CFM12JT2R40 Equivalent & Substitute Parts

Part Overview

The CFM12JT2R40 is a 2.4 Ohms ±5% 0.5W through-hole resistor manufactured by Stackpole Electronics Inc. This axial carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring reliable resistance values in compact form factors. The part is currently active in production with full RoHS3 compliance. Substitute parts are identified to address packaging format availability and inventory requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

CFM12JT2R40

Stackpole Electronics IncIn Stock: 833CFM12JT2R40 Datasheet

Current PartRFQ

CF12JT2R40

Stackpole Electronics IncIn Stock: 7369CF12JT2R40 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between CFM12JT2R40 and CF12JT2R40 is valid based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 2.4 Ohms
• Tolerance: ±5%
• Power rating: 0.5W (1/2W)
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Must Match):

• Package type: Axial through-hole
• Composition: Carbon film
• Features: Flame retardant coating, safety characteristics

Allowed Variation:

• Packaging format: Tape & Reel (TR) versus Cut Tape (CT) — both are standard distribution methods for the same component
• Physical dimensions: Minor variations in diameter and length are acceptable within axial resistor specifications (CFM12JT2R40: 2.30mm × 6.50mm; CF12JT2R40: 2.70mm × 8.50mm)

Both parts maintain identical electrical performance and regulatory compliance, with differences limited to packaging and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

Both CFM12JT2R40 and CF12JT2R40 are suitable for direct substitution in applications requiring 2.4 Ohms ±5% 0.5W axial carbon film resistors. Selection between these parts should be based on:

Packaging Requirements: Choose CFM12JT2R40 (Tape & Reel) for automated assembly processes requiring continuous reel feeding. Select CF12JT2R40 (Cut Tape) for manual assembly, prototyping, or applications with lower volume requirements.

Physical Space Constraints: The CFM12JT2R40 offers a more compact form factor (2.30mm diameter × 6.50mm length) compared to CF12JT2R40 (2.70mm diameter × 8.50mm length). Verify PCB layout clearances if space is limited.

Regulatory Compliance: Both parts maintain identical RoHS3 and REACH compliance status, suitable for applications subject to these regulations.

Inventory Availability: CF12JT2R40 currently maintains higher stock levels (7342 pcs) compared to CFM12JT2R40 (759 pcs), which may influence procurement decisions for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can CF12JT2R40 replace CFM12JT2R40 in my circuit?

A: Yes. Both parts have identical electrical specifications (2.4 Ohms ±5%, 0.5W, ±400ppm/°C, -55°C to 155°C operating range). The difference is packaging format (Cut Tape versus Tape & Reel) and physical dimensions. Verify that the larger dimensions of CF12JT2R40 (2.70mm × 8.50mm) do not conflict with your PCB layout.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous reels for automated pick-and-place assembly. Cut Tape (CT) packaging provides components pre-cut from tape for manual handling or lower-volume applications. Both contain identical components with the same electrical performance.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts have identical temperature coefficients (±400ppm/°C) and operating temperature ranges (-55°C to 155°C). Thermal performance and electrical stability are equivalent.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CFM12JT2R40 and CF12JT2R40 are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements.

Q: Which part should I choose for my design?

A: Selection depends on assembly method and available space. Use CFM12JT2R40 for automated assembly with reel feeding. Use CF12JT2R40 for manual assembly or prototyping. Confirm that the 2.70mm diameter and 8.50mm length of CF12JT2R40 fit your PCB layout if switching from the more compact CFM12JT2R40.