Phoenix Contact Fuse Clamp - 3036505
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Product Information
Full details
This guide is for electricians and automation engineers seeking reliable circuit protection and connection solutions. The Phoenix Contact ST 4-FSI/C-LED 24 terminal block offers a secure, spring-cage connection with integrated fuse functionality and status indication, simplifying wiring and enhancing system safety. A key caveat is its specific 24V DC voltage rating, limiting its use in higher voltage AC applications.
All features
| Model Part Number | 3036505 |
|---|---|
| Brand | Phoenix Contact |
Extended Product Information
FAQs
What type of fuse does the ST 4-FSI/C-LED 24 use?
This terminal block uses a C-type blade fuse.
Can I use this terminal block for AC circuits?
No, this specific model (ST 4-FSI/C-LED 24) is rated for 24V DC only and should not be used for AC circuits.
How do I know if the fuse is blown?
The integrated LED indicator will turn off if the fuse is blown. If the LED is lit, the fuse is intact and power is present.
What is the maximum wire size this terminal block can accept?
It can accept wire sizes up to 10 AWG.
Does the LED indicator require external power?
Yes, the LED indicator requires a continuous 24V DC supply through the terminal block to indicate the fuse status.
How do I connect wires without tools?
The spring-cage technology allows for tool-free wire insertion. Simply strip the wire and push it firmly into the terminal opening.
What are the dimensions of this terminal block?
The terminal block has a width of 8.2 mm and a depth of 43.5 mm.
Troubleshooting
Terminal block not making a connection
Ensure the wire is stripped to the correct length and inserted fully into the spring-cage opening. Verify the conductor is making contact with the internal clamp.
LED indicator not lighting up
Confirm that the 24V DC supply is present and active. Check that the fuse is correctly installed and intact. Ensure the LED itself is not faulty.
Fuse blows repeatedly
Check the connected circuit for a short circuit or an overload condition. The fuse is protecting the circuit as intended; the underlying issue must be resolved.
Terminal block feels loose on DIN rail
Ensure the correct type of DIN rail (NS 35/7.5 or NS 35/15) is being used. Check if the terminal block's mounting clip is fully engaged with the rail.
Pros and Cons
Pros
- Tool-free wire termination for faster installation.
- Integrated fuse and LED indicator simplify circuit protection and diagnostics.
- Secure and reliable spring-cage connection resists vibration.
- Standard DIN rail mounting ensures broad compatibility.
- Compact form factor maximizes space in control panels.
Cons
- Limited to 24V DC applications; not suitable for AC or higher DC voltages.
- Requires specific C-type blade fuses.
- LED indicator requires a continuous 24V DC supply to function.
- Spring-cage connections may require more force to insert larger gauge wires compared to screw terminals.
Setup, Compatibility & Care
Setup:
- Mounting: Slide the terminal block onto a standard NS 35/7.5 or NS 35/15 DIN rail. Ensure it is securely seated.
- Wire Insertion: Strip the wire end to the appropriate length (refer to terminal block markings or datasheet). Push the conductor firmly into the spring-cage terminal opening. The spring mechanism will secure the wire. For wire insertion, a firm push is required.
- Fuse Installation: Insert a compatible C-type blade fuse into the designated fuse holder slot.
- Connection: Connect the second terminal point as required for your circuit.
Compatibility:
- DIN Rails: Compatible with NS 35/7.5 and NS 35/15 DIN rails.
- Wire Gauges: Supports solid and stranded wires from 28 AWG to 10 AWG.
- Fuse Type: Requires C-type blade fuses.
- Voltage: Rated for 24V DC operation. Do not use with AC voltage or DC voltages significantly higher than 24V.
Care:
- Cleaning: Use a dry, soft brush to remove dust from the terminal block and fuse holder. If necessary, a slightly damp cloth can be used, ensuring the block is completely dry before applying power.
- Fuse Replacement: Ensure power is disconnected before replacing a fuse. Use only fuses of the correct rating and type.
- Inspection: Periodically inspect connections for signs of corrosion or damage, especially in harsh environments.