RC12JB3K30 Equivalent & Substitute Parts

Part Overview

The RC12JB3K30 is a 3.3 kOhms ±5% 0.5W axial through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse withstanding characteristics, with an operating temperature range of -55°C to 125°C. The product is currently obsolete, making identification of suitable substitute components necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

RC12JB3K30

Stackpole Electronics IncIn Stock: 809RC12JB3K30 Datasheet

Current PartRFQ

ASRM1JA3K30

Stackpole Electronics IncIn Stock: 1549ASRM1JA3K30 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC12JB3K30 is determined by the following critical parameters:

• Resistance Value: Must be 3.3 kOhms
• Tolerance: Must be ±5% or tighter
• Package Type: Must be Axial through-hole configuration
• Power Rating: Must be equal to or greater than 0.5W
• Pulse Withstanding Capability: Required feature for functional equivalence
• Regulatory Compliance: Must maintain ROHS3 compliance

The ASRM1JA3K30 meets all substitution criteria while offering enhanced specifications in power rating and composition type.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA3K30 is a direct functional substitute for the RC12JB3K30. Both components share identical resistance values, tolerance specifications, and axial package configuration. The substitute part provides a higher power rating (1W versus 0.5W), an extended operating temperature range (-55°C to 155°C versus -55°C to 125°C), and active product status with current manufacturing availability.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for applications requiring these certifications. The metal film composition of the substitute offers improved stability characteristics compared to the carbon composition of the original part, while retaining pulse withstanding capability essential for circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA3K30 directly replace the RC12JB3K30 in existing designs?

A: Yes. Both components have identical resistance values (3.3 kOhms), matching tolerance (±5%), and axial through-hole package configuration. The substitute part meets or exceeds all electrical and mechanical parameters of the original component.

Q: What is the significance of the higher power rating on the substitute part?

A: The ASRM1JA3K30 is rated for 1W compared to the RC12JB3K30's 0.5W rating. This provides additional thermal margin and reliability in applications where the original 0.5W specification was marginal. The higher rating does not negatively impact circuit performance.

Q: Are there any compatibility concerns with the different compositions?

A: The RC12JB3K30 uses carbon composition while the ASRM1JA3K30 uses metal film. Both compositions are suitable for axial through-hole applications. Metal film resistors typically offer superior frequency response and lower noise characteristics, making the substitute a performance-equivalent or superior choice.

Q: Does the extended operating temperature range of the substitute affect compatibility?

A: No. The substitute's extended range (-55°C to 155°C versus -55°C to 125°C) provides additional operational margin without affecting compatibility. Applications designed for the original temperature range will function within the substitute's specifications.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the RC12JB3K30 and ASRM1JA3K30 are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and use.