Bobbins (Coil Formers), Mounts, Hardware

Part Number	Description / PDF	Quantity
B65808J2204X000 TDK EPCOS	CLAMP RM 6	16861
B66362W1014T001 TDK EPCOS	BOBBIN COIL FORMER ETD 34X17X11	0
B64292A1004X000 TDK EPCOS	HOUSING VERTICAL TOROIDS	1479
B66230A1114T001 TDK EPCOS	BOBBIN COIL FORMER E 32 X 16 X 9	9
B66208W1010T001 TDK EPCOS	BOBBIN COIL FORMER E 25 X 13 X 7	137
B66202B1106T001 TDK EPCOS	BOBBIN COIL FORMER E 13 X 7 X 4	1660
B65812N1012D001 TDK EPCOS	BOBBIN COIL FORMER RM 8	2566
B65846W1008D001 TDK EPCOS	BOBBIN COIL FORMER EP 17	589
B64292A1204X000 TDK EPCOS	HOUSING VERTICAL TOROIDS	438
B65806J2204X000 TDK EPCOS	CLAMP RM 5	1125
B66232J1112T001 TDK EPCOS	BOBBIN COIL FORMER E 30 X 15 X 7	502
B66359W1013T001 TDK EPCOS	BOBBIN COIL FORMER ETD 29X16X10	11
B65816C1512T001 TDK EPCOS	BOBBIN COIL FORMER RM 12	198
B66364B1016T001 TDK EPCOS	BOBBIN COIL FORMER ETD 39X20X13	306
B65814B2203X000 TDK EPCOS	CLAMP RM 10	1334
B65687A2000X000 TDK EPCOS	MOUNTING ASSEMBL PM74/59	24
B66398W1024T001 TDK EPCOS	BOBBIN COIL FORMER ETD 59X31X22	642
B65685A2000X000 TDK EPCOS	MOUNTING ASSEMBLY PM 62 X 49	313
B64291A1504X000 TDK EPCOS	HOUSING HORIZONTAL TOROIDS	93
B65665C0004X000 TDK EPCOS	MOUNTING ASSEMBLY P 22 X 13	739

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.