2mm Pitch Crimp Type Wire-to-Board Connector: DF51/DF51K Series

In today's industrial equipment market, there's a growing emphasis on manpower-saving and self-actuation technologies, leading to diverse applications like Cooperative Robots, AGVs, AMRs, and Drones. With various internal wiring methods such as PCB mounting, in-line, and branch types, connectors need to offer high reliability to withstand vibration, shock, and environmental factors.

The DF51/DF51K Series provides a solution with its 2mm pitch Crimp type Wire-to-Board connectors, catering to a range of connection needs. These UL/C-UL certified products feature a center lock and side lock for easy handling and a secure connection. They come in various configurations including straight, right angle, DIP, SMT, in-line, branch, single-row, and double-row, with options for gold plating, tin plating, and potting (resin-filled) to safeguard against water, dust, and other contaminants. Additionally, their high contact lance strength ensures that cables remain secure even during wrenching.

Specifications↓

Features↓

Materials/Finish/Product Specifications↓

Applications↓

Specifications

Comparison with Other Companies' Products (2mm Pitch, 4-pos. Right Angle Type)

Our product offers a wide range of variations compared to similar products from other companies, providing you with more options for device designs than ever before.

		HRS DF51 Series	HRS DF51K Series	Company A	Company B	Company C
Locking Style		Side Lock	Center Lock	Center Lock	Center Lock	Center Lock
Mounting Style		DIP	DIP, SMT	DIP	DIP, SMT	DIP
Size	Width	20.2	11.2	10.6	10.0	8.3
	Height	4.5	10.3	8.5	7	7
	Mating Length	14.75	14.55	14.4	18.9	11
Rated Current		3A/pin	3A/pin	3A/pin	3A/pin	2A/pin
Rated Voltage		AC/DC 250V max	AC/DC 250V max	AC/DC 125V max	AC/DC 100V max	AC/DC 250V max
Operating Temperature		-55℃ to 105℃	-55℃ to 105℃	-55℃ to 105℃	-55℃ to 85℃	-40℃ to 105℃
Applicable Wire		22–30 AWG	22–30 AWG	22–30 AWG	22–26 AWG	24–30 AWG
Contact Plating		Tin, Gold	Tin, Gold	Gold	Tin	Tin

Features

Ensuring High Reliability with Specialized Safety Structures

Our connectors feature a specialized structure designed to prevent issues such as incorrect mating and disconnection during assembly, as well as problems caused by fretting corrosion during use.

Applicable to Various Secure Designs for a Wide Range of Equipment

◆Incorrect Mating Prevention Key
Includes a mating mark for visual insertion direction confirmation.

◆Positive Lock Design
Prevents unintended disconnections.

◆Resin Sealing Compatibility (Straight Type Only)
Protects against water or dust intrusion in mounting areas. Supports potting resin up to 3mm.

◆105°C Heat Resistance

◆Fretting Corrosion Measurement
Gold plating type prevents fretting corrosion, making it suitable for applications involving vibration or delivering micro current flow.

Side Lock and Center Lock Types Available

Choose between side lock or center lock types based on your board layout pattern, especially when using multiple mounting connectors in depth or lateral directions.

Locking Types Available to Meet PCB Layout Requirements

DF51 Series Side Lock

Effective when mounting in the width direction

DF51K Series Center Lock

Effective when mounting side-by-side

Low Profile Design for Space-saving

The DF51 Series features a side lock design, eliminating the need for additional unlocking space on top of the connector. This contributes to reducing the overall system size.

Side Lock Saves the Unlocking Space on the Top of the Connector

Cable Routing does not Interfere with Unlocking as
the Locks are Located at Two Sides of the Connector

Use of Branch Adapter to Simplify Wiring

The DF51 Series offers a branch adapter variation that allows for current branching, simplifying internal wiring and reducing cable clutter in messy applications.

The Use of the Adapter Allows the Current to Branch

*The shunting balance in actual use varies with the resistance ratio of the branch destination.

Ex. Robot Arm

Enhanced Efficiency with Composite Branch Adapters

Hirose Electric has launched the composite branch adapter for the DF51 Series, which simplifies wiring by enabling branched power and signal connections in a compact form. This adapter combines a branched contact (power source) with an unbranched contact (signal), allowing a single power line to connect multiple sensors, which reduces both wiring and overall costs. Replacing traditional branch circuit boards with this compact adapter decreases equipment size and cost.
The composite branch adapter features a secure spring-lock mechanism for reliable panel mounting, enhancing ease of installation and removal. Additionally, combining standard and composite branch adapters enables multiple branch connections for further wiring efficiency.

Connection to multiple sensors: Only power source wires are branched to save wiring

Panel-connectable: Fixed panels allow devices to be connected or removed for improved convenience

Crimping Tool Compatibility

The crimping tool used for the DF51 Series is compatible with the DF11 Series. If you already have DF11 Series crimp tools, there's no need to obtain new ones; you can continue using your existing crimp tools.

AWG	Hand tool	Applicator
22	HT801/DF11-22S(A)(10)	AP105-DF11-22S
24-28	HT801/DF11-2428S(A)	AP105-DF11-2428S
24-28	HT801/DF11-EP2428P(A) *When crimp contact is DF11-EP2428PCF(A)	AP105-DF11-EP2428P *When crimp contact is DF11-EP2428PCF(A)
30	HT801/DF11-30S(A)	AP105-DF11-30S

＞DF51 Series Page
(Detailed Specifications)

＞DF51K Series Page
(Detailed Specifications)

＞Contact Us

Materials/Finish/Product Specifications

Material

Component		Material	Finish, Remarks
Housing	Header contact	PBT （DF51K Straight : PA66）	UL94V-0、Black
Housing	Socket	PBT	UL94V-0、Black
Header contact		Brass	Tin or Gold plated over nickel under plating
Crimp contact		Phosphor bronze	Tin or Gold plated over nickel under plating

Characteristic

Rated Current		No. of Pos.	22 AWG	24 AWG	26 AWG	28 AWG	30 AWG
	1 Row	2	3A	2.5A	2A	1A	0.5A
		3-7	2A	2A
	2 Row	4	3A	2.5A
		6-30	2A	2A	1.5A
Rated Voltage	250V AC/DC
Operating Temperature	-55 to +105℃*
Contact Resistance	30 mΩ or less (20 mV, 1 mA)
Withstanding Voltage	650V AC for 1 min.
Insulation Resistance	1,000MΩ Min. (500V DC)
Mating Durability	30 times (Sn), 50 times (Au)

* Including the temperature rising by current flow.

・Variations: Single row (2 to 7 pos.), Double row (4 to 30pos.), Single row branch (2 to 4,6,7 pos.), Composite branch (4, 10 pos.)

・Applicable cable: 22 to 30 AWG

・RoHS compliant

Application Examples

This product is suitable for a wide range of applications, particularly in industrial equipment, due to its abundant variations, space-saving locking style options, and high reliability features.