JTD300 - 300 Amp Fuse Description
JTD300 - 300 Amp Fuse
The JTD300 is a 300A Class J time-delay fuse designed around a specific combination of electrical ratings, opening characteristics, and knife-blade construction. It belongs to the JTD Series and POWR-PRO Fuse family, with Slo-Blo/Time Lag (T)/Time Delay operation and maximum voltage ratings of 600VAC and 500VDC. If you're replacing an existing JTD300, don't stop at the 300-amp rating: matching the Class J designation, time-delay operation, voltage and interrupting requirements, physical construction, and mounting arrangement is just as important.
Key Features and Benefits
- 300A continuous current rating for equipment requiring a 300-amp fuse
- Class J fuse configuration
- Time-delay operation specified as Slo-Blo/Time Lag (T)/Time Delay
- Maximum 600VAC rating
- Maximum 500VDC rating
- Knife-blade construction provides a clear physical characteristic to check when matching a replacement
- Part of the JTD Series
- Identified as a POWR-PRO Fuse family product
- Non-indicating configuration
- Designed for mounting using a fuse block, clip, or holder
- LFJ60400 Series is the specified holder family
Technical Specifications
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Catalog Number: JTD300
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Series: JTD
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Manufacturer Description: FUS 600V T/D CLASS J 300A
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Product Type: Class J Time-Delay Fuse
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Continuous Current Rating: 300A
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Maximum AC Voltage: 600VAC
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Maximum DC Voltage: 500VDC
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AC Interrupting Value 1: 200,000A at 600VAC
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AC Interrupting Value 2: 300,000A at 600VAC
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DC Interrupting Rating: 20,000A at 500VDC
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Published Interrupting Rating: 20 kA at 500VDC
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Opening Characteristic: Slo-Blo / Time Lag (T) / Time Delay
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Fuse Class: Class J
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Family Style: POWR-PRO Fuse
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Construction / Size: Knife-Blade
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Indicating: No
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Mounting Method: Fuse Block / Clip / Holder
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Specified Holder Series: LFJ60400 Series
Material Compliance and Certifications
The supplied product information confirms the JTD300's Class J designation, 300A continuous current rating, AC and DC voltage ratings, time-delay opening characteristic, interrupting values, knife-blade construction, and mounting details.
Where It Works Best
The JTD300 suits electrical equipment that requires a 300A Class J time-delay fuse with matching electrical and physical specifications. For AC service, verify the equipment requirements against the 600VAC maximum rating and the applicable manufacturer-supplied AC interrupting value. For DC service, check the 500VDC maximum rating and 20 kA interrupting rating at 500VDC.
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Specifications
- Width:2.0
- Depth:2.0
- Height:7.125
- Amperes:300
- A.I.C. Rating & Volts:200 kA @ 600 V.AC
- Type:JTD
- Additional Notes:Knife-Blade Style, Non-Indicating, Time-Delay, current-limiting Class J Fuse
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