RC12KT100R Equivalent & Substitute Parts

Part Overview

The RC12KT100R is a 100 Ohm ±10% 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 classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

RC12KT100R

Stackpole Electronics IncIn Stock: 1007RC12KT100R Datasheet

Current PartRFQ

ASRM1JA100R

Stackpole Electronics IncIn Stock: 1118ASRM1JA100R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASRM1JA100R qualifies as a manufacturer-recommended substitute for the RC12KT100R based on the following substitution criteria:

Matching Parameters:

• Identical resistance value: 100 Ohms
• Compatible package format: Axial through-hole configuration
• Equivalent mechanical footprint compatibility for PCB mounting
• Shared RoHS3 compliance and REACH unaffected status
• Both components feature pulse withstanding capability

Allowable Variations:

• Tolerance upgrade from ±10% to ±5% (tighter tolerance acceptable)
• Power rating increase from 0.5W to 1W (higher rating acceptable)
• Composition change from carbon composition to metal film (performance enhancement)
• Extended operating temperature range from -55°C ~ 125°C to -55°C ~ 155°C (broader range acceptable)

Parameter Comparison

Engineering Selection Recommendations

The ASRM1JA100R is the manufacturer-recommended substitute for the obsolete RC12KT100R. Selection of this substitute is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• Identical resistance specification and axial package format enabling direct PCB mounting compatibility
• Enhanced tolerance specification (±5% versus ±10%) providing improved circuit accuracy
• Increased power rating (1W versus 0.5W) offering additional thermal margin
• Extended operating temperature range (-55°C ~ 155°C versus -55°C ~ 125°C) supporting broader application environments
• Maintained RoHS3 compliance and REACH unaffected status for regulatory alignment
• Metal film composition with flame retardant coating providing enhanced reliability characteristics

Frequently Asked Questions (FAQ)

Q: Can the ASRM1JA100R directly replace the RC12KT100R in existing designs?

A: Yes. Both components share identical 100 Ohm resistance values and axial package configurations. The substitute features improved tolerance, higher power rating, and extended temperature range, making it functionally compatible for direct substitution in PCB assemblies.

Q: What is the significance of the tolerance change from ±10% to ±5%?

A: The tighter tolerance of the ASRM1JA100R (±5%) provides greater resistance accuracy compared to the RC12KT100R (±10%). This enhancement improves circuit performance in applications requiring precise resistance values without design modification.

Q: Why is the power rating increased from 0.5W to 1W?

A: The higher power rating of the ASRM1JA100R provides additional thermal dissipation capability. This allows the component to operate safely in applications with higher current demands or elevated ambient temperatures while maintaining reliability margins.

Q: Are there physical dimension differences between these components?

A: The ASRM1JA100R has slightly larger dimensions (0.157" Dia x 0.433" L) compared to the RC12KT100R (0.142" Dia x 0.374" L). Both maintain axial package format and standard through-hole PCB mounting compatibility. Verify PCB layout clearances for space-constrained applications.

Q: Do both components meet the same regulatory requirements?

A: Yes. Both the RC12KT100R and ASRM1JA100R are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards for electronic component applications.

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

A: The RC12KT100R uses carbon composition construction, while the ASRM1JA100R uses metal film construction. Metal film resistors typically offer better tolerance accuracy, lower noise, and improved temperature stability. Both types are suitable for general-purpose applications.