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1sna399779r2400 – d4/8,snnt2,i,ado
TE Connectivity D4/8.SNNT2.I.ADO 1SNA399779R2400 is a 10 A, 630 V disconnect terminal block combining ADO and screw-clamp connections with a lever-operated disconnect and two 2 mm test sockets for industrial control and automation circuits.
Why Choose the TE Connectivity D4/8.SNNT2.I.ADO 1SNA399779R2400 Disconnect Terminal Block?
The TE Connectivity D4/8.SNNT2.I.ADO 1SNA399779R2400 is a compact disconnect terminal block with ADO and screw-clamp connections, designed for circuit isolation, testing and industrial control wiring. Part of the established TE Connectivity Entrelec ADO System, it combines rapid ADO conductor termination with a conventional screw-clamp connection and a practical lever-operated disconnect function.
The D4/8.SNNT2.I.ADO incorporates two 2 mm test sockets, providing convenient access for electrical measurement, commissioning and fault finding. With an IEC rated current of 10 A, rated voltage of 630 V and rated cross-section of 1.5 mm², it is well suited to control, instrumentation and automation circuits where individual connections need to be isolated or tested.
Its compact 8 mm spacing and compatibility with TH35 DIN rails make the 1SNA399779R2400 straightforward to integrate into industrial control cabinets. The grey and blue housing, IP20 main-terminal protection and combination of ADO and screw-clamp termination provide a versatile solution for professional panel-building applications.
Key Advantages
- Combines ADO and screw-clamp connection technologies in one terminal block.
- Lever-operated disconnect function simplifies circuit isolation.
- Two integrated 2 mm test sockets provide convenient measurement access.
- 10 A IEC rated current with a 1.5 mm² rated cross-section.
- 630 V IEC rated voltage for industrial control applications.
- 8 kV impulse withstand voltage provides robust electrical performance.
- Compact 8 mm spacing supports efficient DIN rail installations.
Key Features
- TE Connectivity Entrelec D4/8.SNNT2.I.ADO disconnect terminal block.
- ADO insulation displacement and screw-clamp connection technologies.
- Lever-operated disconnect function.
- Two 2 mm test sockets.
- 10 A rated current.
- 630 V rated voltage.
- 1.5 mm² rated cross-section.
- 180 A short-time withstand current for 1 s.
- 8 kV rated impulse withstand voltage.
- IP20 protection at the main terminals.
- One-level terminal construction.
- Grey and blue polyamide housing.
- Compatible with TH35-7.5 and TH35-15 DIN rails.
Convenient Circuit Isolation and Testing for Industrial Control
Disconnect terminal blocks allow individual electrical circuits to be opened for testing, commissioning and maintenance while leaving the connected conductors securely terminated. The D4/8.SNNT2.I.ADO incorporates a lever-operated disconnect mechanism together with two 2 mm test sockets, providing practical access for measurement and troubleshooting within control panels.
The combination of ADO and screw-clamp termination provides additional wiring flexibility. The ADO System supports rapid conductor termination and up to two wires per connection, while the screw-clamp side accommodates rigid conductors up to 4 mm² and flexible conductors up to 4 mm². This makes the terminal particularly useful where fast panel wiring must be combined with conventional field-side connections.
Typical Applications
- Industrial control panels and switchgear.
- PLC and automation control systems.
- Instrumentation and measurement circuits.
- Machine building and OEM equipment.
- Commissioning and maintenance circuits.
- Process control and industrial electrical installations.
Technical Specifications
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| Number of Levels | 1 | |
|---|---|---|
| Product Series | TE SNA ADO | |
| Connection | IDC (ADO) | |
| Terminal Type | Disconnect / Test | |
| Conductor Size | 1.5 mm² | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / Entrelec | |
| Series | ADO System | |
| Model | D4/8.SNNT2.I.ADO | |
| Manufacturer part number | 1SNA399779R2400 | |
| Product type | Disconnect IDC terminal block | |
| Function | Disconnect with lever and test sockets | |
| Connection technology | ADO System / screw clamp | |
| Rated current | 10 A IEC | |
| Rated voltage | 630 V IEC | |
| Rated impulse withstand voltage | 8 kV | |
| Rated cross-section | 1.5 mm² | |
| Rated short-time withstand current | 180 A for 1 s | |
| ADO conductor range | 0.34–1.5 mm² | |
| Screw-clamp rigid conductor range | 0.2–4 mm² | |
| Screw-clamp flexible conductor range | 0.22–4 mm² | |
| ADO wires per connection | Up to 2 | |
| Test sockets | 2 × 2 mm diameter | |
| Number of levels | 1 | |
| Wire stripping length | 9.5 mm | |
| Recommended screwdriver | 4 mm | |
| Tightening torque | 0.5–0.8 N·m | |
| Protection rating | IP20 at main terminals | |
| NEMA protection | NEMA 1 | |
| Pollution degree | 3 | |
| Insulation material | Polyamide | |
| Colour | Grey / blue | |
| Mounting type | DIN rail mounting | |
| Compatible rails | TH35-7.5 and TH35-15 | |
| Width / spacing | 8 mm | |
| Height | 68.2 mm | |
| Depth | 40.9 mm | |
| Operating temperature | -55 to +110 °C | |
| Storage temperature | -55 to +110 °C | |
| Weight | approx. 13 g | |
| Pack quantity | 50 | |
| Barcode / EAN | 3472593997796 |
Frequently Asked Questions
What is the TE Connectivity D4/8.SNNT2.I.ADO 1SNA399779R2400?
The D4/8.SNNT2.I.ADO is a disconnect terminal block with ADO and screw-clamp connections, a lever-operated disconnect mechanism and two 2 mm test sockets for industrial control and automation circuits.
What current and voltage is the D4/8.SNNT2.I.ADO rated for?
The terminal block has an IEC rated current of 10 A, a rated voltage of 630 V and a rated cross-section of 1.5 mm². Its rated impulse withstand voltage is 8 kV.
Does the 1SNA399779R2400 include test sockets?
Yes. The D4/8.SNNT2.I.ADO incorporates two 2 mm diameter test sockets for convenient electrical measurement, commissioning and fault finding.
What conductor sizes can the D4/8.SNNT2.I.ADO accept?
The ADO connection accepts conductors from 0.34–1.5 mm². The screw-clamp connection accepts rigid conductors from 0.2–4 mm² and flexible conductors from 0.22–4 mm².
How is the D4/8.SNNT2.I.ADO mounted?
The terminal is designed for DIN rail mounting and is compatible with TH35-7.5 and TH35-15 rails. It has a compact width of 8 mm, a height of 68.2 mm and a depth of 40.9 mm.
Trusted Circuit Isolation for Industrial Control Systems
TE Connectivity Entrelec ADO disconnect terminal blocks combine efficient conductor termination with practical isolation and testing features, providing dependable connectivity for panel builders, machine builders, automation engineers and industrial maintenance applications.
