ABB 3HAC039834-001 Auxiliary Contact Block NO for Robot Contactors

Product Condition	New original or used original. Please confirm the condition with us before ordering.
Shipping	Ships from Shanghai, China. Typical delivery lead time is 3-5 working days after order confirmation, via DHL / FedEx / UPS with secure protective packaging. Actual lead time depends on the specific condition and stock status confirmed with us.
Buyer Benefits	Genuine ABB 3HAC039834-001 — ABB catalog description: Auxiliar contact block. ABB type designation NO — the normally open version. The normally closed version of this block is 3HAC039834-002, so we confirm which one your circuit needs before quotation. Adds an auxiliary contact to the contactor it is fitted to, for signalling, interlocking and status feedback in the robot controller cabinet. Small, defined spare: 44 × 43 × 10 mm, 0.014 kg — easy to hold on the shelf next to the contactor itself. Each unit is inspected before shipment, with secure export packaging and full order tracking from Shanghai.
Item Location	Shanghai, China
Payment	We accept PayPal, T/T (bank transfer), and Alibaba Trade Assurance.

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Description

Auxiliary Contact Block for ABB Robot Controller Contactors

Specifications

Part Number	3HAC039834-001
ABB Catalog Description	Auxiliar contact block
ABB Type Designation	NO — normally open
Brand	ABB
Category	Contactor accessory — auxiliary contact block
Definition	ABB 3HAC039834-001 is the normally open (NO) auxiliary contact block used with contactors in ABB robot controller cabinets.
Contact Form	Normally open (NO). The normally closed version of this block is 3HAC039834-002 — the two are not interchangeable, so confirm which form your circuit requires.
Function	Adds an auxiliary contact to the contactor it is mounted on, providing a signalling, interlocking or status-feedback contact that follows the contactor state.
For Use With	Contactors in ABB robot controller cabinets — for example the AF26 cabinet contactor (3HAC039832-001). Confirm the contactor type and the auxiliary-contact position from your cabinet documentation before ordering.
Electrical Rating	Not published in the ABB article record for this part number. Confirm the voltage, current and contact rating required by your circuit from the contactor documentation before ordering.
Installation	Mounted on the contactor (auxiliary-contact position)
Selection Rule	Match the complete article number and the contact form (NO here, NC on 3HAC039834-002). Contact blocks that look alike can differ in contact form — the designation, not the appearance, decides the part.
Net Weight	0.014 kg
Gross Weight	0.014 kg
Dimensions	44 × 43 × 10 mm (net depth / length × height × width)
Customs Tariff Number	85369095
WEEE Category	Product not in WEEE scope
Country of Origin	Not confirmed (published sources are in conflict)
Condition	New original or used original. Please confirm the condition with us before ordering.

Industrial Applications

Adding or restoring an auxiliary contact on a contactor in an ABB robot controller cabinet.
Signalling and interlock circuits where the controller needs to know the contactor state.
Status feedback to the control system — for example contactor-closed confirmation used in the safety or start-up sequence.
Service replacement of a worn or damaged auxiliary block during cabinet maintenance.
Cabinet refurbishment and rewiring work where contactor accessories are renewed together with the contactor.

Design Purpose

A contactor switches the power, but the controller also needs to know what the contactor is doing. That is what an auxiliary contact block is for: it clips onto the contactor and provides a small additional contact that follows the contactor's state, so the cabinet can signal, interlock or confirm rather than assume. It is a small part that carries an outsized role — the circuit it feeds is often part of the start-up or safety chain, so a missing or wrong contact stops the cell as surely as a failed contactor.

The consequence is that this part is defined by contact form rather than by shape. 3HAC039834-001 is the normally open version; 3HAC039834-002 is the normally closed one. They sit in the same series and look alike, but they behave oppositely, so the article number is the only reliable identifier. It is also a fitted accessory: the block has to match the contactor it mounts on, which is why the contactor type and auxiliary-contact position are checked before the part is ordered.

Before you order and before you install

Check the contact form: this is the NO (normally open) block. If your circuit needs a normally closed contact, the part is 3HAC039834-002. Do not substitute by appearance.
Confirm the contactor: verify the contactor type and the auxiliary-contact position from your cabinet documentation before ordering.
Energy isolation: de-energize, lock out and verify zero voltage before working in the controller cabinet. Hazardous voltages are present.
Record before removal: photograph the block position and note which terminals the wiring lands on, so the replacement is wired back exactly as found.
Observe the contact rating: the rating is not published against this article number — confirm the voltage and current your circuit demands from the contactor documentation before putting the circuit into service.
Acceptance: after fitting, test the signalling or interlock circuit it feeds with the equipment safely isolated, then confirm correct controller behaviour before returning the cell to production.
Qualified personnel: work inside the controller cabinet must follow the applicable ABB service procedures.

Common Failure Modes

Contact worn or pitted after prolonged switching duty, giving a high-resistance or open auxiliary circuit.
Auxiliary signal permanently on or off because the wrong contact form (NO where NC is needed) was fitted.
Block not seated correctly on the contactor, so the contact does not follow the contactor state.
Terminal or wiring faults — loose connections, mis-terminated leads after a swap.
Contamination or corrosion in the cabinet affecting the contact or terminals.
Mechanical damage to the block or its latch from rough handling during contactor service.

Specific alarm codes are not officially documented for this model. Please contact us with the fault code displayed on your controller for accurate diagnosis.

Why Choose Us

Specialized in industrial robot spare parts for ABB, FANUC, KUKA and YASKAWA.
Contact-form confirmation before quotation: we check whether your circuit needs the NO block (3HAC039834-001) or the NC block (3HAC039834-002), so the part behaves the way your circuit expects.
We can supply the contactor and its accessories together, so a cabinet repair is not held up by a missing small part.
Each unit is inspected before shipment, with secure export packaging and full order tracking from Shanghai.
Quote-based service — send your inquiry with the contactor type and contact form required for a matched offer.

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