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RC2012J301CS 300 Ohm 5% 1/8W 0805 Chip Resistor Equivalent & Substitute Parts
Part Overview
The RC2012J301CS is a thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 300 Ohms with ±5% tolerance and 0.125W (1/8W) power dissipation in 0805 (2012 Metric) package format. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). The part is supplied in Tape & Reel (TR) packaging with 2900 pieces currently in stock.
Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, power rating, tolerance grade) and mechanical compatibility (package size, form factor, termination count). Alternative sources provide identical or upgraded performance characteristics while maintaining functional interchangeability within the same application circuit requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Resistance | 300 | Ohms |
| Tolerance | ±5% | - |
| Power Rating | 0.125 | W (1/8W) |
| Package / Case | 0805 (2012 Metric) | - |
| Composition | Thick Film | - |
| Temperature Coefficient | ±100 | ppm/°C |
| Operating Temperature Range | -55 to 155 | °C |
| Number of Terminations | 2 | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitution logic for the RC2012J301CS is determined by the following critical parameters:
Electrical Compatibility Requirements:
- Resistance value: 300 Ohms (exact match required)
- Power dissipation: 0.125W minimum (equal or higher acceptable)
- Tolerance: ±5% or better (±1% tolerance parts are upgrades)
- Temperature coefficient: ±100ppm/°C or better
- Operating temperature range: -55°C to 155°C minimum
Mechanical Compatibility Requirements:
- Package format: 0805 (2012 Metric) only
- Number of terminations: 2 (standard SMD configuration)
- Composition: Thick film technology
- Moisture sensitivity: MSL 1 or equivalent
- RoHS compliance: ROHS3 Compliant
Substitution Categories:
Upgrade Parts (±1% tolerance): RC2012F301CS, AC0805FR-07300RL, CR0805-FX-3000ELF, ERJ-6ENF3000V, KTR10EZPF3000, RC0805FR-07300RL, RMCF0805FT300R. These parts provide tighter tolerance specifications while maintaining all other electrical and mechanical parameters.
Direct Equivalent (±5% tolerance, same manufacturer series): RC0805JR-07300RL from YAGEO provides identical electrical specifications with equivalent mechanical form factor.
Similar Parts (±5% tolerance, alternative manufacturers): AC0805JR-07300RL, CRCW0805300RFKEA. These maintain tolerance and electrical performance with potential feature additions (AEC-Q200 automotive qualification).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Resistance (Ohms) | Tolerance | Power (W) | Package | Temp Coeff (ppm/°C) | Op Temp (°C) | Features | RoHS | MSL |
|---|---|---|---|---|---|---|---|---|---|---|
| RC2012J301CS | Samsung Electro-Mechanics | 300 | ±5% | 0.125 | 0805 | ±100 | -55 to 155 | Moisture Resistant | ROHS3 | 1 |
| RC2012F301CS | Samsung Electro-Mechanics | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Moisture Resistant | ROHS3 | 1 |
| RC0805JR-07300RL | YAGEO | 300 | ±5% | 0.125 | 0805 | ±100 | -55 to 155 | Moisture Resistant | ROHS3 | 1 |
| AC0805FR-07300RL | YAGEO | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200, Moisture Resistant | ROHS3 | 1 |
| CR0805-FX-3000ELF | Bourns Inc. | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Moisture Resistant | ROHS3 | 1 |
| ERJ-6ENF3000V | Panasonic Electronic Components | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200 | ROHS3 | 1 |
| KTR10EZPF3000 | Rohm Semiconductor | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200, High Voltage | ROHS3 | 1 |
| RC0805FR-07300RL | YAGEO | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Moisture Resistant | ROHS3 | 1 |
| RMCF0805FT300R | Stackpole Electronics Inc | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200 | ROHS3 | 1 |
| AC0805JR-07300RL | YAGEO | 300 | ±5% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200, Moisture Resistant | ROHS3 | 1 |
| CRCW0805300RFKEA | Vishay Dale | 300 | ±1% | 0.125 | 0805 | ±100 | -55 to 155 | Automotive AEC-Q200 | ROHS3 | 1 |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): RC0805JR-07300RL from YAGEO serves as a direct equivalent with matching ±5% tolerance, identical electrical performance, and equivalent mechanical form factor. This part maintains all compliance certifications (ROHS3, MSL 1) and operates within the same temperature range.
For Tolerance Upgrade (±1% Tolerance): RC2012F301CS from Samsung Electro-Mechanics provides an upgrade path within the same manufacturer series, offering tighter tolerance specification while preserving all other electrical and mechanical characteristics. Alternative ±1% tolerance upgrades include RC0805FR-07300RL (YAGEO), CR0805-FX-3000ELF (Bourns), and RMCF0805FT300R (Stackpole Electronics).
For Automotive Applications (AEC-Q200 Qualified): AC0805FR-07300RL (YAGEO), ERJ-6ENF3000V (Panasonic), KTR10EZPF3000 (Rohm), RMCF0805FT300R (Stackpole), and CRCW0805300RFKEA (Vishay Dale) all carry AEC-Q200 automotive qualification. These parts are suitable for automotive-grade circuit applications requiring enhanced reliability standards.
For High Voltage Applications: KTR10EZPF3000 from Rohm Semiconductor includes high voltage capability in addition to AEC-Q200 qualification and ±1% tolerance.
All substitute parts maintain ROHS3 compliance, MSL 1 rating, and -55°C to 155°C operating temperature range. Selection should be based on application requirements for tolerance grade, automotive qualification status, and packaging format (Tape & Reel versus Cut Tape availability).
Frequently Asked Questions (FAQ)
Q: Can RC0805JR-07300RL replace RC2012J301CS in all applications?
A: RC0805JR-07300RL is a direct equivalent with identical electrical specifications (300 Ohms, ±5% tolerance, 0.125W) and mechanical compatibility (0805 package, 2 terminations). Both parts share the same operating temperature range (-55°C to 155°C), temperature coefficient (±100ppm/°C), and compliance certifications (ROHS3, MSL 1). Direct substitution is valid for applications where ±5% tolerance is specified.
Q: What is the difference between ±5% and ±1% tolerance parts?
A: Tolerance specification defines the acceptable resistance value deviation from the nominal 300 Ohm rating. RC2012J301CS with ±5% tolerance allows resistance values between 285 and 315 Ohms. Upgrade parts with ±1% tolerance (RC2012F301CS, RC0805FR-07300RL, CR0805-FX-3000ELF, ERJ-6ENF3000V, KTR10EZPF3000, RMCF0805FT300R, CRCW0805300RFKEA) restrict values between 297 and 303 Ohms. ±1% parts are suitable for applications requiring tighter resistance control and improved circuit performance stability.
Q: Are AEC-Q200 qualified parts interchangeable with non-automotive parts?
A: AEC-Q200 qualified parts (AC0805FR-07300RL, ERJ-6ENF3000V, KTR10EZPF3000, RMCF0805FT300R, CRCW0805300RFKEA, AC0805JR-07300RL) meet enhanced automotive reliability standards and are suitable for both automotive and general industrial applications. Non-automotive parts can be used in automotive circuits only if the application does not require AEC-Q200 qualification. Substituting a non-qualified part into an automotive-qualified design may violate design specifications.
Q: What packaging formats are available?
A: RC2012J301CS is supplied in Tape & Reel (TR) format. Equivalent parts are available in multiple packaging options: Tape & Reel (TR), Cut Tape (CT), or Cut Tape & Digi-Reel® combinations. Packaging selection depends on manufacturing process requirements (automated pick-and-place equipment compatibility) and order quantity. Verify packaging compatibility with assembly equipment before substitution.
Q: Can I use a higher power-rated resistor as a substitute?
A: All substitute parts listed maintain the 0.125W (1/8W) power rating specified for RC2012J301CS. Power rating defines maximum continuous power dissipation capability. Using a higher power-rated component in the same 0805 package is not applicable, as package size constrains power dissipation capacity. If higher power dissipation is required, a larger package format (1206, 1210, or higher) must be selected.
Q: What is the significance of Moisture Sensitivity Level (MSL)?
A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and does not require special handling, storage, or baking procedures prior to soldering. All listed substitute parts carry MSL 1 rating, ensuring equivalent moisture handling requirements and eliminating special storage or preparation procedures.
Q: Are there inventory considerations for substitute selection?
A: Current inventory levels vary by part number. RC0805JR-07300RL (YAGEO) has the highest inventory at 151,314 pieces. CRCW0805300RFKEA (Vishay Dale) has 42,855 pieces. For high-volume production requirements, parts with larger inventory positions reduce lead time risk. Inventory status should be verified at time of procurement, as levels change continuously.
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