RP2012S-180-F Equivalent & Substitute Parts

Part Overview

The RP2012S-180-F is an 18 Ohms ±1% metal film chip resistor rated at 0.333W (1/3W) in 0805 (2012 Metric) surface mount package. This component is manufactured by Susumu and is currently classified as obsolete. Due to its obsolete status, equivalent substitute parts with identical electrical and mechanical specifications are necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

RP2012S-180-F

SusumuIn Stock: 956RP2012S-180-F Datasheet

Current PartRFQ

RL1220S-180-F

SusumuIn Stock: 791RL1220S-180-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RP2012S-180-F is based on strict equivalence across the following critical parameters:

Electrical Equivalence:

• Resistance value: 18 Ohms
• Tolerance: ±1%
• Power rating: 0.333W (1/3W)
• Temperature coefficient: 0 / +200ppm/°C
• Operating temperature range: -55°C ~ 125°C

Mechanical Equivalence:

• Package type: 0805 (2012 Metric)
• Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
• Height - Seated (Max): 0.020" (0.50mm)
• Number of terminations: 2

Compliance Equivalence:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part RL1220S-180-F meets all electrical and mechanical requirements for direct substitution. The composition difference (Metal Film vs. Thin Film) does not affect functional compatibility within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-180-F is a direct functional equivalent to the RP2012S-180-F and is suitable for substitution based on the following factors:

Product Status Consideration: The RP2012S-180-F is classified as obsolete, making the RL1220S-180-F an active alternative from the same manufacturer. The substitute part maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance and Certification: Both parts maintain identical RoHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production environments. Moisture Sensitivity Level 1 (Unlimited) classification is maintained across both parts.

Electrical and Mechanical Compatibility: All critical electrical parameters (resistance, tolerance, power rating, temperature coefficient, and operating temperature range) are identical. Physical dimensions and package specifications are fully compatible, enabling direct PCB layout substitution without design modification.

Composition Difference: The RL1220S-180-F utilizes thin film composition with current sense capability, compared to the metal film composition of the RP2012S-180-F. This composition difference does not affect functional performance within the specified electrical parameters and operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the RL1220S-180-F be used as a direct replacement for the RP2012S-180-F on existing PCBs?

A: Yes. The RL1220S-180-F is mechanically and electrically compatible with the RP2012S-180-F. Both parts share identical 0805 (2012 Metric) package dimensions, footprint requirements, and electrical specifications. No PCB layout modifications are required.

Q: What is the difference between metal film and thin film composition in these resistors?

A: The RP2012S-180-F uses metal film construction, while the RL1220S-180-F uses thin film construction with current sense capability. Both compositions deliver the specified 18 Ohms ±1% resistance, 0.333W power rating, and 0 / +200ppm/°C temperature coefficient within the -55°C ~ 125°C operating range.

Q: Are there packaging differences between these parts?

A: The RL1220S-180-F is supplied in Tape & Reel (TR) format. Packaging format does not affect component performance or PCB assembly compatibility. Verify packaging requirements for your production process.

Q: Why is the RP2012S-180-F classified as obsolete?

A: The RP2012S-180-F is no longer in active production. The RL1220S-180-F represents the active equivalent from Susumu, ensuring continued availability and supply chain support.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the RP2012S-180-F and RL1220S-180-F are ROHS3 compliant, REACH unaffected, and classified as Moisture Sensitivity Level 1 (Unlimited). Compliance requirements are identical across both parts.

Q: What is the current sense feature on the RL1220S-180-F?

A: The RL1220S-180-F is designated as a current sense thin film resistor. This classification indicates suitability for current measurement applications. The electrical specifications remain identical to the RP2012S-180-F.

Q: Are the temperature coefficients identical between these parts?

A: Yes. Both parts maintain a temperature coefficient of 0 / +200ppm/°C and operate across the identical -55°C ~ 125°C temperature range.