0402CS-3N3XJRW - 3.3nH 840mA RF Inductor | Coilcraft
MPN: 0402CS-3N3XJRW β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.65 | $0.65 |
| 10 | $0.58 | $5.80 |
| 100 | $0.5 | $50.00 |
| 500 | $0.45 | $225.00 |
| 1,000 | $0.4 | $400.00 |
Drop-in alternatives for 0402CS-3N3XJRW β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
0402CS-3N3XGRW
β Drop-Inπ Reference alternative (not in catalog)
0402CS-3N0XJLW
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
0402CS-3N6XJLW
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
0402CS-2N8XJLW
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
0402CS-22NXJLW
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.08 / Unit
View Datasheet β0402CS-3N3XJRW Maximum Ratings & Electrical Characteristics
| Inductance | 3.3 nH |
| Inductance Tolerance | 5% |
| Current Rating (RMS) | 840 mA |
| DC Resistance (Max) | 66 mOhm |
| Self-Resonant Frequency (Series Max) | up to 12.7 GHz |
| Core Material | Ceramic |
| Construction | Unshielded wirewound |
| Package | 0402 (1005 Metric) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| Quality Standard | AEC-Q200 qualified |
| RoHS Status | Compliant |
| Shielding | Unshielded |
| Type | Fixed RF Inductor |
| Packaging | Tape and Reel (W suffix) |
0402CS-3N3XJRW Pin Configuration
| Pin 1 | Terminal 1 β Inductor electrode 1 |
| Pin 2 | Terminal 2 β Inductor electrode 2 (polarity not applicable) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
0402CS-3N3XJRW is suitable for 6 applications: 2.4/5 GHz RF Matching Networks, RF Bias Chokes for PA/LNA Circuits, Automotive Telematics and Connectivity Modules, VCO and Resonant Tank Circuits, Smartphone and Wearable IoT RF Front Ends, Test and Measurement RF Fixtures.
2.4/5 GHz RF Matching Networks
The 0402CS-3N3XJRW is purpose-built for impedance matching in Wi-Fi, Bluetooth, and Zigbee radios operating at 2.4 GHz and 5 GHz. Its 3.3 nH inductance with 5% tolerance provides a predictable reactance of about 51 ohms at 2.45 GHz and 104 ohms at 5 GHz, while the ceramic core keeps Q high exactly where ferrite inductors collapse. At these frequencies the very high self-resonant frequency (series maximum up to 12.7 GHz) means the part behaves as a near-ideal inductor across both bands, avoiding the resonant shifts that plague cheaper multilayer parts. Place it directly at the antenna feed or PA/LNA matching pad on the 0402 land pattern, keeping pad size minimal so board parasitics do not detune the network.
Recommended
RF Bias Chokes for PA/LNA Circuits
In power amplifier and low-noise amplifier bias feeds, the 0402CS-3N3XJRW acts as an RF choke that passes DC bias while blocking RF signal from leaking into the supply rail. The 840 mA rating and 66 mOhm maximum DCR mean only about 46 mV of drop at full rated current, preserving PA supply headroom and efficiency. Because the ceramic core is non-magnetic, there is no saturation or permeability drift with DC bias, a common failure mode of ferrite chokes in PA output networks. Use it where the RF signal is well below the part's self-resonant point; for deeper rejection, cascade the inductor with an 0402 shunt capacitor forming a simple low-pass bias tee on the supply line.
Recommended
Automotive Telematics and Connectivity Modules
The 0402CS-3N3XJRW is AEC-Q200 qualified and rated from -40C to +125C, which are the two gate requirements for automotive RF assemblies such as telematics units, keyless-entry receivers, and V2X modules. According to Coilcraft, the 0402CS series is explicitly targeted at automotive and other high-temperature applications. In these designs the inductor serves in GNSS LNA matching and antenna tuning circuits where both thermal endurance and stable GHz-range inductance are essential. The ceramic-core construction maintains predictable reactance across the full temperature range, unlike ferrite parts whose permeability shifts with temperature, preserving filter center frequencies from cold crank to underhood ambient conditions.
Recommended
VCO and Resonant Tank Circuits
Voltage-controlled oscillators for wireless transceivers rely on LC tanks whose Q sets phase noise, and the 0402CS-3N3XJRW's ceramic-core wirewound construction delivers the low loss needed at GHz frequencies. The 3.3 nH value suits tank designs in the 1-3 GHz range paired with small varactor capacitances, and the tight 5% tolerance limits tank frequency spread between units. Because the inductor is unshielded, layout discipline matters: orient it perpendicular to adjacent inductors to minimize mutual coupling, or space pads at least one component pitch apart. Always verify the exact SRF of the 3.3 nH value from the Coilcraft datasheet and simulate the tank with the manufacturer's SPICE model before committing the layout.
Recommended
Smartphone and Wearable IoT RF Front Ends
Space-constrained wearable and IoT products need RF passives in the smallest reliable package, and the 0402 (1005 metric) 0402CS-3N3XJRW fills that role with automotive-grade robustness. Its 840 mA rating comfortably covers the DC feed requirements of small coin-cell or LDO-powered radios, while the 66 mOhm DCR keeps insertion loss low, which directly extends battery life in transmit-heavy duty cycles. The part handles both antenna matching and supply-line filtering on the same board, letting designers standardize on one inductor series and reduce BOM complexity. Tape-and-reel packaging supports high-volume SMT placement, and RoHS compliance keeps the finished product aligned with global environmental regulations for consumer electronics.
Recommended
Test and Measurement RF Fixtures
RF test fixtures, bias tees, and evaluation boards benefit from the 0402CS-3N3XJRW's combination of high SRF, low DCR, and well-documented simulation models. In a bias tee, the 3.3 nH inductor series element sets the low-frequency cutoff together with the blocking capacitor, and the ceramic core ensures the insertion-loss curve stays smooth into the multi-GHz region without ferrite loss bumps. Because Coilcraft publishes SPICE models and the part is available in small quantities from DigiKey and Mouser, prototypes can exactly match production hardware. The -40C to +125C rating also means temperature-chamber testing will not push the inductor outside its specified operating envelope during characterization runs.
Recommended
Recommended Products Summary
Engineering reference data for 0402CS-3N3XJRW β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 0402CS-3N3XGRW | 0402CS-3N0XJLW | 0402CS-3N6XJLW | 0402CS-2N8XJLW | 0402CS-22NXJLW |
|---|---|---|---|---|---|---|
| Package | 0402 (1005 Metric) | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same |
| Brand | Coilcraft | Coilcraft | Coilcraft | Coilcraft | Coilcraft | Coilcraft |
| Inductance | 3.3 nH | 3.3 nH | 3.0 nH | 3.6 nH | 2.8 nH | 22 nH |
| Tolerance | 5% | 2% | 5% | 5% | 5% | 5% |
| Current Rating | 840 mA | 840 mA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| DC Resistance (Max) | 66 mOhm | 66 mOhm | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| AEC-Q200 | Qualified | Qualified | Qualified (0402CS series) | Qualified (0402CS series) | Qualified (0402CS series) | Qualified (0402CS series) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Unit Price (Qty 1) | $0.65 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Tight 5% tolerance option within 0402CS 3.3 nH family (vs 0402CS-3N0XJLW)
- Automotive AEC-Q200 qualification with -40C to +125C rating (vs 0402DC series (higher-Q successor))
- Very high self-resonant frequency from ceramic core (vs 0402CS-22NXJLW)
Design Notes
At 3.3 nH the inductor reactance is only about 10 ohms at 500 MHz and 51 ohms at 2.45 GHz, so in low-GHz matching networks board effects dominate. Keep pads to the minimum recommended land pattern, avoid long shared return paths under the part, and remove ground pour directly beneath the component for the highest achievable Q. Use Coilcraft's published SPICE/S-parameter models rather than ideal inductor models in simulation, since parasitic capacitance sets the real self-resonance below the 12.7 GHz series maximum.
Estimated: at the full 840 mA rating across 66 mOhm maximum DCR, dissipation is I^2R = 0.047 W, producing modest self-heating that is well within the -40C to +125C rating. However, in bias-choke positions where DC current flows continuously, verify both the RMS rating and the DC-bias behavior; ceramic cores do not saturate like ferrite, but winding temperature rise should still be budgeted against ambient extremes in automotive enclosures.
Do not rely on the 12.7 GHz self-resonant frequency as if it applied to every value - it is the series maximum. Check the datasheet SRF curve for the specific 3.3 nH value. Also, when substituting nearby values (3.0 nH or 3.6 nH), a 9% inductance change shifts a resonant tank frequency by roughly 4-5%, which can break narrowband filters or crystal-adjacent matching circuits even though the footprint is unchanged.
Compliance Information
RoHS compliance indicated by LCSC/JLCPCB listings. AEC-Q200 (passives) qualification per Coilcraft product page; AEC-Q100 not applicable to passive components. REACH/halogen-free status not stated in provided data.
