Terminals - Quick Connects, Quick Disconnect Connectors

Part Number	Description / PDF	Quantity
8282 Keystone Electronics Corp.	CONN QC TAB 18-22AWG 0.250 CRIMP	300
1280 Keystone Electronics Corp.	CONN QC TAB 0.250	2147483647
1265 Keystone Electronics Corp.	CONN QC TAB 0.250 SOLDER	52525500
8272 Keystone Electronics Corp.	CONN QC RCPT 18-22AWG 0.187	300
7832 Keystone Electronics Corp.	CONN QC TAB 0.250 SOLDER	69544200
1227 Keystone Electronics Corp.	CONN QC TAB 0.110	4526000
1277 Keystone Electronics Corp.	CONN QC TAB 0.250	0
1289-STR Keystone Electronics Corp.	MALE .250" QUICK FIT TERMINAL ST	38750
1287-R Keystone Electronics Corp.	MALE .250" QUICK FIT TERMINAL	2147483647
4118 Keystone Electronics Corp.	CONN QC TAB 0.250	0
4117 Keystone Electronics Corp.	CONN QC TAB 0.250	0
4059 Keystone Electronics Corp.	CONN QC TAB 0.205	0
3525 /.012" Keystone Electronics Corp.	CONN QC RCPT 0.205 PRESS-FIT	0
9-3548-DIM Keystone Electronics Corp.	CONN QC RCPT 0.187 SOLDER	0

Terminals - Quick Connects, Quick Disconnect Connectors

1. Overview

Quick connects/disconnects (QCDs) are electrical connectors designed for rapid, tool-free connection and disconnection of circuits. These components enable efficient maintenance, modular system design, and reliable signal/power transmission in complex systems. Their importance spans across industries requiring frequent interface changes while maintaining electrical integrity.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Single-contact QCDs	Simple push-pull mechanism, 1-10A rating	Consumer electronics peripherals
Multicontact Array	Parallel signal/power paths, IP67 rated	Industrial automation equipment
Hydraulic Couplings	Fluid-tight sealing, 3000psi pressure	Construction machinery hydraulics
Blade Terminals	Tab-width standardized (4.8-9.5mm), vibration-resistant	Automotive electrical systems
Push-to-Connect	Self-locking collet mechanism, 0.5s engagement	Medical device rapid deployment

3. Structural Composition

Typical QCD construction includes:

Dielectric housing (PA66, LCP, or PBT materials)
Contact elements (phosphor bronze, beryllium copper)
Retention mechanism (spring-loaded collets, detent balls)
Environmental seals (EPDM or silicone O-rings)
Strain relief components (integral cable clamps)

4. Key Technical Parameters

Parameter	Typical Range	Significance
Contact Resistance	1-10 m	Directly affects power loss
Insulation Resistance	100M -10G	Ensures circuit isolation
Operating Temperature	-55 C to +150 C	Determines environmental suitability
Insertion Force	5-50N	Impacts user experience
Durability	500-10,000 cycles	Service life indicator

5. Application Fields

Primary industries include:

Automotive (EV charging interfaces, sensor harnesses)
Aerospace (avionics rack connections)
Industrial Automation (robotic arm tooling)
Medical (patient monitoring equipment)
Telecommunications (base station RF connections)

6. Leading Manufacturers

Manufacturer	Representative Product	Key Specification
TE Connectivity	MICRO SWITCH QT	IP69K rated, 1000VAC
Molex	PicoBlade 0.8mm	0.3A contact rating
Amphenol	QCD Series 262	Hydraulic 3000psi capability
Weidm ller	OMQ Quick Connect	Vibration-proof design
Delphi	Metri-Pack 150	Automotive standard

7. Selection Guidelines

Key considerations:

Current/voltage requirements (derating factors)
Environmental protection needs (IP rating)
Engagement/disengagement frequency
Space constraints (3D footprint)
Material compatibility (corrosion resistance)
Certification requirements (UL, CE, MIL-STD)

8. Industry Trends

Current development trends include:

Nanocoating integration for corrosion resistance
Smart connectors with embedded sensors
Miniaturization (sub-mm contact spacing)
High-temperature superconducting materials
Automated mating systems for Industry 4.0