Equivalent & Substitute Parts Reference: RMC1/8K45R3FTP

Part Overview

The Kamaya Inc. RMC1/8K45R3FTP is a 45.3 Ohm, ±1% tolerance, 0.25W (1/4W) thick film chip resistor in a 1206 (3216 Metric) surface-mount package. This model is active and available in Tape & Reel (TR) packaging. In practical design and manufacturing environments, it is necessary to identify substitute or equivalent chip resistors to ensure supply chain reliability, address product obsolescence, or meet specific compliance needs.

Key Parameters

Parameter	Value
Resistance	45.3 Ohms
Tolerance	±1%
Power (Watts)	0.25W, 1/4W
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature	-55°C ~ 155°C
Package / Case	1206 (3216 Metric)
Supplier Device Package	1206
Size / Dimension	0.122" L x 0.063" W (3.10mm x 1.60mm)
Height - Seated (Max)	0.025" (0.65mm)
Number of Terminations	2
Packaging	Tape & Reel (TR)

Substitute Part Grouping Explanation

Substitution logic for chip resistors in the 1206 (3216 Metric) package is strictly based on the following allowed parameters and attributes: resistance value, tolerance, power rating, composition, temperature coefficient, operating temperature range, mechanical dimensions (package/case, supplier device package, size/dimension, height seated), number of terminations, and packaging type. Equivalent and substitute parts must match these key electrical and mechanical criteria to ensure compatibility and reliable function in electronic assemblies.

Parameter Comparison

Part Number	Manufacturer	Resistance (Ohms)	Tolerance	Power (Watts)	Composition	Temp. Coefficient	Operating Temp.	Package / Case	Supplier Device Package	Size / Dimension	Height (Max)	Number of Terminations	Packaging	Product Status
RMC1/8K45R3FTP	Kamaya Inc.	45.3	±1%	0.25W, 1/4W	Thick Film	±100ppm/°C	-55°C ~ 155°C	1206 (3216 Metric)	1206	0.122" x 0.063" (3.10mm x 1.60mm)	0.025" (0.65mm)	2	Tape & Reel (TR)	Active
ERJ-8ENF45R3V	Panasonic Electronic Components	45.3	±1%	0.25W, 1/4W	Thick Film	±100ppm/°C	-55°C ~ 155°C	1206 (3216 Metric)	1206	0.126" x 0.063" (3.20mm x 1.60mm)	0.028" (0.70mm)	2	Tape & Reel (TR)	Not For New Designs
RC1206FR-0745R3L	YAGEO	45.3	±1%	0.25W, 1/4W	Thick Film	±100ppm/°C	-55°C ~ 155°C	1206 (3216 Metric)	1206	0.122" x 0.063" (3.10mm x 1.60mm)	0.026" (0.65mm)	2	Tape & Reel (TR)	Active
RMCF1206FT45R3	Stackpole Electronics Inc	45.3	±1%	0.25W, 1/4W	Thick Film	±100ppm/°C	-55°C ~ 155°C	1206 (3216 Metric)	1206	0.126" x 0.063" (3.20mm x 1.60mm)	0.028" (0.70mm)	2	Tape & Reel (TR)	Active

Engineering Selection Recommendations

Selection between RMC1/8K45R3FTP and its substitutes should be based on product status and certifications present in the provided attributes. All identified substitutes meet the tolerance, resistance, power rating, composition, and package requirements. Substitute chips with "Active" status are suitable for ongoing designs. Models with additional certifications, such as Automotive AEC-Q200 or ROHS3 compliance, should be matched to application needs if such criteria are required. Models with "Not For New Designs" status are for maintenance or replacement purposes only.

Frequently Asked Questions (FAQ)

Q1: What determines equivalency among 1206 chip resistors in this category?
Equivalency is determined by matching resistance value, tolerance, power rating, temperature coefficient, mechanical package size (1206 / 3216 Metric), composition, and supplier device package.

Q2: Is there any difference in reliability or qualification among substitutes?
Provided parameters indicate that some substitutes are Automotive AEC-Q200 qualified or ROHS3 compliant. Use only substitutes with the required certifications for specific regulated or automotive applications.

Q3: How critical is mechanical size for substitution in 1206 package chip resistors?
Mechanical dimensions (length, width, height) must closely match between the main part and substitute chips to ensure correct fit and automated placement. All listed substitutes are in the 1206 (3216 Metric) package.

Q4: Can alternate packaging types affect compatibility?
All substitutes listed use Tape & Reel (TR) packaging, ensuring compatibility with automated assembly processes corresponding to the main part.

Q5: Does the temperature coefficient matter for substitution?
All substitutes have a temperature coefficient of ±100ppm/°C, matching the main part. Matching temperature coefficient is necessary for consistent performance under varying environmental conditions.

Q6: Are all listed substitutes suitable for new designs?
Only substitute models with “Active” status are suitable for new designs. Models listed as "Not For New Designs" are intended for maintenance or replacement in existing assemblies.

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