RS PRO Industrial Circular Connector, 4 Contacts, In-Line, SY21 Connector, Socket, Female, IP67, SY21 Series

RS Stock No.:: 303-945
Manufacturer:: RS PRO

RS PRO Industrial Circular Connector, 4 Contacts, In-Line, SY21 Connector, Socket, Female, IP67, SY21 Series

Bulk discount available

Subtotal (1 unit)*

SGD15.31

(exc. GST)

SGD16.69

(inc. GST)

FREE delivery for orders over $150, or create a business account to enjoy free delivery from just $28

In Stock

Plus 3 unit(s) shipping from 20 April 2026
Plus 10 unit(s) shipping from 12 May 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 - 9	SGD15.31
10 - 24	SGD14.08
25 +	SGD12.71

*price indicative

RS Stock No.:: 303-945
Manufacturer:: RS PRO

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	RS PRO
	Number of Contacts	4
	Product Type	Industrial Circular Connector
	Mount Type	In-Line
	Current	10A
	Connector Size	SY21
	Plug/Socket	Socket
	Contact Gender	Female
	IP Rating	IP67
	Series	SY21
	Orientation	Straight
	Voltage	500V ac
	Mating Type	Bayonet
	Termination Type	Screw
	Minimum Operating Temperature	-40°C
	Shell Size	29P
	Housing Material	Polyamide 66, Polycarbonate
	Maximum Operating Temperature	85°C
	Standards/Approvals	RoHS
	Pole Format	4
	Contact Plating	Gold
	Contact Material	Brass

	Select all
	Brand RS PRO
	Number of Contacts 4
	Product Type Industrial Circular Connector
	Mount Type In-Line
	Current 10A
	Connector Size SY21
	Plug/Socket Socket
	Contact Gender Female
	IP Rating IP67
	Series SY21
	Orientation Straight
	Voltage 500V ac
	Mating Type Bayonet
	Termination Type Screw
	Minimum Operating Temperature -40°C
	Shell Size 29P
	Housing Material Polyamide 66, Polycarbonate
	Maximum Operating Temperature 85°C
	Standards/Approvals RoHS
	Pole Format 4
	Contact Plating Gold
	Contact Material Brass

COO (Country of Origin):: CN

RS PRO Industrial Circular Connector, 4 Contacts, IP67, Bayonet Coupling

This RS PRO Industrial Circular Connector is designed for robust applications requiring high water resistance. With an IP67 rating, it ensures reliable performance in harsh environments. The bayonet coupling mechanism provides secure and quick connections, making it ideal for industrial use.

Features and Benefits

IP67 waterproof connector: Offers high water resistance for outdoor and wet environments

Bayonet coupling: Ensures quick and secure connections, reducing installation time

Voltage rating of 500 V AC: Suitable for high-voltage applications

Gold contact plating: Enhances conductivity and reduces corrosion

Nylon 66 and polycarbonate housing: Provides durability and resistance to impact

Applications

Industrial machinery

Outdoor equipment

Automotive systems

Marine applications

Additional Information

Key standards: Complies with IP67 rating for water and dust resistance

Contact material: Brass for reliable electrical performance

Operating temperature range: -40 °C to 85 °C for versatile environmental conditions

Why RS PRO?

RS PRO is the own brand of RS, offering professional quality products and solutions across all industries and technologies. Our product range is rigorously tested, inspected, and audited against demanding international standards to provide you with industrial-grade quality, at the right price. Making RS PRO your smart choice.