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KBN4L21 – KEY OP. ANGLED ‘T’ 2NA+1NC SLOW BREAK
Lovato Electric KBN4L21 electrical installation component for professional commercial and industrial assemblies, suitable for maintenance, replacement and panel building applications.
£51.67
Lovato KBN4L21 Angled T Key Plastic Safety Switch 2NO+1NC
The Lovato Electric KBN4L21 is a professional key-operated safety limit switch from the K series, designed for reliable machine safety, industrial automation and protective guarding applications. Featuring an angled "T" key actuator, polymer thermoplastic housing and 2NO+1NC slow-action contacts, the KBN4L21 provides dependable switching performance for safety interlock circuits, machine guards and industrial control systems.
Designed to EN 50047 dimensional standards, the KBN4L21 features a bottom M20 cable entry, forced opening capability and self-releasing screw terminal connections. Its compact plastic construction provides a reliable solution for monitoring machine doors, access points and protective guards in industrial environments.
Why Choose the Lovato Electric KBN4L21?
- Genuine Lovato Electric component: Designed for dependable industrial safety and automation applications.
- Key-operated safety design: Suitable for machine doors, guards and access point monitoring.
- 2NO+1NC slow-action contacts: Provides flexible switching for safety and control circuits.
- Angled "T" key actuator: Designed for secure mechanical operation in safety interlock applications.
- Durable thermoplastic housing: Provides reliable performance in demanding industrial environments.
Product Specifications
| Manufacturer | Lovato Electric |
|---|---|
| Product Code | KBN4L21 |
| Product Type | Safety Limit Switch |
| Series | KBN |
| Actuator Type | Angled "T" Key |
| Contact Configuration | 2NO + 1NC Slow Action |
| Housing Material | Polymer Thermoplastic |
| Cable Entry | M20 Bottom Entry |
| Cable Connection | Self-releasing screw terminal |
| Thermal Current Ith | 10A |
| Rated Insulation Voltage Ui | 690V |
| Rated Impulse Withstand Voltage Uimp | 6kV |
| IEC/EN 60947-5-1 Designation | A600 Q600 |
| Insulation Class | Class II |
| Mechanical Life | 100,000 cycles |
| B10d | 100,000 cycles |
| Forced Opening | Yes |
| Operating Temperature | -25°C to +70°C |
| Protection Rating | IP65 |
| Dimensions | 30 x 30 x 93mm |
| Weight | 90g |
| EAN | 8013975115398 |
Applications
- Machine guard safety monitoring
- Industrial automation equipment
- Safety interlock circuits
- Manufacturing machinery protection
- Industrial control panels
Technical Specifications
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| Device Type | Limit switch | |
|---|---|---|
| Switching Action | Slow action | |
| Housing Material | Plastic | |
| Connection | M20 cable entry | |
| Weight [g] | 96 | |
| Qty. per package | 1 | |
| Multiple qty. of packs per order | 1 | |
| Package dimensions [mm] | 100X044X032 | |
| Volume [cm³] | 140.8 | |
| Bar code [EAN13] | 8013975115398 | |
| Product designation | Key operated | |
| Product type designation | KBN | |
| Housing Material | Polymer thermoplastic | |
| Key shape | Angled "T" | |
| Type of contact | 2NO+1NC Slow action | |
| Thermal current Ith | 10 | |
| IEC/EN 60947-5-1 designation | A600 Q600 | |
| Rated insulation voltage Ui [V] | 690 | |
| Rated impulse withstand voltage Uimp | 6 | |
| Insulation class | II | |
| Short-circuit protection with fuse | 10 gG/SC QUICK FUSE | |
| min | 16 | |
| max | 14 | |
| IEC Conventional free air thermal current Ith | 10 | |
| Resistance per pole (average value) | <10 | |
| Mechanical life | 100000 | |
| B10d | 100000 | |
| Mechanical operation | 3600 | |
| Operating head fixing | Locking bayonet insert | |
| min [mm²] | 1.5 | |
| max [mm²] | 2.5 | |
| Cable connection | Self-releasing screw terminal | |
| Cable entry | M20 on the bottom | |
| Pollution degree | 3 | |
| min [°C] | -40 | |
| max [°C] | +70 | |
| ETIM 8.0 | EC000030 - End switch | |
| HS Code | 85365080 |
Frequently Asked Questions
What is the Lovato KBN4L21 used for?
The Lovato KBN4L21 is used as a key-operated safety limit switch for machine guards, protective doors and industrial safety interlock applications.
What contact arrangement does the KBN4L21 have?
The KBN4L21 features two normally open and one normally closed slow-action contacts.
What type of actuator does the KBN4L21 use?
The KBN4L21 uses an angled "T" key actuator designed for key-operated safety switching.
What cable entry does the KBN4L21 use?
The KBN4L21 uses an M20 bottom cable entry connection for industrial electrical installations.
