Fixed Inductors

Part Number	Description / PDF	Quantity
36501J1N6JTDG TE Connectivity AMP Connectors	FIXED IND 1.6NH 700MA 40 MOHM	2227
1-2176075-9 TE Connectivity AMP Connectors	FIXED IND 1.9NH 200MA 550 MOHM	0
36401E2N2ATDF TE Connectivity AMP Connectors	FIXED IND 2.2NH 440MA 350 MOHM	0
3632B682LL TE Connectivity AMP Connectors	FIXED IND 6.8MH 100MA 16.5 OHM	0
36502A82NJTDG TE Connectivity AMP Connectors	FIXED IND 82NH 400MA 420 MOHM	3
36401E1N7ATDF TE Connectivity AMP Connectors	FIXED IND 1.7NH 560MA 250 MOHM	2000
36401E1N3ATDF TE Connectivity AMP Connectors	FIXED IND 1.3NH 700MA 250 MOHM	2000
3631B330LL TE Connectivity AMP Connectors	FIXED IND 33UH 1.9A 90 MOHM SMD	995
2-2176075-4 TE Connectivity AMP Connectors	FIXED IND 2.4NH 150MA 800 MOHM	592
36501J82NJTDG TE Connectivity AMP Connectors	FIXED IND 82NH 400MA 540 MOHM	3949
3-2176075-9 TE Connectivity AMP Connectors	FIXED IND 3.9NH 150MA 1.2 OHM	445
36501JR39JTDG TE Connectivity AMP Connectors	FIXED IND 390NH 100MA 4.35 OHM	8
36401E22NGTDF TE Connectivity AMP Connectors	FIXED IND 22NH 90MA 2.65 OHM SMD	0
36502A47NJTDG TE Connectivity AMP Connectors	FIXED IND 47NH 500MA 310 MOHM	1923
4-2176075-7 TE Connectivity AMP Connectors	FIXED IND 7.4NH SMD	439
36401E1N5BTDF TE Connectivity AMP Connectors	FIXED IND 1.5NH 700MA 250 MOHM	0
36401E1N6ATDF TE Connectivity AMP Connectors	FIXED IND 1.6NH 560MA 250 MOHM	0
36401E2N7ATDF TE Connectivity AMP Connectors	FIXED IND 2.7NH 440MA 350 MOHM	2000
3632B472LL TE Connectivity AMP Connectors	FIXED IND 4.7MH 120MA 12 OHM SMD	0
36401E1N1ATDF TE Connectivity AMP Connectors	FIXED IND 1.1NH 700MA 150 MOHM	250

Fixed Inductors

1. Overview

Fixed inductors are passive electronic components designed to store energy in magnetic fields when electrical current flows through them. Unlike variable inductors, their inductance values remain constant during operation. These components play critical roles in filtering, signal processing, energy storage, and electromagnetic interference (EMI) suppression across modern electronics, including power supplies, communication systems, and automotive electronics.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Wirewound Inductors	High precision, high current handling, low resistance	Power supplies, DC-DC converters
Chip Inductors	Compact SMD package, stable performance at high frequencies	Mobile devices, RF circuits
Ferrite Bead Inductors	Effective high-frequency noise suppression	EMI filtering in digital circuits
Thin-Film Inductors	Ultra-compact, high Q-factor, tight tolerance	5G communication modules, IoT devices

3. Structure and Composition

Typical fixed inductors consist of:

Magnetic Core: Made from ferrite, powdered iron, or composite materials to concentrate magnetic flux
Coil Structure: Copper wire wound around the core (enamelled or silver-plated)
Encapsulation: Molded resin or ceramic coating for mechanical protection and insulation
Terminations: Solder-coated ends for PCB mounting (for SMD types) or leaded connections

4. Key Technical Specifications

Parameter	Description	Importance
Inductance (L)	Measured in henrys (H), determines energy storage capacity	Defines filtering/energy storage performance
Rated Current (I_rated)	Maximum DC current before saturation	Prevents core saturation and failure
DC Resistance (DCR)	Resistance of coil windings	Affects efficiency and thermal performance
Self-Resonant Frequency (SRF)	Frequency where inductor behaves as capacitor	Limits effective operating frequency range
Q Factor	Quality factor indicating efficiency	Higher Q = lower energy losses

5. Application Fields

Consumer Electronics: Smartphones, laptops, LED drivers
Industrial Equipment: Motor drives, power inverters
Automotive Systems: ECU modules, EV battery management
Telecom Infrastructure: Base station filters, optical transceivers

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Murata	LQH3NPN100M	10 H, 1.2A, 1.8 1.4mm chip inductor
TDK	MLZ2012A100T	100MHz SRF, 1.0 1.25mm for RF circuits
Vishay	IHLP2525CZER1R0M	1 H, 12A, composite construction
Coilcraft	0402DC-103J	10 H, 5% tolerance, ultra-low profile

7. Selection Guidelines

Key considerations during selection:

Calculate required inductance based on switching frequency and ripple current
Verify rated current exceeds maximum operating current by 20-30%
Select SRF higher than circuit operating frequency
Consider package size vs. thermal dissipation requirements
For EMI suppression: Choose ferrite beads with impedance curves matching target frequencies

8. Industry Trends

Current development trends include:

Miniaturization: Sub-0.5mm size inductors for wearable devices
High-Frequency Operation: Components supporting >10GHz 5G applications
Integrated Solutions: Combined inductor-filter modules
Material Innovation: Nanocrystalline cores for higher saturation flux
Automotive Focus: AEC-Q qualified parts for EV/HEV systems