Bobbins (Coil Formers), Mounts, Hardware

Part Number	Description / PDF	Quantity
B65844N1110T002 TDK EPCOS	BOBBIN COIL FORMER EP 13	0
B65842S2000X000 TDK EPCOS	MOUNTING ASSEMBLY EP 10	1373
B65806N1108D001 TDK EPCOS	COIL FORMER RM5 SUMIKON PM 9630	436
B66243S1012T001 TDK EPCOS	BOBBIN COIL FORMER E 42X21X20	0
B66301C2000X000 TDK EPCOS	PLASTIC COVER CAP E 6.3	0
B65514A2000X000 TDK EPCOS	TERMINAL CARRIER ER	0
B65524C1008T001 TDK EPCOS	BOBBIN COIL FORMER P 9 X 5	0
B65842W1008D002 TDK EPCOS	BOBBIN COIL FORMER EP 10	0
B66242J1000R001 TDK EPCOS	BOBBIN COIL FORMER E 42X21X15	155
B65820W1005D001 TDK EPCOS	COIL FORMER RM7 SUMIKON PM 9630	0
B66301B1006T002 TDK EPCOS	BOBBIN COIL FORMER E 6.3	0
B66302A2000X000 TDK EPCOS	PLASTIC COVER CAP E 8.8	7073
B65822F1008T002X TDK EPCOS	BOBBIN COIL FORMER RM 5	345
B65808N1004D002 TDK EPCOS	BOBBIN COIL FORMER RM 6	708
B66424X1012D001 TDK EPCOS	COIL FORMER EFD30 SUMIKON PM 963	0
B65806N1105D001 TDK EPCOS	COIL FORMER RM5 SUMIKON PM 9630	336
B65820D2005X000 TDK EPCOS	INSULATING WASHER RM7 MAKROFOL F	1658
B65804B6010T002 TDK EPCOS	BOBBIN COIL FORMER RM 4	1640
B65840N1106T001 TDK EPCOS	BOBBIN COIL FORMER EP 7	0
B65808N1108D002 TDK EPCOS	COIL FORMER RM6 SUMIKON PM 9630	489

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.