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EMAS LK20K13 EMAS LIMIT SWITCH CONTACT BLOCK SNAP ACTION 1NC-1NO
EMAS LK20K13 is a snap-action replacement limit switch contact block featuring one normally closed and one normally open contact, a 3 A AC-15 rating at 240 V AC, positive-opening functionality and compatibility with selected EMAS L Series limit switch housings.
£7.21
Why Choose the EMAS LK20K13 Snap-Action Limit Switch Contact Block?
The EMAS LK20K13 is a high-quality snap-action replacement contact block featuring one normally closed (1NC) and one normally open (1NO) contact, designed for compatible EMAS industrial limit switches. This genuine EMAS spare part provides reliable electrical switching for machinery position detection, industrial automation and equipment control applications.
Featuring a 3 A rated operating current at 240 V AC (AC-15), the LK20K13 incorporates a snap-action switching mechanism that changes contact state rapidly when the actuator reaches its operating point. Its short plunger configuration and complementary contact arrangement make it suitable for applications requiring repeatable mechanical switching and position feedback.
With silver nickel (AgNi) contacts, a minimum mechanical endurance of 10 million operations and compatibility with EMAS L1, L2, L3, L5, L51, L52, L53 and L54 limit switch families, the LK20K13 offers a dependable replacement solution for industrial maintenance and OEM machinery applications.
Key Advantages
- Snap-action switching mechanism provides rapid and repeatable contact operation.
- 1NC + 1NO contact configuration enables complementary control and signalling functions.
- 3 A rated operating current at 240 V AC under AC-15 conditions.
- Minimum 10 million mechanical operations for extended industrial service life.
- Minimum 1 million electrical operations under specified operating conditions.
- Silver nickel (AgNi) contacts provide dependable electrical switching performance.
- Positive-opening function supports mechanically operated normally closed contact applications.
- Short plunger arrangement suitable for compatible EMAS limit switch mechanisms.
- Compatible with multiple EMAS L Series limit switch housings.
- Replaceable contact block design simplifies maintenance and reduces unnecessary replacement of complete switch assemblies.
- Suitable for machinery position detection, industrial automation and control circuits.
Key Features
- Genuine EMAS LK20K13 replacement limit switch contact block.
- Snap-action contact operation.
- One normally closed and one normally open contact.
- Short operating plunger.
- Positive-opening contact function.
- AC-15 industrial control switching category.
- 300 V rated insulation voltage.
- 2.5 kV rated impulse withstand voltage.
- −25 to +80 °C operating temperature range.
- 1–2.5 mm² conductor connection capacity.
- Screw-terminal electrical connections.
- Compatible with EMAS L1, L2, L3, L5, L51, L52, L53 and L54 limit switch families.
- Manufactured to TS EN 60947-5-1, UL 508 and VDE 0660 requirements.
Reliable Snap-Action Switching for Industrial Position Detection
The EMAS LK20K13 uses a snap-action switching mechanism that rapidly changes the electrical contact state when the associated limit switch actuator reaches its operating point. This operating principle provides a decisive switching transition, making it suitable for industrial machinery where repeatable position detection is important.
The 1NC + 1NO contact configuration provides two complementary switching functions. The normally closed contact can be used in appropriate monitoring or control circuits, while the normally open contact provides an additional signal when the switch is actuated.
Unlike the EMAS LK20K23 slow-action contact block, which changes contact state progressively with actuator movement, the LK20K13 uses a rapid snap-action mechanism. This makes the LK20K13 particularly suitable where a clear switching transition is required.
The LK20K13 also incorporates a positive-opening normally closed contact function, supporting applications requiring direct mechanical opening of the NC contact. Any safety-related application must be assessed using the complete limit switch assembly and the overall machinery control system.
As a replacement component, the LK20K13 enables maintenance engineers to restore the switching functionality of compatible EMAS limit switches without replacing the entire housing and actuator assembly.
Typical Applications
- Industrial limit switch repair and maintenance.
- Machinery travel limit detection.
- Conveyor position monitoring.
- Packaging and production machinery.
- Industrial automation and PLC input circuits.
- Mechanical position indication.
- Machine sequencing and auxiliary interlocking.
- Automated material handling equipment.
- OEM machinery and electrical control equipment.
- Replacement contact assemblies for compatible EMAS limit switches.
Technical Specifications
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| Device Type | Accessory | |
|---|---|---|
| Contacts | 1NO + 1NC | |
| Product Series | Emas LK Series | |
| Manufacturer | EMAS | |
| Part number | LK20K13 | |
| Product type | Replacement limit switch contact block | |
| Product family | Limit switch spare parts | |
| Contact action | Snap action | |
| Contact configuration | 1NC + 1NO | |
| Normally closed contacts | 1 | |
| Normally open contacts | 1 | |
| Actuating plunger | Short | |
| Positive-opening function | Yes | |
| Rated operating current (Ie) | 3 A at 240 V AC | |
| Utilisation category | AC-15 | |
| Rated insulation voltage (Ui) | 300 V | |
| Rated impulse withstand voltage (Uimp) | 2.5 kV | |
| Mechanical endurance | Minimum 10,000,000 operations | |
| Electrical endurance | Minimum 1,000,000 operations | |
| Mechanical operating frequency | 3,000 operations/hour | |
| Electrical operating frequency | 1,800 operations/hour | |
| Dielectric strength, body to contact | 1,890 V AC | |
| Dielectric strength, contact to contact | 1,890 V AC | |
| Insulation resistance | 10 MΩ at 500 V DC | |
| Operating temperature | −25 to +80 °C | |
| Pollution degree | 3 | |
| Contact material | Silver nickel (AgNi) | |
| Conductor cross-section | 1–2.5 mm² | |
| Terminal tightening torque | 1.5 Nm | |
| Short-circuit breaking capacity (Ics) | 1 kA under specified conditions | |
| Compatible limit switch families | L1, L2, L3, L5, L51, L52, L53 and L54 | |
| Applicable standards | TS EN 60947-5-1, UL 508, VDE 0660 | |
| Certifications | CE, EAC, UKCA; UL contact block certification |
Frequently Asked Questions
What is the EMAS LK20K13 used for?
The EMAS LK20K13 is a replacement snap-action contact block for compatible EMAS industrial limit switches, used for machinery position detection, electrical control and industrial automation applications.
What contact configuration does the LK20K13 have?
The LK20K13 features one normally closed (1NC) and one normally open (1NO) contact, providing complementary electrical switching functions.
Is the EMAS LK20K13 a snap-action or slow-action contact block?
The LK20K13 is a snap-action contact block. Its contacts change state rapidly when the actuator reaches the operating point. The LK20K23 is the corresponding slow-action version.
What is the electrical rating of the EMAS LK20K13?
The LK20K13 is rated at 3 A at 240 V AC for the AC-15 utilisation category, with a rated insulation voltage of 300 V.
Which EMAS limit switches are compatible with the LK20K13?
The LK20K13 is designed for compatible EMAS L1, L2, L3, L5, L51, L52, L53 and L54 limit switch housing families.
Does the LK20K13 have a positive-opening contact?
Yes. The LK20K13 has a positive-opening contact function. Suitability for safety-related applications depends on the complete limit switch assembly and the machinery control system design.
What is the service life of the EMAS LK20K13?
The contact block is specified for a minimum of 10 million mechanical operations and 1 million electrical operations under the manufacturer's stated operating conditions.
Can the LK20K13 be used as a standalone limit switch?
No. The LK20K13 is a replacement contact block and requires a compatible EMAS limit switch housing and actuator to form a complete mechanically operated limit switch assembly.
Dependable Replacement Components for Industrial Limit Switches
EMAS industrial limit switch contact blocks provide reliable replacement solutions for machinery control and automation systems. The EMAS LK20K13 combines snap-action switching, 1NC + 1NO contacts, positive-opening functionality and long mechanical endurance to support dependable operation of compatible EMAS limit switch assemblies.
