Terminal Blocks - Headers, Plugs and Sockets

Part Number	Description / PDF	Quantity
2342076-2 TE Connectivity AMP Connectors	2POS HDR 90 DEG HT 3.5MM PITCH T	1200
1-1986375-2 TE Connectivity AMP Connectors	TERM BLOCK PLUG 12POS 3.81MM	0
1-796638-0 TE Connectivity AMP Connectors	TERM BLOCK HDR 10POS 5.08MM	878
282828-4 TE Connectivity AMP Connectors	TERM BLOCK HDR 4POS VERT 10.16MM	0
1776134-8 TE Connectivity AMP Connectors	TERM BLOCK HDR 8POS 90DEG 3.5MM	0
1-2342083-3 TE Connectivity AMP Connectors	TERM BLCK HDR 13POS 90DEG 5.08MM	200
2-2342076-3 TE Connectivity AMP Connectors	TERM BLOCK HDR 23POS 90DEG 3.5MM	100
284519-6 TE Connectivity AMP Connectors	TERM BLOCK HDR 6POS VERT 3.81MM	515
796636-5 TE Connectivity AMP Connectors	TERM BLOCK HDR 5POS VERT 5.08MM	5873
2-2342071-4 TE Connectivity AMP Connectors	TERM BLOCK HDR 24POS VERT 3.5MM	99
2350513-2 TE Connectivity AMP Connectors	2POS TB HDR 90 DEG PITCH 5.0 & T	2846
1-2351886-6 TE Connectivity AMP Connectors	16POS TB HDR 180 DEG PITCH 3.5 T	2952
282815-2 TE Connectivity AMP Connectors	TERM BLOCK HDR 2POS 90DEG 5.08MM	0
284516-6 TE Connectivity AMP Connectors	TERM BLOCK HDR 6POS VERT 3.5MM	0
1546122-2 TE Connectivity AMP Connectors	TERM BLOCK PLUG 2POS 5.08MM	0
1986720-7 TE Connectivity AMP Connectors	TERM BLOCK PLUG 7POS STR 3.81MM	0
1546211-4 TE Connectivity AMP Connectors	TERM BLOCK HDR 4POS VERT 5MM	0
796867-3 TE Connectivity AMP Connectors	TERM BLOCK HDR 3POS VERT 5.08MM	4109
796866-8 TE Connectivity AMP Connectors	TERM BLOCK HDR 8POS 90DEG 5.08MM	0
284061-8 TE Connectivity AMP Connectors	TERM BLOCK HDR 16POS 5.08MM	320

Terminal Blocks - Headers, Plugs and Sockets

1. Overview

Terminal blocks, headers, plugs, and sockets are essential components in electrical and electronic systems for establishing reliable connections between circuits. These devices enable signal transmission, power distribution, and system modularity. Their standardized designs ensure interoperability, scalability, and ease of maintenance in complex systems.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Terminal Blocks	Screw/clamp-based connections for high current/ voltage	Industrial control panels, power distribution units
PCB Headers	Pin/grid arrays for board-to-board connections	Embedded systems, Arduino shields
RJ Connectors	Modular jacks for data/telecom signals	Ethernet networks (RJ45), telephone systems (RJ11)
D-Sub Connectors	Multi-pin trapezoidal shells for analog/digital signals	Legacy serial interfaces, industrial sensors
USB Connectors	Hot-pluggable interfaces for power/data	Consumer electronics, peripheral devices

3. Structure and Components

Typical structures include:

Insulating housing (PA66, PBT, or LCP plastics)
Contact elements (phosphor bronze, beryllium copper)
Plating materials (gold, tin, nickel for corrosion resistance)
Actuation mechanisms (screws, spring clamps, or friction fits)
EMI shielding layers (for high-frequency applications)

4. Key Technical Specifications

Parameter	Importance
Current Rating (A)	Determines power handling capacity
Voltage Rating (V)	Defines dielectric strength requirements
Contact Resistance (m )	Impacts signal integrity and power loss
Insertion Loss (dB)	Critical for high-speed data transmission
Mating Cycles	Indicates mechanical durability
Operating Temperature (- C to + C)	Defines environmental tolerance

5. Application Fields

Primary industries include:

Industrial automation (PLCs, HMIs)
Telecommunications (5G base stations, routers)
Consumer electronics (smartphones, wearables)
Medical equipment (imaging devices, patient monitors)
Automotive (EV charging systems, ADAS)

6. Leading Manufacturers and Products

Manufacturer	Representative Product
Phoenix Contact	COMBICON series terminal blocks
TE Connectivity	MICRO MATCH connectors
Molex	SL Series headers
Amphenol	D-Subminiature connectors
Samtec	QTE high-speed socket systems

7. Selection Guidelines

Key considerations:

Electrical requirements (current/voltage levels)
Mechanical constraints (space, vibration)
Environmental factors (temperature, humidity)
Signal integrity needs (frequency, noise rejection)
Cost vs. reliability trade-offs
Compliance with standards (IPC, IEC, UL)

8. Industry Trends

Emerging developments include:

Miniaturization for wearable devices
High-speed connectors for 5G/6G ( 25 Gbps)
Hybrid connectors integrating power/data
Eco-friendly materials (halogen-free, RoHS compliant)
Smart connectors with built-in sensors
Automotive-grade connectors for EVs