RP2012T-2R2-F Equivalent & Substitute Parts

Part Overview

The RP2012T-2R2-F is a 2.2 Ohm ±1% metal film chip resistor rated at 0.333W (1/3W) in 0805 (2012 Metric) surface mount package. This part is manufactured by Susumu and carries an Obsolete product status. Due to its obsolete classification, identifying equivalent substitute components is necessary to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Substiute Parts

RP2012T-2R2-F

SusumuIn Stock: 1019RP2012T-2R2-F Datasheet

Current PartRFQ

RL1220S-2R2-F

SusumuIn Stock: 5311RL1220S-2R2-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RP2012T-2R2-F is determined by the following critical parameters:

Electrical Parameters:

• Resistance value: 2.2 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.333W minimum (equal or greater acceptable)

Mechanical Parameters:

• Package type: 0805 (2012 Metric) (exact match required)
• Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) (exact match required)
• Number of terminations: 2 (exact match required)

Environmental & Compliance Parameters:

• Operating temperature range: -55°C ~ 125°C (equal or wider range acceptable)
• RoHS3 compliance (required)
• Moisture Sensitivity Level 1 (required)

The RL1220S-2R2-F qualifies as a direct substitute based on matching all critical electrical, mechanical, and compliance parameters. Composition variation from metal film to thin film does not preclude substitution when all other parameters align.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-2R2-F is a direct functional equivalent to the RP2012T-2R2-F for applications requiring a 2.2 Ohm ±1% 0.333W 0805 chip resistor. Selection of the RL1220S-2R2-F is supported by the following factors:

Product Status: The RL1220S-2R2-F carries Active product status, ensuring continued availability and manufacturing support, whereas the RP2012T-2R2-F is Obsolete.

Compliance Certification: Both parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 rating, meeting current regulatory and environmental requirements.

Electrical Performance: The RL1220S-2R2-F exhibits a superior temperature coefficient (0 / +200ppm/°C) compared to the main part (0 / +350ppm/°C), resulting in improved stability across the operating temperature range of -55°C ~ 125°C.

Mechanical Compatibility: Identical package dimensions, termination count, and seated height ensure direct board-level compatibility without layout or assembly modifications.

Composition Difference: The RL1220S-2R2-F utilizes thin film construction with current sense capability, whereas the RP2012T-2R2-F uses metal film construction. This composition difference does not affect substitution validity when all electrical and mechanical parameters align.

Frequently Asked Questions (FAQ)

Q: Can the RL1220S-2R2-F be used as a direct replacement for the RP2012T-2R2-F on existing PCBs?

A: Yes. The RL1220S-2R2-F is mechanically and electrically compatible with the RP2012T-2R2-F. Both parts share identical package dimensions (0805 / 2012 Metric), seated height (0.020" / 0.50mm), and electrical specifications (2.2 Ohms ±1%, 0.333W). No PCB layout or assembly process modifications are required.

Q: What is the significance of the composition difference between metal film and thin film?

A: Composition differences reflect manufacturing process variations. The RL1220S-2R2-F thin film construction provides a superior temperature coefficient (0 / +200ppm/°C) compared to the RP2012T-2R2-F metal film (0 / +350ppm/°C). This results in improved resistance stability across temperature variations, making the substitute part suitable for precision applications.

Q: Why is the RL1220S-2R2-F marked as Active while the RP2012T-2R2-F is Obsolete?

A: Product status reflects manufacturer lifecycle decisions. The RL1220S-2R2-F remains in active production, ensuring long-term supply availability. The RP2012T-2R2-F has been discontinued. Transitioning to the active substitute part eliminates supply chain risk for future production.

Q: Are there any packaging differences between these parts?

A: The RP2012T-2R2-F is supplied in standard packaging, while the RL1220S-2R2-F is supplied in Tape & Reel (TR) format. Both formats contain identical components. Tape & Reel packaging is standard for high-volume surface mount assembly operations and does not affect component performance or compatibility.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both the RP2012T-2R2-F and RL1220S-2R2-F are ROHS3 compliant and REACH unaffected. Both carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Q: What is the current sensing feature of the RL1220S-2R2-F?

A: The RL1220S-2R2-F is designated as a current sense resistor, indicating it is optimized for current measurement applications. This feature does not preclude use in standard resistive applications and does not affect substitution validity for general-purpose 2.2 Ohm resistor requirements.