO	120 Ω	±0.25%	0.125	±25	0805	Active	No
ERA-6AEB121V	Panasonic Electronic Components	120 Ω	±0.1%	0.125	±25	0805	Active	Yes

Engineering Selection Recommendations

Primary Substitutes (Susumu RG Series - Recommended):

The Susumu RG2012 series substitutes provide direct compatibility with the obsolete RG2012P-121-C-T5. All active Susumu alternatives maintain automotive AEC-Q200 qualification, anti-sulfur coating, and identical mechanical dimensions. Selection among Susumu substitutes depends on tolerance and temperature coefficient requirements:

RG2012P-121-B-T5 (16,346 units in stock): Matches original tolerance specification (±0.25%) with improved product status. Suitable for direct replacement in applications where ±0.25% tolerance is specified.
RG2012N-121-B-T5 (1,126 units in stock): Provides ±0.1% tolerance with reduced temperature coefficient (±10ppm/°C). Appropriate for applications requiring tighter tolerance than original specification.
RG2012V-121-B-T5 (975 units in stock): Offers ±0.1% tolerance with superior temperature coefficient (±5ppm/°C). Suitable for precision applications with enhanced thermal stability requirements.
RG2012V-121-P-T1 (806 units in stock): Delivers highest precision at ±0.02% tolerance with ±5ppm/°C temperature coefficient. Applicable to high-precision measurement and calibration circuits.

Secondary Substitute (Cross-Manufacturer):

ERA-6AEB121V (Panasonic, 35,480 units in stock): Maintains automotive AEC-Q200 qualification with ±0.1% tolerance. Provides alternative sourcing from established manufacturer with high inventory availability. Identical electrical and mechanical specifications to RG2012N-121-B-T5 except for temperature coefficient matching original specification (±25ppm/°C).

Alternative Substitute (Non-Automotive):

RT0805CRD07120RL (YAGEO, 792 units in stock): Matches original tolerance (±0.25%) and temperature coefficient (±25ppm/°C) with active product status. Does not carry AEC-Q200 qualification; suitable only for non-automotive applications where automotive certification is not required.

Frequently Asked Questions (FAQ)

Q: Can RG2012P-121-C-T5 be replaced with any 120 Ohm 0805 resistor?

A: No. Substitution requires matching the 0805 (2012 Metric) package, 0.125W power rating, thin film composition, and operating temperature range (-55°C to 155°C). Tolerance and temperature coefficient may be equal or superior to the original specification. For automotive applications, AEC-Q200 qualification is mandatory.

Q: What is the difference between RG2012P, RG2012N, and RG2012V series?

A: These designations indicate different tolerance and temperature coefficient grades within the Susumu RG2012 family. The "P" series features ±25ppm/°C temperature coefficient, "N" series features ±10ppm/°C, and "V" series features ±5ppm/°C. Tolerance grades (B, W, P designations) indicate ±0.1%, ±0.05%, and ±0.02% respectively.

Q: Is the RG2012P-121-C-T5 truly obsolete?

A: Yes. The part status is listed as obsolete. Active substitutes from the same manufacturer (Susumu RG series) are available with improved specifications and higher inventory levels.

Q: Can I use ERA-6AEB121V in automotive applications?

A: Yes. The ERA-6AEB121V carries automotive AEC-Q200 qualification and is suitable for automotive applications. It provides an alternative sourcing option from Panasonic with significantly higher inventory availability (35,480 units).

Q: What is the significance of the "T5" and "T1" suffixes in part numbers?

A: These suffixes indicate packaging tape specifications. Both T5 and T1 designations are compatible with standard SMD assembly equipment. Selection between them depends on specific manufacturing process requirements and tape reel specifications.

Q: Does tolerance grade affect circuit performance?

A: Tolerance grade affects the resistor's deviation from the nominal 120 Ohm value. Tighter tolerances (±0.05%, ±0.02%) reduce resistance variation and improve circuit accuracy in precision applications. Standard tolerance (±0.25%) is adequate for general-purpose circuits.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance profile of the original RG2012P-121-C-T5.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed substitutes carry MSL 1 rating, eliminating moisture management concerns during storage and assembly.

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