CF1/4C300J Equivalent & Substitute Parts

Part Overview

The CF1/4C300J is a 30 Ohms ±5% 0.25W through-hole resistor manufactured by KOA Speer Electronics, Inc. This axial carbon film resistor is designed for general-purpose applications requiring flame-proof and safety-rated components. The part is currently in active production status with 1983 pieces available in bulk packaging. Substitute parts are identified when equivalent electrical and mechanical specifications are required but alternative packaging or sourcing options are necessary.

Substiute Parts

CF1/4C300J

KOA Speer Electronics, Inc.In Stock: 2021CF1/4C300J Datasheet

Current PartRFQ

CF1/4CT52R300J

KOA Speer Electronics, Inc.In Stock: 6200CF1/4CT52R300J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CF1/4C300J is permissible when the following parameters remain constant:

• Resistance value: 30 Ohms
• Tolerance: ±5%
• Power rating: 0.25W (1/4W)
• Composition: Carbon Film
• Package type: Axial
• Temperature coefficient: -450/+350 ppm/°C
• Operating temperature range: -55°C to +155°C
• Physical dimensions: 0.091" Dia × 0.240" L (2.30mm × 6.10mm)
• Number of terminations: 2
• Compliance: ROHS3 Compliant, REACH Unaffected

The primary variable between the main part and its substitute is packaging format: bulk versus cut tape. Both parts share identical electrical and mechanical specifications, making them functionally interchangeable in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both CF1/4C300J and CF1/4CT52R300J are active production components from KOA Speer Electronics, Inc., with identical electrical and mechanical specifications. Selection between these parts is determined by packaging requirements and supply chain logistics rather than technical performance.

The CF1/4C300J in bulk packaging is suitable for high-volume manufacturing environments where components are supplied in loose form. The CF1/4CT52R300J in cut tape packaging is appropriate for automated assembly processes and applications requiring component tape-and-reel handling.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The identical temperature coefficient and operating temperature range ensure consistent performance across the specified environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can CF1/4CT52R300J replace CF1/4C300J in circuit applications?

A: Yes. Both parts have identical resistance (30 Ohms), tolerance (±5%), power rating (0.25W), composition (carbon film), package type (axial), and physical dimensions. They are functionally equivalent for all circuit applications.

Q: What is the difference between bulk and cut tape packaging?

A: Bulk packaging supplies components loose in a container, suitable for manual assembly or high-volume pick-and-place operations. Cut tape packaging supplies components on adhesive tape in a reel format, optimized for automated assembly equipment.

Q: Are the temperature coefficients identical?

A: Yes. Both parts have a temperature coefficient of -450/+350 ppm/°C and an operating temperature range of -55°C to +155°C.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CF1/4C300J and CF1/4CT52R300J are ROHS3 compliant and REACH unaffected.

Q: What determines substitution eligibility?

A: Substitution is valid when resistance value, tolerance, power rating, composition, package type, temperature coefficient, operating temperature range, physical dimensions, and compliance status remain unchanged. Packaging format (bulk versus cut tape) is the only variable parameter.