RC3225F4992CS 49.9kΩ 1% 1/3W 1210 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC3225F4992CS is a 49.9 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package format. This component is rated for 0.333W (1/3W) power dissipation and operates across the temperature range of -55°C to 155°C. The part is classified as Active product status and carries ROHS3 compliance with Moisture Sensitivity Level 1 (unlimited shelf life).

Equivalent and substitute parts are necessary when the original RC3225F4992CS becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design requirements permit higher power ratings or enhanced automotive qualification levels.

Substiute Parts

RC3225F4992CS

Samsung Electro-MechanicsIn Stock: 711RC3225F4992CS Datasheet

Current PartRFQ

RC1210FR-0749K9L

YAGEOIn Stock: 10577RC1210FR-0749K9L Datasheet

UpgradeRFQ

CRCW121049K9FKEA

Vishay DaleIn Stock: 26945CRCW121049K9FKEA Datasheet

SimilarRFQ

ERJ-14NF4992U

Panasonic Electronic ComponentsIn Stock: 18194ERJ-14NF4992U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC3225F4992CS is permissible when the following core parameters remain constant or are enhanced:

Critical Parameters (Must Match or Exceed):

• Resistance value: 49.9 kOhms
• Tolerance: ±1%
• Package format: 1210 (3225 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C ~ 155°C minimum
• Moisture resistance: Required
• RoHS3 compliance: Required

Allowable Variations:

• Power rating: May be equal or higher (0.333W minimum)
• Manufacturer: Different manufacturers permitted
• Packaging format: Tape & Reel acceptable for original bulk packaging
• Physical dimensions: Minor variations within package class tolerance
• MSL rating: Equal or superior (1 is maximum)

The substitute parts identified below meet or exceed these criteria and are electrically and mechanically compatible with the RC3225F4992CS in standard circuit applications.

Parameter Comparison

Engineering Selection Recommendations

RC1210FR-0749K9L (YAGEO) - Upgrade Substitute

This part is the primary equivalent for direct substitution. It maintains all critical electrical parameters identical to the RC3225F4992CS while offering a higher power rating of 0.5W. The YAGEO RC1210FR-0749K9L carries Active product status, ensuring continued availability and support. This part is suitable for new designs and provides enhanced thermal margin in power-dissipation-sensitive applications.

CRCW121049K9FKEA (Vishay Dale) - Similar Substitute with Automotive Qualification

This part meets all electrical and mechanical requirements and adds AEC-Q200 automotive qualification. The CRCW121049K9FKEA is appropriate for applications requiring automotive-grade components or when automotive supply chain traceability is mandated. Active product status confirms ongoing manufacturability.

ERJ-14NF4992U (Panasonic) - Similar Substitute with Automotive Qualification

This part satisfies all core electrical and mechanical parameters and includes AEC-Q200 automotive qualification. However, the ERJ-14NF4992U carries a "Not For New Designs" product status designation. This part is suitable only for replacement or maintenance of existing designs and is not recommended for new product development.

Frequently Asked Questions (FAQ)

Q: Can RC1210FR-0749K9L replace RC3225F4992CS directly in my circuit?

A: Yes. The RC1210FR-0749K9L is electrically and mechanically compatible. Both parts share identical resistance (49.9 kOhms), tolerance (±1%), package format (1210), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C ~ 155°C). The higher power rating (0.5W vs. 0.333W) of the YAGEO part provides additional thermal capability and does not create compatibility issues.

Q: What is the difference between the Samsung RC3225F4992CS and the Vishay CRCW121049K9FKEA?

A: The primary differences are manufacturer and automotive qualification. Both parts have identical electrical specifications (49.9 kOhms ±1%, ±100ppm/°C, -55°C ~ 155°C). The CRCW121049K9FKEA includes AEC-Q200 automotive qualification, while the RC3225F4992CS does not. The CRCW121049K9FKEA has a slightly higher power rating (0.5W vs. 0.333W). Physical dimensions vary slightly within the 1210 package tolerance.

Q: Why is the Panasonic ERJ-14NF4992U marked "Not For New Designs"?

A: The "Not For New Designs" status indicates that Panasonic has discontinued active development and promotion of this part. While the ERJ-14NF4992U remains electrically and mechanically compatible and is available in inventory, it is intended for maintenance and replacement of existing products only. New product designs should use the YAGEO RC1210FR-0749K9L or Vishay CRCW121049K9FKEA.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (RC1210FR-0749K9L, CRCW121049K9FKEA, and ERJ-14NF4992U) carry ROHS3 compliance certification, matching the original RC3225F4992CS.

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

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture-control storage requirements. All parts in this comparison, including the RC3225F4992CS and all substitutes, carry this rating, eliminating moisture-related handling constraints.

Q: Can I use a substitute part with higher power rating in a space-constrained design?

A: Physical dimensions must be verified. While all substitute parts use the 1210 (3225 Metric) package, minor dimensional variations exist. The RC1210FR-0749K9L measures 3.10mm × 2.60mm, while the original RC3225F4992CS measures 3.20mm × 2.55mm. Verify PCB footprint compatibility before substitution in space-critical applications.

Q: Which substitute part should I select for automotive applications?

A: For automotive applications requiring AEC-Q200 qualification, select either the CRCW121049K9FKEA (Vishay Dale, Active status) or ERJ-14NF4992U (Panasonic, Not For New Designs status). The CRCW121049K9FKEA is recommended for new automotive designs due to its Active product status.