RG2012N-122-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012N-122-C-T5 is a 1.2 kOhms ±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 in harsh environments. The part operates across -55°C to 155°C with a temperature coefficient of ±10ppm/°C.

The RG2012N-122-C-T5 is classified as obsolete. Equivalent and substitute parts are available from both Susumu and alternative manufacturers including Panasonic Electronic Components and YAGEO, offering improved tolerance specifications and active product status while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	1.2 kOhms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±10ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Ratings	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012N-122-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 1.2 kOhms (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Power rating: 0.125W (1/8W) (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)
Composition: Thin Film (exact match required)

Allowable Variation Parameters:

Tolerance: Can be equal to or tighter (lower) than ±0.25%
Temperature coefficient: Can be equal to or lower than ±10ppm/°C
Automotive rating: AEC-Q200 compliance maintained across all substitutes
Manufacturer: Susumu, Panasonic Electronic Components, or YAGEO

All substitute parts listed maintain identical mechanical dimensions, termination count (2), and regulatory compliance (ROHS3, REACH Unaffected, EAR99).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Status
RG2012N-122-C-T5	Susumu	1.2 kΩ	±0.25%	0.125	±10	-55 ~ 155	0805	Obsolete
RG2012N-122-B-T5	Susumu	1.2 kΩ	±0.1%	0.125	±10	-55 ~ 155	0805	Active
RG2012N-122-W-T1	Susumu	1.2 kΩ	±0.05%	0.125	±10	-55 ~ 155	0805	Active
RG2012N-122-W-T5	Susumu	1.2 kΩ	±0.05%	0.125	±10	-55 ~ 155	0805	Active
RG2012V-122-B-T5	Susumu	1.2 kΩ	±0.1%	0.125	±5	-55 ~ 155	0805	Active
RG2012V-122-P-T1	Susumu	1.2 kΩ	±0.02%	0.125	±5	-55 ~ 155	0805	Active
RG2012V-122-W-T1	Susumu	1.2 kΩ	±0.05%	0.125	±5	-55 ~ 155	0805	Active
RG2012V-122-W-T5	Susumu	1.2 kΩ	±0.05%	0.125	±5	-55 ~ 155	0805	Active
ERA-6ARB122V	Panasonic Electronic Components	1.2 kΩ	±0.1%	0.125	±10	-55 ~ 155	0805	Active
ERA-6ARW122V	Panasonic Electronic Components	1.2 kΩ	±0.05%	0.125	±10	-55 ~ 155	0805	Active
RT0805WRB071K2L	YAGEO	1.2 kΩ	±0.05%	0.125	±10	-55 ~ 155	0805	Active

Engineering Selection Recommendations

Direct Replacement (Susumu RG Series): The RG2012N-122-B-T5 provides the closest functional equivalent with improved tolerance (±0.1% vs. ±0.25%) while maintaining identical temperature coefficient and operating range. This part is active and available in volume.

Enhanced Performance (Susumu RG Series with Improved Stability): The RG2012V series parts (RG2012V-122-B-T5, RG2012V-122-W-T1, RG2012V-122-W-T5, RG2012V-122-P-T1) offer superior temperature coefficient performance (±5ppm/°C vs. ±10ppm/°C), providing enhanced stability across the operating temperature range. These parts are active and suitable for applications requiring tighter thermal performance.

Cross-Manufacturer Alternatives: The Panasonic ERA-6ARB122V and ERA-6ARW122V provide AEC-Q200 qualified alternatives with active product status. The ERA-6ARW122V offers ±0.05% tolerance matching the tightest Susumu N-series specifications. The YAGEO RT0805WRB071K2L provides ±0.05% tolerance with active status, though without explicit anti-sulfur coating specification.

Selection Criteria:

For direct replacement in existing designs: RG2012N-122-B-T5
For improved thermal stability: RG2012V-122-B-T5 or RG2012V-122-P-T1
For cross-manufacturer sourcing: ERA-6ARB122V or ERA-6ARW122V
All listed substitutes maintain ROHS3 compliance, AEC-Q200 automotive qualification, and MSL 1 rating

Frequently Asked Questions (FAQ)

Q: Can RG2012N-122-B-T5 be used as a direct replacement for RG2012N-122-C-T5?

A: Yes. Both parts share identical resistance (1.2 kOhms), power rating (0.125W), package (0805), operating temperature range (-55°C ~ 155°C), and temperature coefficient (±10ppm/°C). The RG2012N-122-B-T5 features tighter tolerance (±0.1% vs. ±0.25%), which is compatible with applications designed for the original part.

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

A: The primary difference is temperature coefficient. RG2012N series parts have ±10ppm/°C, while RG2012V series parts have ±5ppm/°C. Both series maintain identical resistance, power rating, package, and operating temperature range. The V-series provides superior thermal stability for precision applications.

Q: Are Panasonic ERA-6ARB122V and ERA-6ARW122V compatible with the original RG2012N-122-C-T5?

A: Yes. Both Panasonic parts maintain the required 1.2 kOhms resistance, 0.125W power rating, 0805 package, and -55°C ~ 155°C operating range. Both are AEC-Q200 qualified. The ERA-6ARW122V offers ±0.05% tolerance, while ERA-6ARB122V offers ±0.1% tolerance. Physical height differs slightly (0.024" vs. 0.020" maximum seated height) but remains within standard PCB assembly tolerances.

Q: Can the YAGEO RT0805WRB071K2L replace the RG2012N-122-C-T5?

A: Yes. The YAGEO part maintains all critical electrical parameters: 1.2 kOhms resistance, 0.125W power rating, 0805 package, -55°C ~ 155°C operating range, and ±10ppm/°C temperature coefficient. The part is ROHS3 compliant and active. Note that anti-sulfur coating is not specified for this part.

Q: What does tolerance mean in resistor selection?

A: Tolerance specifies the maximum deviation of actual resistance from the nominal value. The RG2012N-122-C-T5 has ±0.25% tolerance, meaning the actual resistance can vary by up to 0.25% from 1.2 kOhms. Substitute parts with tighter tolerance (lower percentage) provide more precise resistance values and are fully compatible with applications designed for the original part.

Q: Are all listed substitutes automotive-qualified?

A: The Susumu RG series and Panasonic ERA-6A series parts are all AEC-Q200 qualified. The YAGEO RT0805WRB071K2L does not list explicit AEC-Q200 qualification in the provided specifications. For automotive applications requiring AEC-Q200 compliance, use Susumu or Panasonic alternatives.

Q: What is MSL 1 rating and why does it matter?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life with no moisture precautions required. All listed parts carry MSL 1 rating, eliminating moisture-related handling and storage concerns during component procurement and assembly.

Q: Can I use a higher tolerance part in place of a lower tolerance part?

A: No. Substitution requires equal or tighter (lower) tolerance. A ±0.25% part cannot replace a ±0.05% part. However, a ±0.05% part can replace a ±0.25% part, as it provides superior precision.

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