Terminal Blocks - Wire to Board

Part Number	Description / PDF	Quantity
34.105 Altech Corporation	TERM BLOCK PCB FNT 5P 58MM 20A G	50
29.355 Altech Corporation	TERM BLK PCB TOP 7MM NO WP	0
MHEB-259 Altech Corporation	PBC TERM 1000MMPSHORIZ 9P 15A 60	0
35.419 Altech Corporation	TERM BLOCK PCB 19P 5MM 20A HORZ	0
MV-2518 Altech Corporation	PCB TERM 508PIN SPACE 18PVERT15A	0
MHSP-254 Altech Corporation	PCB TERM BLOCK 508MM 4P HORIZ 24	0
MV-2512 Altech Corporation	PCB TERM 508PIN SPACE 12PVERT15A	1200
MV-256 Altech Corporation	PCB TERM 508PIN SPACE 6PVERT15A3	5000
MI-2514 (35) Altech Corporation	PCB TERM 508MMPS 35 DEG 14P 15A	0
MVDK-2524 Altech Corporation	PCB TERMVERTDBL LVL508MMPS 48PNO	0
38.3105 Altech Corporation	PCB TERM SPRING 5 P 5.0MM AK3750	200
MV-498 Altech Corporation	PCB TERM952MMPS 8PVERT25A300VGRN	0
MHE-1623 Altech Corporation	PCB TERM 5MMPIN 23PHORIZ15A250VB	0
30.724 Altech Corporation	TERM BLOCK FNT 24P 5MM 20A GRY	0
MVD-153 (5,00) Altech Corporation	PCB TERM BLOCK DBL DECK5MMPS 6PO	900
MV-272 Altech Corporation	PCB TERM 75MMPS VERT 2P 15A 300V	400
MHS-1523 Altech Corporation	PCB TERM BLOCK 500MMPS 23P HORIZ	0
30.222 Altech Corporation	TERM BLK PCB FNT 22P 58MM 20A GR	0
MVB-255 Altech Corporation	PCB TERM 1016MMPS 5P VERT15A 300	0
30.160 Altech Corporation	TERM BLK PCB TOP 10P 7.5MM 20A G	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+)