RC2012J390CS 39 Ohm 0805 SMD Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC2012J390CS is a 39 Ohm ±5% 0.125W (1/8W) thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with moisture-resistant construction, RoHS3 compliance, and MSL 1 rating. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (package size, termination count) while accounting for tolerance upgrades and feature enhancements available from alternative manufacturers.

Substiute Parts

RC2012J390CS

Samsung Electro-MechanicsIn Stock: 2043RC2012J390CS Datasheet

Current PartRFQ

RC0805JR-0739RL

YAGEOIn Stock: 82747RC0805JR-0739RL Datasheet

DirectRFQ

ERJ-6ENF39R0V

Panasonic Electronic ComponentsIn Stock: 198043ERJ-6ENF39R0V Datasheet

UpgradeRFQ

KTR10EZPF39R0

Rohm SemiconductorIn Stock: 10542KTR10EZPF39R0 Datasheet

UpgradeRFQ

MCR10ERTF39R0

Rohm SemiconductorIn Stock: 1016MCR10ERTF39R0 Datasheet

UpgradeRFQ

RC0805FR-0739RL

YAGEOIn Stock: 3089RC0805FR-0739RL Datasheet

UpgradeRFQ

RMCF0805FT39R0

Stackpole Electronics IncIn Stock: 99106RMCF0805FT39R0 Datasheet

UpgradeRFQ

CRCW080539R0FKEA

Vishay DaleIn Stock: 20041CRCW080539R0FKEA Datasheet

SimilarRFQ

CRCW080539R0FKEAHP

Vishay DaleIn Stock: 47233CRCW080539R0FKEAHP Datasheet

SimilarRFQ

ERJ-UP6F39R0V

Panasonic Electronic ComponentsIn Stock: 5912ERJ-UP6F39R0V Datasheet

SimilarRFQ

RCS080539R0FKEA

Vishay DaleIn Stock: 6115RCS080539R0FKEA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on electrical and mechanical compatibility with the RC2012J390CS:

Direct Equivalent (Tolerance Match: ±5%)

• RC0805JR-0739RL (YAGEO): Identical electrical specifications (39Ω ±5% 1/8W) with equivalent mechanical dimensions and environmental ratings. Packaging differs (Tape & Reel vs. Cut Tape) but component performance is functionally equivalent.

Upgrade Substitutes (Tolerance Improvement: ±1%)

• ERJ-6ENF39R0V (Panasonic Electronic Components)
• KTR10EZPF39R0 (Rohm Semiconductor)
• MCR10ERTF39R0 (Rohm Semiconductor)
• RC0805FR-0739RL (YAGEO)
• RMCF0805FT39R0 (Stackpole Electronics Inc)

These parts maintain the 39Ω resistance, 0.125W power rating, and 0805 package while providing tighter tolerance (±1% vs. ±5%). All operate within -55°C to 155°C range with ±100ppm/°C temperature coefficient. Several include automotive AEC-Q200 qualification. These are direct functional upgrades suitable for applications requiring improved accuracy.

Similar Parts (Power Rating or Feature Variation)

• CRCW080539R0FKEA (Vishay Dale): 39Ω ±1% 1/8W with AEC-Q200 automotive rating
• CRCW080539R0FKEAHP (Vishay Dale): 39Ω ±1% 0.5W (1/2W) with AEC-Q200 and pulse withstanding capability
• ERJ-UP6F39R0V (Panasonic Electronic Components): 39Ω ±1% 0.5W (1/2W) with anti-sulfur, AEC-Q200, and pulse withstanding features
• RCS080539R0FKEA (Vishay Dale): 39Ω ±1% 0.5W (1/2W) with AEC-Q200 and pulse withstanding capability

These parts share the 39Ω resistance and 0805 package but differ in power rating (0.5W vs. 0.125W) or include additional features. Selection depends on application thermal requirements and environmental conditions.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Electrical and Mechanical Equivalence)

RC0805JR-0739RL (YAGEO) provides direct functional equivalence to RC2012J390CS with identical electrical specifications (39Ω ±5% 0.125W) and mechanical compatibility (0805 package, 2 terminations). Both components maintain RoHS3 compliance and MSL 1 rating. Packaging format differs (Tape & Reel vs. Cut Tape), which affects procurement and assembly logistics but not component performance. This part is suitable for applications where the original ±5% tolerance specification is acceptable.

For Tolerance Upgrade Applications

Five upgrade substitutes provide ±1% tolerance improvement while maintaining 39Ω resistance, 0.125W power rating, and 0805 package:

• RC0805FR-0739RL (YAGEO): Maintains moisture-resistant feature from original manufacturer series with improved tolerance. Active product status with established supply chain.
• ERJ-6ENF39R0V (Panasonic Electronic Components): Includes automotive AEC-Q200 qualification for applications requiring automotive-grade reliability.
• KTR10EZPF39R0 (Rohm Semiconductor): Combines AEC-Q200 automotive rating with high-voltage capability for demanding electrical environments.
• RMCF0805FT39R0 (Stackpole Electronics Inc): Automotive AEC-Q200 qualified with high inventory availability (99,058 units).
• MCR10ERTF39R0 (Rohm Semiconductor): Provides ±1% tolerance upgrade but is discontinued at DiGi Electronics; use only if existing inventory is available.

For Enhanced Power Dissipation or Automotive Applications

Three parts offer 0.5W (1/2W) power rating with automotive AEC-Q200 qualification:

• CRCW080539R0FKEAHP (Vishay Dale): 0.5W with pulse withstanding capability for transient protection applications.
• ERJ-UP6F39R0V (Panasonic Electronic Components): 0.5W with anti-sulfur feature and pulse withstanding for harsh environmental conditions.
• RCS080539R0FKEA (Vishay Dale): 0.5W with pulse withstanding for applications requiring enhanced thermal margin.

These parts are suitable only if the application circuit requires higher power dissipation capacity than the original 0.125W specification.

Product Status Considerations

All recommended substitutes maintain Active product status except MCR10ERTF39R0, which is discontinued at DiGi Electronics. For new designs and long-term supply assurance, select from parts with Active status. MCR10ERTF39R0 is acceptable only for legacy system maintenance where existing inventory is confirmed available.

Frequently Asked Questions (FAQ)

Q: Can RC0805JR-0739RL replace RC2012J390CS directly in production?

A: Yes. RC0805JR-0739RL is electrically and mechanically equivalent with identical 39Ω ±5% 0.125W specifications and 0805 package. The primary difference is packaging format (Tape & Reel vs. Cut Tape). Both components meet RoHS3 compliance and MSL 1 requirements. Verify procurement and assembly process compatibility with Tape & Reel format.

Q: What is the advantage of upgrading to ±1% tolerance parts?

A: Upgrade substitutes (ERJ-6ENF39R0V, KTR10EZPF39R0, RC0805FR-0739RL, RMCF0805FT39R0) provide tighter tolerance (±1% vs. ±5%), reducing circuit performance variation. This is beneficial for precision analog circuits, signal conditioning, and applications where resistor accuracy directly affects system performance. All upgrade parts maintain identical 39Ω resistance, 0.125W power rating, and 0805 package dimensions.

Q: Are automotive AEC-Q200 parts suitable for non-automotive applications?

A: Yes. Automotive AEC-Q200 qualified parts (ERJ-6ENF39R0V, KTR10EZPF39R0, RMCF0805FT39R0, CRCW080539R0FKEA, CRCW080539R0FKEAHP, ERJ-UP6F39R0V, RCS080539R0FKEA) meet enhanced reliability and environmental stress testing requirements. These parts are fully compatible with non-automotive applications and provide superior reliability margin. AEC-Q200 qualification does not restrict use to automotive circuits.

Q: When should I select 0.5W (1/2W) power-rated parts?

A: Select 0.5W parts (CRCW080539R0FKEAHP, ERJ-UP6F39R0V, RCS080539R0FKEA) only if circuit analysis confirms power dissipation exceeds 0.125W capacity. The original RC2012J390CS is rated 0.125W; upgrading to 0.5W is unnecessary for applications within this thermal budget. Higher power rating increases component size and cost without functional benefit in low-power circuits.

Q: What is the difference between moisture-resistant and standard thick film resistors?

A: RC2012J390CS and RC0805FR-0739RL include moisture-resistant construction, providing enhanced protection in humid or corrosive environments. Standard thick film parts (ERJ-6ENF39R0V, KTR10EZPF39R0, RMCF0805FT39R0, CRCW080539R0FKEA) do not specify moisture resistance but maintain MSL 1 rating. For applications in high-humidity or marine environments, moisture-resistant variants are preferred.

Q: Is MCR10ERTF39R0 available for new designs?

A: MCR10ERTF39R0 is discontinued at DiGi Electronics and not recommended for new designs. Use active alternatives: RC0805FR-0739RL (YAGEO), ERJ-6ENF39R0V (Panasonic), KTR10EZPF39R0 (Rohm), or RMCF0805FT39R0 (Stackpole). All provide ±1% tolerance upgrade with confirmed long-term availability.

Q: Do all substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use 0805 (2012 Metric) package with identical 0.079" L × 0.049" W (2.00mm × 1.25mm) dimensions and 2-termination configuration. Height variation (0.020" to 0.028" seated maximum) is within standard PCB assembly tolerances and does not affect footprint compatibility. Verify component height clearance in high-density layouts.

Q: What is the temperature coefficient specification and why does it matter?

A: All listed parts specify ±100ppm/°C temperature coefficient, indicating resistance value changes approximately 0.01% per °C temperature change. This specification is identical across all substitutes and the original part. For applications operating across the full -55°C to 155°C range, temperature coefficient affects circuit accuracy but is consistent across all options.

Q: Can I use CRCW080539R0FKEAHP (0.5W) in place of RC2012J390CS (0.125W)?

A: Electrically and mechanically, yes. CRCW080539R0FKEAHP maintains 39Ω ±1% resistance and 0805 package. However, the 0.5W rating is unnecessary for circuits designed for 0.125W dissipation. Use only if circuit redesign requires higher power capacity or if thermal margin improvement is a design objective. Standard 0.125W parts are more cost-effective for existing designs.