RP2012T-R39-F Equivalent & Substitute Parts

Part Overview

The RP2012T-R39-F is a Metal Film chip resistor manufactured by Susumu with a resistance value of 390 mOhms, ±1% tolerance, and 0.333W (1/3W) power rating in an 0805 (2012 Metric) package. This component is currently classified as Obsolete, which necessitates identifying equivalent substitute parts for ongoing production, repair, or design requirements. The device operates across a temperature range of -55°C to 125°C and features a temperature coefficient of 0/+350ppm/°C.

Substiute Parts

RP2012T-R39-F

SusumuIn Stock: 800RP2012T-R39-F Datasheet

Current PartRFQ

RL1220S-R39-F

SusumuIn Stock: 55977RL1220S-R39-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part RL1220S-R39-F is electrically compatible with RP2012T-R39-F based on the following critical parameters: identical resistance value (390 mOhms), tolerance (±1%), power rating (0.333W, 1/3W), package size (0805/2012 Metric), physical dimensions (2.00mm x 1.25mm x 0.50mm), operating temperature range (-55°C ~ 125°C), and termination count (2). The substitute features Thin Film composition with Current Sense capability and an improved temperature coefficient (0/+200ppm/°C vs 0/+350ppm/°C). Both parts maintain ROHS3 compliance and MSL-1 rating. The RL1220S-R39-F has an Active product status with available inventory.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-R39-F serves as a direct substitute for the obsolete RP2012T-R39-F. Both parts are manufactured by Susumu and share identical electrical specifications (390 mOhms, ±1%, 0.333W) and physical footprints (0805/2012 Metric, 2.00mm x 1.25mm x 0.50mm). The substitute maintains full compliance with ROHS3, REACH Unaffected status, ECCN EAR99, and HTSUS 8533.21.0030 classifications. The RL1220S-R39-F has an Active product status with available inventory of 55,952 pieces in Tape & Reel packaging, supporting volume production requirements. Both components carry MSL-1 rating, indicating unlimited floor life.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters for substituting RP2012T-R39-F?
A: Resistance (390 mOhms), tolerance (±1%), power rating (0.333W), package size (0805/2012 Metric), operating temperature range (-55°C ~ 125°C), and physical dimensions (2.00mm x 1.25mm x 0.50mm) must match for direct substitution.

Q: Is the difference in composition between Metal Film and Thin Film significant for substitution?
A: Both Metal Film and Thin Film resistors meet the specified electrical parameters. The RL1220S-R39-F Thin Film composition provides a temperature coefficient of 0/+200ppm/°C compared to 0/+350ppm/°C for the original Metal Film part.

Q: Are there any PCB layout modifications required when using RL1220S-R39-F?
A: No modifications are required. The substitute maintains identical package dimensions (0.079" L x 0.049" W), height (0.020" max), and termination configuration (2 terminals).

Q: What is the difference in temperature coefficient between the original and substitute parts?
A: The RP2012T-R39-F has a temperature coefficient of 0/+350ppm/°C, while the RL1220S-R39-F has 0/+200ppm/°C. Both operate within the same -55°C ~ 125°C temperature range.

Q: Is the Current Sense feature of RL1220S-R39-F compatible with general resistor applications?
A: The Current Sense designation indicates optimized performance for current measurement applications. The part meets all electrical specifications of the original RP2012T-R39-F.

Q: Are both parts compliant with current environmental regulations?
A: Both RP2012T-R39-F and RL1220S-R39-F are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.