Glass tube fuses
Automotive Used in older-model cars, glass tube fuses today are found primarily in automotive accessory applications. The expansive Bussmann series line of glass fuses includes many types and sizes in addition to those listed in this catalog. Call Eaton for more product details if you have requirements which are not covered here. Appliances and consumer electronics Glass and ceramic tube fuses are often used to protect appliances and consumer electronics. As electronic equipment becomes smaller, the circuits and components become more delicate and easily damaged. Fuses are the preferred method of protection due to their accuracy, small size and reliability. Fuses are available in a wide variety of amp ratings to provide precise protection. Generally, two sizes of user-replaceable fuses are found: the 1/4" x 1-1/4" and 5x20 mm. Each is available in a variety of volt and amp ratings. Fuse types There are two basic types of fuses available for appliances and consumer electronics: fast-acting or time-delay. Any replacement fuse must match the one it's replacing. In general, fast-acting fuses are a single strand of wire or strip of metal. Time-delay fuses usually have a coiled wire, a thick element wrapped in wire, or a spring. Most electronic fuses will have the voltage and amp rating stamped on the end cap. The type of fuse can generally be visually identified. Also, owner's manuals will have the correct replacement fuse generically identified. For example: "Use a 2 amp, time-delay, 250 volt fuse.
Glass and ceramic tube fuse sizes Both glass and ceramic tube fuses vary by diameter and length. The chart below provides a visual reference for the various sizes of the Bussmann series fuse families. Images are shown to scale. Fuse selection criteria • For electronic/electrical applications, fuses must be rated at 125 V or better. • Voltage must match or exceed the fuse being replaced (125 V for household current; 12 V for auto; 24 V for heavy duty). • Fuses must match required fuse characteristic - either fast-acting or time-delay. • Amp rating must match that of the original fuse. A note on voltage rating All fuses have a voltage rating. To maintain safety, this voltage rating should not be exceeded in application, although it is acceptable to use a higher voltage rated fuse in a lower voltage application. For example: A fuse rated for 125 volts is appropriate in household (110 V) or automotive (12 V), while a fuse rated for 32 volts is appropriate for automotive (12 V), but not for household (125 V). Always replace a fuse with one of the same or higher voltage rating.
General specifications
Operating temperature: -55 °C to +125 °C (with derating)
Storage temperature: -55 °C to +125 °C
Humidity Test: MIL-STD-202G Method 103B, 85% ±2% relative humidity @ +85 ±2 °C, 72 hours
Thermal shock: MIL-STD-202G Method 107G air-to-air, -55 °C -125 °C, 100 cycles
Mechanical shock: MIL-STD-202G Method 213 A, 50 g, 11 ms
Vibration: MIL-STD-202, Method 204D, condition D, 20 g, 10 - 500 Hz
Solderability: J-STD-002, Method A1
Resistance to solder: MIL-STD-202, Method 210, +260 °C, 10 s Terminal strength: 10 N
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