Keeping heat pumps operating at peak efficiency ensures the comfort of building occupants and saves money. Consult this block diagram to identify



A 500VAC/VDC rated ceramic fuse with remarkable interrupting rating in a compact 6.3 x 32mm package, which is well suited for circuit protection in high energy applications.
- In accordance with underwriter’s Laboratories Standard UL 248-14
- Available in cartridge and axial lead form and with various lead forming dimensions.
- RoHS compliant and Lead-free
- Superior Interrupting rating of 20,000 Amperes
- Compact form factor of 6.3mm x 32mm
505 Parts
Filters
Showing 1 to 6 of 6 Total Results
Part Number | Actions | Maximum AC Voltage (V) | Nominal Melting I2T (A2sec) | Resistance (Ω) | Opening | Voltage Rating (V) | Minimum Operating Temperature (°C) | Max Operating Temperature (°C) | Agency Approvals |
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Part Number | Actions | Maximum AC Voltage (V) | Nominal Melting I2T (A2sec) | Resistance (Ω) | Opening | Voltage Rating (V) | Minimum Operating Temperature (°C) | Max Operating Temperature (°C) | Agency Approvals | |
---|---|---|---|---|---|---|---|---|---|---|
500 | 91 | 0.0167 | Fast-Acting (F) | -55 | 125 | Semko | ||||
500 | 192 | 0.0117 | Fast-Acting (F) | -55 | 125 | Semko | ||||
500 | 51 | 0.0087 | Fast-Acting (F) | 500 | -55 | 125 | TUV | |||
500 | 101 | 0.0063 | Fast-Acting (F) | 500 | -55 | 125 | TUV | |||
500 | 145 | 0.0051 | Fast-Acting (F) | 500 | -55 | 125 | TUV | |||
500 | 203 | 0.0044 | Fast-Acting (F) | 500 | -55 | 125 | TUV |
505 Applications

Heat Pumps
Highlights Section
- Uninterruptible Power Supplies (UPS)
- 3-Phase Power Supplies
Series: 505 Resources

Circuit Protection Selection Guide
Consult this guide to learn about circuit protection considerations and the solutions Littelfuse offers. Tables help match products with applications.