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RC1608F1243CS Equivalent & Substitute Parts Reference
Part Overview
The RC1608F1243CS is a 124 kOhms ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 0.1W (1/10W) power dissipation in a 0603 (1608 Metric) surface mount package. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and environmental ratings are maintained across alternative manufacturers while preserving functional interchangeability in circuit applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Resistance | 124 | kOhms |
| Tolerance | ±1 | % |
| Power Rating | 0.1 | W (1/10W) |
| Package / Case | 0603 (1608 Metric) | — |
| Composition | Thick Film | — |
| Temperature Coefficient | ±100 | ppm/°C |
| Operating Temperature Range | -55 to 155 | °C |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
| RoHS Status | ROHS3 Compliant | — |
| Number of Terminations | 2 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the RC1608F1243CS is determined by strict equivalence across the following parameters: resistance value (124 kOhms), tolerance (±1%), power rating (0.1W), package type (0603/1608 Metric), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and moisture sensitivity level (MSL 1). All identified substitute parts maintain these core electrical and mechanical specifications. Substitute parts are categorized into two groups: Direct Substitutes (identical specifications and packaging format) and Similar Substitutes (identical electrical specifications with automotive AEC-Q200 qualification or alternative packaging configurations). Dimensional variations within supplier device package tolerances do not preclude substitution when all electrical parameters remain equivalent.
Parameter Comparison
| Manufacturer | Part Number | Resistance (kOhms) | Tolerance (%) | Power (W) | Package | Temp Coeff (ppm/°C) | Op Temp (°C) | MSL | RoHS Status | Packaging Format | AEC-Q200 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Samsung Electro-Mechanics | RC1608F1243CS | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Cut Tape (CT) | — |
| Bourns Inc. | CR0603-FX-1243ELF | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Tape & Reel (TR) | — |
| YAGEO | RC0603FR-07124KL | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Cut Tape (CT) & Digi-Reel® | — |
| YAGEO | AC0603FR-07124KL | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Tape & Reel (TR) | Yes |
| Vishay Dale | CRCW0603124KFKEA | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Cut Tape (CT) & Digi-Reel® | Yes |
| Vishay Dale | CRCW0603124KFKTA | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | RoHS Non-compliant | Tape & Reel (TR) | Yes |
| Panasonic Electronic Components | ERJ-3EKF1243V | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Cut Tape (CT) & Digi-Reel® | Yes |
| Stackpole Electronics Inc | RMCF0603FT124K | 124 | ±1 | 0.1 | 0603 | ±100 | -55 to 155 | 1 | ROHS3 | Tape & Reel (TR) | Yes |
Engineering Selection Recommendations
Direct Substitutes (Identical Specifications and Packaging):
CR0603-FX-1243ELF (Bourns Inc.) and RC0603FR-07124KL (YAGEO) are direct functional equivalents to RC1608F1243CS. Both maintain identical electrical parameters, ROHS3 compliance, and MSL 1 rating. Selection between these options is determined by packaging format preference (Tape & Reel versus Cut Tape & Digi-Reel®) and inventory availability.
Similar Substitutes with AEC-Q200 Automotive Qualification:
AC0603FR-07124KL (YAGEO), CRCW0603124KFKEA (Vishay Dale), ERJ-3EKF1243V (Panasonic Electronic Components), and RMCF0603FT124K (Stackpole Electronics Inc) provide equivalent electrical specifications with additional automotive AEC-Q200 qualification. These parts are suitable for applications requiring automotive-grade reliability standards while maintaining ROHS3 compliance and MSL 1 rating. RMCF0603FT124K offers the highest inventory availability (369,069 pcs) among AEC-Q200 qualified options.
Non-Compliant Alternative:
CRCW0603124KFKTA (Vishay Dale) maintains electrical equivalence and AEC-Q200 qualification but is RoHS non-compliant and REACH Affected. This part is restricted to applications where RoHS exemptions apply or legacy system requirements permit non-compliant components.
Frequently Asked Questions (FAQ)
Q: Can RC0603FR-07124KL replace RC1608F1243CS in all applications?
A: Yes. RC0603FR-07124KL (YAGEO) is a direct substitute maintaining identical resistance (124 kOhms), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), operating range (-55°C to 155°C), and ROHS3 compliance. The only difference is packaging format (Cut Tape & Digi-Reel® versus Cut Tape). Functional interchangeability is complete.
Q: What is the difference between direct substitutes and AEC-Q200 qualified substitutes?
A: Direct substitutes (CR0603-FX-1243ELF, RC0603FR-07124KL) provide identical electrical and mechanical specifications without automotive qualification. AEC-Q200 qualified substitutes (AC0603FR-07124KL, CRCW0603124KFKEA, ERJ-3EKF1243V, RMCF0603FT124K) include automotive-grade reliability testing and qualification. Selection depends on application requirements; automotive applications benefit from AEC-Q200 qualification, while general industrial applications function equivalently with either category.
Q: Does packaging format (Cut Tape versus Tape & Reel) affect electrical performance?
A: No. Packaging format affects only handling, storage, and assembly logistics. Electrical specifications, thermal performance, and reliability characteristics remain identical regardless of packaging format. Selection is based on manufacturing process requirements and inventory management preferences.
Q: Why is CRCW0603124KFKTA listed as RoHS non-compliant?
A: CRCW0603124KFKTA is RoHS non-compliant and REACH Affected, indicating it contains restricted substances. This part is functionally equivalent but restricted to applications where RoHS exemptions apply or legacy system requirements permit non-compliant components. ROHS3 compliant alternatives are preferred for new designs.
Q: Which substitute offers the best inventory availability?
A: RMCF0603FT124K (Stackpole Electronics Inc) provides the highest inventory availability at 369,069 pcs. This part combines AEC-Q200 qualification, ROHS3 compliance, MSL 1 rating, and equivalent electrical specifications with superior stock levels.
Q: Are dimensional variations between substitutes significant?
A: Dimensional variations exist within supplier device package tolerances. For example, CRCW0603124KFKEA dimensions are 0.061" L x 0.033" W versus RC1608F1243CS at 0.063" L x 0.031" W. These variations remain within 0603 package specifications and do not affect PCB layout compatibility or functional performance. Height differences (0.020" to 0.022" seated maximum) are similarly negligible for standard assembly processes.
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