Rectangular Connectors - Spring Loaded

Part Number	Description / PDF	Quantity
70ADJ-2-FL0G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 2POS SMD	0
70ADJ-3-ML0G J.W. Miller / Bourns	CONN SPRING MOD MALE 3POS SMD	642
70AAJ-6-F1 J.W. Miller / Bourns	CONN SPRING MOD FEMALE 6POS SMD	0
70AAJ-5-M0 J.W. Miller / Bourns	CONN SPRING MOD MALE 5POS SMD	0
70AAJ-2-F1G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 2POS SMD	0
70AAJ-2-F0 J.W. Miller / Bourns	CONN SPRING MOD FEMALE 2POS SMD	0
70ADJ-3-ML1 J.W. Miller / Bourns	CONN SPRING MOD MALE 3POS SMD	654
70ADJ-4-ML0 J.W. Miller / Bourns	CONN SPRING MOD MALE 4POS SMD	3311
70ADJ-6-FL1G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 6POS SMD	603
70ADJ-4-ML1G J.W. Miller / Bourns	CONN SPRING MOD MALE 4POS SMD	0
70ADJ-5-FL0G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 5POS SMD	0
70AAJ-3-M0G J.W. Miller / Bourns	CONN SPRING MOD MALE 3POS SMD	263
70ADJ-3-FL0G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 3POS SMD	0
70ADJ-4-FL1 J.W. Miller / Bourns	CONN SPRING MOD FEMALE 4POS SMD	35
70AAJ-5-M0G J.W. Miller / Bourns	CONN SPRING MOD MALE 5POS SMD	0
70ADJ-6-ML0 J.W. Miller / Bourns	CONN SPRING MOD MALE 6POS SMD	6533
70ADJ-3-ML0 J.W. Miller / Bourns	CONN SPRING MOD MALE 3POS SMD	49
70ADH-6-ML0 J.W. Miller / Bourns	CONN SPRING MOD MALE 6POS PCB	0
70ADJ-2-FL1G J.W. Miller / Bourns	CONN SPRING MOD FEMALE 2POS SMD	190
70ADH-2-ML0 J.W. Miller / Bourns	CONN SPRING MOD MALE 2POS PCB	0

Rectangular Connectors - Spring Loaded

1. Overview

Spring loaded rectangular connectors are a specialized type of electrical interconnect system featuring spring-actuated contact elements. Their design enables reliable electrical connections in applications requiring high mating cycles, vibration resistance, and precise alignment compensation. These connectors play a critical role in modern electronics by enabling robust power and signal transmission in challenging environments such as automotive testing, industrial automation, and medical equipment.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Board-to-Board	Self-aligning contacts for PCB stacking	Telecom backplanes, server racks
Wire-to-Board	Daisy-chain wiring solutions	Industrial sensors, test equipment
High-Density	Miniaturized contact arrays	Medical imaging devices, UAVs
High-Current	Multi-point contact design for >50A	EVTOL charging systems, battery packs
Hermetic	Sealed against environmental factors	Aerospace avionics, underwater sensors

3. Structure and Components

Typical construction includes:

Contact Elements: Phosphor bronze or beryllium copper with gold plating
Insulation Housing: High-temperature thermoplastics (LCP, PPS)
Actuation Mechanism: Precision compression springs (0.5-5N force range)
Shielding: Optional EMI/RFI protection layers
Retention System: Mechanical latches or magnetic assist

4. Key Technical Specifications

Parameter	Typical Range	Importance
Current Rating	1-200A/contact	Determines power capacity
Contact Resistance	5-20m	Affects signal integrity
Dielectric Strength	500-2500VAC	Safety isolation
Mating Cycles	10k-100k	Service lifetime
Operating Temp	-55 C to +150 C	Environmental tolerance
Vibration Resistance	20G-50G	Reliability in motion

5. Application Fields

Primary industries:

Telecommunications: 5G base stations, optical transceivers
Industrial Automation: Robotic arms, conveyor systems
Military/Aviation: Radar systems, flight control panels
Medical: Patient monitoring systems, MRI equipment
Automotive: EV battery test fixtures, autonomous driving sensors

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Amphenol	BLADE Series	Modular design, 100G vibration resistance
Molex	Pogo Pin System	Self-cleaning contacts, 100k cycles
TE Connectivity	MICROCHOICE	0.8mm pitch, 10GB/s data rate
Samtec	SEARAY	High-density array, IP68 rating
ITT Cannon	VI-LINK	Optical-electrical hybrid integration

7. Selection Guidelines

Key considerations:

Determine current/voltage requirements with safety margins
Evaluate environmental conditions (temperature, humidity, shock)
Match contact pitch with PCB layout constraints
Consider termination type (solder, crimp, press-fit)
Verify compliance with standards (IPC, MIL-STD)
Calculate total cost of ownership including maintenance

8. Industry Trends

Emerging developments:

Miniaturization: 0.4mm pitch connectors for wearable devices
High-speed capabilities: 56Gbps differential pairs
Smart integration: Embedded sensors for condition monitoring
Eco-friendly materials: Halogen-free polymers and lead-free plating
Automated mating: Robotics-compatible alignment systems