Backplane Connectors - Hard Metric, Standard

Image	Part Number	Description / PDF	Quantity	Rfq
	17011102501 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17021252007 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17021752028 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17011002401 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17221254101 HARTING	CONN RECEPT 125POS 2MM PRESS-FIT	0
	17441442205 HARTING	CONN HEADER 144POS 2MM PRESS-FIT	0
	17551441105 HARTING	CONN RECEPT 144POS 2MM PRESS-FIT	0
	17441441206 HARTING	HAR-BUS HM 6ROW MALE 144P PL1	0
	17011322004 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17551442107 HARTING	CONNECTOR	0
	17021752009 HARTING	CONN HEADER 2MM PRESS-FIT	0
	17461441208 HARTING	CONN HEADER 144POS 2MM PRESS-FIT	0
	17420721202120 HARTING	CONNECTOR	0
	17520722805 HARTING	CONN RECEPT 72POS 2MM PRESS-FIT	0
	17461441209 HARTING	CONN HEADER 144POS 2MM PRESS-FIT	0
	17551442106 HARTING	CONN RECEPT 144POS 2MM PRESS-FIT	0
	17112202203 HARTING	CONN HEADER 220POS 2MM PRESS-FIT	0
	17551441806 HARTING	CONN RECEPT 144POS 2MM SOLDER	0
	17551442105 HARTING	CONN RECEPT 144POS 2MM PRESS-FIT	0
	17010102201 HARTING	CONN HEADER 2MM PRESS-FIT	0

Backplane Connectors - Hard Metric, Standard

1. Overview

Hard Metric Standard Backplane Connectors are precision-engineered electrical components designed for high-density interconnection in complex systems. Defined by their standardized 2.54mm (0.1") grid spacing, these connectors ensure mechanical and electrical compatibility across generations of equipment. Their importance in modern technology stems from enabling scalable, high-reliability architectures in telecommunications, industrial automation, and mission-critical computing systems.

2. Main Types & Functional Classification

Type	Key Features	Applications
2.54mm Hard Metric	Standardized pitch, 1-6 rows, up to 60A per contact	Telecom switches, industrial controllers
2.00mm Hard Metric	Reduced pitch, enhanced vibration resistance	High-density servers, medical imaging
1.27mm Hard Metric	Ultra-high density, low insertion force	Compact test equipment, aerospace systems

3. Structure & Composition

Typical construction includes: - Insulating housing (LCP/nylon with high thermal stability) - Contact array (phosphor bronze with gold/silver plating) - Polarization keying for mating assurance - EMI shielding via integrated metal frames - Actuation mechanism (lever-assisted or push-pull variants)

4. Key Technical Specifications

Parameter	Typical Value	Importance
Current Rating	1-60A per contact	Determines power delivery capacity
Contact Resistance	5m	Impacts signal integrity
Dielectric Strength	1000VAC	Safety and insulation reliability
Mating Cycles	200-2000 cycles	System longevity indicator
Operating Temp	-55 C to +125 C	Environmental robustness

5. Application Fields

Telecommunications: 5G base stations, optical transport systems
Industrial: PLC backplanes, test & measurement equipment
Medical: MRI scanners, diagnostic imaging systems
Transportation: Rail signaling systems, avionics

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
TE Connectivity	HERMHARD HM	2.54mm, 3-row, 3000V isolation
Amphenol	HarshIO HM	IP67-rated, extreme vibration resistance
Molex	MX Hard Metric	High-speed differential pairs, 25Gbps

7. Selection Guidelines

Key considerations include: - Electrical requirements (current/voltage per contact) - Mechanical constraints (board spacing, mating force) - Environmental conditions (temperature, vibration) - Future scalability (modular design compatibility) - Cost optimization (total lifecycle vs upfront cost)

8. Industry Trends

Emerging developments include: - Integration with optical backplane technology - Increased adoption of 1.27mm pitch for compact systems - Enhanced thermal management solutions - RoHS-compliant plating materials (replacing cadmium) - Smart connectors with integrated diagnostics