RG2012P-4221-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012P-4221-C-T5 is a 4.22 kOhms ±0.25% 0.125W (1/8W) chip resistor in 0805 (2012 Metric) package manufactured by Susumu. This thin film, anti-sulfur automotive-grade component meets AEC-Q200 specifications and operates across -55°C to 155°C. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Resistance	4.22 kOhms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thin Film
Operating Temperature	-55°C to 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 of the RG2012P-4221-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 4.22 kOhms (exact match required)
Package type: 0805 (2012 Metric) (physical and electrical footprint compatibility)
Power rating: 0.125W minimum (1/8W or higher acceptable)
Operating temperature range: -55°C to 155°C minimum (full range or equivalent)
Composition: Thin film (electrical performance characteristics)

Acceptable Variation Parameters:

Tolerance: ±0.25% or tighter (lower tolerance values are direct upgrades)
Temperature coefficient: ±25ppm/°C or lower (lower values are direct upgrades)
Automotive rating: AEC-Q200 preferred for automotive applications; non-automotive alternatives acceptable for non-critical applications
Packaging format: Tape & Reel (TR) or bulk acceptable

Substitute parts are classified as Upgrade when they offer improved tolerance, lower temperature coefficient, or active product status while maintaining all mandatory parameters. Direct substitutes maintain equivalent electrical specifications with different manufacturers or packaging.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	AEC-Q200	Status
RG2012P-4221-C-T5	Susumu	4.22 kΩ	±0.25%	0.125	±25	-55 to 155	Yes	Obsolete
RG2012N-4221-B-T5	Susumu	4.22 kΩ	±0.1%	0.125	±10	-55 to 155	Yes	Active
RG2012N-4221-W-T1	Susumu	4.22 kΩ	±0.05%	0.125	±10	-55 to 155	Yes	Active
RG2012P-4221-B-T5	Susumu	4.22 kΩ	±0.1%	0.125	±25	-55 to 155	Yes	Active
RG2012P-4221-W-T5	Susumu	4.22 kΩ	±0.05%	0.125	±25	-55 to 155	Yes	Active
RG2012V-4221-B-T5	Susumu	4.22 kΩ	±0.1%	0.125	±5	-55 to 155	Yes	Active
RG2012V-4221-P-T1	Susumu	4.22 kΩ	±0.02%	0.125	±5	-55 to 155	Yes	Active
RG2012V-4221-W-T1	Susumu	4.22 kΩ	±0.05%	0.125	±5	-55 to 155	Yes	Active
RG2012V-4221-W-T5	Susumu	4.22 kΩ	±0.05%	0.125	±5	-55 to 155	Yes	Active
7-2176092-2	TE Connectivity	4.22 kΩ	±0.1%	0.25	±25	-55 to 155	No	Active
RT0805CRD074K22L	YAGEO	4.22 kΩ	±0.25%	0.125	±25	-55 to 155	No	Active

Engineering Selection Recommendations

Primary Upgrade Path (Susumu RG Series):

For applications requiring active product status with maintained AEC-Q200 automotive compliance, the Susumu RG2012P-4221-B-T5 provides direct functional equivalence with improved tolerance (±0.1% versus ±0.25%) while retaining identical temperature coefficient and power rating. This part is in active production with 4125 units in stock.

For applications requiring superior tolerance and temperature stability, the RG2012V series offers progressively tighter specifications. The RG2012V-4221-B-T5 reduces temperature coefficient to ±5ppm/°C with ±0.1% tolerance. The RG2012V-4221-P-T1 achieves ±0.02% tolerance with ±5ppm/°C temperature coefficient for precision applications.

Alternative Manufacturer Options:

The YAGEO RT0805CRD074K22L maintains identical electrical specifications (4.22 kΩ ±0.25%, 0.125W, ±25ppm/°C) in 0805 package with active status. This part does not carry AEC-Q200 rating and is suitable for non-automotive applications.

The TE Connectivity 7-2176092-2 provides 4.22 kΩ ±0.1% in 0805 package with doubled power rating (0.25W) and active status. This part lacks AEC-Q200 certification and is suitable for general industrial applications where higher power dissipation capacity is beneficial.

Compliance Considerations:

All Susumu RG series substitutes maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and REACH unaffected status. The TE Connectivity and YAGEO alternatives maintain ROHS3 compliance with equivalent environmental ratings.

Frequently Asked Questions (FAQ)

Q: Can RG2012P-4221-B-T5 directly replace RG2012P-4221-C-T5 in automotive applications?

A: Yes. Both parts are 4.22 kΩ ±0.25% minimum (B-T5 is ±0.1%), 0.125W, 0805 package, AEC-Q200 rated, with identical operating temperature range (-55°C to 155°C). The B-T5 variant offers tighter tolerance as an upgrade. Footprint and electrical performance are compatible.

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

A: The RG2012V series offers superior temperature coefficient (±5ppm/°C) compared to RG2012P (±25ppm/°C). Both series maintain identical resistance, power rating, package, and AEC-Q200 compliance. Selection depends on temperature stability requirements.

Q: Is the TE Connectivity 7-2176092-2 suitable as a replacement?

A: The 7-2176092-2 maintains 4.22 kΩ ±0.1% resistance, 0805 package, and -55°C to 155°C operating range. However, it lacks AEC-Q200 automotive certification and provides doubled power rating (0.25W versus 0.125W). Use in non-automotive applications or where higher power dissipation is acceptable.

Q: Why does the YAGEO RT0805CRD074K22L have a different part number structure?

A: YAGEO uses different nomenclature conventions. The RT0805CRD074K22L specifies 4.22 kΩ ±0.25% 0.125W in 0805 package with identical electrical performance to the original part. The alphanumeric suffix indicates YAGEO's internal coding system rather than functional differences.

Q: Can I use a higher tolerance part (±0.1%) where ±0.25% is specified?

A: Yes. Tighter tolerance (lower percentage value) is always acceptable as a direct upgrade. A ±0.1% part meets all requirements of a ±0.25% specification with improved accuracy.

Q: What is the impact of temperature coefficient differences?

A: Temperature coefficient indicates resistance change per degree Celsius. Lower values (±5ppm/°C versus ±25ppm/°C) provide greater stability across the operating temperature range. Selection depends on circuit sensitivity to resistance variation over temperature.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are available in Tape & Reel (TR) packaging suitable for automated assembly. The original RG2012P-4221-C-T5 was supplied in bulk; active substitutes standardize on TR packaging for production efficiency.

Q: Does package height variation affect PCB assembly?

A: All parts maintain 0805 (2012 Metric) package designation with maximum seated heights between 0.020" (0.50mm) and 0.026" (0.65mm). These variations are within standard PCB assembly tolerances and do not affect reflow soldering or component placement.

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