RG2012P-1821-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012P-1821-C-T5 is a 1.82 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 temperature ranges from -55°C to 155°C. The part is currently obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility while meeting automotive and industrial standards.

Key Parameters

Parameter	Value	Specification Basis
Resistance Value	1.82 kOhms	Primary electrical characteristic
Tolerance	±0.25%	Accuracy specification
Power Rating	0.125W (1/8W)	Thermal dissipation limit
Package Type	0805 (2012 Metric)	Physical form factor
Composition	Thin Film	Manufacturing technology
Temperature Coefficient	±25ppm/°C	Stability over temperature
Operating Temperature Range	-55°C to 155°C	Environmental limits
Automotive Rating	AEC-Q200	Reliability qualification
Anti-Sulfur Feature	Yes	Environmental protection
RoHS Compliance	ROHS3 Compliant	Regulatory requirement

Substitute Part Grouping Explanation

Substitution of the RG2012P-1821-C-T5 is determined by strict adherence to the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 1.82 kOhms (exact match required)
Package type: 0805 (2012 Metric) (physical and electrical footprint compatibility)
Power rating: 0.125W minimum (thermal capability)
Operating temperature range: -55°C to 155°C minimum (environmental envelope)
Composition: Thin film (electrical performance characteristics)
RoHS compliance: ROHS3 Compliant (regulatory alignment)

Allowable Variation Parameters:

Tolerance: May be equal to or tighter than ±0.25% (improved accuracy acceptable)
Temperature coefficient: May be equal to or lower than ±25ppm/°C (improved stability acceptable)
Automotive rating: AEC-Q200 preferred; non-automotive alternatives acceptable if all other parameters met
Anti-sulfur feature: Preferred but not mandatory for non-corrosive environments
Packaging format: Tape & Reel (TR) acceptable as functional equivalent to cut tape

Substitute parts are grouped into two categories: Susumu RG series upgrades with improved tolerance and temperature coefficient specifications, and direct cross-reference alternatives from other manufacturers meeting identical electrical and mechanical requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	AEC-Q200	Status
RG2012P-1821-C-T5	Susumu	1.82 kΩ	±0.25%	0.125	±25	0805	Yes	Obsolete
RG2012N-1821-B-T5	Susumu	1.82 kΩ	±0.1%	0.125	±10	0805	Yes	Active
RG2012N-1821-W-T1	Susumu	1.82 kΩ	±0.05%	0.125	±10	0805	Yes	Active
RG2012P-1821-B-T5	Susumu	1.82 kΩ	±0.1%	0.125	±25	0805	Yes	Active
RG2012P-1821-W-T5	Susumu	1.82 kΩ	±0.05%	0.125	±25	0805	Yes	Active
RG2012V-1821-B-T5	Susumu	1.82 kΩ	±0.1%	0.125	±5	0805	Yes	Active
RG2012V-1821-P-T1	Susumu	1.82 kΩ	±0.02%	0.125	±5	0805	Yes	Active
RG2012V-1821-W-T1	Susumu	1.82 kΩ	±0.05%	0.125	±5	0805	Yes	Active
RG2012V-1821-W-T5	Susumu	1.82 kΩ	±0.05%	0.125	±5	0805	Yes	Active
4-2176092-0	TE Connectivity	1.82 kΩ	±0.1%	0.25	±25	0805	No	Active
RT0805CRD071K82L	YAGEO	1.82 kΩ	±0.25%	0.125	±25	0805	No	Active

Engineering Selection Recommendations

Primary Recommendation - Susumu RG Series Upgrades:

The Susumu RG2012P-1821-B-T5 and RG2012P-1821-W-T5 are direct functional upgrades to the obsolete RG2012P-1821-C-T5. Both maintain identical temperature coefficient (±25ppm/°C), power rating (0.125W), package (0805), and AEC-Q200 automotive qualification. The RG2012P-1821-B-T5 offers ±0.1% tolerance improvement, while RG2012P-1821-W-T5 provides ±0.05% tolerance. Both are active products with established supply availability.

For applications requiring superior temperature stability, the RG2012V series (RG2012V-1821-B-T5, RG2012V-1821-W-T1, RG2012V-1821-W-T5) reduces temperature coefficient to ±5ppm/°C while maintaining all other electrical and mechanical specifications. The RG2012V-1821-P-T1 achieves the tightest tolerance specification at ±0.02% with ±5ppm/°C temperature coefficient.

Secondary Recommendation - Cross-Manufacturer Alternatives:

The YAGEO RT0805CRD071K82L provides electrical equivalence with identical tolerance (±0.25%), power rating (0.125W), and temperature coefficient (±25ppm/°C). This part maintains full compatibility with the original specification and is actively manufactured.

The TE Connectivity 4-2176092-0 offers increased power rating (0.25W) in the same 0805 package with ±0.1% tolerance and ±25ppm/°C temperature coefficient. This part is suitable for applications where thermal margin is beneficial, though it lacks AEC-Q200 automotive qualification.

Compliance Considerations:

All recommended Susumu alternatives maintain ROHS3 compliance and AEC-Q200 automotive qualification. The YAGEO RT0805CRD071K82L maintains ROHS3 compliance with REACH Unaffected status. The TE Connectivity part maintains ROHS3 compliance with undefined REACH status. Selection should account for specific automotive or industrial certification requirements of the end application.

Frequently Asked Questions (FAQ)

Q: Can the RG2012P-1821-C-T5 be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes maintain the 1.82 kOhms resistance value, 0805 package form factor, 0.125W power rating minimum, and -55°C to 155°C operating temperature range. Direct footprint and functional replacement is possible without circuit redesign.

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

A: The RG2012N series reduces temperature coefficient from ±25ppm/°C to ±10ppm/°C, providing improved stability over temperature. Both series maintain identical tolerance options and power ratings. Selection depends on application sensitivity to temperature-induced resistance drift.

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

A: The RG2012V series achieves the lowest temperature coefficient at ±5ppm/°C, compared to ±25ppm/°C for RG2012P and ±10ppm/°C for RG2012N. The RG2012V series is recommended for precision analog circuits requiring minimal temperature-dependent resistance variation.

Q: Why does the TE Connectivity 4-2176092-0 have a higher power rating (0.25W vs 0.125W)?

A: The TE Connectivity part is manufactured with different thermal design characteristics, allowing higher power dissipation in the same 0805 package size. This provides additional thermal margin but does not affect electrical performance at equivalent power levels. The part is electrically compatible for applications using 0.125W or less.

Q: Are all substitutes AEC-Q200 qualified?

A: The Susumu RG series substitutes (RG2012N, RG2012P, RG2012V variants) all carry AEC-Q200 automotive qualification. The YAGEO RT0805CRD071K82L and TE Connectivity 4-2176092-0 do not carry AEC-Q200 qualification. For automotive applications requiring AEC-Q200 compliance, Susumu alternatives are required.

Q: What is the significance of the tolerance specification in substitution?

A: Tolerance defines the maximum allowable deviation from the nominal 1.82 kOhms resistance value. The original part specifies ±0.25%, meaning actual resistance falls between 1.8145 kΩ and 1.8255 kΩ. Tighter tolerances (±0.1%, ±0.05%, ±0.02%) reduce this range, improving circuit accuracy. Substitutes with equal or tighter tolerance are functionally compatible; looser tolerance substitutes are not acceptable.

Q: What is the significance of the temperature coefficient specification?

A: Temperature coefficient defines how resistance changes with temperature, expressed in ppm/°C (parts per million per degree Celsius). The original part specifies ±25ppm/°C, meaning resistance may drift up to 0.0025% per degree Celsius. Lower temperature coefficients (±10ppm/°C, ±5ppm/°C) reduce this drift, improving circuit stability across the -55°C to 155°C operating range. Substitutes with equal or lower temperature coefficient are functionally compatible.

Q: Can the RG2012P-1821-C-T5 be replaced with a higher tolerance part?

A: No. Substitutes must maintain tolerance equal to or tighter than ±0.25%. Parts with looser tolerance specifications do not meet the original electrical requirements and are not acceptable substitutes.

Q: Is packaging format (Tape & Reel vs cut tape) significant for substitution?

A: Packaging format affects supply and handling but not electrical or mechanical compatibility. The original part is supplied in cut tape format; all listed substitutes are supplied in Tape & Reel (TR) format. Both formats contain identical components and are functionally equivalent for circuit assembly.

Q: What is ROHS3 compliance and why is it important?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance certifies that the component contains no lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. All recommended substitutes maintain ROHS3 compliance, ensuring regulatory alignment with environmental and safety standards.

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