RG1608P-4122-C-T5 Equivalent & Substitute Parts

Part Overview

The RG1608P-4122-C-T5 is a 41.2 kOhms ±0.25% thin film chip resistor in 0603 (1608 Metric) package rated for 0.1W (1/10W) power dissipation. Manufactured by Susumu, this component features anti-sulfur coating and automotive AEC-Q200 qualification, suitable for high-reliability applications across -55°C to 155°C operating temperature range. The part is currently obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Resistance	41.2 kOhms
Tolerance	±0.25%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thin Film
Operating Temperature	-55°C ~ 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 eligibility for the RG1608P-4122-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 41.2 kOhms (exact match required)
Package / Case: 0603 (1608 Metric) (physical and electrical footprint compatibility)
Power rating: 0.1W minimum (1/10W or higher)
Composition: Thin Film (electrical performance characteristics)
Operating temperature range: -55°C to 155°C minimum (full range coverage)

Tolerance Considerations: Substitutes with equal or tighter tolerance (±0.25% or better) maintain or improve circuit performance. Parts with ±0.1% or ±0.05% tolerance provide enhanced precision without functional degradation.

Temperature Coefficient: The original part specifies ±25ppm/°C. Substitutes with ±10ppm/°C or ±25ppm/°C maintain thermal stability within acceptable parameters.

Compliance & Features: AEC-Q200 automotive qualification and anti-sulfur coating are desirable for reliability-critical applications but not mandatory for functional substitution. ROHS3 compliance is maintained across all listed alternatives.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	AEC-Q200	Product Status
RG1608P-4122-C-T5	Susumu	41.2 kΩ	±0.25%	0.1	±25	-55 ~ 155	Yes	Obsolete
RG1608N-4122-B-T5	Susumu	41.2 kΩ	±0.1%	0.1	±10	-55 ~ 155	Yes	Active
RG1608N-4122-W-T1	Susumu	41.2 kΩ	±0.05%	0.1	±10	-55 ~ 155	Yes	Active
RG1608P-4122-B-T5	Susumu	41.2 kΩ	±0.1%	0.1	±25	-55 ~ 155	Yes	Active
RG1608P-4122-W-T1	Susumu	41.2 kΩ	±0.05%	0.1	±25	-55 ~ 155	Yes	Active
5-2176089-5	TE Connectivity	41.2 kΩ	±0.1%	0.167	±25	-55 ~ 155	No	Active
RT0603CRD0741K2L	YAGEO	41.2 kΩ	±0.25%	0.1	±25	-55 ~ 155	No	Active
ERA-3AEB4122V	Panasonic	41.2 kΩ	±0.1%	0.1	±25	-55 ~ 155	Yes	Active
MCT06030D4122BP500	Vishay Beyschlag	41.2 kΩ	±0.1%	0.1	±25	-55 ~ 125	No	Active
RT0603BRD0741K2L	YAGEO	41.2 kΩ	±0.1%	0.1	±25	-55 ~ 155	No	Active

Engineering Selection Recommendations

Primary Recommendation - Susumu RG Series (Same Manufacturer):

The Susumu RG1608P-4122-B-T5 and RG1608N-4122-B-T5 are direct Susumu alternatives with active product status. Both maintain the 0603 package, 41.2 kOhms resistance, 0.1W power rating, and full -55°C to 155°C operating range. The RG1608P-4122-B-T5 offers ±0.1% tolerance with 24,204 units in stock, providing superior availability and improved tolerance over the obsolete RG1608P-4122-C-T5. The RG1608N-4122-B-T5 provides ±0.1% tolerance with enhanced ±10ppm/°C temperature coefficient, suitable for precision applications.

Secondary Recommendation - Panasonic ERA-3AEB4122V:

The ERA-3AEB4122V maintains AEC-Q200 automotive qualification matching the original part's reliability requirements. It delivers ±0.1% tolerance, 0.1W power rating, and full -55°C to 155°C operating range with 15,316 units in stock. This part is suitable for automotive and high-reliability applications requiring AEC-Q200 compliance.

Alternative Recommendation - YAGEO RT0603BRD0741K2L:

The RT0603BRD0741K2L provides ±0.1% tolerance, 0.1W power rating, and -55°C to 155°C operating range with the highest inventory availability (54,337 units). This part is suitable for general-purpose applications where AEC-Q200 qualification is not required.

Conditional Recommendation - TE Connectivity 5-2176089-5:

The 5-2176089-5 offers ±0.1% tolerance and higher power rating (0.167W / 1/6W), providing thermal margin. However, the operating temperature range extends only to 125°C, limiting use in applications requiring full -55°C to 155°C coverage. This part is suitable for applications with maximum operating temperature of 125°C or lower.

Not Recommended - Vishay MCT06030D4122BP500:

The MCT06030D4122BP500 has a reduced operating temperature maximum of 125°C, which does not meet the full -55°C to 155°C requirement of the original specification. This part is suitable only for applications with maximum operating temperature of 125°C or lower.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with tighter tolerance than the original RG1608P-4122-C-T5?

A: Yes. The original part specifies ±0.25% tolerance. Substitutes with ±0.1% or ±0.05% tolerance provide equal or improved circuit performance without functional degradation. Tighter tolerance reduces component variation and improves circuit stability.

Q: What is the difference between RG1608P and RG1608N series from Susumu?

A: Both series are thin film 0603 package resistors with 41.2 kOhms resistance and 0.1W power rating. The primary difference is temperature coefficient: RG1608P series has ±25ppm/°C while RG1608N series has ±10ppm/°C. The RG1608N series provides superior thermal stability for precision applications.

Q: Is the 0603 package physically identical across all manufacturers?

A: The 0603 (1608 Metric) package is standardized, ensuring physical footprint compatibility across all listed substitutes. Dimensional variations are minimal (length 1.55mm to 1.60mm, width 0.80mm to 0.85mm, height 0.50mm to 0.55mm) and do not affect PCB assembly or electrical performance.

Q: Why does the TE Connectivity 5-2176089-5 have higher power rating (0.167W) than the original?

A: The 5-2176089-5 is rated for 1/6W (0.167W) compared to the original 1/10W (0.1W). Higher power rating indicates greater thermal dissipation capability. This part is suitable for applications with the same or lower power dissipation requirements as the original.

Q: Can I use RT0603CRD0741K2L instead of RT0603BRD0741K2L?

A: Both YAGEO RT series parts have identical electrical specifications (41.2 kOhms, ±0.25% tolerance, 0.1W, -55°C to 155°C). The RT0603CRD0741K2L matches the original tolerance exactly, while RT0603BRD0741K2L offers improved ±0.1% tolerance. Either part is functionally compatible; selection depends on tolerance requirements and availability.

Q: Which substitute is best for automotive applications?

A: For automotive applications requiring AEC-Q200 qualification, select either the Susumu RG1608P-4122-B-T5 or Panasonic ERA-3AEB4122V. Both maintain AEC-Q200 automotive rating, anti-sulfur coating (Susumu), and full -55°C to 155°C operating range matching the original part's reliability requirements.

Q: What is the impact of different temperature coefficients on circuit performance?

A: Temperature coefficient (ppm/°C) specifies resistance change per degree Celsius. The original ±25ppm/°C means resistance changes approximately 0.0025% per °C. Substitutes with ±10ppm/°C (Susumu RG1608N series) provide tighter temperature stability, reducing resistance drift across the operating range. This is beneficial for precision analog circuits but not critical for digital applications.

Q: Is ROHS3 compliance maintained across all substitutes?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental and regulatory requirements.

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