RG2012P-4122-B-T1 Equivalent & Substitute Parts

Part Overview

The RG2012P-4122-B-T1 is a 41.2 kOhms ±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 requiring high tolerance and temperature stability across -55°C to 155°C operating range.

The RG2012P-4122-B-T1 is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with identical or enhanced electrical and mechanical specifications, ensuring design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Resistance	41.2 kOhms
Tolerance	±0.1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Features	Anti-Sulfur, Automotive AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 41.2 kOhms
Package / Case: 0805 (2012 Metric)
Composition: Thin Film
Tolerance: ±0.1% or tighter (±0.05%)
Power Rating: 0.125W (1/8W) or higher
Operating Temperature Range: Must encompass -55°C to 155°C or equivalent
RoHS Status: ROHS3 Compliant

Acceptable Variations:

Temperature Coefficient: ±25ppm/°C or tighter (±10ppm/°C)
Tolerance: Tighter tolerance (±0.05%) is acceptable as an upgrade
Power Rating: Higher power rating (0.25W, 0.26W) is acceptable
Automotive Certification: AEC-Q200 qualification is preferred but not mandatory for non-automotive applications
Anti-Sulfur Feature: Present in most substitutes; absence does not disqualify

Substitute parts are grouped into two categories: direct equivalents (identical electrical specifications) and upgrades (enhanced tolerance or temperature coefficient).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	AEC-Q200	Product Status
RG2012P-4122-B-T1	Susumu	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 155	Yes	Obsolete
RG2012P-4122-B-T5	Susumu	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 155	Yes	Active
RG2012N-4122-B-T5	Susumu	41.2 kΩ	±0.1%	0.125	±10	-55 ~ 155	Yes	Active
RG2012N-4122-W-T1	Susumu	41.2 kΩ	±0.05%	0.125	±10	-55 ~ 155	Yes	Active
RG2012P-4122-W-T5	Susumu	41.2 kΩ	±0.05%	0.125	±25	-55 ~ 155	Yes	Active
ERA-6AEB4122V	Panasonic Electronic Components	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 155	Yes	Active
RT0805BRD0741K2L	YAGEO	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 155	No	Active
MCU08050D4122BP100	Vishay Beyschlag/Draloric/BC Components	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 125	No	Active
MCU08050D4122BP500	Vishay Beyschlag/Draloric/BC Components	41.2 kΩ	±0.1%	0.125	±25	-55 ~ 125	No	Active
TNPW080541K2BEEA	Vishay Dale	41.2 kΩ	±0.1%	0.26	±25	-55 ~ 175	Yes	Active
5-2176093-9	TE Connectivity Passive Product	41.2 kΩ	±0.1%	0.25	±25	-55 ~ 155	No	Active

Engineering Selection Recommendations

Direct Equivalent (Same Specifications, Active Status):

RG2012P-4122-B-T5 (Susumu) is the direct equivalent replacement. Identical electrical and mechanical specifications with active product status and equivalent packaging (Tape & Reel). Recommended for immediate substitution in existing designs.

ERA-6AEB4122V (Panasonic Electronic Components) provides direct equivalence with automotive AEC-Q200 certification, active status, and extended supply availability (13,865 units in stock). Suitable for automotive and precision applications.

RT0805BRD0741K2L (YAGEO) matches all electrical specifications with active status and high inventory (8,137 units). Lacks AEC-Q200 certification; suitable for non-automotive applications.

Enhanced Specifications (Upgrades):

RG2012N-4122-B-T5 (Susumu) provides improved temperature coefficient (±10ppm/°C vs. ±25ppm/°C) while maintaining all other specifications. Recommended for applications requiring superior temperature stability.

RG2012N-4122-W-T1 (Susumu) offers tighter tolerance (±0.05% vs. ±0.1%) and improved temperature coefficient (±10ppm/°C). Recommended for precision measurement and calibration circuits.

RG2012P-4122-W-T5 (Susumu) provides tighter tolerance (±0.05%) with active status. Suitable for applications requiring enhanced accuracy.

Higher Power Rating Alternatives:

TNPW080541K2BEEA (Vishay Dale) provides 0.26W power rating with extended operating temperature range (-55°C to 175°C), automotive AEC-Q200 certification, and anti-sulfur coating. Recommended for applications with higher thermal dissipation requirements.

5-2176093-9 (TE Connectivity Passive Product) offers 0.25W power rating with active status and high inventory. Suitable for applications requiring increased power handling.

Limited Temperature Range:

MCU08050D4122BP100 and MCU08050D4122BP500 (Vishay Beyschlag/Draloric/BC Components) operate to 125°C maximum, below the original specification of 155°C. Use only in applications with maximum operating temperature not exceeding 125°C.

Frequently Asked Questions (FAQ)

Q: Can RG2012P-4122-B-T5 directly replace RG2012P-4122-B-T1?

A: Yes. RG2012P-4122-B-T5 is a direct equivalent with identical electrical specifications (41.2 kΩ ±0.1%, 0.125W, ±25ppm/°C, -55°C to 155°C). The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. bulk). No circuit modifications are required.

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

A: The RG2012N series provides improved temperature coefficient (±10ppm/°C) compared to RG2012P (±25ppm/°C). Both maintain identical resistance, tolerance, power rating, and package. RG2012N is recommended for applications requiring superior temperature stability.

Q: Can I use a ±0.05% tolerance part in place of ±0.1%?

A: Yes. Tighter tolerance is a specification upgrade and is fully compatible. Parts such as RG2012N-4122-W-T1 and RG2012P-4122-W-T5 with ±0.05% tolerance can replace ±0.1% specifications without circuit modification.

Q: Are there differences between Tape & Reel and bulk packaging?

A: Tape & Reel (TR) packaging is standard for automated assembly. Bulk packaging is used for manual assembly or small-quantity applications. Electrical and mechanical specifications are identical. Packaging format affects handling and assembly process only.

Q: Why do some substitutes have higher power ratings (0.25W, 0.26W)?

A: Higher power ratings indicate improved thermal performance and greater margin for thermal dissipation. These parts are fully compatible and recommended for applications with higher power dissipation requirements or thermal stress conditions.

Q: Can I use MCU08050D4122BP series if my application operates above 125°C?

A: No. MCU08050D4122BP series is rated to 125°C maximum, below the original specification of 155°C. Use only in applications with maximum operating temperature not exceeding 125°C. For full temperature range compatibility, select parts rated to 155°C or higher.

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

A: AEC-Q200 certification is mandatory for automotive applications. For non-automotive industrial, consumer, or commercial applications, AEC-Q200 is not required. Parts without AEC-Q200 (such as RT0805BRD0741K2L) are suitable for non-automotive use.

Q: What is the difference between anti-sulfur and standard thin film resistors?

A: Anti-sulfur coating protects against sulfur contamination in high-sulfur environments. Standard thin film resistors lack this protection. Anti-sulfur variants are recommended for automotive and industrial applications; standard variants are suitable for controlled environments.

Q: Can TNPW080541K2BEEA replace RG2012P-4122-B-T1 in all applications?

A: TNPW080541K2BEEA is electrically compatible with higher power rating (0.26W vs. 0.125W) and extended temperature range (-55°C to 175°C vs. -55°C to 155°C). It is a suitable replacement with enhanced thermal performance. Physical dimensions differ slightly (height 0.022" vs. 0.020"), which may affect PCB layout in space-constrained designs.

Q: What inventory levels are available for each substitute?

A: Inventory varies by part number. ERA-6AEB4122V has the highest availability (13,865 units), followed by RT0805BRD0741K2L (8,137 units). Susumu RG series parts range from 713 to 997 units. Verify current inventory with supplier before design commitment.

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