RP2012S-390-F Equivalent & Substitute Parts

Part Overview

The RP2012S-390-F is a 39 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, identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. The part maintains full RoHS3 compliance and operates across the industrial temperature range of -55°C to 125°C.

Substiute Parts

RP2012S-390-F

SusumuIn Stock: 1026RP2012S-390-F Datasheet

Current PartRFQ

RL1220S-390-F

SusumuIn Stock: 878RL1220S-390-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RP2012S-390-F is determined by strict equivalence across the following critical parameters:

• Resistance Value: 39 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 0.333W / 1/3W (exact match required)
• 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)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Temperature Coefficient: 0 / +200ppm/°C (exact match required)
• Regulatory Compliance: RoHS3 Compliant, REACH Unaffected (exact match required)

The RL1220S-390-F qualifies as a direct substitute based on full alignment with all critical electrical and mechanical parameters. While the RL1220S-390-F utilizes thin film composition with current sense features compared to the metal film composition of the RP2012S-390-F, both parts deliver identical electrical performance within the specified tolerance and operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The RL1220S-390-F is a direct functional equivalent to the RP2012S-390-F for applications requiring a 39 Ohm ±1% resistor in 0805 package format. The RL1220S-390-F maintains active product status with Susumu, ensuring ongoing availability and supply chain continuity. Both parts satisfy identical electrical specifications, dimensional requirements, and regulatory compliance standards including RoHS3 and REACH certifications.

The primary distinction between the two parts is composition type: the RP2012S-390-F uses metal film technology while the RL1220S-390-F employs thin film technology with current sense capability. This compositional difference does not affect electrical performance within the specified tolerance and operating parameters. The RL1220S-390-F is available in Tape & Reel packaging, which is standard for production environments, whereas the RP2012S-390-F is supplied in bulk packaging.

Selection of the RL1220S-390-F eliminates obsolescence risk and provides access to an active product line with established supply channels.

Frequently Asked Questions (FAQ)

Q: Can the RL1220S-390-F be used as a direct replacement for the RP2012S-390-F in existing designs?

A: Yes. The RL1220S-390-F meets all electrical and mechanical specifications of the RP2012S-390-F. Both parts deliver 39 Ohms ±1% resistance, 0.333W power rating, identical operating temperature range, and matching physical dimensions in 0805 package format. No design modifications are required.

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

A: Both metal film (RP2012S-390-F) and thin film (RL1220S-390-F) compositions deliver the specified electrical performance within ±1% tolerance and 0 / +200ppm/°C temperature coefficient. The thin film variant includes current sense features. For applications where only standard resistive function is required, both compositions are electrically equivalent.

Q: Are there packaging differences between these parts?

A: Yes. The RP2012S-390-F is supplied in bulk packaging, while the RL1220S-390-F is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes. Both parts use identical 0805 (2012 Metric) surface mount package dimensions.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the RP2012S-390-F and RL1220S-390-F are RoHS3 compliant and REACH unaffected. Both maintain Moisture Sensitivity Level 1 (Unlimited) rating and operate across -55°C to 125°C temperature range.

Q: Why is the RP2012S-390-F listed as obsolete?

A: The RP2012S-390-F has been discontinued by Susumu. The RL1220S-390-F represents the active product line equivalent, ensuring continued availability and supply chain support for this resistance value and package specification.

Q: Are there any performance differences in high-frequency or precision applications?

A: Both parts maintain identical temperature coefficient (0 / +200ppm/°C) and tolerance (±1%). Selection between metal film and thin film composition should be based on application-specific requirements beyond the standard electrical parameters provided.