RP2012T-1R8-G Equivalent & Substitute Parts

Part Overview

The RP2012T-1R8-G is a 1.8 Ohms ±2% metal film chip resistor rated at 0.333W (1/3W) in 0805 (2012 Metric) surface mount package manufactured by Susumu. This part is classified as obsolete, necessitating identification of active equivalent components for ongoing production and maintenance applications. The substitute part RL1220S-1R8-G provides functional equivalence with identical electrical specifications while maintaining current product status and availability.

Substiute Parts

RP2012T-1R8-G

SusumuIn Stock: 851RP2012T-1R8-G Datasheet

Current PartRFQ

RL1220S-1R8-G

SusumuIn Stock: 1106RL1220S-1R8-G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The RL1220S-1R8-G qualifies as a direct substitute for the RP2012T-1R8-G based on the following critical parameters:

Matching Electrical Specifications:

• Resistance: 1.8 Ohms (identical)
• Tolerance: ±2% (identical)
• Power Rating: 0.333W / 1/3W (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)

Matching Mechanical Specifications:

• Package / Case: 0805 (2012 Metric) (identical)
• Physical Dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) (identical)
• Height - Seated (Max): 0.020" (0.50mm) (identical)
• Number of Terminations: 2 (identical)

Matching Compliance & Environmental:

• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)
• REACH Status: REACH Unaffected (identical)
• ECCN: EAR99 (identical)
• HTSUS: 8533.21.0030 (identical)

The primary difference is product composition (Metal Film vs. Thin Film) and temperature coefficient specification, which do not restrict substitution when electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-1R8-G is the direct equivalent for the obsolete RP2012T-1R8-G. Selection of the substitute part is based on the following engineering criteria:

Product Status Consideration: The RP2012T-1R8-G is classified as obsolete. The RL1220S-1R8-G maintains active product status with current manufacturing and distribution support, ensuring long-term availability for production and field replacement applications.

Electrical Equivalence: Both parts deliver identical resistance (1.8 Ohms), tolerance (±2%), and power rating (0.333W). The operating temperature range (-55°C ~ 125°C) is identical, supporting equivalent thermal performance across all specified environmental conditions.

Mechanical Compatibility: The 0805 (2012 Metric) package, physical dimensions, and termination configuration are identical between both parts. Direct PCB footprint compatibility is confirmed, eliminating layout redesign requirements.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN/HTSUS classifications. Moisture sensitivity level 1 (unlimited) provides equivalent handling and storage requirements.

Composition Difference: The RL1220S-1R8-G employs thin film construction with current sense capability and improved temperature coefficient (0 / +200ppm/°C) compared to the metal film construction of the RP2012T-1R8-G (0 / +350ppm/°C). This represents a performance enhancement for temperature-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the RL1220S-1R8-G be used as a direct replacement for the RP2012T-1R8-G without PCB modification?

A: Yes. Both parts share identical 0805 (2012 Metric) package specifications, physical dimensions (0.079" L x 0.049" W), and termination configuration. Direct PCB footprint compatibility is confirmed. No layout changes are required.

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

A: The RP2012T-1R8-G uses metal film construction, while the RL1220S-1R8-G uses thin film construction. Both deliver identical resistance value, tolerance, and power rating. The thin film variant offers improved temperature coefficient performance (0 / +200ppm/°C vs. 0 / +350ppm/°C) and includes current sense capability.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and equivalent ECCN/HTSUS classifications. Moisture sensitivity level 1 (unlimited) is identical for both parts.

Q: Why is the RP2012T-1R8-G classified as obsolete?

A: The RP2012T-1R8-G is listed as obsolete by the manufacturer. The RL1220S-1R8-G is the active equivalent, ensuring continued availability and manufacturing support for new designs and field replacements.

Q: What is the packaging difference between these parts?

A: The RP2012T-1R8-G packaging is not specified in available documentation. The RL1220S-1R8-G is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly operations.

Q: Are the operating temperature ranges identical?

A: Yes. Both parts operate across the identical temperature range of -55°C ~ 125°C, confirming equivalent thermal performance in all specified environmental conditions.

Q: What does "current sense" capability mean for the RL1220S-1R8-G?

A: Current sense designation indicates the thin film construction is optimized for accurate current measurement applications. This feature does not restrict use in standard resistive applications and represents a performance enhancement over the metal film variant.