- Automation & ControlView all 2,221 products
- Automation Accessories
- AC Drives
- PLC & I/O Cards
- Industrial Communications
- Vibration Monitoring
- Controllers & Data Acquisition
- Isolator & Barrier
- CCTV & Security
- Safety Switches & Guard Locking
- Encoders
- Motor Soft Starters
- HMI Displays
- Pneumatic Cylinders
- Industrial Computers
- Servo Drives
- Machine Vision
- Automation Software
- Robotics
Brand: Schneider Electric
Schneider Electric LADN20 TeSys D 2 NO Front Contact Block
Description
LADN20: two normally open front contacts for TeSys D
The LADN20 is a Schneider Electric TeSys D front auxiliary contact block with two normally open contacts and screw clamp terminals. It is the choice when a contactor only needs closing signals: a self-hold plus an indication, or two independent run signals. Seven Star LLC supplies the LADN20 in Oman and the GCC as an independent supplier based in Muscat.
The 20 reads as two NO and zero NC. At 26 mm the block is as slim as the LADN11, and the datasheet lists the same terminals, ratings and certification group.
Technical specifications of the LADN20
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Schneider Electric / LADN20 |
| Description | Product datasheet Auxiliary contact block, TeSys D, 2NO, front mounting, screw clamp terminals |
| Range | TeSys; TeSys Deca |
| Product name | TeSys Deca |
| Product or component type | Auxiliary contact block |
| Device short name | LADN |
| Range compatibility | TeSys D CAD; TeSys D LC1D; TeSys F LC1F; TeSys F CR1F; TeSys Deca CAD; TeSys Deca LC1D |
| Mounting location | Front |
| Pole contact composition | 2 NO |
| Contacts operation | Instantaneous |
| [Ue] rated operational voltage | 690 V AC 25 to 400 Hz |
| [Ie] rated operational current | 6 A at 120 V AC-15; 1.04 A at 690 V AC-15; 0.55 A at 125 V DC-13; 0.1 A at 600 V DC-13 |
| [Ui] rated insulation voltage | 690 V conforming to IEC 60947-5-1; 600 V conforming to UL; 600 V conforming to CSA |
| [Ith] conventional free air thermal | 10 A (at 60 °C) |
| Standards | EN/IEC 60947-5-1; GB/T 14048.5; EN 50012; UL 60947-5-1; CSA C22.2 No 60947-5-1; IEC 60335-1:Clause 30.2; IEC 60335-2-40:Annex JJ; UL 60335-2-40:Annex JJ |
| Product certifications | CB Scheme; UL; CSA; CCC; EAC; UKCA |
| Irms rated making capacity | 140 A AC conforming to IEC 60947-5-1; 250 A DC conforming to IEC 60947-5-1 |
| Permissible short-time rating | 100 A 60 °C 1 s; 120 A 60 °C 500 ms; 140 A 60 °C 100 ms; are subject to change – check with your local distributor. |
| Protection type | GG fuse 10 A |
| Mechanical durability | 30 Mcycles |
| Minimum switching current | 5 mA |
| Minimum switching voltage | 17 V |
| Non-overlap time | 1.5 ms on de-energisation no overlap between NC and NO contact; 1.5 ms on energisation no overlap between NC and NO contact |
| Insulation resistance | > 10 MOhm |
| Connections – terminals | Screw clamp terminals 1 cable(s) 1 to 4 mm²flexible with cable end; Screw clamp terminals 1 cable(s) 1 to 4 mm²flexible without cable end |
| Height | 48 mm |
| Width | 26 mm |
| Depth | 42 mm |
| Environmental characteristic | Normal environment |
| IP degree of protection | IP20 conforming to IEC 60529 |
| Ambient air temperature (operation, as listed) | -5 to 60 °C |
| Operating altitude | 3000 m |
LADN20 selection notes
- Two NO contacts, no NC.
- 26 mm wide and 48 mm high.
- Closing signals at up to 690 V AC, 6 A at 120 V AC-15.
- Check low-level loads against the 5 mA / 17 V minimum.
- Consider the LADN11 if one interlock is wanted.
Where two NO contacts of the LADN20 are better than 1 NO + 1 NC
Many control schemes contain no interlock at all. A fan starter with a single start and stop button needs a seal-in contact and perhaps one signal to a building system; both are normally open. Fitting an NC contact there only adds a wire that nobody uses.
Where a design later needs an interlock, the NC can be added by stacking a second block, as long as the contactor width allows it.
Electrical profile of the LADN20
Rated operational voltage is 690 V AC at 25 to 400 Hz, with conventional thermal current of 10 A at 60 °C. Rated operational current is 6 A at 120 V AC-15, 1.04 A at 690 V AC-15, 0.55 A at 125 V DC-13 and 0.1 A at 600 V DC-13. Making capacity is 140 A AC and 250 A DC, protection is a 10 A gG fuse, mechanical durability is 30 Mcycles, and the minimum switching level is 5 mA at 17 V. The non-overlap time between the NC and NO contacts is 1.5 ms on energisation and on de-energisation.
The block fits TeSys D and TeSys Deca contactors and CAD relays, as well as TeSys F LC1F and CR1F, according to the datasheet. Conductors of 1 to 4 mm² flexible are accepted with a ferrule.
Commissioning the LADN20
Clip the block on, tighten the terminals to 1.7 N.m, and test: with the contactor off both contacts should read open; after closing it by hand both should read closed.
Label the terminals on the schematic as the drawing says, and note this in the as-built records.
LADN family: the LADN20 compared with its siblings
All six references below are front-mounting TeSys D blocks with screw clamp terminals; they differ in contact pattern and width.
| Reference | Contacts | Width | Protection |
|---|---|---|---|
| LADN11 | 1 NO + 1 NC | 26 mm | IP20 conforming to IEC 60529 |
| LADN11G | 1 NO + 1 NC | 26 mm | IP20 conforming to IEC 60529 |
| LADN20 | 2 NO | 26 mm | IP20 conforming to IEC 60529 |
| LADN22 | 2 NO + 2 NC | 44 mm | IP20 conforming to IEC 60529 |
| LADN31 | 3 NO + 1 NC | 44 mm | IP2X conforming to IEC 60529 |
| LADN40 | 4 NO | 44 mm | IP2X conforming to IEC 60529 |
LADN20 uses in Oman and the GCC
It is common in simple fan and pump starters in buildings, where one contact seals in the coil and the other feeds the BMS run status.
Another use is as a feedback contact on a main contactor to start an upstream or downstream device after it has closed.
Information to send with an RFQ for the LADN20
- Full reference and quantity required
- Contactor model the block mounts on
- Contact arrangement needed (NO and NC count)
- Control voltage and load of each circuit
- Delivery location and timing
Documents and quotation
A datasheet for the LADN20 is attached on this page. It carries the electrical, mechanical and environmental data summarised above, so the figures can be checked against your drawings.
Send the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.
Other Models in the Se Tesys D Ladn Range
Seven Star LLC supplies models from the Se Tesys D Ladn range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Schneider Electric LADN11 TeSys D 1 NO + 1 NC Contact Block | Contactors & Overload Relays | View details |
| Schneider Electric LADN11G TeSys D 1 NO + 1 NC EN 50012 Block | Contactors & Overload Relays | View details |
| Schneider Electric LADN20 TeSys D 2 NO Front Contact Block | Contactors & Overload Relays | You are viewing this model |
| Schneider Electric LADN22 TeSys D 2 NO + 2 NC Contact Block | Contactors & Overload Relays | View details |
Datasheets & Documents
- Datasheet Schneider Electric LADN20 Datasheet Download
Reviews (0)
About brand
Schneider Electric is the French group for energy management and industrial automation: low and medium voltage switchgear and circuit breakers, motor control, drives, PLCs, power monitoring, UPS systems and building management. Its history goes back to 1836, when the brothers Adolphe and Eugène Schneider took over the iron and steel works at Le Creusot in Burgundy. Over the 20th century the company left steel and heavy engineering and became an electrical group through acquisitions such as Merlin Gerin, Télémécanique, Square D and Modicon. Its head office is in Rueil-Malmaison near Paris, and its shares are listed on Euronext Paris.
Schneider Electric company profile
| Origins | 1836, Le Creusot, France: Adolphe and Eugène Schneider take over the Le Creusot foundry |
|---|---|
| Headquarters | Rueil-Malmaison (Paris region), France |
| Ownership | Public company listed on Euronext Paris |
| Key acquisitions | Télémécanique (1988), Square D (1991), Merlin Gerin (1992), Modicon (1997), APC (2007), Invensys (2014); majority owner of AVEVA software |
| Brand names still in use | Acti9, ComPacT and MasterPacT breakers, TeSys motor control, Altivar drives, Altistart soft starters, Modicon PLCs, Harmony control components, PowerLogic and Easergy protection and metering, APC UPS, EcoStruxure software platform |
| Product families | Low voltage distribution, medium voltage switchgear and protection relays, motor control and drives, PLCs and HMIs, power meters, UPS and cooling, enclosures, building automation and energy software |
Milestones
- 1836: The Schneider brothers acquire the Le Creusot works; the business grows in steel, locomotives and heavy engineering.
- 1975: First investment in Merlin Gerin, a French maker of electrical distribution equipment.
- 1988–1992: Télémécanique, Square D (USA) and Merlin Gerin join the group, making it an electrical specialist.
- 1997: Modicon, the company behind the first programmable logic controller, joins the group.
- 1999: The group takes the name Schneider Electric.
- 2007 and 2014: APC (UPS and data centre power) and Invensys (process automation) are acquired.
Choosing Schneider Electric breakers and motor control
Circuit breakers are chosen by current and breaking capacity. Acti9 miniature circuit breakers (iC60, C120) protect final circuits up to 125 A. ComPacT NSX molded case breakers cover about 16 to 630 A, and the letter after the frame size sets the breaking capacity: B, F, N, H, S, L from lowest to highest. MasterPacT air circuit breakers are used as main incomers on large switchboards. For motors, a TeSys contactor with an LRD overload relay or a GV2 motor circuit breaker suits direct starting, an Altistart soft starter reduces starting current, and an Altivar drive controls speed. The breaking capacity must always be at least the prospective short-circuit current at the point of installation.
Where Schneider Electric products are used
In Oman and the GCC, Schneider Electric equipment is found in main and sub-main switchboards of commercial and residential buildings, motor control centres in water, oil and gas and industrial plants, substations protected by Sepam and Easergy relays, data centres powered by Galaxy and APC UPS systems, and buildings controlled by EcoStruxure Building Operation.
APC by Schneider Electric: UPS and critical power
Since 2007, APC has been part of Schneider Electric and is now its product brand for uninterruptible power supplies, replacement batteries, battery packs, network management cards and rack power distribution. Our APC catalogue covers Smart-UPS line-interactive and on-line models, Easy UPS On-Line, the modular Symmetra LX, RM and PX ranges, Silcon three-phase systems and their spare part kits, and the RBC cartridges that keep them running. Schneider Electric breakers, drives and PLCs can be quoted together with APC UPS systems in one request.
Schneider Electric products we list
| Family | Examples |
|---|---|
| Circuit breakers | Acti9 iC60N, C120N, NSX100F, NSX250N, NSX630, EasyPact EZC, MasterPacT MTZ1, MasterPacT NW |
| Motor control | TeSys Deca LC1D, TeSys F, LRD overload relay, GV2ME08, Altistart 22, Altistart 480 |
| Drives | Altivar 12, Altivar 320, ATV340, Altivar Process 630, ATV930, Lexium 32 servo |
| PLCs, HMIs and relays | Modicon M221, M241, M580 BMEP582040, Zelio Logic, Magelis HMISTU655 |
| Protection, metering and power | Sepam series 20, Easergy P3U30, MiCOM P139, PM5560, iEM3255, Galaxy VS UPS |
Ordering Schneider Electric products: what we need
Send the commercial reference from the label (for example LC1D18M7 or ATV320U22N4C). For breakers, confirm the rated current, number of poles, breaking capacity and trip unit. For contactors, give the coil voltage. For drives, give the motor power and supply voltage. APC products are listed on their own brand page.
Facts checked against Schneider Electric's published company history, October 2026.
Browse Schneider Electric products by category: Circuit Breaker, Electrical & Power Modules, AC Drives, PLC & I/O Cards, Metering Systems, UPS and Batteries.
FAQ
Questions about the Schneider Electric LADN20 TeSys D 2 NO Front
Answers from our engineering team on installation, compatibility and integration.
01What contacts does the LADN20 have?
Two normally open contacts. Check that this arrangement matches your control circuit before ordering.
02What is the width of the LADN20?
26 mm. See the datasheet linked on this page for the full figures.
03What is the making capacity?
140 A AC and 250 A DC per the datasheet.
04What is the torque for terminals?
1.7 N.m. See the datasheet linked on this page for the full figures.
05Which ambient range applies?
-5 to 60 degrees C. See the datasheet linked on this page for the full figures.
Reviews
There are no reviews yet.