Terminal Blocks - Wire to Board

Part Number	Description / PDF	Quantity
TBL005A-500-11GY-2WT CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	180
TBL007A-500-13GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	162
TB006-508-04BE CUI Devices	TERMINAL BLOCK, SCREW TYPE, 5.08	694
TBL004-508-10BE-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.08,	171
TBLH10-500-12BK CUI Devices	TERMINAL BLOCK, SCREWLESS, HIGH	297
TBL004V-508-14BE-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.08,	101
TB009-508-10BE CUI Devices	TERMINAL BLOCK, SCREW TYPE, 5.08	517
TBL004-508-22BE-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.08,	86
TB005-762-02BE CUI Devices	TERMINAL BLOCK, SCREW TYPE, 7.62	1432
TB009-508-09BE CUI Devices	TERMINAL BLOCK, SCREW TYPE, 5.08	846
TBL009V-254-15GY-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 2.54,	132
TB006-508-13BE CUI Devices	TERMINAL BLOCK, SCREW TYPE, 5.08	1078
TBL009V-500-02GY-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	564
TBL007A-500-06GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	328
TBL005A-500-02GY-2WT CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	1236
TBL008V-1000-05BE CUI Devices	TERMINAL BLOCK, SCREWLESS, 10.0,	92
TBL005A-500-22GY-2WT CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	86
TBL004V-508-24BE-2GY CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.08,	0
TBL005A-500-05GY-2WT CUI Devices	TERMINAL BLOCK, SCREWLESS, 5.00,	725
TBLH10V-350-08BK CUI Devices	TERMINAL BLOCK, SCREWLESS, HIGH	430

Terminal Blocks - Wire to Board

1. Overview

Terminal blocks - wire to board are modular, insulated connectors used to securely join wires to printed circuit boards (PCBs). They provide reliable electrical connections while enabling easy maintenance and reconfiguration. These components play a critical role in bridging wired systems with electronic control units, ensuring signal integrity and power transmission in applications ranging from industrial automation to consumer electronics.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Screw Terminal Blocks	Use screws for mechanical clamping force, offering high reliability and vibration resistance	Industrial control panels, HVAC systems
Spring Clamp Terminal Blocks	Utilize spring pressure for quick wire insertion/removal without tools	Smart home devices, test equipment
IDC (Insulation Displacement Connectors)	Cut through wire insulation for rapid termination, eliminating pre-stripping	Telecom equipment, automotive wiring harnesses
Push-in Terminal Blocks	Accept pre-stripped wires with minimal insertion force	Lighting control systems, factory automation
PCB Terminal Blocks	Through-hole or surface-mount designs optimized for board-level integration	Medical devices, embedded systems

3. Structure and Components

A typical wire-to-board terminal block consists of: - Insulating Housing: Made from high-temperature resistant thermoplastics (e.g., PA66, PBT) for dielectric isolation - Conductive Terminals: Brass or phosphor bronze contacts with plating (Sn, Ag, Au) for corrosion resistance - Clamping Mechanism: Screw, spring, or lever-actuated systems for wire fixation - PCB Interface: Male/female contacts or solder tails for board mounting - Retention Features: Polarization keys and mechanical stops to prevent misalignment

4. Key Technical Specifications

Parameter	Importance	Typical Values
Rated Current	Determines maximum continuous operating current capacity	1-30A
Rated Voltage	Defines safe operating voltage range	50-600V
Contact Resistance	Impacts power loss and thermal performance	10m
Insulation Resistance	Ensures electrical safety and signal integrity	100M
Operating Temperature	Determines material stability in working environment	-40 C to +120 C
Wire Gauge Range	Specifies compatible conductor sizes	26-4AWG
Material Glow-Wire Rating	Measures fire resistance per IEC 60335	650-960 C

5. Application Fields

Key industries include: - Industrial Automation: PLCs, motor drives, CNC machines - Consumer Electronics: Home appliances, audio equipment - Renewable Energy: Solar inverters, wind turbine controllers - Medical Equipment: Diagnostic devices, patient monitors - Automotive: EV charging systems, battery management units

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Phoenix Contact	PTSA 1.5/2-H-PE	Spring clamp, 1.5mm wire capacity, push-in PCB interface
TE Connectivity	CXT PCB Terminal Block	Surface-mount design, 3A rating, halogen-free
Weidm ller	SAM 2.5/ 4-GN	Plug-in connectors, vibration-proof, 2.5mm pitch
Molex	PicoBlade 0.8mm	Ultra-compact IDC terminals for fine wires

7. Selection Recommendations

Key considerations: 1. Electrical Requirements: Match current/voltage ratings with system specifications 2. Mechanical Needs: Choose clamping method based on maintenance frequency 3. Environmental Factors: Select materials for temperature/humidity extremes 4. PCB Compatibility: Verify pitch, height, and footprint specifications 5. Total Cost: Balance upfront cost vs. long-term reliability in mission-critical applications

8. Industry Trends

Emerging trends include: - Miniaturization for IoT and wearable devices - High-density connectors supporting 0.4mm pitch - Smart terminal blocks with integrated diagnostics - Increased adoption of press-fit technology - RoHS-compliant materials with improved tracking resistance - Connectors for high-voltage EV systems (800V+)