RP2012T-R18-F Equivalent & Substitute Parts

Part Overview

The RP2012T-R18-F is a 180 mOhms ±1% metal film chip resistor rated at 0.333W (1/3W) in 0805 (2012 Metric) package format manufactured by Susumu. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure procurement availability for applications requiring this specific resistance value and power rating.

Substiute Parts

RP2012T-R18-F

SusumuIn Stock: 813RP2012T-R18-F Datasheet

Current PartRFQ

RL1220S-R18-F

SusumuIn Stock: 28965RL1220S-R18-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RP2012T-R18-F is determined by strict equivalence across the following parameters:

• Resistance Value: 180 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 0.333W / 1/3W (exact match required)
• Package Format: 0805 (2012 Metric) (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The substitute part RL1220S-R18-F meets all mandatory electrical and mechanical parameters. The primary distinction is the composition type (Thin Film with Current Sense feature versus Metal Film) and temperature coefficient specification, which do not preclude functional substitution within the defined parameter set.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-R18-F serves as a direct substitute for the RP2012T-R18-F based on electrical and mechanical parameter equivalence. The RL1220S-R18-F maintains active product status with Susumu, ensuring continued availability and supply chain reliability. Both components satisfy ROHS3 compliance and REACH regulatory requirements. The substitute part features improved temperature coefficient performance (0 / +200ppm/°C versus 0 / +350ppm/°C), which provides enhanced stability across the operating temperature range. Packaging, footprint, and termination configuration are identical, enabling direct board-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the RL1220S-R18-F replace the RP2012T-R18-F in existing designs?

A: Yes. Both components share identical resistance value (180 mOhms), tolerance (±1%), power rating (0.333W), package format (0805), operating temperature range (-55°C ~ 125°C), and regulatory compliance status. Physical dimensions and termination count are identical, permitting direct substitution.

Q: What is the difference between Metal Film and Thin Film composition?

A: The RP2012T-R18-F uses Metal Film construction, while the RL1220S-R18-F uses Thin Film construction with Current Sense feature. Both compositions meet the specified electrical parameters. The Thin Film variant exhibits a lower temperature coefficient (0 / +200ppm/°C versus 0 / +350ppm/°C), indicating improved temperature stability.

Q: Are there packaging differences between these parts?

A: The RP2012T-R18-F is supplied in standard packaging, while the RL1220S-R18-F is supplied in Tape & Reel (TR) format. Both use identical 0805 (2012 Metric) package format with matching physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and height (0.020" / 0.50mm maximum seated height).

Q: Why is the RP2012T-R18-F marked as obsolete?

A: The RP2012T-R18-F carries obsolete product status. The RL1220S-R18-F maintains active status with the manufacturer, ensuring ongoing availability and support for new procurement requirements.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the RP2012T-R18-F and RL1220S-R18-F are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the Current Sense feature on the RL1220S-R18-F?

A: The Current Sense designation indicates the RL1220S-R18-F is optimized for current sensing applications. This feature does not affect basic substitution compatibility for standard 180 mOhms ±1% 0.333W resistor applications.