RMC1/8K4993FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8K4993FTP is a 499 kOhms ±1% 0.25W thick film chip resistor manufactured by Kamaya Inc. in 1206 (3216 Metric) package format. This component is classified as Active product status and is supplied in Tape & Reel (TR) packaging with 843 pieces currently in stock.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain optimization requires alternative sourcing, or when design specifications allow for functionally equivalent components from qualified manufacturers. All substitute parts listed maintain identical electrical specifications and package dimensions within specified tolerances.

Key Parameters

Parameter	Value
Resistance	499 kOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RMC1/8K4993FTP is determined by strict equivalence across the following parameters:

Core Electrical Parameters:

Resistance value: 499 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.25W / 1/4W (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)

Package & Physical Parameters:

Package type: 1206 (3216 Metric) (exact match required)
Composition: Thick Film (exact match required)
Terminations: 2 (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Regulatory & Compliance Parameters:

REACH Status: REACH Unaffected (all substitutes comply)
ECCN: EAR99 (all substitutes comply)
HTSUS: 8533.21.0030 (all substitutes comply)

All five substitute parts listed meet these criteria. Dimensional variations within supplier tolerances (length 0.122" to 0.126", height 0.025" to 0.028") do not affect functional equivalence in standard PCB assembly processes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Composition	Product Status	Packaging Type
RMC1/8K4993FTP	Kamaya Inc.	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Active	Tape & Reel (TR)
ERJ-8ENF4993V	Panasonic Electronic Components	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Not For New Designs	Tape & Reel (TR)
KTR18EZPF4993	Rohm Semiconductor	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Active	Tape & Reel (TR)
RC1206FR-07499KL	YAGEO	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Active	Cut Tape (CT) & Digi-Reel®
RMCF1206FG499K	Stackpole Electronics Inc	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Active	Cut Tape (CT)
RMCF1206FT499K	Stackpole Electronics Inc	499 kOhms	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Thick Film	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

RMCF1206FT499K (Stackpole Electronics Inc) and KTR18EZPF4993 (Rohm Semiconductor) are recommended as primary substitutes. Both maintain Active product status, ensuring long-term availability and continued manufacturing support. RMCF1206FT499K offers the highest inventory availability (232,536 pieces) and Tape & Reel packaging matching the original part format. KTR18EZPF4993 provides AEC-Q200 automotive qualification and high voltage features with substantial inventory (75,408 pieces).

Secondary Substitutes (Active Product Status):

RC1206FR-07499KL (YAGEO) and RMCF1206FG499K (Stackpole Electronics Inc) are Active status alternatives. RC1206FR-07499KL offers exceptional inventory depth (1,484,497 pieces) and moisture-resistant thick film composition. RMCF1206FG499K provides AEC-Q200 automotive qualification in Cut Tape format.

Legacy Substitute (Not For New Designs):

ERJ-8ENF4993V (Panasonic Electronic Components) carries "Not For New Designs" status despite substantial inventory (44,831 pieces). This designation indicates the manufacturer is phasing out this product line. Use only for replacement or repair of existing assemblies where design continuity is required.

Compliance Considerations:

All substitute parts are ROHS3 Compliant (where specified), REACH Unaffected, and classified as EAR99 for export control purposes. All maintain MSL 1 (Unlimited) moisture sensitivity rating, requiring no special storage or handling protocols.

Frequently Asked Questions (FAQ)

Q: Can ERJ-8ENF4993V be used in new product designs?

A: No. ERJ-8ENF4993V carries "Not For New Designs" product status. This part is suitable only for replacement, repair, or continuation of existing production runs. For new designs, select from Active status alternatives: RMCF1206FT499K, KTR18EZPF4993, RC1206FR-07499KL, or RMCF1206FG499K.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, suitable for automated pick-and-place assembly. Cut Tape supplies components on cut segments of carrier tape, typically for manual assembly or lower-volume applications. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Are dimensional variations between substitute parts significant?

A: Dimensional variations fall within standard supplier tolerances and do not affect PCB assembly compatibility. Length ranges from 0.122" to 0.126" and height from 0.025" to 0.028". Standard PCB footprints accommodate these variations. Verify specific PCB design constraints if space is critically limited.

Q: Which substitute offers the best long-term availability?

A: RC1206FR-07499KL (YAGEO) demonstrates the strongest availability position with 1,484,497 pieces in stock and Active product status. RMCF1206FT499K (Stackpole Electronics Inc) with 232,536 pieces also provides robust supply continuity.

Q: Do substitute parts require different soldering or assembly processes?

A: No. All substitute parts use identical 1206 package format, thick film composition, and two-terminal configuration. Standard SMD assembly processes, reflow profiles, and soldering parameters apply uniformly across all listed parts.

Q: What certifications apply to automotive applications?

A: KTR18EZPF4993, RMCF1206FG499K, and RMCF1206FT499K carry AEC-Q200 automotive qualification. ERJ-8ENF4993V also includes AEC-Q200 rating. Use these parts for automotive or high-reliability applications requiring formal qualification documentation.

Q: Is RoHS compliance required for all substitutes?

A: ROHS3 compliance is confirmed for all substitute parts where specified in manufacturer data. The original RMC1/8K4993FTP does not list explicit RoHS status in provided specifications. All parts are REACH Unaffected and EAR99 classified.

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