

The 459 Series Very Fast-Acting SMF is based on Littelfuse PICO® fuse through-hole technology, though offered in a surface mount package.
This series of devices meets the requirements of the RoHS directive.
This series of devices meets the requirements of the RoHS directive.
- Very Fast-Acting
- Wide current rating range: 62mA to 5A
- Wide operating temperature range
- Low temperature rerating
- RoHS compliant
459 Parts
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Showing 1 to 12 of 15 Total Results
Part Number | Actions | Maximum AC Voltage (V) | Voltage Rating (V) | Vibration | Nominal Melting I2T (A2sec) | Resistance (Ω) | Body | MSL | Opening | Operating Temperature | Agency Approvals |
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Part Number | Actions | Maximum AC Voltage (V) | Voltage Rating (V) | Vibration | Nominal Melting I2T (A2sec) | Resistance (Ω) | Body | MSL | Opening | Operating Temperature | Agency Approvals | |
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125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.000075 | 7 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.00163 | 1.7 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.895 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | ||||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.0106 | 0.665 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.0254 | 0.395 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.0546 | 0.302 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.155 | 0.175 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.65 | 0.0816 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR / METI | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.721 | 0.035 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR / METI | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 1.65 | 0.0233 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR / METI | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.281 | 0.128 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR / METI | |||
125 | 125 | MIL-STD-202 Method 201 (10v55 Hz .06 in. total excursion) | 0.421 | 0.0468 | Ceramic | MIL-STD-202 Method 106 High Humidity (90-98 RH) Heat (65&). | Very Fast-Acting (FF) | -55° to 125°C | UR / METI |
459 Applications
- Wireless basestation
- Network equipment
- Telecom equipment
Series: 459 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.