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40ET
Fuse, Semiconductor, British BS 88, ET, 40 A, Fast Acting, 17.1mm x 48mm, 0.67" x 1.89", 500 V
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: EATON BUSSMANN
- Product type: Semiconductor Fuses
- Product Range:ET Series; Fuse Current:40A; Blow Characteristic:Fast Acting; Fuse Size Metric:17.1mm x 48mm; Fuse Size Imperial:0.67" x 1.89"; Voltage Rating V DC:500VDC; Voltage Rating VAC:690
- SVHC: No SVHC (10-Jun-2022)
- Fuse Current: 40A
- Product Range: ET
- Fuse Size Metric: 17.1mm x 48mm
- Fuse Size Imperial: 0.67" x 1.89"
- Voltage Rating VAC: 690V
- Voltage Rating VDC: 500V
- Blow Characteristic: Fast Acting
| Delivery and price | |
|---|---|
| Units per pack | 20 |
| Price | 21.59 € |
| Current stock | 50+ |
| Lead time | 30 days |
Datasheet
**High Speed Fuses**
## **British BS 88 Fuses**
## **Introduction**
|**British BS 88 Contents**<br>**Fuse**<br>**Volts**|**British BS 88 Contents**<br>**Amp**<br>**Range**|**Page**|
|---|---|---|
|240|6-900|188-190|
|690|6-710|191-194|
|**Accessories**|||
|Indicator System &|stem & Fuse Bases|195|
## **General Information**
Designed and tested to:
- BS 88: Part 4
- IEC 269: Part 4
- UL Recognized
Cooper Bussmann offers the industry’s widest range of British style semiconductor fuses and accessories.
Cooper Bussmann British style products use innovative arc quenching techniques and high grade materials to provide:
- Minimal energy let-through (I[2] t)
|**British BS 88 Fuse Ranges**|**British BS 88 Fuse Ranges**|**British BS 88 Fuse Ranges**|
|---|---|---|
|**Amps**|**Vac**|**Vdc**|
|6-900<br>6-710|240<br>690|150<br>500|
- Excellent DC performance
- Good surge withstand profile
British style fuses are typically found in equipment manufactured in the United Kingdom or British Commonwealth countries. However, North American manufacturers have begun to specify British style fuses — particularly in UPS applications at 240V or less — to take advantage of their size, performance and cost benefits.
## **Voltage Rating**
All Cooper Bussmann British style fuses are tested to IEC 269: Part 4. This standard requires a test voltage which is 5% higher than the rated voltage. In North America, fuses are required to clear only their rated voltage.
## **Accessories**
Trip-indicator fuses are available for use in parallel with the main fuse. Indicator fuses can be attached to the associated fuselink, or mounted separately in panel-mounted fuseclips. In addition, a push-on adapter and microswitch attachment are available, to provide remote indication. Fuse blocks are also available for most applications.
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**187**
**High Speed Fuses**
## **British BS 88 — 240V: 6-900A**
## **LCT, LET, LMT, LMMT**
## **Specifications**
**Description:** BS 88 style stud-mount fuses.
**Dimensions:** See dimensions illustrations.
## **Ratings:**
Volts: — 240Vac/150Vdc Amps: — 6-900A
IR: — 200kA RMS Sym.
**Agency Information:** CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. All fuses above have been tested at 318Vac. Consult Cooper Bussmann for specific UL Recognition status.
## **Electrical Characteristics**
1.6 **Total Clearing I[2] t** K 1.4 The total clearing I[2] t at rated 1.2 voltage and at power factor 1.0 of 15% are given in the electrical characteristics. For 0.8 ~~===~~ other voltages, the clearing 0.6 1) I[2] t is found by multiplying by 0.4 ~~ea~~ correction factor, K, given as 0.2 a function of applied working ~~tH~~ 2) Eg voltage, Eg, (rms). 50 100 150 200 250 1) LCT 2) LET, LMT, LMMT
## **Dimensions (mm)**
Fig. 2: LET
Fig. 1: LCT
**==> picture [249 x 268] intentionally omitted <==**
**----- Start of picture text -----**<br>
7.1<br>4<br>5.5<br>26.2 41.8 56<br>28 38 47<br>9.7<br>12.7<br>l<br>6.4 17.7<br>8.4 19.1 Fig. 4: LMMT<br>8.7<br>Fig. 3: LMT 25.4<br>1mm = 0.0394” / 1” = 25.4mm pi 25.4 gee 31 59 84<br>31 59 84<br>13.5<br>13.5 10.3<br>10.3<br>cat<br>41<br>83<br>38.1<br>Indicator (Optional) 38<br>**----- End of picture text -----**<br>
## **Arc Voltage**
|**Arc Voltage**|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|**Arc Voltage**<br>This curve gives the peak<br>arc voltage, UL, which<br>may appear across the<br>fuse during its operation<br>as a function of the<br>applied working voltage,<br>Eg, (rms) at a power factor<br>of 15%.<br>**Power Losses**<br>Watts loss at rated current<br>is given in the electrical<br>characteristics. The curve<br>allows the calculation of<br>the power losses at load|1.0<br>0.8<br>0.5<br>0.6<br>750<br>500<br>250|Kp<br>100<br>200<br>300<br>1)<br>2)<br>Eg<br>UL<br>1) LCT<br>2) LET, LMT, LMMT<br>~~nape~~<br>Anni<br>~~PERE EE~~|||||||||
|currents lower than the|0.4||||||||||
|rated current. The correc-|0.3||||||||||
|tion factor, Kp, is given as<br>a function of the RMS load<br>current, Ib, in % of the<br>rated current.<br>**Catalog Numbers**<br>**Electrical Characteristics**<br>**Rated**<br>**Catalog**<br>**Current**<br>**Numbers**<br>**Type**<br>**RMS-Amps**<br>6LCT<br>6<br>10LCT<br>10<br>12LCT<br>LCT<br>12|**I2t (A2** **Sec)**<br>**Clearing**<br>**Clearing**<br>**Watts**<br>**Pre-arc**<br>**at 120V**<br>**at 240V**<br>**Loss**<br>2<br>6<br>9<br>1.0<br>3.8<br>12<br>22<br>2.5<br>7<br>22<br>32<br>2.5<br>0.2<br>0.1<br>30<br>40<br>50<br>60<br>70<br>80<br>90 100%<br>Ib<br>~~AA~~||||||||||
|16LCT<br>16|20||||50||100||2.5||
|20LCT<br>20|25||||80||160||4.0||
|25LET<br>25|18||||120||250||4.0||
|32LET<br>32<br>35LET<br>35|32<br>50||||200<br>320||450<br>600||5.0<br>5.0||
|50LET<br>50<br>63LET<br>LET<br>63<br>80LET<br>80<br>100LET<br>100<br>125LET<br>125<br>160LET<br>160<br>180LETa<br>180<br>160LMT<br>160|100<br>180<br>300<br>600<br>600<br>1100<br>1600<br>1100||||500<br>1100<br>1900<br>3800<br>3800<br>7000<br>12000<br>7000||1400<br>2200<br>3800<br>7500<br>7500<br>16000<br>29000<br>16000||7.0<br>9.0<br>10.0<br>10.0<br>16.0<br>20.0<br>21.0<br>17.0||
|200LMT<br>200|1500||||10000||20000||28.0||
|250LMT<br>250|3200||||20000||40000||28.0||
|315LMT<br>LMT<br>315|6000||||35000||75000||35.0||
|355LMT<br>355<br>400LMT<br>400<br>450LMT<br>450<br>400LMMT<br>400<br>500LMMT<br>500<br>630LMMT<br>LMMT<br>630<br>710LMMT<br>710|8000<br>14000<br>18000<br>6000<br>14000<br>24000<br>32000||||50000<br>70000<br>100000<br>35000<br>80000<br>150000<br>200000||100000<br>160000<br>220000<br>80000<br>170000<br>300000<br>460000||35.0<br>40.0<br>42.0<br>60.0<br>64.0<br>75.0<br>77.0||
|800LMMT<br>800|52000||||300000||600000||82.0||
|900LMMT<br>900|75000||||400000||800000||97.0||
- Watts loss provided at rated current. • Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment.
- See accessories on page 195.
## **Typical Applications**
## **Features and Benefits**
- DC common bus
- Excellent cycling capability
- AC and DC drives
- Excellent DC performance
- Power converters/rectifiers
- Low arc voltage and low energy let-through (I[2] t)
- Reduced voltage starters
**Data Sheet: 720004**
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**188**
**High Speed Fuses**
## **British BS 88 — 240V: 6-900A**
## **LCT 6-20A: 240V**
## **Time-Current Curve**
## **LET 25-180A: 240V**
## **Time-Current Curve**
**==> picture [514 x 316] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4] 10 [4]<br>6 6<br>4 4<br>2 2<br>10 [3] 10 [3]<br>6 6<br>4 4<br>2 6LCT 2<br>10LCT<br>10 [2] 10 [2]<br>64 12LCT16LCT20LCT 64 80LET100LET125LET<br>2 2 160LET<br>10 [1] 10 [1] 180LETa<br>6 6<br>4 4<br>25LET<br>2 2 32LET<br>10 [0] 10 [0] 35LET<br>6 6 50LET<br>4 4 63LET<br>2 2<br>10 [–1] 10 [–1]<br>6 6<br>4 4<br>2 2<br>10 [–2] 10 [–2]<br>6 6<br>4 4<br>2 2<br>10 [–3] 10 [–3]<br>6 6<br>4 4<br>2 2<br>10 [–4]<br>2 4 6 8 10 [1] 2 4 6 8 10 [2] 2 4 6 8 103 10 [–4] 10 [1] 2 4 6 8 10 [2] 2 4 6 8 103<br>Prospective Current In Amps RMS Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
**Data Sheet: 35785296**
**Data Sheet: 35785293**
**Peak Let-Through Curve**
**==> picture [252 x 210] intentionally omitted <==**
**----- Start of picture text -----**<br>
2<br>10 [5] 900LMMT<br>6 800LMMT710LMMT<br>4 630LMMT<br>450LMT<br>400 & 500LMMT<br>2 355LMT<br>315LMT<br>10 [4] 250LMT<br>180LET<br>6 200LMT<br>4 160LET & LMT125 & 100LET<br> 80LET<br>2<br>10 [3]<br>6<br>4<br>2 63LET50LET<br>35LET<br> 10 [2] 32LET<br>25LET<br>6 20LCT16LCT<br>4 12LCT<br>10LCT<br> 6LCT<br>2<br>SYMMETRICAL FAULT<br>FULLY ASYMMETRICAL FAULT<br> 10 [1]<br>10 [1] 2 4 6 10 [2] 2 4 6 10 [3] 2 4 6 10 [4] 2 4 6 10 [5]<br>Prospective Short-Circuit Current Symmetrical RMS<br>Peak Let-Through Current<br>**----- End of picture text -----**<br>
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**189**
**High Speed Fuses**
## **British BS 88 — 240V: 6-900A**
## **LMT 160-450A: 240V**
## **Time-Current Curve**
**==> picture [252 x 336] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4]<br>6<br>4<br>2<br>10 [3]<br>6<br>4<br>2<br>160LMT<br>10 [2] 200LMT<br>6 250LMT<br>4 315LMT<br>2 355LMT<br>400LMT<br>10 [1] 450LMT<br>6<br>4<br>2<br>10 [0]<br>6<br>4<br>2<br>10 [–1]<br>6<br>4<br>2<br>10 [–2]<br>6<br>4<br>2<br>10 [–3]<br>6<br>4<br>2<br>10 [–4]<br>10 [2] 2 4 6 8 10 [3] 2 4 6 8 104<br>Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
**Data Sheet: 35785294**
## **LMMT 400-900A: 240V**
## **Time-Current Curve**
**==> picture [252 x 341] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4]<br>6<br>4<br>2<br>10 [3]<br>6<br>4<br>2<br>400LMMT<br>10 [2] 500LMMT<br>6 630LMMT<br>4 710LMMT<br>2 800LMMT<br>900LMMT<br>10 [1]<br>6<br>4<br>2<br>10 [0]<br>6<br>4<br>2<br>10 [–1]<br>6<br>4<br>2<br>10 [–2]<br>6<br>4<br>2<br>10 [–3]<br>6<br>4<br>2<br>10 [–4]<br>10 [2] 2 4 6 8 10 [3] 2 4 6 8 104<br>Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
**Data Sheet: 35785295**
**Peak Let-Through Curve**
**==> picture [252 x 213] intentionally omitted <==**
**----- Start of picture text -----**<br>
2<br>10 [5] 900LMMT<br>6 800LMMT710LMMT<br>4 630LMMT<br>450LMT<br>400 & 500LMMT<br>2 355LMT<br>315LMT<br>10 [4] 250LMT<br>180LET<br>6 200LMT<br>4 160LET & LMT125 & 100LET<br> 80LET<br>2<br>10 [3]<br>6<br>4<br>2 63LET50LET<br>35LET<br> 10 [2] 32LET<br>25LET<br>6 20LCT16LCT<br>4 12LCT<br>10LCT<br> 6LCT<br>2<br>SYMMETRICAL FAULT<br>FULLY ASYMMETRICAL FAULT<br> 10 [1]<br>10 [1] 2 4 6 10 [2] 2 4 6 10 [3] 2 4 6 10 [4] 2 4 6 10 [5]<br>Prospective Short-Circuit Current Symmetrical RMS<br>Peak Let-Through Current<br>**----- End of picture text -----**<br>
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**190**
**High Speed Fuses**
## **British BS 88 — 690V: 6-710A**
## **CT, ET, FE, EET, FEE, FM, FMM, MT, MMT**
## **Specifications**
**Description:** BS 88 style stud-mount fuses.
**Dimensions:** See dimensions illustrations.
## **Ratings:**
Volts: — 690Vac/500Vdc Amps: — 6-710A
IR: — 200kA RMS Sym.
**Agency Information:** CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. MT and MMT — 350Vdc (IEC) rating. Consult Cooper Bussmann for UL Recognition status.
## **Electrical Characteristics**
**==> picture [249 x 153] intentionally omitted <==**
**----- Start of picture text -----**<br>
Total Clearing I [2] t<br>1.6<br>The total clearing I [2] t at rated K<br>voltage and at power factor 1.4 eer<br>of 15% are given in the 1.2<br>electrical characteristics. For 1.0<br>other voltages, the clearing 0.8 | | |Lx<br>I [2] t is found by multiplying by<br>0.6 > ane<br>correction factor, K, given asa function of applied working 0.4 EZceam|<br>voltage, Eg, (rms). 0.2 [At 1) 2)<br>E<br>| | | | lt g<br>| [| [| |<br>200 300 400 500 600 690<br>1) CT, ET, EET, FE, FEE, MT, MMT<br>2) FM, FMM<br>**----- End of picture text -----**<br>
## **Arc Voltage**
**==> picture [245 x 254] intentionally omitted <==**
**----- Start of picture text -----**<br>
UL<br>This curve gives the 1500 | | ty<br>1)<br>peak arc voltage, UL,<br>which may appear<br>1000<br>across the fuse during its 2)<br>operation as a function<br>of the applied working 500<br>voltage, Eg, (rms) at a<br>power factor of 15%.<br>E<br>g<br>Power Losses annin 200 400 600 660<br>1) CT<br>Watts loss at rated 2) ET, FE, EET, FEE, FM, FMM<br>current is given in the 1.0<br>electrical characteristics. 0.8 Kp<br>The curve allows the 0.6 SSEEe<br>calculation of the power 0.5<br>losses at load currents 0.4<br>lower than the rated 0.3 seer ann<br>current. The correction<br>0.2<br>factor, Kp, is given as a fle<br>function of the RMS load<br>current, Ib, in % of the 0.1 OEE Ib<br>rated current. 30 40 50 60 70 80 90 100%<br>**----- End of picture text -----**<br>
## **Features and Benefits**
- Excellent cycling capability
- Excellent DC performance
- Low arc voltage and low energy let-through (I[2] t)
- Low watts loss
## **Typical Applications**
- DC common bus
- DC drives
- Power converters/rectifiers
- Reduced voltage starters
**==> picture [508 x 229] intentionally omitted <==**
**----- Start of picture text -----**<br>
Dimensions (mm)<br>Fig. 1: CT Fig. 2: ET, FE Fig. 3: EET, FEE Fig. 4: FM, MT Fig. 5: FMM, MMT<br>8.7<br>7.1 25.4 25.4<br>4<br>5.5<br>S j<br>en ad — te ‘ Tel<br>48 63.5 77 46 70 94 50 A 113 50 A 113<br>54.8 64.3 74.6<br>14<br>11.9<br>9.7 13.5 10.3<br>im uy 12.7 nfl 31.8 bey! =i<br>10.3<br>6.4 EE 17.1 3 7<br>8.7 8.7 19.1 19 41 83<br>vo 5 aaa > ° F<br>80) CE °° @! 3 8. 1 |<br>38<br>1mm = 0.0394” / 1” = 25.4mm Figs. 4 & 5 “A” Dimensions<br>Type “A”<br>FM 80-85mm<br>FMM 80-85mm<br>MT 85mm<br>MMT 85mm<br>**----- End of picture text -----**<br>
**Data Sheet: 720024**
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**191**
**High Speed Fuses**
## **British BS 88 — 690V: 6-710A**
## **Catalog Numbers**
## **CT 6-20, ET 25-80A: 690V**
||||**Electrical **|**Characteristics**|**Characteristics**|||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Catalog**||**Rated**<br>**Current**||**I2t (A2 Sec)**<br>**Clearing**<br>**Clearing**||**Watts**|**Time-Current**||||||||||||||**Curve**|||||||||||||||||||||||||||||||||||||||
|**Numbers**|**Type**|**RMS-Amps**|**Pre-arc**|**at 415V**|**at 660V**|**Loss**||104||||||||||||||||||||||||||||||||||||||||||||||||||||
|6CT||6|1.8|8.5|12|2||6||||||||||||||||||||||||||||||||||||||||||||||||||||
|10CT||10|7|30|48|3||4||||||||||||||||||||||||||||||||||||||||||||||||||||
|12CT|CT|12|10|40|65|3||2||||||||||||||||||||||||||||||||||||||||||||||||||||
|16CT<br>20CT||16<br>20|16<br>32|66<br>150|110<br>220|7<br>7||103<br>6||||||||||||||||||||||||||||||||||||||||||||||||||||
|25ET||25|25|150|250|7||4|||||||||||||||||||||||||||||||||||||25ET|||||||||||||||
|32ET||32|32|190|350|11||2|||||||||||||||||||||||||||||||||||||32ET|||||||||||||||
|35ET<br>40ET<br>45ET|ET|35<br>40<br>45|52<br>103<br>103|310<br>600<br>680|500<br>900<br>1100|11<br>9<br>11||6<br>4<br>102|||||||||||||||||||||||||||||||||||||56ET<br>45ET<br>40ET<br>35ET|||||||||||||||
|56ET<br>63ET<br>80ET<br>35FE<br>40FE<br>45FE<br>50FE<br>63FE<br>71FE<br>80FE|FE|56<br>63<br>80<br>35<br>40<br>45<br>50<br>63<br>71<br>80|135<br>171<br>360<br>33<br>52<br>76<br>103<br>135<br>210<br>250|950<br>1200<br>2500<br>130<br>180<br>270<br>380<br>480<br>600<br>900|1500<br>2000<br>4000<br>200<br>300<br>450<br>600<br>750<br>950<br>1500|14<br>16<br>18<br>9<br>9<br>11<br>11<br>12<br>17<br>20|Virtual Pre-Arcing Time In Seconds|2<br>6<br>4<br>100<br>2<br>6<br>4<br>101<br>2|||||||||10CT<br>12CT<br>16CT<br>20CT<br>6CT||||||||||||||||||||||||||||80ET<br>63ET|||||||||||||||
|90FE||90|360|1300|2100|20|10–1|||||||||||||||||||||||||||||||||||||||||||||||||||||
|100FE<br>90EET||100<br>90|470<br>490|1800<br>3000|2800<br>4500|23<br>19||4<br>6||||||||||||||||||||||||||||||||||||||||||||||||||||
|110EET<br>140EET|EET|110<br>140|600<br>1050|4000<br>7000|6500<br>12000|27<br>35|2<br>10–2|||||||||||||||||||||||||||||||||||||||||||||||||||||
|160EET||160|1500|10000|17000|39||6||||||||||||||||||||||||||||||||||||||||||||||||||||
|100FEE<br>120FEE||100<br>120|400<br>540|1600<br>1900|2400<br>3100|24<br>32||4<br>2||||||||||||||||||||||||||||||||||||||||||||||||||||
|140FEE<br>160FEE|FEE|140<br>160|850<br>1000|2500<br>3700|3800<br>5700|36<br>46|6<br>10–3|||||||||||||||||||||||||||||||||||||||||||||||||||||
|180FEE<br>200FEE||180<br>200|1400<br>1900|5300<br>7100|8400<br>11400|46<br>52||2<br>4||||||||||||||||||||||||||||||||||||||||||||||||||||
|180FM<br>200FM||180<br>200|1400<br>2600|7500<br>10500|13500<br>18500|40<br>40|10–4||2|||||4||||6|||8||101||||**2**|||||||4||6<br>8||102|||||**2**|||||4||||6||8|||103|||
|225FM||225|3700|14500|26500|44||||||||||||||||||||Prospective Current In Amps RMS||||||||||||||||||||||||||||||||||
|250FM|FM|250|5200|20500|37500|48||||||||||||||||||||||||||||||||||||||||||||||||||||||
|280FM||280|7000|30500|55000|48||||||||||||||||||||||||||||||||||||||||||||||||||||||
|315FM||315|10000|40000|77000|55||||||||||||||||||||||||||||||||||||||||||||||||||||||
|350FM<br>400FMM||350<br>400|15000<br>10000|60000<br>40000|105000<br>72500|55<br>85|**Peak**||||**Let-Through**|||||||||||||||**Curve**||||||||||||||||||||||||||||||||||
|450FMM<br>500FMM<br>550FMM|FMM|450<br>500<br>550|15000<br>20000<br>30000|60000<br>82000<br>120000|105000<br>150000<br>215000|90<br>100<br>100||4<br>6||||||||||||||||||||||||||||710MMT<br>630MMT<br>560MMT||||||||||||||||||||||||
|630FMM||630|45000|180000|310000|100||2||||||||||||||||||||||||||||500MMT<br>450MMT||||||||||||||||||||||||
|700FMM<br>160MT<br>180MT||700<br>160<br>180|60000<br>2400<br>3800|245000<br>15000<br>25000|420000<br>25000<br>38000|120<br>26<br>26||6<br>105|||||||||||||||||||||315MT 355MT 400MMT<br>280MT 355MMT<br>250MT 315MMT<br>280MMT<br>200MT<br>180MT 225MMT|||||||||||||||||||||||||||||||
|200MT||200|6000|40000|58000|27||4||||||||||||||||||||||||||160MT 200MMT<br>180MMT||||||||||||||||||||||||||
|250MT<br>280MT<br>315MT<br>355MT<br>180MMT<br>200MMT<br>225MMT<br>280MMT<br>315MMT<br>355MMT<br>400MMT<br>450MMT|MT<br>MMT|250<br>280<br>315<br>355<br>180<br>200<br>225<br>280<br>315<br>355<br>400<br>450|11500<br>16500<br>19000<br>22000<br>1650<br>2200<br>3700<br>6600<br>8600<br>13500<br>21000<br>30000|80000<br>100000<br>125000<br>160000<br>12000<br>16000<br>26000<br>47000<br>62000<br>97000<br>150000<br>220000|110000<br>150000<br>180000<br>200000<br>18000<br>23000<br>40000<br>70000<br>91000<br>140000<br>220000<br>320000|32<br>35<br>42<br>51<br>42<br>42<br>42<br>47<br>51<br>54<br>60<br>57|Peak Let-Through Current|2<br>6<br>4<br>2<br>6<br>4<br>2<br>103<br>104|||||||||||||||||||||||||||||||||||80ET<br>63ET<br>56ET|||||||||160EET<br>140EET<br>110EET<br>90EET||||||||
|500MMT<br>560MMT<br>630MMT<br>710MMT||500<br>560<br>630<br>710|42000<br>60000<br>68500<br>78000|300000<br>430000<br>500000<br>600000|450000<br>640000<br>720000<br>850000|64<br>64<br>86<br>105||4<br>6<br>102||||||||||||||||||||||||||20CT<br>16CT<br>12CT<br>10CT<br>6CT|||||||||45ET<br>40ET<br>35ET<br>32ET<br>25ET|||||||||||||||||
|• Watts loss provided at rated current.||||||||2||||||||||||||||||||||||||||||||||||||||||||||||||||
|• Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement<br>purposes on existing equipment.<br>• See accessories on page 195.||||||||101<br>101|||2||||4||6|||102||||2||4|||6||||103||2<br>4||6|||||104||2|||4|6|||105||||2|||||
|||||||||||||||||||||||Prospective Short-Circuit Current Symmetrical|||||||||||||||||||||RMS|||||||||||||||||
**Data Sheet: 35785312**
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**192**
**High Speed Fuses**
## **British BS 88 — 690V: 6-710A**
## **EET 90-160A, MT 160-355A: 690V**
**Time-Current Curve**
## **MMT 180-710A: 690V**
## **Time-Current Curve**
**==> picture [518 x 336] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4] 10 [4]<br>6 6<br>4 4<br>2 2<br>400MMT<br>10 [3] 10 [3] 450MMT<br>6 160MT 6 500MMT<br>4 180MT 4 560MMT<br>2 200MT250MT 2 630MMT710MMT<br>10 [2] 280MT<br>315MT 10 [2]<br>64 355MT 6<br>4<br>2<br>2 180MMT<br>10 [1] 200MMT<br>6 90EET 10 [1] 225MMT<br>4 110EET 6 280MMT<br>2 140EET160EET 4 315MMT355MMT<br>10 [0] 2<br>64 10 [0]<br>6<br>2 4<br>10 [–1] 2<br>6<br>4 10 [–1]<br>2 6<br>4<br>10 [–2]<br>6 2<br>4 10 [–2]<br>2 6<br>4<br>10 [–3]<br>6 2<br>4<br>10 [–3]<br>2<br>6<br>10 [–4] 2 4 6 8 10 [2] 2 4 6 8 10 [3] 2 4 6 8 104 4<br>Prospective Current In Amps RMS 2<br>10 [–4]<br>10 [2] 2 4 6 8 10 [3] 2 4 6 8 104<br>Data Sheet: 35785313 Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds<br>Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
**Data Sheet: 35785311**
## **Peak Let-Through Curve**
**==> picture [253 x 221] intentionally omitted <==**
**----- Start of picture text -----**<br>
6<br>4 710MMT630MMT<br>560MMT<br>2 500MMT450MMT<br>315MT 355MT 400MMT<br>280MT 355MMT<br>10 [5] 250MT 315MMT<br>280MMT<br>6 180MT 225MMT 200MT<br>4 160MT 200MMT180MMT<br>2<br>10 [4]<br>6<br>4<br>2<br>10 [3]<br>6<br>160EET<br>4 140EET<br>110EET<br>80ET 90EET<br>2 63ET<br>56ET<br>10 [2] 6 20CT16CT12CT10CT6CT 45ET40ET35ET32ET25ET<br>4<br>2<br>10 [1] 10 [1] 2 4 6 10 [2] 2 4 6 10 [3] 2 4 6 10 [4] 2 4 6 10 [5] 2<br>Prospective Short-Circuit Current Symmetrical RMS<br>Peak Let-Through Current<br>**----- End of picture text -----**<br>
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**193**
**High Speed Fuses**
## **British BS 88 — 690V: 6-710A**
## **FE 35-100A & FM 180-350A: 690V**
## **Time-Current Curve**
**==> picture [252 x 341] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4]<br>6<br>4<br>2<br>10 [3]<br>6<br>4<br>2<br>180FM<br>10 [2] 200FM<br>6 220FM<br>4 250FM<br>280FM<br>2 315FM<br>10 [1] 350FM<br>6<br>4<br>2<br>35FE<br>10 [0] 40FE<br>6 45FE<br>4 50FE<br>63FE<br>2 71FE<br>80FE<br>10 [–1] 90FE<br>6 100FE<br>4<br>2<br>10 [–2]<br>6<br>4<br>2<br>10 [–3]<br>6<br>4<br>2<br>10 [–4]<br>2 4 6 8 10 [2] 2 4 6 8 10 [3] 2 4 6 8 104<br>Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
## **FEE 100-200A & FMM 400-700A: 690V**
## **Time-Current Curve**
**==> picture [252 x 337] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [4]<br>6<br>4<br>2<br>10 [3]<br>6<br>4<br>2<br>400FMM<br>10 [2] 450FMM<br>6 500FMM<br>4 550FMM<br>630FMM<br>2 700FMM<br>10 [1]<br>6 100FEE<br>4 120FEE<br>140FEE<br>2 160FEE<br>180FEE<br>10 [0] 200FEE<br>6<br>4<br>2<br>10 [–1]<br>6<br>4<br>2<br>10 [–2]<br>6<br>4<br>2<br>10 [–3]<br>6<br>4<br>2<br>10 [–4]<br>10 [2] 2 4 6 8 10 [3] 2 4 6 8 104<br>Prospective Current In Amps RMS<br>Virtual Pre-Arcing Time In Seconds<br>**----- End of picture text -----**<br>
## **Peak Let-Through Curve**
## **Peak Let-Through Curve**
**==> picture [522 x 217] intentionally omitted <==**
**----- Start of picture text -----**<br>
10 [5] 8 700FMM<br>6 6 630FMM550FMM<br>4 500FMM<br>4 450FMM<br>2 350FM 400FMM<br>315FM<br>10 [4] 6 280FM250FM225FM200FM 2<br>4 180FM<br>2 10 [4]<br>8<br>10 [3] 6<br>6<br>4 4<br>2<br>100FE<br>90FE 2<br>10 [2] 80FE<br>71FE<br>6 63FE50FE<br>4 45FE40FE 10 [3]<br>35FE 8 200FEE<br>2 180FEE<br>6 160FEE<br>10 [1] 140FEE<br>10 [1] 2 4 6 10 [2] 2 4 6 10 [3] 2 4 6 10 [4] 2 4 6 10 [5] 2 4 120FEE<br>Prospective Short-Circuit Current Symmetrical RMS 100FEE<br>2 10 [2] 2 4 6 10 [3] 2 4 6 10 [4] 2 4 6 10 [5] 2<br>Prospective Short-Circuit Current Symmetrical RMS<br>Peak Let-Through Current<br>Peak Let-Through Current<br>**----- End of picture text -----**<br>
**Data Sheet: 35785292**
**Data Sheet: 35785314**
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**194**
**High Speed Fuses**
## **British BS 88 Fuse Accessories**
## **Indicator System**
## **Trip-Indicators**
Trip-indicators are available for use in parallel with the main fuse. They can either be attached to the associated fuse or mounted separately in panel mounted fuse clips, reference CL1. A push-on adapter and microswitch attachment is available for use with the trip indicator to give the facility of remote indication, reference MAI.
Fuse ratings of 20A and below cannot usually accommodate a trip-indicator.
When a trip-indicator is to be attached to the main fuse an accessory pack comprising a pair of mounting clips and an appropriate trip indicator would be required. The clips are snapped onto the fuse end caps and the indicator is pressed into clips as shown.
## **Electrical Specifications**
|**Electrical Specifications**|||
|---|---|---|
|**Type**|**TI500**|**TI700**|
|Maximum RMS Voltage|500|700|
|Maximum Peak Voltage|700|1000|
|g<br>Maximum DC Voltage|130|350|
|g<br>Cold Resistance(ohms)|0.3|0.45|
|Maximumpermissible steady-state current|1.5A|1.5A|
|InterruptingCapacity (RMS Symm.)|100,000|100,000|
|Pre-ArcingI2t|23|23|
||||
**Fuse Indicator Kits**
**RMS For use Kit. Ref. Details Volts with Fuse Ref.** EC-250 Fuse Mount 250 LET MC250 Indicator Kits 250 LMT & LMMT EC-600 (Includes one 660 FE, FEE & ET MC600 indicator 660 FM & FMM MC700 and two clips) 700 MT & MMT ~~SS =~~
## **CL1 Panel Mount Clips**
CL1 Panel mount fuse clips are available for mounting a trip-indicator when mounting directly on the fuse is impractical. Order part number CL1.
**==> picture [227 x 168] intentionally omitted <==**
**----- Start of picture text -----**<br>
Trip-Indicator<br>Dimensions - mm<br>—— C6 21B ne E0.8 F 6.35<br>—— A D 6.8<br>Ref. Dim. “A” (mm) RMS Volts<br>TI250 37.6 250<br>TI500 47.5 500<br>TI600 55.7 600<br>TI700 61.8 700<br>TI1100 98.4 1100<br>TI1500 120.6 1500<br>TI2000 147.5 2000<br>TI2500 198.3 2500<br>**----- End of picture text -----**<br>
## **CL1 Panel Mount Clip Dimensions - mm**
**==> picture [124 x 91] intentionally omitted <==**
**----- Start of picture text -----**<br>
6.0 8.7<br>14<br>50.8<br>B<br>|<br>**----- End of picture text -----**<br>
## **Microswitch Adapter – MAI**
We offer a microswitch, complete with adapter for securing the indicator. The microswitch is provided with double pole, single throw contacts, having both a normally open and a normally closed position. A special material has been employed in the construction of the adapter to provide reliable operation in the range of temperatures associated with standard operating conditions and during fuse operation.
## **Terminal Arrangement**
**==> picture [182 x 59] intentionally omitted <==**
**----- Start of picture text -----**<br>
NO<br>NC<br>NC<br>Tef= NO { 0<br>Dimensions in mm<br>**----- End of picture text -----**<br>
## **Microswitch and Adapter Type MAI**
|**Current Rating:**<br>AC 50/60Hz resistive load @ 250V RMS<br>AC 50/60Hz resistive load@127V RMS|4A<br>6A|
|---|---|
|DC, resistive load @ 110Vdc<br>DC,resistive load@30Vdc|0.7A DC<br>2A DC|
|**Maximum Working Voltage:**<br>Contact-to-contact (RMS)<br>Contact-to-contact(RMS)|1000V<br>1500V|
|**Maximum DC Volts:**|110V DC|
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
**195**
Updated at April 29, 2026
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