SICK ES21 Series Emergency Stop Push Button, 2 NC, IP65

RS Stock No.:: 285-1293
Mfr. Part No.:: ES11-SA2B8 / 6051328
Manufacturer:: SICK

Subtotal (1 unit)*

€146.65

(exc. VAT)

€180.38

(inc. VAT)

In Stock

2 unit(s) ready to ship from another location
Plus 4 unit(s) shipping from 18 November 2026

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

Units	Per unit
1 +	€146.65

*price indicative

RS Stock No.:: 285-1293
Mfr. Part No.:: ES11-SA2B8 / 6051328
Manufacturer:: SICK

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	SICK
	Product Type	Emergency Stop Push Button
	Contact Configuration	2 NC
	Housing Material	Polybutylene Terephthalate
	Illuminated	No
	Series	ES21
	IP Rating	IP65
	Colour	Red
	Contact Current	100mA
	Contact AC Voltage	30V ac
	Contact DC Voltage	30V dc
	Depth	52mm
	Switch Configuration	Slow Action
	Hazardous Area Certification	No
	Standards/Approvals	China RoHS, cULus, EN, EU DoC, TPC, UKCA
	Length	52mm
	Width	40mm
	Push Button Material	Polybutylene Terephthalate
	Safety Contacts	2 NC

	Select all
	Brand SICK
	Product Type Emergency Stop Push Button
	Contact Configuration 2 NC
	Housing Material Polybutylene Terephthalate
	Illuminated No
	Series ES21
	IP Rating IP65
	Colour Red
	Contact Current 100mA
	Contact AC Voltage 30V ac
	Contact DC Voltage 30V dc
	Depth 52mm
	Switch Configuration Slow Action
	Hazardous Area Certification No
	Standards/Approvals China RoHS, cULus, EN, EU DoC, TPC, UKCA
	Length 52mm
	Width 40mm
	Push Button Material Polybutylene Terephthalate
	Safety Contacts 2 NC

Datasheet - ES11-SA2B8

COO (Country of Origin):: DE

SICK ES21 Series Emergency Stop Push Button, 100mA Contact Current, IP65 - ES11-SA2B8 / 6051328

This emergency stop push button provides a compact, non‑illuminated safety command device intended for machine and production‑line shutdown. Designed for use with safety controllers supporting series connection and diagnostics, it employs slow‑action switching with positive‑action normally closed contacts to interrupt control circuits at low voltages. The unit features a polybutylene terephthalate housing and meets multiple approvals for industrial installations.

Features and Benefits:

• 2NC safety contacts provide redundant circuit interruption
• 30V DC rated contact voltage supports low‑voltage control systems
• 100mA contact current suits low‑current safety inputs
• IP65 ingress protection enables use in dusty or wet areas
• Slow action switching element reduces contact bounce during operation

Applications

• Suitable for integration with Flexi Loop safety controllers
• Used with safety relay modules in Compact control panels
• Ideal for emergency shutdowns on low‑voltage machinery
• Can be used where non‑illuminated operator interfaces are required
• Suitable for industrial stations requiring recognised approvals

What connection type does it use?

It connects via an M12 plug connector with 4 pins and a PBT coupling nut.

What operating temperature range is supported?

It operates between -25°C and +70°C for standard industrial environments.

How many switching cycles does the emergency function support?

The emergency stop push button electrical and mechanical life is specified as 5x10^4 switching cycles.

Which approvals and declarations accompany the device?

It carries cULus, EN, UKCA, China RoHS and an EU declaration of conformity.

What materials are used for the actuator and housing?

The housing and coupling nut are MADE from polybutylene terephthalate to provide Durable insulation.