Product Description
Eaton M22-K01 Contact Block — 1 N.C., Front Mount, M22 Series
The Eaton M22-K01 is a single-pole, 1 normally closed (N.C.) contact block from the Eaton M22 series, designed for front mounting on Eaton M22 22.5mm pilot device operators including pushbuttons, selector switches, emergency stop devices, and key switches. Featuring screw clamp terminals, IP66 / NEMA 4X / Type 13 sealing, and positively driven N.C. contacts, the M22-K01 is the standard N.C. contact block for M22 panel-mount operators in industrial and commercial control applications.
Quick Specifications
- Contact Configuration: 1 N.C. (Normally Closed), positively driven
- Voltage Rating: 600V AC
- Current Rating: 4A (screw terminal)
- Mounting: Front mount on M22 series operators
- Terminal Type: Screw clamp
- Operator Size: 22.5mm
- IP Rating: IP66 / NEMA 4X / Type 13
- Endurance: 5 million+ mechanical / 1.6 million+ electrical operations
Compatible M22 Operator Types
| Operator Type | Series | Mounting Hole |
|---|---|---|
| Pushbuttons (momentary & maintained) | M22 | 22.5mm |
| Selector Switches (2 & 3 position) | M22 | 22.5mm |
| Emergency Stop Devices | M22 | 22.5mm |
| Key Switches | M22 | 22.5mm |
| Illuminated Pushbuttons | M22 | 22.5mm |
Product Features
- Positively Driven N.C. Contact: The M22-K01 uses a direct opening action (positively driven) on its normally closed contact, ensuring reliable circuit opening even in the event of a welded contact — a critical safety requirement for emergency stop and interlock circuits.
- IP66 / NEMA 4X / Type 13 Rated: Sealed against dust, water jets, and oil splash. Suitable for industrial washdown environments, outdoor enclosures, and harsh process applications.
- Front Mount, Modular Design: Attaches to the front of any M22 series operator. Additional contacts can be added in the middle position using an M22-XW adapter — up to 6 contact blocks total per operator.
- Screw Clamp Terminals: Clearly marked screw clamp terminals accept standard control wiring for fast, secure installation. Anti-rotation tabs prevent unwanted movement during assembly.
- High Endurance: Rated for over 5 million mechanical operations and 1.6 million electrical operations — built for demanding industrial environments with high cycle rates.
- Global Certifications: Compliant with UL, CSA, and IEC standards for domestic and international panel builds.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping.
Frequently Asked Questions
What does M22-K01 mean?
The part number follows Eaton’s M22 series naming convention: M22 = 22.5mm M22 series pilot device accessory, K = contact block, 01 = 1 normally closed (N.C.) contact. The M22-K01 is the N.C. equivalent of the M22-K10 (which provides 1 N.O. contact). Both mount to the front of M22 operators and use the same screw clamp terminal format.
What is the difference between the M22-K01 and M22-K10?
The M22-K01 provides 1 normally closed (N.C.) contact — the circuit is closed at rest and opens when the operator is actuated. The M22-K10 provides 1 normally open (N.O.) contact — the circuit is open at rest and closes when the operator is actuated. For an emergency stop or stop button circuit, M22-K01 is typically required. For a start or run circuit, M22-K10 is typically required. Both blocks are front-mount and compatible with the same M22 operators.
How many M22-K01 blocks can be used on one operator?
Up to 6 contact blocks total can be installed per M22 operator. The M22-K01 mounts to the front position of the operator. To add more contact blocks beyond the front position, an M22-XW intermediate adapter is required to mount contacts in the middle position. M22-K01 and M22-K10 blocks can be combined in any arrangement within the 6-block maximum.
Why is the positively driven N.C. contact important for safety circuits?
Positively driven (direct opening action) contacts mechanically force the N.C. contact open when the operator is actuated, regardless of whether the contact spring has failed or the contact has welded shut. This is a critical requirement for emergency stop circuits under IEC 60947-5-1 and EN ISO 13850, which mandate that the contact cannot rely on a spring to achieve circuit opening. For standard signalling circuits this is not required, but for safety-critical applications the M22-K01’s positive drive action is the correct choice.
Is the M22-K01 compatible with M22-D and M22-DL operators?
Yes — the M22-K01 is compatible with the full range of M22 series operators including M22-D (standard flush pushbutton), M22-DL (illuminated pushbutton), M22-WRK (key-operated), M22-ES (emergency stop), and M22-WRS (selector switch) operators. All M22 series operators use the same 22.5mm mounting hole and accept M22 series contact blocks.
Is the M22-K01 in stock for same-day shipping?
Yes — the M22-K01 is a stocked item at Kent Electrical Supply’s warehouse in Emmaus, PA. Orders placed before 4:00 PM EST ship the same business day. Current stock quantity is shown on this page. For quantity pricing or questions about M22 series compatibility, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
