Bobbins (Coil Formers), Mounts, Hardware

Part Number	Description / PDF	Quantity
9677352508 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	56
9677001015 Fair-Rite Products Corp.	77 BOBBIN GROUND	396
9677001165 Fair-Rite Products Corp.	77 BOBBIN GROUND	12614
9643001165 Fair-Rite Products Corp.	43 BOBBIN GROUND	4115
9677182009 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	356
9677182209 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	469
9677282509 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	186
9677182208 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	326
9677142009 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	1418
9677142008 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	454
9677353508 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	68
9677353509 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	71
9877000104 Fair-Rite Products Corp.	77 BOBBIN RECTANGULAR	1090
9677282008 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	0
9643001015 Fair-Rite Products Corp.	43 BOBBIN GROUND	0
9677242409 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	0
9677242009 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY	0
9677242008 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	0
9677182008 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	0
9677282508 Fair-Rite Products Corp.	77 BOBBIN 3PC. ASSEMBLY COATED	0

Bobbins (Coil Formers), Mounts, Hardware

1. Overview

Bobbins (coil formers), mounts, and hardware are critical mechanical components in magnetic devices. Bobbins serve as structural supports for wound coils in transformers and inductors, while mounts/hardware ensure mechanical stability and electrical connectivity. These components enable precise winding alignment, thermal management, and electromagnetic interference (EMI) control, playing a vital role in power electronics, automotive systems, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Transformer Bobbins	Provide winding support with insulation barriers	Switch-mode power supplies (SMPS), AC/DC converters
Inductor Coil Formers	Enable precise winding geometry for inductance control	DC/DC converters, EMI filters
PCB Mounts	Secure components to printed circuit boards	Telecom equipment, automotive ECUs
Core Clamps	Mechanical fixation for ferrite/powder cores	High-frequency transformers, PFC circuits

3. Structure and Composition

Typical bobbin structures include:

Central core with winding windows
Insulation barriers (e.g., UL-certified materials)
Termination options: PCB pins, wire terminals
Thermal vias for heat dissipation

Mounts/hardware feature:

Anti-vibration rubber
Corrosion-resistant platings (nickel, zinc)
Adjustable positioning brackets

4. Key Technical Specifications

Parameter	Importance
Temperature Resistance (130-200 C)	Determines thermal stability and lifespan
Dielectric Strength (>2kV)	Ensures safety isolation between windings
Dimensional Tolerance ( 0.05mm)	Impacts winding machine compatibility
Tensile Strength (>50MPa)	Prevents mechanical deformation under load
Surface Resistivity (10^12 )	Prevents leakage current paths

5. Application Fields

Power Electronics: 5G base station PSUs, solar inverters
Automotive: On-board chargers (OBC), 48V DC/DC converters
Industrial: CNC machine power supplies, motor drives
Consumer: Fast chargers, LED drivers

6. Leading Manufacturers

Manufacturer	Representative Products
TDK-Lambda	Compact PCB-mount bobbin series for telecom
Sumec Corporation	High-temp composite coil formers
Eaton Electronics	Vibration-resistant inductor mounts
Fastron IC	Customizable toroidal core hardware kits

7. Selection Guidelines

Key considerations:

Material compatibility with expected operating temperatures
Dimensional matching to core geometries (ETD, PQ, RM types)
Vibration resistance for automotive applications
RoHS compliance for environmental regulations
Cost optimization through standard vs. customized designs

Case Study: Electric vehicle chargers use high-temperature bobbins (UL 1557 recognized) to withstand 150 C continuous operation.

8. Industry Trends

Emerging developments include:

Miniaturization through liquid crystal polymer (LCP) materials
Integrated cooling channels in bobbin designs
Smart mounts with embedded temperature sensors
Increased adoption of 3D-printed custom hardware

Market drivers: Electrification of transportation, 5G infrastructure deployment, and energy-efficient appliance standards.