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RC2012J4R7CS Equivalent & Substitute Parts Reference
Part Overview
The RC2012J4R7CS is a 4.7 Ohm ±5% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 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 RC2012J4R7CS is supplied in Cut Tape (CT) packaging with 876 pieces currently in stock.
Equivalent and substitute parts are identified when designs require alternative sourcing due to supply constraints, procurement lead times, or specific application requirements such as automotive qualification or enhanced tolerance specifications. Substitute parts maintain electrical compatibility through identical resistance value, package dimensions, and operating temperature range while potentially offering improvements in tolerance, power rating, or industry certifications.
Substiute Parts
Key Parameters
| Parameter | RC2012J4R7CS |
|---|---|
| Resistance Value | 4.7 Ohms |
| Tolerance | ±5% |
| Power Rating | 0.125W (1/8W) |
| Package / Case | 0805 (2012 Metric) |
| Composition | Thick Film |
| Operating Temperature Range | -55°C to 155°C |
| Temperature Coefficient | ±300ppm/°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Number of Terminations | 2 |
Substitute Part Grouping Explanation
Substitute parts for the RC2012J4R7CS are grouped based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the following core parameters identical to the main part:
Mandatory Matching Parameters:
- Resistance Value: 4.7 Ohms
- Package / Case: 0805 (2012 Metric)
- Operating Temperature Range: -55°C to 155°C
- Composition: Thick Film
- Number of Terminations: 2
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Allowable Variation Parameters:
- Tolerance: May be ±1% (tighter tolerance) or ±5% (matching tolerance)
- Power Rating: May be 0.125W (1/8W) or 0.333W (1/3W) — higher power ratings provide additional thermal margin
- Temperature Coefficient: May vary (±100ppm/°C to ±300ppm/°C) — tighter coefficients indicate superior stability
- Packaging Format: May be Cut Tape (CT), Tape & Reel (TR), or Digi-Reel® — all are compatible with standard assembly processes
- Automotive Certification: AEC-Q200 qualification is an optional enhancement for automotive applications
Substitutes are organized by manufacturer and tolerance specification to facilitate direct part selection based on application requirements and supply availability.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power Rating | Temp Coeff | Package | AEC-Q200 | Packaging Type | Stock (Pcs) |
|---|---|---|---|---|---|---|---|---|---|
| RC2012J4R7CS | Samsung Electro-Mechanics | 4.7 Ω | ±5% | 0.125W | ±300ppm/°C | 0805 | No | Cut Tape (CT) | 876 |
| RC2012F4R7CS | Samsung Electro-Mechanics | 4.7 Ω | ±1% | 0.125W | ±300ppm/°C | 0805 | No | Tape & Reel (TR) | 40721 |
| ERJ-6BQF4R7V | Panasonic Electronic Components | 4.7 Ω | ±1% | 0.333W | ±200ppm/°C | 0805 | Yes | Tape & Reel (TR) | 9161 |
| ERJ-6RQF4R7V | Panasonic Electronic Components | 4.7 Ω | ±1% | 0.125W | ±200ppm/°C | 0805 | Yes | Tape & Reel (TR) | 3289 |
| ERJ-6RQJ4R7V | Panasonic Electronic Components | 4.7 Ω | ±5% | 0.125W | ±200ppm/°C | 0805 | Yes | Tape & Reel (TR) | 23884 |
| KTR10EZPF4R70 | Rohm Semiconductor | 4.7 Ω | ±1% | 0.125W | ±100ppm/°C | 0805 | Yes | Tape & Reel (TR) | 9109 |
| RC0805FR-074R7L | YAGEO | 4.7 Ω | ±1% | 0.125W | ±200ppm/°C | 0805 | No | Cut Tape (CT) & Digi-Reel® | 2400 |
| RC0805JR-074R7L | YAGEO | 4.7 Ω | ±5% | 0.125W | ±200ppm/°C | 0805 | No | Cut Tape (CT) & Digi-Reel® | 286358 |
| RMCF0805FT4R70 | Stackpole Electronics Inc | 4.7 Ω | ±1% | 0.125W | ±200ppm/°C | 0805 | Yes | Tape & Reel (TR) | 42427 |
| RMCF0805JT4R70 | Stackpole Electronics Inc | 4.7 Ω | ±5% | 0.125W | ±200ppm/°C | 0805 | Yes | Tape & Reel (TR) | 507899 |
Engineering Selection Recommendations
For Standard Commercial Applications (Non-Automotive):
RC2012F4R7CS (Samsung Electro-Mechanics) provides direct substitution with improved tolerance specification (±1% versus ±5%) while maintaining identical power rating and package format. This part offers significantly higher stock availability (40,721 pieces) compared to the main part.
RC0805JR-074R7L (YAGEO) maintains the original ±5% tolerance specification and offers the highest stock availability (286,358 pieces) among all substitute options. This part is suitable for applications where tolerance matching is critical and supply continuity is prioritized.
RC0805FR-074R7L (YAGEO) provides ±1% tolerance specification with moderate stock levels (2,400 pieces) for applications requiring improved accuracy.
For Automotive Applications (AEC-Q200 Qualified):
ERJ-6RQJ4R7V (Panasonic Electronic Components) matches the original ±5% tolerance and 0.125W power rating while providing AEC-Q200 automotive qualification. Stock availability is 23,884 pieces.
RMCF0805JT4R70 (Stackpole Electronics Inc) provides AEC-Q200 qualification with ±5% tolerance and highest automotive-qualified stock availability (507,899 pieces).
RMCF0805FT4R70 (Stackpole Electronics Inc) offers AEC-Q200 qualification with improved ±1% tolerance and 42,427 pieces in stock.
ERJ-6RQF4R7V (Panasonic Electronic Components) combines AEC-Q200 qualification with ±1% tolerance and superior temperature coefficient (±200ppm/°C) for applications requiring enhanced stability.
For High-Precision Applications:
KTR10EZPF4R70 (Rohm Semiconductor) provides the tightest temperature coefficient specification (±100ppm/°C) with AEC-Q200 qualification, ±1% tolerance, and 0.125W power rating. This part is suitable for precision current-sensing and measurement applications.
For Thermal Margin Enhancement:
ERJ-6BQF4R7V (Panasonic Electronic Components) provides increased power rating (0.333W versus 0.125W) with AEC-Q200 qualification and ±1% tolerance. This part is selected when thermal derating or higher current-handling capability is required within the same package footprint.
Frequently Asked Questions (FAQ)
Q: Can RC2012J4R7CS be directly replaced with RC2012F4R7CS?
A: Yes. Both parts are manufactured by Samsung Electro-Mechanics with identical 4.7 Ohm resistance, 0.125W power rating, 0805 package, and operating temperature range (-55°C to 155°C). The primary difference is tolerance specification: RC2012F4R7CS provides ±1% tolerance compared to ±5% in the original part. This represents an upgrade in accuracy with no compatibility issues.
Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?
A: Both packaging formats contain identical electronic components. Cut Tape (CT) is supplied in smaller quantities suitable for manual assembly or small production runs. Tape & Reel (TR) is supplied on continuous reels optimized for automated pick-and-place assembly equipment. Selection depends on assembly process requirements, not electrical performance.
Q: Are AEC-Q200 qualified parts compatible with non-automotive applications?
A: Yes. AEC-Q200 qualification indicates the part meets automotive industry reliability and testing standards. Parts with this certification are fully compatible with commercial applications and provide equivalent or superior performance. AEC-Q200 qualified parts may be used as direct substitutes in any application where the original part is specified.
Q: Can I substitute a 0.333W (1/3W) rated resistor for a 0.125W (1/8W) rated resistor?
A: Yes. The ERJ-6BQF4R7V provides 0.333W power rating in the same 0805 package footprint. Higher power rating indicates greater thermal capacity and is electrically compatible. This substitution is appropriate when circuit design requires additional thermal margin or when operating conditions approach the original part's power dissipation limit.
Q: What does temperature coefficient (ppm/°C) indicate?
A: Temperature coefficient specifies the fractional change in resistance per degree Celsius of temperature change. Lower values (±100ppm/°C) indicate superior stability across temperature extremes. For example, KTR10EZPF4R70 with ±100ppm/°C provides tighter resistance tolerance maintenance across the full -55°C to 155°C operating range compared to parts with ±300ppm/°C specification.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching the environmental and regulatory status of the original RC2012J4R7CS.
Q: Which substitute part offers the best stock availability?
A: RC0805JR-074R7L (YAGEO) provides the highest stock availability with 286,358 pieces. For automotive-qualified alternatives, RMCF0805JT4R70 (Stackpole Electronics Inc) offers 507,899 pieces in stock.
Q: Can tolerance be downgraded from ±1% to ±5% in a substitute part?
A: Tolerance downgrade is not recommended as a substitution strategy. If the original design specifies ±5% tolerance, substitute parts with ±1% tolerance provide improved accuracy without compatibility issues. Conversely, if design requirements specify ±1% tolerance, only substitute parts with ±1% or tighter tolerance are acceptable.
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