Terminal Blocks - Wire to Board

Part Number	Description / PDF	Quantity
32.4452 Altech Corporation	PUSHIN PCB TERM 2P 2.54MM 6A GRY	400
30.653 Altech Corporation	TERM BLOCK 3POS 45DEG 5.08MM PCB	961600
MVE-253 Altech Corporation	PCB TERM 5MMPS 3PVERT15A300VGRN	90700
32.5303 Altech Corporation	PUSHIN PCB TERM 3P 2.5MM 2A GRY	400
30.203 Altech Corporation	TERM BLK PCB FNT 3P 58MM 20A GRY	275200
30.652 Altech Corporation	TERM BLOCK 45DEG 2P 58MM 15A GRY	9841200
32.4402 Altech Corporation	PUSHIN PCB TERM 2P 2.54MM 6A GRY	400
32.4404 Altech Corporation	PUSHIN PCB TERM 4P 2.54MM 6A GRY	400
30.703 Altech Corporation	TERM BLOCK FNT 3P 5MM 20A GRY	700
MV-468 Altech Corporation	TERM BLK 8P SIDE ENT 6.35MM PCB	1761950
29.008 Altech Corporation	TERM BLK 8POS SIDE ENT 3.5MM PCB	192720
32.5353 Altech Corporation	PUSHIN PCB TERM 3P 2.5MM 2A GRY	400
32.5302 Altech Corporation	PUSHIN PCB TERM 2P 2.5MM 2A GRY	400
30.655 Altech Corporation	TERM BLOCK 45DEG 5P 58MM 15A GRY	2502600
MVEB-156 Altech Corporation	PCB TERM 10MMPS 6P VERT 10A 600V	0
34.411 Altech Corporation	TERM BLOCK PCB FNT 11P 100MM 20A	0
MI-2713 Altech Corporation	PCB TERM 75MMPS 35 DEG 13P 15A 3	0
30.853 Altech Corporation	TERM BLOCK FNT 3P 58MM 20A GRN	400
30.204 Altech Corporation	TERM BLK PCB FNT 4P 58MM 20A GRY	50
MVE-2712 Altech Corporation	PCB TERM 75MMPS 12PVERT15A300VGR	0

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+)