RC1KB1K50 Equivalent & Substitute Parts

Part Overview

The RC1KB1K50 is a 1.5 kOhms ±10% 1W through-hole axial 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 essential for ongoing maintenance, repair, and legacy system support. 754 units are available in new original stock.

Substiute Parts

RC1KB1K50

Stackpole Electronics IncIn Stock: 793RC1KB1K50 Datasheet

Current PartRFQ

ASRM1JA1K50

Stackpole Electronics IncIn Stock: 1146ASRM1JA1K50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1KB1K50 is determined by the following critical parameters:

• Resistance Value: 1.5 kOhms (exact match required)
• Power Rating: 1W (minimum requirement)
• Package Type: Axial (mechanical and electrical compatibility)
• Operating Temperature Range: Must encompass or exceed -55°C ~ 125°C
• Compliance Standards: RoHS3 compliance maintained

The ASRM1JA1K50 qualifies as a direct substitute based on matching resistance value, power rating, and axial package configuration. While the substitute features improved tolerance (±5% versus ±10%) and extended operating temperature range (-55°C ~ 155°C), these represent enhancements rather than deviations from the original specification. The transition from carbon composition to metal film construction maintains functional equivalence for pulse-withstanding applications.

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA1K50 is the designated substitute for the obsolete RC1KB1K50. Both components maintain ROHS3 compliance and are manufactured by the same supplier, ensuring regulatory consistency. The substitute's active product status provides long-term availability and supply chain stability compared to the obsolete original part.

The ASRM1JA1K50 demonstrates superior performance characteristics: tighter tolerance (±5% versus ±10%), extended operating temperature capability (-55°C ~ 155°C versus -55°C ~ 125°C), and enhanced safety features including flame retardant coating. These improvements do not introduce incompatibility with the original application requirements.

Selection of the substitute component is appropriate for new designs, system upgrades, and replacement applications where the original part is no longer procurable.

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA1K50 directly replace the RC1KB1K50 in existing circuits?

A: Yes. Both components share identical resistance value (1.5 kOhms), power rating (1W), and axial package configuration. The substitute's improved tolerance and extended temperature range do not create functional incompatibility.

Q: What is the primary difference between these two resistors?

A: The RC1KB1K50 uses carbon composition construction, while the ASRM1JA1K50 employs metal film construction. Both maintain pulse-withstanding capability. The metal film variant offers tighter tolerance and broader operating temperature range.

Q: Are there any mechanical compatibility concerns?

A: Both resistors use axial packaging. The ASRM1JA1K50 has slightly smaller physical dimensions (0.157" Dia x 0.433" L versus 0.224" Dia x 0.563" L), which presents no mounting or spacing issues in standard through-hole applications.

Q: Does the substitute meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory and environmental standards are maintained.

Q: Why is the original part obsolete?

A: The RC1KB1K50 has been discontinued by the manufacturer. The ASRM1JA1K50 represents the current-generation equivalent from the same manufacturer, offering improved specifications and ongoing availability.