744774122 Würth Elektronik Inductor (Other) In Stock
Würth Elektronik 744774122 is a 22µH ferrite-core power inductor in 2320 SMD package with 0.18Ω DC resistance for efficient energy storage in switching power supply designs. It delivers low-loss inductor performance suitable for DC-DC converter output filtering and general-purpose power choke applications. Available RoHS compliant with worldwide distribution.
- Manufacturer
- Würth Elektronik
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- 744774122 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
- 22µH inductance with only 0.18Ω DC winding resistance for high-efficiency power inductor performance in DC-DC converters
- Ferrite core construction in 2320 SMD package providing stable inductance under DC bias in switching power supply output filters
- General-purpose power inductor rated for continuous current applications in buck, boost, and SEPIC converter topologies
- RoHS compliant (JESD-609 e1) lead-free construction suitable for consumer, industrial, and commercial power supply designs
Applications
Würth Elektronik 744774122 is used as the output filter inductor in step-down (buck) and step-up (boost) DC-DC converters operating at switching frequencies from 50kHz to 500kHz, where 22µH inductance limits output current ripple to acceptable levels. It is also applied in power factor correction chokes, EMI filter networks, and battery charger inductors in portable electronics and industrial power modules. The low 0.18Ω DCR minimizes conduction losses at rated current, improving overall converter efficiency in battery-powered and mains-powered equipment.
Specifications
| YTEOL | 15 |
| Case/Size Code | 2320 |
| Construction | Rectangular |
| Core Material | FERRITE |
| DC Resistance | 0.18Ω |
| Inductance-Nom (L) | 22 µH |
| Inductor Application | POWER INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| JESD-609 Code | e1 |
| Number of Functions | 1 |
| Package Height | 4.5mm |
| Package Length | 5.8mm |
| Package Style | SMT |
| Package Width | 5.2mm |
| Packing Method | TR, Embossed Plastic, 13 Inch |
| Rated Current-Max | 1.28A |
| Self Resonance Frequency | 16MHz |
| Shape/Size Description | RECTANGULAR PACKAGE |
| Shielded | NO |
| Surface Mount | YES |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | ONE SURFACE |
| Test Frequency | 0.01MHz |
| Tolerance | 20% |
| 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
What inductance value and DC resistance does the 744774122 provide for DC-DC converter filter design?
The 744774122 offers 22µH nominal inductance and 0.18Ω DC resistance, parameters that together determine output ripple current and conduction loss in a switching regulator. In a 5V to 3.3V buck converter switching at 300kHz, a 22µH inductor limits peak-to-peak ripple current to approximately 0.25A × (Vin-Vout)/Vin, while the 0.18Ω DCR contributes only about 0.072W of conduction loss at 400mA average current.
What package size is 744774122 and how does the 2320 footprint affect PCB layout for a compact power module?
The 744774122 uses a 2320 SMD case code, corresponding to a 6.0mm × 5.0mm rectangular footprint. This mid-size SMT footprint balances inductor volume — needed for 22µH at power current levels — against PCB area, allowing compact power module designs where a smaller 2010 or 1210 package would saturate at lower currents. The 2320 pads are solderable with standard SMT reflow and do not require special stencil apertures.
In which switching converter topologies is the Würth 744774122 22µH inductor most commonly used?
744774122 is most commonly used as the energy storage element in buck (step-down) converters, boost (step-up) converters, and SEPIC topologies operating at switching frequencies between 100kHz and 400kHz. At 300kHz, a 22µH inductor operating in continuous conduction mode maintains an inductor current ripple below 30% of rated current for output currents up to approximately 1A, which covers a wide range of point-of-load regulator applications in embedded computing and sensor power rails.
Does 744774122 meet RoHS compliance requirements and what is its typical availability for production orders?
Yes, 744774122 carries JESD-609 code e1 indicating lead-free halogen-free construction, meeting RoHS Directive 2011/65/EU and REACH requirements for European and global market deployment. Würth Elektronik inductors in the 744774xxx series are typically stocked by major distributors with YTEOL of 15 years, and production quantities are generally available from stock or with short lead times from authorized distribution channels worldwide.
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