Fuse holder
Fuse holders: fuse protection and safe disconnection in modular electrical boards.
- Formats: disconnectable bases for modular boards.
- Fuses: 10x38 and size 0, 1 and 2 solutions.
- Maintenance: easy opening for replacement and checking.
- Use: auxiliary, control and technical protection circuits.
Disconnectable fuse holders for cylindrical cartridges
Solera fuse holders house the fuse cartridge and provide its connection within electrical panels. This category lists four single-pole references for three cylindrical fuse sizes. The holder and cartridge have different roles: the holder provides the housing and contacts; the selected fuse determines the protective response. Sizes 0, 1 and 2 used here refer to the cylindrical formats in the table, not to equivalence with NH cartridges.
Format and current differences between references
| Reference | Stated size | Cylindrical fuse | Poles | Holder nominal current |
|---|---|---|---|---|
| S24FH1038DC | 0 | 10×38 mm | 1P | 32 A |
| PF1038 | 0 | 10×38 mm | 1P | 32 A |
| PF1451 | 1 | 14×51 mm | 1P | 50 A |
| PF2258 | 2 | 22×58 mm | 1P | 125 A |
Applications and selection criteria
These holders are intended for distribution panels and auxiliary or control circuits in industrial environments, mounted on a 35 mm DIN rail. S24FH1038DC and PF1038 accept the 10×38 mm format and specify one 18 mm module. Matching dimensions and current do not prove identical performance; check the markings and exact data sheet before replacing one reference with another.
Select the holder and fuse together: dimensions, current, voltage, network type, utilization category and cartridge breaking capacity must suit the circuit. Holder ratings of 32, 50 or 125 A do not require a fuse of that rating or establish conductor protection by themselves. The PF holder manual specifies 500 V AC for PF1038 and 690 V AC for PF1451 and PF2258. Check the specific conditions for S24FH1038DC; its name alone does not establish suitability for any DC application.
For maintenance, follow the specific product instructions and de-energize the circuit before working on it. The term disconnectable does not establish on-load switching capacity. Check environmental conditions and panel space as well: the data sheets specify an operating temperature of −5 to +40 °C.
Frequently asked questions
Is a fuse supplied with the holder?
The documentation reviewed identifies the holders and accepted cartridge formats, but does not confirm an included cartridge for these four references. Confirm the exact supply contents and select a fuse suited to the circuit; do not assume a particular fuse rating is included.
Can I open the holder to disconnect a circuit carrying current?
That capability must not be inferred from the term disconnectable. The reviewed manual requires removal of voltage before installation and insertion of the fuse and does not establish on-load switching. If this function is needed, verify the device’s capacity expressly for the intended current and load type.
Can I use any fuse with matching dimensions?
Dimensions are only part of selection. Also check nominal current, voltage, AC or DC use, utilization category and breaking capacity. A 10×38, 14×51 or 22×58 mm cartridge is not suitable for every circuit simply because it fits, and a holder does not make an AC fuse suitable for DC.