CFM12JA820R Equivalent & Substitute Parts

Part Overview

The CFM12JA820R is a 820 Ohms ±5% 0.5W through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring reliable resistance in compact form factors. The part is currently in active production status with robust inventory availability. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

CFM12JA820R

Stackpole Electronics IncIn Stock: 1080CFM12JA820R Datasheet

Current PartRFQ

CF12JA820R

Stackpole Electronics IncIn Stock: 1053CF12JA820R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CFM12JA820R is determined by strict equivalence across the following critical parameters:

• Resistance value: 820 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Composition: Carbon Film (exact match required)
• Package: Axial through-hole (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• Temperature coefficient: 0 / -400ppm/°C (exact match required)
• Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The CF12JA820R qualifies as a manufacturer-recommended substitute, maintaining all electrical and mechanical specifications while differing only in physical dimensions (0.106" Dia x 0.335" L versus 0.091" Dia x 0.256" L). Both parts are manufactured by Stackpole Electronics Inc and share identical functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both CFM12JA820R and CF12JA820R are active production components from Stackpole Electronics Inc with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on physical space constraints within the application circuit board layout. The CFM12JA820R offers a more compact form factor (2.30mm diameter, 6.50mm length), while the CF12JA820R provides a slightly larger envelope (2.70mm diameter, 8.50mm length). Both parts maintain identical electrical performance and regulatory compliance. Inventory availability is comparable for both options.

Frequently Asked Questions (FAQ)

Q: Can CF12JA820R be used as a direct replacement for CFM12JA820R?

A: Yes. Both parts meet identical electrical specifications: 820 Ohms ±5% at 0.5W power rating with carbon film composition. The primary difference is physical dimension. CF12JA820R is slightly larger in both diameter and length. Substitution is valid provided circuit board layout accommodates the larger package size.

Q: What are the critical parameters that must match for substitution?

A: Resistance value (820 Ohms), tolerance (±5%), power rating (0.5W), composition (carbon film), package type (axial), temperature coefficient (0 / -400ppm/°C), operating temperature range (-55°C ~ 155°C), and compliance certifications (ROHS3, REACH) must all remain identical.

Q: Are there dimensional constraints I should consider?

A: Yes. CFM12JA820R measures 0.091" diameter by 0.256" length. CF12JA820R measures 0.106" diameter by 0.335" length. If your circuit board design has tight spacing or height restrictions, verify that the substitute part's larger dimensions do not create mechanical interference.

Q: Do both parts have the same regulatory compliance?

A: Yes. Both CFM12JA820R and CF12JA820R are ROHS3 compliant and REACH unaffected, meeting identical environmental and safety standards.

Q: What is the temperature coefficient specification and why does it matter?

A: Both parts specify 0 / -400ppm/°C temperature coefficient. This indicates the resistance value will change by up to 400 parts per million for every degree Celsius change in operating temperature. This specification is identical for both parts and affects long-term stability in temperature-sensitive applications.