0.3AMP is a fuse by Bussman rated at 3/10 amp.

• 250 volt fuse
• Glass fuse
• Cylindrical
• 300 mA
• Time Delay/Slow Blow
• 3AG (6.3mm x 32mm)
• Interrupt rating 35 amps
• 1 1/4 inches long (31.75mm)
• Resistance 2.046 ohms

Bussman MDL 0.3AMP slo blo fuse is used in select hot tub models and is compatible with model MDL-3-10-R.