MFH8155FF CH

## Product Data Sheet 

## Fuse Holder, Modular Bolt-down 

## MFH8xx5FF 

Replace “XX” with 06 or 15 for Voltage Designation FF Add suffix“CH” for snap-on hinged cover (MFH8xx5FF CH) Sold in a pair 

## Wire Range 

- For use with Listed lugs or flexible bus bar 

## Electrical Ratings 

- 800 Amps 

- Voltage 

   - 600 volts (with MFH6065FF) 

   - 1500 Volts (with MFH8155FF) 

- SC withstand 200kA (600V), 10kA (1500V) 

- Factory & field wiring 

## Agency Compliance 

- UL Recognized fuse holder,  evaluated to UL 4248-1, file no. IZLT2.E35113 

- cURus - investigated to CSA C22.2 No 4248.1-07 

## Material Information 

- Insulator base: 

   - Thermoplastic 

   - Flammability rating of insulator base UL94 V-0 

   - Insulator base temperature rating: -40°C to 125°C (UL RTI) 

- Connector - Al, tin plated 

- Bolt - grade 5 Steel, zinc plated 

- Flat washer - Steel, zinc plated 

- Bellville washer -  Steel, zinc plated 

- RoHS compliant 

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## Product Data Sheet 

## Catalog Number Information 

|Catalog #|Voltage<br>Rating|Suitable Fuse Types|Amperage<br>Rating|Withstand Rat-<br>ingkA|Fuse, Line, Load<br>Terminal Stud Size|
|---|---|---|---|---|---|
|MFH8065FF|600V|Class J|401 - 600A<br>601 - 800A|200kA|1/2” Stud|
|||Class T||||
|||Specialty/Semi-Conduc-<br>tor/High-Speed|800A Max|Note 1||
|||Class L||||
|MFH8155FF|1500V|Specialty/Semi-Conduc-<br>tor/High-Speed|800A Max|10kA||



- Add “CH” behind above part numbers for covers installed 

- Note 1: To be evaluated in the end use application. Tested Let-Through Values Ip (A) = 75kA, I[2] t (A[2] s) = 4,000kA 

## Termination Specifications 

|Line/Load Side|Termination<br>Type|Torque (Lug)|Torque<br>(Flexible bus bar*)|Maximum<br>LugWidth|
|---|---|---|---|---|
||Listed lugs or flex-<br>ible bus bar on 1/2”<br>fasteners|56.5 N·m<br>(500 lbf·in)|56.5 N·m<br>(500 lbf·in)|50.8 mm<br>(2.00”)|



- For use with conductors prepared with listed connectors such as single hole compression/crimp lugs. 

- Conductor size, ampacity, temperature rating and type are dictated by the ratings of the listed lugs utilized and applicable code requirements. 

- Suitability for use with rigid bus bar or other conductors or wire connectors to be determined in the end-use application. 

*Tested with Erico Flexibar 10 x 50 x 1 

## Installation & Accessories 

- Mounting: 

   - # 10 fastener. Recommended torque of 25 - 30 lbf-in. 

- Cover : Clear thermoplastic - CH MFH8 

www.marathonsp.com 

PDS 0491 REV-D  5/22/18 

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## Product Data Sheet 

## Drawing & Reference Fuse Data 

|Fuse Information1|Fuse Information1|Fuse Information1|Fuse Information1|Dimensional Information|Dimensional Information|Dimensional Information|
|---|---|---|---|---|---|---|
|Fuse<br>Class|Voltage<br>Rating|Amperage Rat-<br>ing|Catalog #|“A”<br>Mounting Dis-<br>tance|“B”<br>Overall<br>Length|“C”<br>Mtg. Hole Dis-<br>tance|
|FWH|500|700 - 800|MFH8065xx|4.21”|10.31”|9.71”|
|J|600|450 - 600|MFH8065xx|6.00”|12.10”|11.50”|
|T|600|601 - 800|MFH8065xx|3.17”|9.27”|8.67”|
|T|300|601 - 800|MFH8065xx|2.22”|8.32”|7.72”|
|A50AQS|500|700 - 800|MFH8065xx|4.22”|10.32”|9.72”|
|FWP|700|700 - 800|MFH8155xx|5.31”|11.412”|10.812”|
|FWP|700|450 - 600|MFH8155xx|4.96”|11.055”|10.455”|
|A70QS|700|450 - 600|MFH8155xx|4.85”|10.95”|10.35”|
|A70QS|700|700 - 800|MFH8155xx|5.10”|11.20”|10.60”|
|A100P|1000|500 - 600|MFH8155xx|5.72”|11.82”|11.22”|
|A150X|1500|400 - 600|MFH8155xx|8.19”|14.29”|13.69”|
|L|600|200 - 800|MFH8065|6.75”|12.85”|12.25”|
|1Not limited to fuses above. Fuses can be evaluated in end use.|||||||



1 Not limited to fuses above. Fuses can be evaluated in end use. 

www.marathonsp.com 

PDS 0491 REV-D  5/22/18 

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