RG1608P-124-C-T5 Equivalent & Substitute Parts

Part Overview

The RG1608P-124-C-T5 is a 120 kOhms ±0.25% thin film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Susumu, this component features anti-sulfur coating and automotive AEC-Q200 qualification. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility while offering active product status and improved specifications where applicable.

Key Parameters

Parameter	Value
Resistance	120 kOhms
Tolerance	±0.25%
Power Rating	0.1W (1/10W)
Package	0603 (1608 Metric)
Composition	Thin Film
Operating Temperature Range	-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 of the RG1608P-124-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 120 kOhms (exact match required)
Package type: 0603 (1608 Metric) (exact match required)
Power rating: 0.1W minimum (equal or greater acceptable)
Composition: Thin Film (required for performance characteristics)
Operating temperature range: -55°C to 155°C minimum (equal or greater range acceptable)

Substitution Flexibility Parameters:

Tolerance: ±0.25% or tighter (±0.1%, ±0.05% acceptable as upgrades)
Temperature coefficient: ±25ppm/°C or lower (±10ppm/°C acceptable as upgrade)
Automotive qualification: AEC-Q200 preferred for equivalent applications
Packaging format: Tape & Reel (TR) acceptable for production environments

Substitute parts are classified as either direct equivalents (matching all primary specifications) or upgrades (improved tolerance or temperature coefficient while maintaining core electrical and mechanical compatibility).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	AEC-Q200	Product Status
RG1608P-124-C-T5	Susumu	120 kOhms	±0.25%	0.1	±25	-55 ~ 155	0603	Yes	Obsolete
RG1608P-124-B-T5	Susumu	120 kOhms	±0.1%	0.1	±25	-55 ~ 155	0603	Yes	Active
RG1608N-124-B-T5	Susumu	120 kOhms	±0.1%	0.1	±10	-55 ~ 155	0603	Yes	Active
RG1608N-124-W-T5	Susumu	120 kOhms	±0.05%	0.1	±10	-55 ~ 155	0603	Yes	Active
RG1608P-124-W-T1	Susumu	120 kOhms	±0.05%	0.1	±25	-55 ~ 155	0603	Yes	Active
RT0603BRD07120KL	YAGEO	120 kOhms	±0.1%	0.1	±25	-55 ~ 155	0603	No	Active
RT0603CRD07120KL	YAGEO	120 kOhms	±0.25%	0.1	±25	-55 ~ 155	0603	No	Active
ERA-3AEB124V	Panasonic Electronic Components	120 kOhms	±0.1%	0.1	±25	-55 ~ 155	0603	Yes	Active
MCT06030D1203BP500	Vishay Beyschlag/Draloric/BC Components	120 kOhms	±0.1%	0.1	±25	-55 ~ 125	0603	No	Active

Engineering Selection Recommendations

Primary Recommendation: RG1608P-124-B-T5 (Susumu)

The RG1608P-124-B-T5 is the preferred substitute for the obsolete RG1608P-124-C-T5. Both components are manufactured by Susumu within the RG series, maintaining design continuity and supply chain consistency. The RG1608P-124-B-T5 offers improved tolerance (±0.1% versus ±0.25%) while retaining identical temperature coefficient (±25ppm/°C), operating temperature range (-55°C ~ 155°C), and automotive AEC-Q200 qualification. The 0603 package, power rating, and thin film composition are identical. Product status is active with substantial inventory availability (181,904 units).

Secondary Recommendation: RG1608N-124-B-T5 (Susumu)

The RG1608N-124-B-T5 provides enhanced performance with ±0.1% tolerance and superior temperature coefficient (±10ppm/°C versus ±25ppm/°C). This component maintains all other specifications including AEC-Q200 automotive qualification and active product status. Selection of this part is appropriate when improved temperature stability is required within the application circuit.

Tertiary Recommendation: ERA-3AEB124V (Panasonic Electronic Components)

The ERA-3AEB124V offers ±0.1% tolerance with automotive AEC-Q200 qualification and active product status. Operating temperature range (-55°C ~ 155°C) and all mechanical specifications match the original part. This option provides cross-manufacturer compatibility while maintaining automotive-grade specifications. Inventory availability is high (24,446 units).

Alternative Recommendation: RT0603BRD07120KL (YAGEO)

The RT0603BRD07120KL is a direct electrical equivalent with ±0.1% tolerance and ±25ppm/°C temperature coefficient. This YAGEO component maintains the 0603 package and 0.1W power rating. However, automotive AEC-Q200 qualification is not specified for this part. Selection is appropriate for non-automotive applications or where AEC-Q200 certification is not required. Inventory availability is substantial (17,906 units).

Not Recommended: MCT06030D1203BP500 (Vishay Beyschlag/Draloric/BC Components)

While the MCT06030D1203BP500 meets electrical specifications with ±0.1% tolerance, the maximum operating temperature is limited to 125°C, which does not satisfy the original part's -55°C ~ 155°C range. This component is suitable only for applications with reduced upper temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the RG1608P-124-C-T5 be directly replaced with any of the listed substitutes?

A: Yes, all listed substitute parts maintain the 120 kOhms resistance value, 0.1W power rating, and 0603 package format. Electrical and mechanical compatibility is confirmed for all substitutes. Selection should be based on tolerance requirements, temperature coefficient specifications, and automotive qualification needs.

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

A: The RG1608P series exhibits a temperature coefficient of ±25ppm/°C, while the RG1608N series provides improved stability at ±10ppm/°C. Both series maintain identical resistance values, power ratings, and package formats. The N-series is appropriate for applications requiring superior temperature stability.

Q: Does tolerance improvement from ±0.25% to ±0.1% or ±0.05% affect circuit performance?

A: Tolerance specifications define the manufacturing accuracy of the resistance value. Tighter tolerances (±0.1%, ±0.05%) ensure the actual resistance value remains closer to the nominal 120 kOhms specification. Selection of improved tolerance is appropriate when circuit performance depends on precise resistance values.

Q: Is automotive AEC-Q200 qualification required for all applications?

A: AEC-Q200 qualification is mandatory for automotive and safety-critical applications. For general industrial or consumer electronics applications, non-qualified alternatives such as the RT0603BRD07120KL are acceptable. Verify application requirements before selecting non-qualified components.

Q: What is the significance of the operating temperature range difference in the MCT06030D1203BP500?

A: The MCT06030D1203BP500 specifies a maximum operating temperature of 125°C, compared to 155°C for the original part and most substitutes. This component is incompatible with applications requiring the full -55°C ~ 155°C temperature range. Verify application temperature requirements before selection.

Q: Can Tape & Reel (TR) packaging be used interchangeably with other packaging formats?

A: Tape & Reel packaging is standard for automated assembly environments and is mechanically compatible with standard pick-and-place equipment. All listed substitutes are available in Tape & Reel format, ensuring compatibility with production processes.

Q: What inventory considerations should guide substitute part selection?

A: The RG1608P-124-B-T5 offers the highest inventory availability (181,904 units), followed by RT0603BRD07120KL (17,906 units) and ERA-3AEB124V (24,446 units). Inventory levels support long-term supply chain continuity for high-volume applications.

Q: Are there performance differences between Susumu, YAGEO, Panasonic, and Vishay thin film resistors?

A: All listed manufacturers produce thin film chip resistors meeting the specified electrical parameters. Selection among manufacturers should be based on automotive qualification requirements, temperature coefficient specifications, and supply chain preferences. No performance differences exist for applications within the specified parameter ranges.

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