Square D TeSys Deca Pneumatic Time Delay Auxiliary Contact Block, On-Delay
The Square D TeSys Deca Pneumatic Time Delay Auxiliary Contact Block is an on-delay timer attachment designed for TeSys Deca LC1D and TeSys F LC1F contactors and CAD control relays. It features 1 NO and 1 NC contacts rated up to 10A 690V AC, with an adjustable on-delay timing range of 0.1 to 30 seconds and screw clamp terminal connections. Rated IP20 per IEC 60529, this auxiliary contact block delivers precise, code-compliant timing control for industrial and commercial control panel applications.
Key Features
- Contact Configuration: 1 NO and 1 NC auxiliary contacts rated up to 10A 690V AC for dependable switching.
- On-Delay Timing: Adjustable pneumatic on-delay setting range of 0.1 to 30 seconds (1-30s) for precise sequencing.
- Screw Clamp Terminals: Secure screw clamp terminal connections for reliable field wiring.
- Contactor/Relay Compatibility: Designed for use with TeSys Deca LC1D, TeSys F LC1F contactors, and CAD/CR1F control relays.
- Ingress Protection: IP20 rated per IEC 60529.
- Mechanical Durability: Rated for 5 million operating cycles.
- Non-Overlap Contact Timing: 1.5 ms non-overlap between NC and NO contacts on energization and de-energization.
- Housing: Dark grey, front-mounted construction.
Certifications & Compliance
- UL Listed
- CSA Certified
- IECEE CB Scheme
- UKCA Marked
- CCC Certified
- EAC Certified
- Complies with UL 60947-5-1, CSA C22.2 No 60947-5-1, and EN/IEC 60947-5-1
Technical Specifications
- Warranty: 18 months
- Warranty Period: 18 months
- Sustainable Packaging: Yes
- Mercury Free: Yes
- Packaging Without Single Use Plastic: Yes
- Tier Id: 1
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- Serviceability: No
- With Recycled Cardboard: Yes
- WEEE Product Category: 5
- China ROHS In Scope: No
- Return Indicator: Y
- Take Back: No
- Tier: 1
- Returnability: Yes
- Field Service Division: PPIBS
- Operating Altitude: 9842.52 ft (3000 m)
- Product Contributes To Saved And Avoided Emissions: No
- Insulation Resistance: > 10 MOhm
- Installation Carbon Footprint: 1.15227256240615e-02 kg CO2 eq.
Typical Applications
- Industrial Control Panels
- Contactor and Control Relay Circuits
- Motor Control Centers
- Time-Delayed Switching and Sequencing Applications
- Commercial and Industrial Automation Systems
Why Square D?
Square D TeSys Deca components are engineered to UL 60947-5-1, CSA C22.2 No 60947-5-1, and EN/IEC 60947-5-1 standards, backed by UL, CSA, CCC, EAC, UKCA, and IECEE CB Scheme certifications for dependable global deployment. Rated for 5 million mechanical cycles with IP20 protection and screw clamp terminal connections, this time delay auxiliary contact block is built for reliable, code-compliant performance in professional control panel installations.
Manufacturer Resources
Product Specs
- Product Type:
- Auxiliary Contact Block
- Series:
- TeSys Deca
- Configuration:
- 1 NO + 1 NC
- Connection Type:
- Screw Clamp
- Voltage Rating:
- 690V
- Amperage Rating:
- 10A
- Listing:
- UL Listed
- Product Color:
- Dark Grey
- Department:
- Electrical
- Product Group:
- Motor Control & Automation
- Product Subgroup:
- Contactors & Relays
Square D LADT2 – Frequently Asked Questions
1) Will the Square D LADT2 time delay block mount on an LC1D contactor?
Yes. The LADT2 pneumatic on-delay block is a front-mounted attachment built for TeSys Deca LC1D contactors, TeSys F LC1F contactors, and CAD/CR1F control relays. It mounts to the front face of the contactor rather than the side, so if you already have an auxiliary block on the front position you will need to plan the stack accordingly.
2) Is the LADT2 an on-delay or off-delay timer block?
On-delay only. The LADT2 is a pneumatic on-delay (delay after energization) block with an adjustable range of 0.1 to 30 seconds. If your sequence needs the contacts to change state after the coil drops out, an on-delay block will not do it and you need an off-delay version instead.
3) Is the Square D LADT2 contact block UL Listed for use in a control panel we have to get inspected?
Yes. The LADT2 is UL Listed and CSA Certified, and complies with UL 60947-5-1, CSA C22.2 No 60947-5-1, and EN/IEC 60947-5-1. It also carries CCC, EAC, UKCA marking and the IECEE CB Scheme, which matters if the panel is being exported.
4) What contact configuration and switching rating does the LADT2 give me?
One normally open and one normally closed contact, rated up to 10A at 690V AC. That covers typical control-circuit duty in a panel: pilot lights, relay coils, interlocks, and contactor coil pick-up.
5) Can I use a pneumatic time delay block like this instead of a separate panel timer relay?
For simple sequencing, yes, and that is the point of it. The LADT2 bolts straight onto the contactor and times off the contactor's own operation, so you save the DIN rail space, the socket, and the extra coil wiring a standalone timer relay needs. Where it is the wrong choice: the range is fixed at 0.1 to 30 seconds, it is on-delay only, and adjustment is a mechanical dial rather than a digital setting. If you need longer intervals, repeat cycling, or multiple timing functions in one device, use a dedicated timer relay.
6) Does the LADT2 need an enclosure, or can it go in an open control panel?
It is IP20 rated per IEC 60529, which means finger protection against solids but no protection against water. It belongs inside an enclosed control panel or MCC section, not in a wash-down, outdoor, or dusty open-air location.
7) How many operations will the LADT2 take in a high-cycle machine application?
Mechanical life is rated at 5 million operating cycles. There is also 1.5 ms of non-overlap between the NC and NO contacts on both energization and de-energization, which keeps the two contacts from being closed at the same moment in an interlock circuit.
8) What exact part number do I order for the Square D TeSys pneumatic on-delay block?
The part number is LADT2, a dark grey front-mount pneumatic on-delay block in the TeSys Deca family. One model covers the whole offering here, so the only thing left to confirm is that your contactor is an LC1D, LC1F, CAD or CR1F.
9) What kind of wire terminations does this time delay block use?
Screw clamp terminals, so it takes standard field-wired control conductors with a flat or cross-head driver. If your panel is standardized on spring-cage or ring-tongue terminations you will be mixing methods at this device.
10) Can this contact block be used in a panel at high elevation?
Operating altitude is rated to 3000 m (9842.52 ft), so installations in high mountain sites are within spec without derating guidance beyond that figure. Insulation resistance is greater than 10 MOhm.
How fast can I get the Square D LADT2 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D LADT2 come with a warranty?
Absolutely. The Square D LADT2 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D LADT2?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Square D LADT2 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.