Schneider Electric K1D004NCHC – Auxiliary Contact Block | TeSys K / D Series
The Schneider Electric K1D004NCHC is a front-mount auxiliary contact block engineered for the TeSys K and TeSys D contactor families. Designed for industrial control panels where reliable status feedback and interlocking are critical, this 4NC (4 normally-closed) contact block snaps directly onto LC1K and LC1D series contactors without tools, enabling rapid commissioning in demanding automation environments.
Procurement engineers specifying motor control centers, conveyor systems, or HVAC control panels rely on the K1D004NCHC for its compact DIN-rail-compatible footprint, IEC-certified contact ratings, and seamless integration with Schneider Electric’s TeSys ecosystem.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | K1D004NCHC |
| Manufacturer | Schneider Electric |
| Series | TeSys K / TeSys D |
| Contact Configuration | 4NC (4 Normally Closed) |
| Mounting Position | Front-mount (snap-on) |
| Compatible Contactors | LC1K06–LC1K38, LC1D09–LC1D38 |
| Rated Voltage (Ue) | 690 V AC / 300 V DC |
| Rated Current (Ie) | 10 A (AC-15), 6 A (DC-13) |
| Thermal Current (Ith) | 10 A |
| Mechanical Durability | 10 million operations |
| Electrical Durability | 1 million operations (AC-15) |
| Degree of Protection | IP20 (terminals), IP40 (body) |
| Operating Temperature | -40°C to +70°C |
| Standards | IEC/EN 60947-5-1, UL 508, CSA C22.2 |
| Terminal Type | Screw clamp, 1.5–4 mm² wire range |
| Weight | ~100 g |
| Country of Origin | China |
Proven Application Environments
- Motor Control Centers (MCC): Interlocking and status feedback for motor starters in pump stations, compressors, and fans
- Conveyor & Material Handling: Emergency stop interlocking and run-status signaling in logistics automation
- HVAC Systems: Chiller and AHU contactor monitoring in building management systems
- Machine Tool Control: Spindle and axis drive interlocking in CNC machining centers
- Process Industry: Valve actuator and agitator control in chemical and pharmaceutical plants
- Power Distribution Panels: Feeder contactor status monitoring in LV switchgear assemblies
Engineering Advantages
- Tool-free snap-on mounting directly to TeSys K/D contactor body — reduces panel wiring time by up to 40%
- 4NC configuration ideal for safety interlocking, guard monitoring, and fail-safe control logic
- Wide temperature range (-40°C to +70°C) supports outdoor enclosures and cold-storage environments
- IEC/UL/CSA triple certification simplifies global project compliance documentation
- Silver-alloy contacts ensure low contact resistance and extended service life under high-cycle duty
- Compact form factor preserves panel space — no additional DIN rail position required
System Architecture & Signal Flow
The K1D004NCHC mounts to the front face of the host contactor (LC1K or LC1D series) via a positive-locking clip mechanism. The four NC contacts are mechanically linked to the main contactor armature, providing mirror-image status of the power contacts:
- Contactor de-energized (coil OFF): All 4 NC contacts CLOSED → control circuit active, permissive signals passed
- Contactor energized (coil ON): All 4 NC contacts OPEN → interlocking signals broken, feedback to PLC/SCADA confirmed
- Signal wiring: Screw terminals A1–A2 (contacts 1–2) through D1–D2 (contacts 7–8) per IEC terminal numbering
- PLC integration: 24 V DC digital input compatible; no signal conditioning required for standard Siemens, Allen-Bradley, or Mitsubishi I/O modules
Sourcing & Quality Verification
- All units sourced from authorized Schneider Electric distribution channels or verified OEM-surplus stock
- Each unit inspected for original packaging integrity, date code, and CE/UL marking before shipment
- Traceability documentation (CoC, test reports) available upon request for IEC 61511 / SIL-rated applications
- Konmask.com maintains ISO 9001-aligned incoming inspection procedures for all industrial automation components
- Anti-counterfeit verification: holographic Schneider Electric labels checked against current authentication standards
Procurement Process
- Confirm compatibility: Verify your host contactor model (LC1K__ or LC1D__ frame size) against the compatible range above
- Specify quantity: Single units, project lots, and blanket orders accepted; volume pricing available for 10+ units
- Submit inquiry: Email support@konmask.com with part number, quantity, and required delivery date
- Receive quotation: Formal quotation with lead time issued within 24 business hours
- Order confirmation: Pro-forma invoice issued; payment via T/T, PayPal, or trade credit (approved accounts)
- Shipment: DHL / FedEx express worldwide; EXW Xiamen or CIF destination available
Technical FAQ
Q: Can K1D004NCHC be used with LC1D09 to LC1D38 contactors?
A: Yes. The K1D series auxiliary contact blocks are mechanically and electrically compatible with both TeSys K (LC1K) and TeSys D (LC1D) contactors in the 9–38 A frame range.
Q: Is there a mixed NO/NC version available?
A: Yes. Schneider Electric offers K1D022 (2NO+2NC), K1D040 (4NO), and K1D031 (3NO+1NC) variants. Contact us to specify the correct configuration for your control logic.
Q: What is the maximum number of auxiliary contact blocks that can be stacked?
A: Typically one front-mount block (K1D series) plus one side-mount block (LA1K series) per contactor, subject to frame size. Consult the TeSys K/D catalog for stacking rules.
Q: Are these RoHS compliant?
A: Yes. K1D004NCHC complies with EU RoHS Directive 2011/65/EU and REACH regulations.
Q: What is the typical lead time from Konmask.com?
A: In-stock units ship within 1–3 business days. Out-of-stock items typically have a 2–4 week lead time from authorized supply channels.
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