744741221 Würth Elektronik Inductor (Other) In Stock
Würth Elektronik 744741221 is a 220 µH radial-leaded RF inductor with a nickel-zinc cylindrical core and 1.5 Ω DC resistance, designed for general-purpose and RF filtering applications. Its 5 mm lead spacing and 0.65 mm lead diameter suit standard through-hole PCB assembly for oscillator tank circuits and EMI filters. Available in bulk packaging with global distribution and long product lifecycle.
- Manufacturer
- Würth Elektronik
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- 744741221 Datasheet PDF
- Category
- Inductor
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 220 µH nickel-zinc core RF inductor optimized for general-purpose and RF frequency filtering
- Cylindrical radial package with 5 mm lead spacing for standard through-hole PCB mounting
- 1.5 Ω DC resistance providing effective impedance in tank and LC filter circuits
- 0.65 mm lead diameter ensuring robust solder joint strength in vibration-prone assemblies
- Long product lifecycle (YTEOL 15 years) for stable supply chain in long-running designs
Applications
The Würth Elektronik 744741221 serves as an RF choke and tank inductor in AM/FM radio receivers, oscillator circuits, and EMI suppression filters operating in the low-to-mid RF frequency range. Its 220 µH inductance and nickel-zinc core are well matched for impedance matching networks, low-pass LC filters, and resonant tank circuits in the 100 kHz to 10 MHz frequency band. The through-hole radial format suits prototyping, small-volume production, and repair applications where SMT inductors are not preferred.
Specifications
| YTEOL | 15 |
| Construction | Cylindrical |
| Core Material | NICKEL-ZINC |
| DC Resistance | 1.5Ω |
| Inductance-Nom (L) | 220 µH |
| Inductor Application | RF INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| Lead Diameter | 0.65mm |
| Lead Length | 5mm |
| Lead Spacing | 5mm |
| Number of Functions | 1 |
| Package Diameter | 7.8mm |
| Package Length | 5.5mm |
| Package Style | Radial |
| Packing Method | Tray |
| Rated Current-Max | 0.66A |
| Self Resonance Frequency | 5MHz |
| Shape/Size Description | CYLINDRICAL PACKAGE |
| Shielded | NO |
| Special Feature | INDUCTANCE IS MEASURED AT 5 MILLI AMPERE |
| Surface Mount | NO |
| Terminal Placement | RADIAL |
| Terminal Shape | WIRE |
| Test Frequency | 0.1MHz |
| Tolerance | 10% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8504.50.80.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what frequency range does the 744741221 perform best as an RF choke or tank inductor?
The 744741221 with 220 µH inductance and nickel-zinc ferrite core is optimized for the 100 kHz to 10 MHz frequency band. Below 100 kHz the 1.5 Ω DC resistance becomes relatively significant, while above 10 MHz the self-resonant frequency of the cylindrical winding typically limits Q factor. This makes it ideal for AM broadcast band (535–1705 kHz) receiver tank circuits and LC low-pass filters with cutoff frequencies in the 1 MHz to 5 MHz range.
How does the nickel-zinc core material of the 744741221 compare to ferrite or iron-powder cores for RF applications?
Nickel-zinc ferrite provides higher resistivity (10 kΩ·cm) than manganese-zinc ferrite, significantly reducing eddy current losses above 1 MHz. Compared to iron-powder cores, nickel-zinc maintains lower core loss up to 10 MHz while offering higher permeability in compact cylindrical geometries. This makes the 744741221 more suitable for RF signal path inductors than iron-powder alternatives, which are better suited to high-current power inductors below 500 kHz.
Is the 744741221 compatible with wave soldering for through-hole PCB assembly?
Yes, the 744741221 is a through-hole radial component with 5 mm lead spacing and 0.65 mm lead diameter, making it fully compatible with standard wave soldering and selective soldering processes using eutectic Sn63/Pb37 or SAC305 lead-free solder alloys. The nickel-zinc ferrite core withstands soldering temperatures up to 260°C peak for 10 seconds per IPC/JEDEC J-STD-020 without degradation of the 220 µH nominal inductance.
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About Würth Elektronik
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