RC2012J304CS 300kΩ 0805 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC2012J304CS is a 300 kΩ ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component operates at 0.125W (1/8W) power rating with moisture-resistant construction and is classified as Active product status. The part is ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity).

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size, termination count, height), and environmental operating parameters. Substitute parts enable design flexibility, supply chain optimization, and performance enhancement through tolerance or feature upgrades.

Substiute Parts

RC2012J304CS

Samsung Electro-MechanicsIn Stock: 986RC2012J304CS Datasheet

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RC0805JR-07300KL

YAGEOIn Stock: 13600RC0805JR-07300KL Datasheet

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AC0805FR-07300KL

YAGEOIn Stock: 2523AC0805FR-07300KL Datasheet

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CR0805-FX-3003ELF

Bourns Inc.In Stock: 39423CR0805-FX-3003ELF Datasheet

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ERJ-6ENF3003V

Panasonic Electronic ComponentsIn Stock: 128807ERJ-6ENF3003V Datasheet

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KTR10EZPF3003

Rohm SemiconductorIn Stock: 5102KTR10EZPF3003 Datasheet

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RC0805FR-07300KL

YAGEOIn Stock: 1563RC0805FR-07300KL Datasheet

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RMCF0805FT300K

Stackpole Electronics IncIn Stock: 73720RMCF0805FT300K Datasheet

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CRCW0805300KFKEA

Vishay DaleIn Stock: 29791CRCW0805300KFKEA Datasheet

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CRCW0805300KFKEAHP

Vishay DaleIn Stock: 18712CRCW0805300KFKEAHP Datasheet

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RCS0805300KFKEA

Vishay DaleIn Stock: 16128RCS0805300KFKEA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution compatibility:

Direct Substitutes (Equivalent Tolerance): Parts matching the main part's ±5% tolerance specification. These provide pin-for-pin, footprint-compatible replacement with identical electrical performance characteristics.

Upgrade Substitutes (Enhanced Tolerance): Parts with ±1% tolerance specification, offering improved accuracy over the baseline ±5% tolerance. These maintain identical resistance value, power rating, package dimensions, and operating temperature range. Upgrade substitutes provide performance enhancement without design modification.

Similar Substitutes (Modified Power Rating): Parts with identical resistance, tolerance, and package but different power ratings (0.5W instead of 0.125W). These require thermal design verification but maintain electrical compatibility and mechanical footprint.

Key Parameters Determining Substitution:

• Resistance value: 300 kΩ (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Operating temperature range: -55°C to +155°C (minimum requirement)
• Composition: Thick Film (technology match)
• Number of terminations: 2 (exact match required)
• RoHS compliance: ROHS3 (regulatory requirement)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Equivalent Performance): RC0805JR-07300KL from YAGEO provides direct substitution with matching ±5% tolerance and 0.125W power rating. This part maintains identical electrical specifications and is suitable for applications where tolerance and power requirements are non-critical. YAGEO RC series components are ROHS3 compliant with MSL Level 1 rating.

For Tolerance Upgrade (Improved Accuracy): AC0805FR-07300KL, CR0805-FX-3003ELF, ERJ-6ENF3003V, KTR10EZPF3003, RC0805FR-07300KL, and RMCF0805FT300K all provide ±1% tolerance specification. These parts are suitable for applications requiring tighter resistance tolerance without design modification. Multiple upgrade options carry Automotive AEC-Q200 certification, indicating qualification for automotive-grade reliability standards.

For Power Rating Enhancement: CRCW0805300KFKEAHP and RCS0805300KFKEA provide 0.5W (1/2W) power rating in identical 0805 package footprint. These parts are applicable to designs requiring increased thermal dissipation capability. Both feature Automotive AEC-Q200 certification and pulse withstanding capability.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory alignment with the main part. Automotive-qualified parts (AEC-Q200) are available across upgrade and similar categories for applications requiring automotive-grade component qualification.

Frequently Asked Questions (FAQ)

Q1: Can RC0805JR-07300KL directly replace RC2012J304CS without design changes?

A: Yes. RC0805JR-07300KL is a direct substitute with matching 300 kΩ resistance, ±5% tolerance, 0.125W power rating, and 0805 package. Physical dimensions and operating temperature range are identical. No circuit design modification is required.

Q2: What is the advantage of upgrading to ±1% tolerance parts?

A: Upgrade parts (AC0805FR-07300KL, CR0805-FX-3003ELF, etc.) provide tighter resistance tolerance (±1% vs. ±5%), resulting in improved circuit accuracy and reduced performance variation across production batches. This is beneficial for precision analog circuits, reference networks, and applications with tight tolerance requirements.

Q3: Are the 0.5W power rating parts (CRCW0805300KFKEAHP, RCS0805300KFKEA) compatible with designs specified for 0.125W?

A: These parts are mechanically and electrically compatible but have higher power dissipation capability. They are suitable for applications where thermal margin is required or where circuit conditions may exceed nominal power specifications. Verify that PCB thermal design accommodates the higher power rating.

Q4: What does Automotive AEC-Q200 certification indicate?

A: AEC-Q200 certification indicates the component meets automotive industry reliability and qualification standards. Parts carrying this certification (AC0805FR-07300KL, ERJ-6ENF3003V, KTR10EZPF3003, RMCF0805FT300K, CRCW0805300KFKEA, RCS0805300KFKEA) are qualified for automotive applications requiring enhanced reliability and environmental stress testing.

Q5: Does packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affect electrical performance?

A: Packaging format does not affect electrical performance. Tape & Reel (TR) packaging is suitable for automated assembly processes. Cut Tape (CT) & Digi-Reel packaging provides flexibility for lower-volume or mixed-component assembly. Selection depends on manufacturing process requirements, not circuit functionality.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the main part RC2012J304CS. MSL Level 1 (Unlimited) rating is consistent across all parts, indicating no moisture sensitivity restrictions during storage and handling.

Q7: What is the significance of "High Voltage" feature in KTR10EZPF3003?

A: The High Voltage feature indicates enhanced voltage withstanding capability. KTR10EZPF3003 is suitable for applications with elevated voltage stress conditions. This feature does not affect standard-voltage applications but provides additional design margin for high-voltage circuits.

Q8: Can parts with different height specifications be used interchangeably on the same PCB?

A: Height differences (0.50mm to 0.70mm maximum seated height) are within typical PCB assembly tolerances for 0805 components. Interchangeability is mechanically feasible. Verify that specific PCB design constraints (clearance, wave solder profile, conformal coating) do not impose height restrictions.