RG2012N-4121-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012N-4121-C-T5 is a 4.12 kOhms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. This component is designed for automotive applications and carries AEC-Q200 qualification with anti-sulfur construction. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering active product status and improved performance characteristics where applicable.

Key Parameters

Parameter	Value
Resistance	4.12 kOhms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thin Film
Features	Anti-Sulfur, Automotive AEC-Q200
Operating Temperature Range	-55°C ~ 155°C
Temperature Coefficient	±10ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012N-4121-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 4.12 kOhms (exact match required)
Package type: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Automotive rating: AEC-Q200 (exact match required)
Anti-sulfur construction (exact match required)

Allowable Variation Parameters:

Tolerance: Can be equal to or tighter than ±0.25%
Power rating: Can be equal to or greater than 0.125W
Temperature coefficient: Can be equal to or lower in absolute value
Operating temperature range: Can be equal to or wider than -55°C ~ 155°C
Product status: Active status preferred over obsolete

All substitute parts listed maintain the mandatory parameters while offering improvements in tolerance, temperature coefficient stability, or power handling capability. The Vishay Dale TNPW08054K12BYEA provides increased power rating (0.26W) and extended upper operating temperature (175°C). Susumu RG2012V series variants offer superior temperature coefficient performance (±5ppm/°C) compared to the RG2012N series (±10ppm/°C).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Product Status	Packaging
RG2012N-4121-C-T5	Susumu	4.12 kΩ	±0.25%	0.125	±10	-55 ~ 155	Obsolete	Bulk
RG2012N-4121-B-T5	Susumu	4.12 kΩ	±0.1%	0.125	±10	-55 ~ 155	Active	Tape & Reel
RG2012N-4121-W-T1	Susumu	4.12 kΩ	±0.05%	0.125	±10	-55 ~ 155	Active	Tape & Reel
RG2012N-4121-W-T5	Susumu	4.12 kΩ	±0.05%	0.125	±10	-55 ~ 155	Active	Tape & Reel
RG2012V-4121-B-T5	Susumu	4.12 kΩ	±0.1%	0.125	±5	-55 ~ 155	Active	Tape & Reel
RG2012V-4121-P-T1	Susumu	4.12 kΩ	±0.02%	0.125	±5	-55 ~ 155	Active	Tape & Reel
RG2012V-4121-W-T1	Susumu	4.12 kΩ	±0.05%	0.125	±5	-55 ~ 155	Active	Tape & Reel
RG2012V-4121-W-T5	Susumu	4.12 kΩ	±0.05%	0.125	±5	-55 ~ 155	Active	Tape & Reel
TNPW08054K12BYEA	Vishay Dale	4.12 kΩ	±0.1%	0.26	±10	-55 ~ 175	Active	Tape & Reel

Engineering Selection Recommendations

Primary Selection Criteria:

All substitute parts maintain full electrical and mechanical compatibility with the RG2012N-4121-C-T5 through identical resistance value, package type, thin film composition, and AEC-Q200 automotive qualification. Selection among substitutes depends on application-specific requirements:

For Direct Replacement with Improved Tolerance: RG2012N-4121-B-T5 provides tighter tolerance (±0.1%) while maintaining identical temperature coefficient and operating range. This part is active and available in Tape & Reel packaging.

For Superior Tolerance Performance: RG2012N-4121-W-T1 and RG2012N-4121-W-T5 offer ±0.05% tolerance, suitable for precision analog circuits. Both are active with Tape & Reel packaging.

For Enhanced Temperature Stability: RG2012V series variants (RG2012V-4121-B-T5, RG2012V-4121-W-T1, RG2012V-4121-W-T5) feature ±5ppm/°C temperature coefficient compared to ±10ppm/°C of the original part, providing superior stability across the operating temperature range.

For Highest Precision Requirements: RG2012V-4121-P-T1 combines ±0.02% tolerance with ±5ppm/°C temperature coefficient, representing the most stringent specification available.

For Extended Temperature Operation: TNPW08054K12BYEA from Vishay Dale extends the upper operating temperature to 175°C and provides 0.26W power rating, accommodating higher thermal stress applications while maintaining ±0.1% tolerance and AEC-Q200 qualification.

All substitute parts carry ROHS3 compliance, MSL 1 rating, and REACH unaffected status, matching the regulatory profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can RG2012N-4121-C-T5 be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes maintain the mandatory parameters: 4.12 kOhms resistance, 0805 package, thin film composition, and AEC-Q200 automotive qualification. Electrical and mechanical compatibility is assured. Differences exist only in tolerance, temperature coefficient, and power rating, which represent improvements or expanded capability.

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

A: The RG2012V series offers superior temperature coefficient performance at ±5ppm/°C compared to RG2012N at ±10ppm/°C. Both series maintain identical resistance, package, and automotive ratings. RG2012V is preferred for applications requiring enhanced temperature stability.

Q: Why does TNPW08054K12BYEA have higher power rating?

A: TNPW08054K12BYEA is rated for 0.26W compared to 0.125W for Susumu parts. This reflects the Vishay Dale design and construction approach. The higher power rating does not affect compatibility; it simply indicates the component can dissipate more power without exceeding temperature limits. It is suitable for applications with higher power dissipation requirements.

Q: Are all substitutes available in the same packaging format?

A: The original RG2012N-4121-C-T5 is supplied in bulk packaging. All substitute parts are available in Tape & Reel (TR) format, which is standard for production environments. Tape & Reel packaging is compatible with automated assembly equipment and provides superior moisture protection during storage and handling.

Q: What tolerance should I select for my application?

A: Tolerance selection depends on circuit requirements. The original ±0.25% tolerance is suitable for general-purpose applications. Tighter tolerances (±0.1%, ±0.05%, ±0.02%) are required for precision analog circuits, reference networks, and measurement instrumentation where resistor accuracy directly impacts circuit performance.

Q: Is the extended temperature range of TNPW08054K12BYEA necessary?

A: The extended range to 175°C is beneficial only if your application operates at elevated temperatures. For standard automotive applications within -55°C to 155°C, Susumu substitutes are fully adequate. TNPW08054K12BYEA provides additional margin for high-temperature environments.

Q: Can I use RG2012V-4121-P-T1 in place of the original part?

A: Yes. RG2012V-4121-P-T1 is a direct substitute with superior specifications: ±0.02% tolerance and ±5ppm/°C temperature coefficient. It is fully compatible electrically and mechanically. Use this part when precision and temperature stability are critical design requirements.

Q: Are all substitutes AEC-Q200 qualified?

A: Yes. All substitute parts listed carry AEC-Q200 automotive qualification, anti-sulfur construction, and ROHS3 compliance, matching the regulatory and reliability requirements of the original component.

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