CBT25J2R2 Equivalent & Substitute Parts

Part Overview

The CBT25J2R2 is a 2.2 Ohm, ±5% tolerance, 1/4W (0.25W) through-hole resistor manufactured by TE Connectivity Passive Product. This axial carbon composition resistor features pulse withstanding capability and operates across a temperature range of -55°C to 125°C. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement requirements.

Substiute Parts

CBT25J2R2

TE Connectivity Passive ProductIn Stock: 716CBT25J2R2 Datasheet

Current PartRFQ

CBT25K2R2

TE Connectivity Passive ProductIn Stock: 1010CBT25K2R2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CBT25J2R2 is determined by the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Resistance value: 2.2 Ohms
• Power rating: 0.25W (1/4W)
• Package type: Axial through-hole
• Physical dimensions: 0.094" Dia x 0.248" L
• Composition: Carbon Composition
• Operating temperature range: -55°C to 125°C
• Features: Pulse Withstanding capability
• Number of terminations: 2

Variable Parameters (Allowable Variation):

• Tolerance: The CBT25J2R2 specifies ±5% tolerance. Substitute parts with relaxed tolerance (±10%) are acceptable for applications where the tighter tolerance is not a circuit requirement.
• Product status: Active substitutes are preferred over obsolete parts for long-term availability.

Parameter Comparison

Engineering Selection Recommendations

CBT25K2R2 as Primary Substitute:

The CBT25K2R2 is the manufacturer-recommended substitute for the obsolete CBT25J2R2. This part maintains identical electrical performance across all critical parameters: 2.2 Ohm resistance, 0.25W power rating, carbon composition construction, axial package configuration, and -55°C to 125°C operating temperature range. The CBT25K2R2 is currently in active production status, ensuring long-term availability and supply chain continuity.

The tolerance specification differs between the two parts: the original CBT25J2R2 specifies ±5% tolerance, while the CBT25K2R2 specifies ±10% tolerance. This relaxation in tolerance is acceptable for circuit applications where the ±5% specification is not a critical design requirement. For applications requiring the tighter ±5% tolerance, circuit design review is necessary to determine if the ±10% tolerance introduces unacceptable performance variation.

Both parts are ROHS3 compliant or equivalent, meeting environmental and regulatory requirements. The identical physical dimensions and axial lead configuration ensure direct mechanical and electrical compatibility on printed circuit boards without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CBT25K2R2 be used as a direct replacement for the CBT25J2R2?

A: Yes, the CBT25K2R2 is a direct substitute for the CBT25J2R2 in applications where ±10% tolerance is acceptable. Both parts share identical resistance value, power rating, package type, physical dimensions, and operating temperature range. The primary difference is tolerance specification (±5% versus ±10%).

Q: What is the impact of the tolerance difference between ±5% and ±10%?

A: The CBT25J2R2 tolerance of ±5% produces a resistance range of 2.09 to 2.31 Ohms. The CBT25K2R2 tolerance of ±10% produces a resistance range of 1.98 to 2.42 Ohms. Applications sensitive to resistance variation must evaluate whether the wider tolerance band of the CBT25K2R2 affects circuit performance. For precision applications, circuit analysis is required.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the CBT25J2R2 and CBT25K2R2 share identical physical dimensions of 0.094" diameter by 0.248" length (2.40mm x 6.30mm). No PCB layout modifications are required for substitution.

Q: What is the product status difference, and why does it matter?

A: The CBT25J2R2 is classified as obsolete, indicating TE Connectivity Passive Product no longer manufactures this part. The CBT25K2R2 is in active production status, ensuring continued availability and supply chain support. For new designs and long-term procurement, the active CBT25K2R2 is the preferred choice.

Q: Are both parts RoHS compliant?

A: The CBT25J2R2 is confirmed ROHS3 compliant. The CBT25K2R2 RoHS status is not specified in the available documentation. Both parts are manufactured by TE Connectivity Passive Product and share identical composition and construction, indicating equivalent environmental compliance.

Q: Can these parts be used in pulse withstanding applications?

A: Yes. Both the CBT25J2R2 and CBT25K2R2 feature pulse withstanding capability, making them suitable for applications requiring transient overvoltage or overcurrent pulse tolerance.