RMC1/8-4994FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8-4994FTP is a 4.99 MOhms ±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 with unlimited moisture sensitivity rating (MSL 1). The part is supplied in Tape & Reel packaging with 936 pieces currently in stock. Substitute parts are necessary to address supply chain continuity, alternative sourcing requirements, or specific application needs such as automotive qualification or enhanced performance characteristics.

Substiute Parts

RMC1/8-4994FTP

Kamaya Inc.In Stock: 952RMC1/8-4994FTP Datasheet

Current PartRFQ

RMCF1206FT4M99

Stackpole Electronics IncIn Stock: 3560RMCF1206FT4M99 Datasheet

DirectRFQ

KTR18EZPF4994

Rohm SemiconductorIn Stock: 23349KTR18EZPF4994 Datasheet

UpgradeRFQ

RC1206FR-074M99L

YAGEOIn Stock: 47167RC1206FR-074M99L Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RMC1/8-4994FTP is determined by strict equivalence across the following mandatory parameters:

Core Electrical Parameters:

• Resistance value: 4.99 MOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)

Physical & Package Parameters:

• Package type: 1206 (3216 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)

Environmental & Compliance Parameters:

• Operating temperature range: -55°C ~ 155°C (minimum requirement)
• Moisture sensitivity level: MSL 1 (Unlimited) (minimum requirement)
• REACH Status: REACH Unaffected (compliance requirement)

All substitute parts listed meet these mandatory criteria. Additional features such as automotive AEC-Q200 qualification, high voltage capability, or moisture resistance represent enhanced characteristics that do not disqualify a part from substitution but indicate upgraded performance or application scope.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution (Electrical & Mechanical Equivalence):

All four parts listed are electrically and mechanically equivalent for applications requiring a 4.99 MOhms ±1% 0.25W 1206 thick film resistor. Selection among these parts should be based on:

1. Supply Chain Availability: YAGEO RC1206FR-074M99L offers the highest inventory (47064 Pcs), followed by Rohm KTR18EZPF4994 (23311 Pcs), Stackpole RMCF1206FT4M99 (3528 Pcs), and Kamaya RMC1/8-4994FTP (936 Pcs).

2. Compliance Requirements: RMCF1206FT4M99, KTR18EZPF4994, and RC1206FR-074M99L all carry ROHS3 compliance certification. The original Kamaya part does not specify RoHS status.

3. Automotive Applications: RMCF1206FT4M99 and KTR18EZPF4994 both carry AEC-Q200 automotive qualification. KTR18EZPF4994 additionally features high voltage capability and improved temperature coefficient (±100ppm/°C versus ±200ppm/°C).

4. Environmental Performance: RC1206FR-074M99L includes moisture resistant construction. KTR18EZPF4994 and RC1206FR-074M99L both feature superior temperature coefficient performance (±100ppm/°C).

Selection Priority:

• For general industrial applications with standard supply requirements: RC1206FR-074M99L (YAGEO)
• For automotive or high-reliability applications: KTR18EZPF4994 (Rohm)
• For automotive applications with standard performance: RMCF1206FT4M99 (Stackpole)
• For original equipment continuity: RMC1/8-4994FTP (Kamaya)

Frequently Asked Questions (FAQ)

Q: Can RMCF1206FT4M99 replace RMC1/8-4994FTP in any application?

A: Yes. Both parts share identical electrical specifications (4.99 MOhms ±1%, 0.25W), composition (thick film), package (1206), and operating temperature range (-55°C ~ 155°C). The RMCF1206FT4M99 includes automotive AEC-Q200 qualification, which does not restrict its use in non-automotive applications. Physical dimensions are within acceptable tolerance for PCB footprint compatibility.

Q: What is the difference between KTR18EZPF4994 and RC1206FR-074M99L?

A: Both parts are electrically equivalent with identical resistance, tolerance, and power rating. Key differences are: KTR18EZPF4994 includes automotive AEC-Q200 qualification and high voltage capability with ±100ppm/°C temperature coefficient; RC1206FR-074M99L features moisture resistant construction with ±100ppm/°C temperature coefficient. Selection depends on application requirements for automotive qualification or moisture resistance.

Q: Are there physical footprint differences between these parts?

A: All parts use 1206 (3216 Metric) package. Minor dimensional variations exist: RMC1/8-4994FTP and RC1206FR-074M99L measure 0.122" L × 0.063" W (3.10mm × 1.60mm); RMCF1206FT4M99 and KTR18EZPF4994 measure 0.126" L × 0.063" W (3.20mm × 1.60mm). These variations are within standard 1206 package tolerance and do not affect PCB compatibility.

Q: Which substitute part has the best temperature stability?

A: KTR18EZPF4994 and RC1206FR-074M99L both feature ±100ppm/°C temperature coefficient, compared to ±200ppm/°C for RMC1/8-4994FTP and RMCF1206FT4M99. For applications requiring superior temperature stability, either KTR18EZPF4994 or RC1206FR-074M99L is recommended.

Q: Is RoHS compliance required for substitution?

A: RoHS compliance is not a substitution requirement but a regulatory consideration. RMCF1206FT4M99, KTR18EZPF4994, and RC1206FR-074M99L all carry ROHS3 certification. If RoHS compliance is mandatory for your application, these three parts are suitable; the original RMC1/8-4994FTP does not specify RoHS status.

Q: Can I use KTR18EZPF4994 in non-automotive applications?

A: Yes. Automotive AEC-Q200 qualification indicates enhanced reliability and testing standards but does not restrict use to automotive applications. KTR18EZPF4994 is suitable for any application requiring a 4.99 MOhms ±1% 0.25W 1206 thick film resistor.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All four parts carry this rating, eliminating moisture sensitivity as a differentiation factor.