RC1KB68K0 Equivalent & Substitute Parts

Part Overview

The RC1KB68K0 is a 68 kOhms ±10% 1W through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition axial resistor features non-inductive and pulse withstanding characteristics, with an operating temperature range of -55°C to 125°C. The product is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

RC1KB68K0

Stackpole Electronics IncIn Stock: 747RC1KB68K0 Datasheet

Current PartRFQ

ASRM1JA68K0

Stackpole Electronics IncIn Stock: 1140ASRM1JA68K0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1KB68K0 is based on the following critical parameters:

• Resistance value: 68 kOhms (exact match required)
• Power rating: 1W (exact match required)
• Package type: Axial (exact match required)
• Operating temperature range: Minimum -55°C to 125°C coverage
• RoHS compliance: ROHS3 Compliant

The ASRM1JA68K0 qualifies as a direct substitute based on matching resistance, power rating, and axial package configuration. While the substitute employs metal film composition instead of carbon composition, both technologies meet the specified electrical and mechanical requirements for this application category.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA68K0 is an active product with current manufacturing support, providing supply chain continuity for the obsolete RC1KB68K0. Both components maintain ROHS3 compliance and REACH unaffected status. The substitute offers improved tolerance (±5% versus ±10%) and an extended operating temperature range to 155°C. Physical dimensions differ, with the substitute being smaller in both diameter and length. Both components are manufactured by Stackpole Electronics Inc, ensuring consistent quality standards and design heritage.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA68K0 directly replace the RC1KB68K0 in existing designs?

A: The ASRM1JA68K0 matches the critical electrical parameters: 68 kOhms resistance, 1W power rating, and axial package configuration. Physical dimensions differ, which may affect board layout compatibility. Verify mounting clearances and PCB hole spacing before implementation.

Q: What is the difference between carbon composition and metal film resistors?

A: Both technologies deliver the specified resistance and power rating. Carbon composition resistors exhibit higher noise and temperature coefficient characteristics. Metal film resistors provide tighter tolerance and lower noise performance. Selection depends on application-specific noise and stability requirements.

Q: Does the improved tolerance of the ASRM1JA68K0 affect circuit performance?

A: The substitute's ±5% tolerance is tighter than the original ±10% specification. This provides improved precision but does not negatively impact circuits designed for the original tolerance. Circuits requiring the original ±10% tolerance will operate within specification with the substitute.

Q: Are there physical installation considerations when switching to the ASRM1JA68K0?

A: The substitute is smaller in diameter (0.157" versus 0.224") and length (0.433" versus 0.563"). Verify that PCB hole spacing, component clearances, and thermal management provisions accommodate the smaller dimensions.

Q: What compliance certifications apply to both components?

A: Both the RC1KB68K0 and ASRM1JA68K0 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.