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1sna115539r1700 – m10/10,st,sn
TE Connectivity 1SNA115539R1700 M10/10.ST-Sn is a grey 10 mm² screw-clamp test disconnect terminal block with tinned contact blades, plug-operated isolation, a 15 A IEC current rating and a 500 V IEC voltage rating.
£6.06
Why Choose the TE Connectivity M10/10.ST-Sn Test Disconnect Terminal Block?
The TE Connectivity 1SNA115539R1700 M10/10.ST-Sn is a robust 10 mm² test disconnect terminal block designed for measurement, testing and current or voltage circuit applications in industrial control and protection systems. Part of the established ENTRELEC SNA screw terminal range, it provides a plug-operated disconnect function that allows circuits to be isolated and tested while maintaining an organised DIN rail terminal arrangement.
The M10/10.ST-Sn features tinned contact blades and is designed to operate with dedicated test plugs. Compatible plug arrangements support either make-before-break operation for current circuits or break-before-make operation for voltage circuits, providing a practical terminal solution for test and measurement installations.
Rated at 15 A and 500 V to IEC specifications, the terminal has a rated conductor cross-section of 10 mm² and supports rigid conductors up to 16 mm² and flexible conductors up to 10 mm². Its grey thermoplastic housing measures 63 × 10 × 44 mm and mounts on G32, TH35-7.5 or TH35-15 DIN rails.
Key Advantages
- Plug-operated test disconnect function enables convenient circuit isolation and measurement.
- Tinned contact blades provide the dedicated contact interface for test plug operation.
- Supports make-before-break and break-before-make test arrangements using the appropriate dedicated plug.
- 10 mm² rated cross-section accommodates substantial industrial test and measurement wiring.
- 1200 A short-time withstand current for 1 s provides robust electrical performance.
- Compatible with G32, TH35-7.5 and TH35-15 DIN rails for flexible panel installation.
Key Features
- TE Connectivity / ENTRELEC M10/10.ST-Sn.
- Test disconnect terminal block operated by plug.
- Tinned contact blades.
- 10 mm terminal spacing.
- Two clamping positions on one level.
- Screw-clamp conductor termination.
- 15 A IEC rated current.
- 500 V IEC rated voltage.
- 10 mm² rated conductor cross-section.
- IP20 protection at the main terminals.
- Grey thermoplastic insulating body.
- Designed for industrial test, measurement and protection circuits.
Safe and Practical Test Circuit Isolation
The M10/10.ST-Sn is designed for circuits where technicians need to perform electrical testing or measurement without repeatedly disturbing permanently connected conductors. Its plug-operated disconnect system provides a dedicated point for changing the circuit state, while the tinned contact blades provide the interface required by the corresponding test plug.
For current measurement circuits, a compatible green plug can provide make-before-break operation, while a compatible red plug provides break-before-make operation for voltage circuits. This specialised functionality, combined with secure screw-clamp connections and a 10 mm² rated cross-section, makes the M10/10.ST-Sn particularly useful in industrial testing, instrumentation and electrical protection assemblies.
Typical Applications
- Current transformer and measurement circuits.
- Industrial test and monitoring panels.
- Protection and control systems.
- Electrical instrumentation cabinets.
- Power distribution and switchgear control panels.
- Industrial commissioning and maintenance test circuits.
Technical Specifications
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| Number of Levels | 1 | |
|---|---|---|
| Product Series | TE SNA | |
| Connection | Screw clamp | |
| Terminal Type | Disconnect / Test | |
| Conductor Size | 10 mm² | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / ENTRELEC | |
| Series | SNA Screw | |
| Model | M10/10.ST-Sn | |
| Part number | 1SNA115539R1700 | |
| Product type | Test disconnect terminal block | |
| Disconnect method | Plug operated | |
| Contact blade | Tinned | |
| Connection technology | Screw clamp | |
| Number of clamping positions per level | 2 | |
| Number of levels | 1 | |
| Rated cross-section | 10 mm² | |
| Nominal wire size | 10 mm² / 8 AWG | |
| IEC rigid conductor capacity | 0.5–16 mm² | |
| IEC flexible conductor capacity | 0.5–10 mm² | |
| IEC rated current | 15 A | |
| CSA rated current | 10 A | |
| IEC rated voltage | 500 V | |
| CSA rated voltage | 300 V | |
| Rated short-time withstand current at 1 s | 1200 A | |
| Wire stripping length | 12 mm | |
| Recommended screwdriver | 5.5–6 mm flat blade | |
| Tightening torque | 1.2–1.4 N·m | |
| Product spacing / width | 10 mm | |
| Height | 63 mm | |
| Depth | 44 mm | |
| Dimensions (H × W × D) | 63 × 10 × 44 mm | |
| Product weight | 27 g | |
| Housing material | Thermoplastic | |
| Colour | Grey | |
| Flammability classification | UL 94 V-2 | |
| Protection rating | IP20 at main terminals | |
| Mounting type | DIN rail | |
| DIN rail compatibility | G32, TH35-7.5 and TH35-15 | |
| Operating temperature range | -55 to +110 °C | |
| Storage temperature range | -55 to +110 °C | |
| EAN | 3472591155396 | |
| Pack quantity | 20 pieces |
Frequently Asked Questions
What is the TE Connectivity 1SNA115539R1700 used for?
The 1SNA115539R1700 M10/10.ST-Sn is a test disconnect terminal block designed to provide a convenient isolation and test point in industrial current, voltage, measurement and protection circuits.
How is the M10/10.ST-Sn disconnected?
The M10/10.ST-Sn uses a plug-operated disconnect system with tinned contact blades. Dedicated test plugs can be used to change the circuit state for testing and measurement.
What are the IEC electrical ratings of the M10/10.ST-Sn?
The terminal has an IEC rated current of 15 A, a rated voltage of 500 V and a rated conductor cross-section of 10 mm².
What conductor sizes can the 1SNA115539R1700 accept?
The M10/10.ST-Sn accepts IEC rigid conductors from 0.5–16 mm² and flexible conductors from 0.5–10 mm².
Which DIN rails are compatible with the M10/10.ST-Sn?
The terminal block is designed for mounting on G32, TH35-7.5 and TH35-15 DIN rails, allowing integration into common industrial terminal assemblies.
What is the difference between make-before-break and break-before-make operation?
With the appropriate dedicated plug, make-before-break operation establishes the test connection before opening the existing path and is intended for current circuits, while break-before-make operation opens the existing path before establishing the test connection and is intended for voltage circuits.
Trusted for Industrial Test and Measurement Circuits
TE Connectivity ENTRELEC SNA test disconnect terminal blocks provide secure conductor termination and dedicated circuit testing functionality for industrial control, measurement and protection systems, helping panel builders create organised and serviceable electrical installations.
