RMC1/8K4990FTP Equivalent & Substitute Parts

Part Overview

The RMC1/8K4990FTP is a 499 Ohm ±1% 0.25W thick film chip resistor manufactured by Kamaya Inc. in 1206 (3216 Metric) surface mount package format. This component is classified as Active product status and is currently in stock with 902 pieces available. The RMC series resistor is designed for general-purpose applications requiring precision resistance values with standard temperature stability. Substitute parts are identified when the original manufacturer part becomes unavailable, when design requirements necessitate alternative certifications (such as automotive AEC-Q200 compliance), or when supply chain optimization requires sourcing from alternative manufacturers while maintaining identical electrical and mechanical specifications.

Substiute Parts

RMC1/8K4990FTP

Kamaya Inc.In Stock: 951RMC1/8K4990FTP Datasheet

Current PartRFQ

CRG1206F499R

TE Connectivity Passive ProductIn Stock: 652CRG1206F499R Datasheet

DirectRFQ

ERJ-8ENF4990V

Panasonic Electronic ComponentsIn Stock: 140919ERJ-8ENF4990V Datasheet

DirectRFQ

KTR18EZPF4990

Rohm SemiconductorIn Stock: 877KTR18EZPF4990 Datasheet

DirectRFQ

RC1206FR-07499RL

YAGEOIn Stock: 94808RC1206FR-07499RL Datasheet

DirectRFQ

RMCF1206FT499R

Stackpole Electronics IncIn Stock: 84912RMCF1206FT499R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RMC1/8K4990FTP are qualified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is structured as follows:

Primary Substitution Criteria (Non-Negotiable):

• Resistance value: 499 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Package: 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: MSL 1 (Unlimited) (exact match required)

Secondary Considerations (Allowed Variations):

• Manufacturer identity (different manufacturers acceptable)
• Product status (Active or Not For New Designs both acceptable)
• Specific dimensional tolerances within package class (minor variations acceptable within 1206 specification)
• Additional certifications or features (automotive AEC-Q200, high voltage capability) are additive and do not disqualify substitution
• RoHS compliance status variations (ROHS3 Compliant or Vendor Undefined both acceptable)

All five identified substitute parts meet the primary substitution criteria and are therefore direct functional equivalents to the RMC1/8K4990FTP.

Parameter Comparison

Engineering Selection Recommendations

For General-Purpose Applications (Non-Automotive): The RC1206FR-07499RL (YAGEO) and CRG1206F499R (TE Connectivity) are suitable direct substitutes. Both maintain Active product status and offer high inventory availability. The YAGEO part includes moisture-resistant features and provides the largest available stock (94,723 pieces), supporting supply chain continuity.

For Automotive Applications Requiring AEC-Q200 Certification: Three substitute parts carry automotive AEC-Q200 qualification: RMCF1206FT499R (Stackpole Electronics), ERJ-8ENF4990V (Panasonic), and KTR18EZPF4990 (Rohm Semiconductor). The Stackpole RMCF1206FT499R and Rohm KTR18EZPF4990 maintain Active product status. The Panasonic ERJ-8ENF4990V carries "Not For New Designs" status, limiting its use to legacy system support or replacement applications only.

For High-Voltage Applications: The KTR18EZPF4990 (Rohm Semiconductor) is specified with high-voltage capability in addition to AEC-Q200 automotive certification, providing enhanced performance margin for demanding electrical environments while maintaining all core electrical specifications.

For Supply Chain Optimization: The ERJ-8ENF4990V (Panasonic) offers exceptional inventory depth (140,809 pieces), supporting high-volume production requirements despite its "Not For New Designs" status. This part remains suitable for ongoing production of existing designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute the RMC1/8K4990FTP with any of the listed parts without circuit redesign?

A: Yes. All listed substitute parts are electrically and mechanically equivalent. They share identical resistance value (499 Ohms), tolerance (±1%), power rating (0.25W), package format (1206), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). No circuit redesign is required for direct substitution.

Q: What is the difference between the standard RMC1/8K4990FTP and the automotive-qualified alternatives?

A: The RMC1/8K4990FTP carries no automotive certification. The RMCF1206FT499R, ERJ-8ENF4990V, and KTR18EZPF4990 are qualified to AEC-Q200 automotive standards, indicating enhanced reliability testing and qualification for automotive applications. The KTR18EZPF4990 additionally includes high-voltage capability. For non-automotive applications, automotive-certified parts function identically to the standard part.

Q: Why is the Panasonic ERJ-8ENF4990V marked "Not For New Designs"?

A: "Not For New Designs" indicates the manufacturer has discontinued active development of this product line. Existing inventory remains available and the part continues to function to specification. This status restricts use to replacement or legacy system support. For new designs, select from parts with Active status: RMCF1206FT499R, RC1206FR-07499RL, CRG1206F499R, or KTR18EZPF4990.

Q: Are there dimensional differences between substitute parts that affect PCB layout?

A: All parts conform to the 1206 (3216 Metric) package specification. Minor dimensional variations exist within specification tolerances. The RMC1/8K4990FTP, RC1206FR-07499RL, and CRG1206F499R measure 0.122" length; RMCF1206FT499R, ERJ-8ENF4990V, and KTR18EZPF4990 measure 0.126" length. These variations fall within standard 1206 package tolerances and do not require PCB footprint modification. Height variations (0.025" to 0.028" seated maximum) are similarly within package specification and do not affect assembly or clearance.

Q: Which substitute part offers the best supply chain availability?

A: The ERJ-8ENF4990V (Panasonic) provides the largest inventory at 140,809 pieces. The RC1206FR-07499RL (YAGEO) offers 94,723 pieces. Both support high-volume production. For Active product status with strong availability, the RC1206FR-07499RL is preferred.

Q: Can I use the KTR18EZPF4990 in place of the RMC1/8K4990FTP in a standard application?

A: Yes. The KTR18EZPF4990 is a direct functional equivalent with additional high-voltage and automotive AEC-Q200 certifications. These additional qualifications do not degrade performance in standard applications; they extend the part's qualified operating envelope. The part is suitable for any application where the RMC1/8K4990FTP is specified.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean for handling?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. The part does not require special dry-pack storage, desiccant handling, or bake-out procedures before soldering. All listed substitute parts carry identical MSL 1 rating, eliminating any handling procedure differences.

Q: Are all substitute parts RoHS compliant?

A: Five of the six substitute parts carry explicit ROHS3 Compliant status. The CRG1206F499R (TE Connectivity) shows "Vendor Undefined" RoHS status. For applications requiring confirmed RoHS3 compliance, select from RMCF1206FT499R, RC1206FR-07499RL, ERJ-8ENF4990V, or KTR18EZPF4990.