RMC1/8K3003FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8K3003FTP is a 300 kOhms ±1% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Kamaya Inc. This component is classified as Active product status with unlimited moisture sensitivity level (MSL 1). The RMC series represents a standard general-purpose resistor suitable for general circuit applications requiring stable resistance values across the operating temperature range of -55°C to 155°C. Substitute parts are necessary when primary inventory is unavailable, when specific certifications or features are required for particular applications, or when alternative manufacturers offer improved lead times or cost optimization.

Key Parameters

Parameter	Value	Specification Basis
Resistance Value	300 kOhms	Core electrical specification
Tolerance	±1%	Precision requirement
Power Rating	0.25W (1/4W)	Thermal dissipation capability
Package Type	1206 (3216 Metric)	Physical form factor and PCB footprint
Composition	Thick Film	Manufacturing technology
Temperature Coefficient	±100ppm/°C	Temperature stability
Operating Temperature Range	-55°C to 155°C	Environmental operating limits
Moisture Sensitivity Level	MSL 1 (Unlimited)	Handling and storage requirements
Number of Terminations	2	Component connectivity

Substitute Part Grouping Explanation

Substitution eligibility for the RMC1/8K3003FTP is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Resistance Value: 300 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power Rating: 0.25W / 1/4W (exact match required)
Package / Case: 1206 (3216 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C to 155°C (exact match required)
Moisture Sensitivity Level: MSL 1 (exact match required)

All five substitute parts listed meet these mandatory equivalence criteria. Variations in physical dimensions (length, width, height) within standard manufacturing tolerances, packaging format (Tape & Reel versus Cut Tape), and optional certifications (such as AEC-Q200 for automotive applications) do not disqualify substitution but may introduce additional capabilities or constraints depending on application requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Temp Range	MSL	Product Status	Features
RMC1/8K3003FTP	Kamaya Inc.	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Active	—
ERJ-8ENF3003V	Panasonic Electronic Components	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Not For New Designs	Automotive AEC-Q200
KTR18EZPF3003	Rohm Semiconductor	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Active	Automotive AEC-Q200, High Voltage
MCR18ERTF3003	Rohm Semiconductor	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Discontinued at DiGi Electronics	—
RC1206FR-07300KL	YAGEO	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Active	Moisture Resistant
RMCF1206FT300K	Stackpole Electronics Inc	300 kΩ	±1%	0.25	1206	Thick Film	±100ppm/°C	-55 to 155°C	1	Active	Automotive AEC-Q200

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

KTR18EZPF3003 (Rohm Semiconductor) and RMCF1206FT300K (Stackpole Electronics Inc) are recommended as primary substitutes. Both maintain Active product status, ensuring continued availability and manufacturer support. KTR18EZPF3003 includes High Voltage capability in addition to AEC-Q200 automotive qualification. RMCF1206FT300K carries AEC-Q200 certification suitable for automotive applications. RC1206FR-07300KL (YAGEO) is also Active status with Moisture Resistant feature, providing an alternative from a different manufacturer base.

Secondary Substitutes (Limited Availability):

ERJ-8ENF3003V (Panasonic Electronic Components) carries AEC-Q200 automotive qualification but is marked as Not For New Designs, indicating phase-out status. This part should be used only when existing inventory is available and new design adoption is not planned.

MCR18ERTF3003 (Rohm Semiconductor) is Discontinued at DiGi Electronics and should be avoided for new applications or long-term supply chain planning. This part is listed for reference only when legacy component replacement is required.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance, REACH Unaffected status, and identical ECCN (EAR99) and HTSUS (8533.21.0030) classifications as the main part. No regulatory or export restrictions differ between the main part and substitutes.

Frequently Asked Questions (FAQ)

Q: Can ERJ-8ENF3003V be used as a direct replacement for RMC1/8K3003FTP?

A: Yes, ERJ-8ENF3003V meets all mandatory electrical and mechanical equivalence parameters. However, its Not For New Designs status indicates Panasonic has discontinued active development. Use this part only when existing inventory is available and the application does not require long-term component availability guarantees.

Q: What is the difference between KTR18EZPF3003 and RMCF1206FT300K?

A: Both parts are electrically and mechanically equivalent with identical resistance, tolerance, power rating, and package specifications. KTR18EZPF3003 includes High Voltage capability as an additional feature. RMCF1206FT300K is manufactured by Stackpole Electronics. Selection between these two depends on supplier availability, lead time, and cost considerations rather than technical performance.

Q: Is RC1206FR-07300KL suitable for high-moisture environments?

A: RC1206FR-07300KL includes Moisture Resistant feature, which provides enhanced protection compared to standard thick film resistors. However, all listed parts maintain MSL 1 (Unlimited) rating, indicating they do not require special moisture-sensitive device handling. The Moisture Resistant designation on RC1206FR-07300KL represents an additional design feature rather than a requirement for use in humid conditions.

Q: Why is MCR18ERTF3003 listed if it is discontinued?

A: MCR18ERTF3003 is included for reference when legacy circuit board repairs or component replacement in existing equipment is required. For new designs or applications requiring long-term supply chain stability, use Active status alternatives such as KTR18EZPF3003, RMCF1206FT300K, or RC1206FR-07300KL.

Q: Are there any physical dimension differences that affect PCB layout?

A: Physical dimensions vary slightly within standard manufacturing tolerances. The main part RMC1/8K3003FTP measures 0.122" L × 0.063" W (3.10mm × 1.60mm) with 0.025" maximum seated height. Substitute parts measure 0.120" to 0.126" L × 0.061" to 0.063" W with seated heights ranging from 0.026" to 0.028". These variations fall within standard 1206 package tolerances and do not require PCB footprint redesign. Verify with your PCB design tool that all parts fit within the specified 1206 land pattern.

Q: Do all substitutes support the same operating temperature range?

A: Yes, all listed parts operate across the identical temperature range of -55°C to 155°C with ±100ppm/°C temperature coefficient. No thermal performance differences exist between the main part and substitutes.

Q: Which substitute should I choose for automotive applications?

A: For automotive applications, select either KTR18EZPF3003 or RMCF1206FT300K, both of which carry AEC-Q200 certification. ERJ-8ENF3003V also qualifies but is Not For New Designs. The RMC1/8K3003FTP main part does not carry AEC-Q200 certification.

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