JCOF auxiliary contact
TECHNICAL DATA
JCOF Auxiliary Contact Specifications and Contact Ratings
The JCOF auxiliary contact provides mechanically linked breaker-position feedback for control and indication circuits. W9 Group lists a 1NO + 1NC arrangement and a 9 mm body. Confirm the host breaker and contact truth table before specifying this accessory for a panel.
| MAIN CONTACT | AUXILIARY CONTACT |
| In an MCB, it is the principal contact mechanism that connects the load to the supply. | Control, indicator, alarm, and feedback circuits use auxiliary contacts, also known as helpful contacts |
| The main contacts are NO (normally open) contacts, which signifies they will only establish contact when the MCB’s magnetic coil is powered. | Both NO (Normally Open) and NC (Normally Closed) contacts are accessible in auxiliary contact |
| Main contact carries high voltage and high current | Auxiliary contact carries low voltage and low current |
| Sparking occurs due to high current | No sparking occurs in auxiliary contact |
| Main contacts are main terminal connection and motor connections | Auxiliary contacts are utilised primarily in control circuits, indication circuits, and feedback circuits. |
| Standard | IEC61009-1 , EN61009-1 | ||
| Electrical features | Rated value | UN(V) | In (A) |
| AC415 50/60Hz | 3 | ||
| AC240 50/60Hz | 6 | ||
| DC130 | 1 | ||
| DC48 | 2 | ||
| DC24 | 6 | ||
| Configurations | 1 N/O+1N/C | ||
| Rated impulse withstand voltage(1.2/50) Uimp (V) | 4000 | ||
| Poles | 1 Pole (9mm Width) | ||
| Insulation voltage Ui (V) | 500 | ||
| Dielectric TEST voltage at ind.Freq.for 1 min (kV) | 2 | ||
| Pollution degree | 2 | ||
| Mechanical features |
Electrical life | 6050 | |
| Mechanical life | 10000 | ||
| Protection degree | IP20 | ||
| Ambient temperature (with daily average ≤35℃) | -5…+40 | ||
| Storage temperation (℃) | -25…+70 | ||
| Installation | Terminal connection type | Cable | |
| Terminal size top/bottom for cable | 2.5mm2 / 18-14 AWG | ||
| Tightening torque | 0.8 N*m / 7 In-Ibs. | ||
| Mounting | On DIN rail EN 60715 (35mm) by means of fast clip device | ||
SELECTION GUIDE
Selecting a 1NO 1NC Auxiliary Contact for Breaker Position Feedback
Specify the host breaker model, required feedback states, control voltage, load type and terminal arrangement when requesting a JCOF quotation from W9 Group.
Identify the host breaker
Provide the exact MCB or RCBO code. The product title mentions MCCB accessories, while its fitting description names MCB / RCBO; confirm mechanical compatibility.
Define the feedback states
Specify the required open and closed signals, then confirm the terminal truth table. Request a separate fault-trip signal if position feedback alone is insufficient.
Match the control load
Use the AC or DC contact rating for the actual voltage. Confirm load category and minimum reliable switching load for the control input.
Check panel integration
Allow for the listed 9 mm body and request the host fitting, wiring and terminal instructions.
ABOUT W9 GROUP
W9 Group Breaker Auxiliary Contact Supply and Support
Zhejiang W9 Group Technology Co., Ltd. supplies low-voltage electrical products. For a JCOF enquiry, contact W9 Group about configuration and matching product documents.
RELATED RESOURCES
JCOF Auxiliary Contact Wiring and Host Compatibility Documents
Use technical support and related products to specify JCOF. Request a datasheet and wiring diagram matching the selected JCOF configuration.
RELATED PRODUCTJCSD alarm auxiliary contactCompare function and configuration; request separate model ratings
DOCUMENTSW9 Group download centreRequest the current document for your quoted JCOF variant
BUYER FAQ
JCOF Auxiliary Contact FAQs: Feedback, Ratings and Breaker Fit
Find answers about JCOF selection, configuration and ordering.
What does the JCOF auxiliary contact indicate?
It follows the mechanically linked breaker contacts to provide position feedback. Confirm the signal for each open, closed, tripped and reset state using the supplied wiring diagram.
Is JCOF a fault-only alarm contact?
Do not assume fault-only indication. The source describes position feedback; confirm whether a separate alarm accessory is required for your control logic.
Can JCOF directly switch the main load?
It is an auxiliary control contact rather than the main power path. Confirm the intended control load against its voltage-specific contact rating.
Which AC and DC contact ratings are listed?
The supplier table lists 3 A at 415 V AC and 6 A at 240 V AC, plus 1 A at 130 V DC, 2 A at 48 V DC and 6 A at 24 V DC. Confirm the utilization conditions for the offered part.
Does JCOF fit every MCB, RCBO or MCCB?
No universal compatibility is established. The body describes left-side MCB / RCBO fitting while the title uses MCCB; confirm the exact host accessory list before ordering.
Does the contact trip or remotely close the breaker?
Position feedback does not establish an opening or closing actuator. Confirm any separate release or operating mechanism needed by the control system.
What is needed for a JCOF quotation?
Send the required configuration, quantity, destination market and document requirements. Ask W9 Group to confirm price, minimum order quantity, samples and lead time for the selected configuration.
PRODUCT ENQUIRY
Request a JCOF Auxiliary Contact Quotation
Tell W9 Group your host breaker model, required feedback states, control voltage, load type and terminal arrangement, quantity and destination market so the selected configuration can be identified.