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SPFJ070.X
POWER FUSE, FAST ACTING, 70A, 1KVDC
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: LITTELFUSE
- Product type: Industrial & Electrical Power Fuses
- Product Range:POWR-GARD SPFJ Series; Fuse Current:70A; Voltage Rating VAC:-; Voltage Rating VDC:1kV; Fuse Size Metric:38.1mm x 146.1mm; Fuse Size Imperial:1.5" x 5 64W7435
- Fuse Current: 70A
- Product Range: POWR-GARD SPFJ Series
- Fuse Size Metric: 38.1mm x 146.1mm
- Fuse Size Imperial: 1.5" x 5.75"
- Voltage Rating VAC: -
- Voltage Rating VDC: 1kV
- Blow Characteristic: Fast Acting
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 93.06 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**POWR-GARD[®] Fuse Datasheet** ## SPFJ ~~SE~~ RIES ~~DC~~ FUSE ## 1000 V dc • 70-450 A • Full Range • Solar-Rated ## **Specifications** ## **Description** The SPFJ series is the smallest 1000 V dc 70-450 A dc Full Range fuse available in the market. The SPFJ series is manufactured in Class J case sizes are suitable for photovoltaic, DC cable protection, EV off-board charging and other dc applications. that allows for both fuse holder and busbar mounting configuration. The SPFJ meets both UL and IEC requirements. ## **Features/Benefits** - Meets UL and IEC photovoltaic standards - Small footprint reduces panel size - Flexibility of fuse holder or busbar mounting - Higher amperage solar fuses in standard sizes - UL Listed branch and feeder circuit rated - Class J case sizes for the 125-450 A ratings ## **Applications** - Inverters - Re-combiner boxes - Dc Cable Protection - EV Off-board (dc Fast) chargers ## **Recommended Fuse Holder** LFJ1000 Solar Series ## **Web Resources** **Voltage Rating** 1000 V dc 600 V ac (125-450 A) **Amperage Rating** 70, 80, 90, 100, 125, 160, 200, 250, 300, 350, 400, 450 **Interrupting Rating** Ac: 200 kAIC (125-450 A) Dc: 70-200 A: 20 kAIC 250-400 A: 10 kAIC 450 A: 20 kAIC **Time Constant ≤** 1ms **Material** Body: Melamine End Bells: Copper Alloy **Approvals** UL 248-19 Listed (File: E339112) UL 248-8, Class J (125-450 A) cULus (125-450 A) IEC 60269-6 (125-450 A) **Environmental** RoHS Compliant **Country of Origin** Mexico ## **Part Numbering System** ## **SPFJ xxx X —** **==> picture [262 x 100] intentionally omitted <==** **----- Start of picture text -----**<br> Series Mounting Options<br>Amp Code Blank = Std. Class J dimensions<br>Refer to Amp Code XL = 8.5mm slot (125 - 200A Only)<br>Column in electrical Package Quantity<br>Specifications table X = 1<br>PACKAGE CATALOG ORDERING<br>SERIES AMP<br>QUANTITY NUMBER NUMBER<br>SPFJ 70 1 SPFJ070 SPFJ070.X<br>SPFJ Pf 200 1 | SPFJ200 SPFJ200.XXL<br>**----- End of picture text -----**<br> ## **Dimensions Inches (mm)** **==> picture [197 x 91] intentionally omitted <==** **----- Start of picture text -----**<br> F E<br>job<br>|<br>A G<br>a B TT - e D y<br>C<br>**----- End of picture text -----**<br> Download technical documents: **Littelfuse.com/spfj** |DIMENSIONS IN INCHES(MM)|DIMENSIONS IN INCHES(MM)|DIMENSIONS IN INCHES(MM)| |---|---|---| |A<br>3.02 (76.5)<br>3.02 (76.5)<br>3.37 (85.7)<br>3.75 (95.3)|B<br>4.38 (111.3)<br>4.38 (111.3)<br>5.25 (133.4)<br>5.98 (152.0)|C<br>D<br>E<br>5.75 (146.1)<br>1.5 (38.1)<br>1.125 (28.3)<br>5.75 (146.1)<br>1.5 (38.1)<br>1.125 (28.3)<br>7.125 (181.0)<br>2.0 (50.8)<br>1.63 (41.3)<br>8.0 (203.2)<br>2.5 (63.5)<br>2.0 (50.8)| * SPFJ XL option = 8.5 mm (UL 248-19 approval only) Look for this logo to indicate products that are used in solar applications. Visit our website **Littelfuse.com/solar** for the latest updates on approvals, certifications, and new products. **1 of 4** © 2019 Littelfuse, Inc. Rev: 1-C-081219 Littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## SPFJ ~~SE~~ RIES ~~DC~~ FUSE ## **Ordering Information** **==> picture [505 x 216] intentionally omitted <==** **----- Start of picture text -----**<br> AMPERAGE CATALOG ORDERING AGENCY APPROVALS<br>SERIES AMP CODE UPC<br>RATING NUMBER NUMBER UL cULus*<br>SPFJ 70 070 SPFJ070 SPFJ070.X 07945879326 • —<br>SPFJ 80 080 SPFJ080 SPFJ080.X 07945879327 • —<br>SPFJ 90 090 SPFJ090 SPFJ090.X 07945879328 • —<br>SPFJ 100 100 SPFJ100 SPFJ100.X 07945879329 • —<br>SPFJ 125 125 SPFJ125 SPFJ125.X 07945894924 • •<br>SPFJ 125 125 SPFJ125L SPFJ125.XXL 07945879546 • —<br>SPFJ 160 160 SPFJ160 SPFJ160.X 07945894925 • •<br>SPFJ 160 160 SPFJ160L SPFJ160.XXL 07945879547 • —<br>SPFJ 200 200 SPFJ200 SPFJ200.X 07945894926 • •<br>SPFJ 200 200 SPFJ200L SPFJ200.XXL 07945879548 • —<br>SPFJ 250 250 SPFJ250 SPFJ250.X 07945894927 • •<br>SPFJ 300 300 SPFJ300 SPFJ300.X 07945894928 • •<br>SPFJ 350 350 SPFJ350 SPFJ350.X 07945894929 • •<br>SPFJ 400 400 SPFJ400 SPFJ400.X 07945894930 • •<br>SPFJ 450 450 SPFJ450 SPFJ450.X 07945894931 • •<br>**----- End of picture text -----**<br> * cULus approval on Class J fuse (no CSA PV standard exists) ## **Electrical Specifications** **==> picture [506 x 371] intentionally omitted <==** **----- Start of picture text -----**<br> VOLTAGE INTERRUPTING TOTAL CLEARING TOTAL CLEARING TOTAL CLEARING<br>CATALOG AMPERAGE RATING RATING I [2] T (A [2] s) 100 kA I [2] T (A [2] s) 10 kA I [2] T (A [2] s) 20 kA<br>NUMBER RATING<br>AC DC AC DC (600 Vac) (1000 Vdc) (1000 Vdc)<br>SPFJ070 70 — 1000 — 20 kA — — 5212.93<br>SPFJ080 80 — 1000 — 20 kA — — 6971.37<br>SPFJ090 90 — 1000 — 20 kA — — 10487.20<br>SPFJ100 100 — 1000 — 20 kA — — 12243.51<br>SPFJ125 125 600 1000 200 kA 20 kA 24750 17391 23529<br>SPFJ160 160 600 1000 200 kA 20 kA 60100 38771 47465<br>SPFJ200 200 600 1000 200 kA 20 kA 108000 66151 79642<br>SPFJ250 250 600 1000 200 kA 10 kA 85900 55897 —<br>SPFJ300 300 600 1000 200 kA 10 kA 143000 91129 —<br>SPFJ350 350 600 1000 200 kA 10 kA 232000 170863 —<br>SPFJ400 400 600 1000 200 kA 10 kA 400500 287094 —<br>SPFJ450 450 600 1000 200 kA 20 kA 565333 401687 400916<br>NOM COLD MELTING MELTING WATTS LOSS WATTS LOSS WATTS LOSS<br>CATALOG AMPERAGE<br>RESISTANCE I [2] t (10 kA) I [2] t (20 kA) AT 100% RATED AT 80% RATED AT 70% RATED<br>NUMBER RATING<br>(mΩ) (1000 Vdc) (1000 Vdc) CURRENT (W) CURRENT (W) CURRENT (W)<br>SPFJ070 70 1.930 — 1772.73 12.56 7.17 5.30<br>SPFJ080 80 1.700 — 2345.80 15.32 8.62 6.18<br>SPFJ090 90 1.436 — 3837.24 14.83 8.31 6.10<br>SPFJ100 100 1.243 — 4693.13 18.01 9.98 7.19<br>SPFJ125 125 0.964 6863 5824 23.00 12.60 9.04<br>SPFJ160 160 0.613 19053 19368 22.77 12.67 9.15<br>SPFJ200 200 0.460 34053 32502 27.40 15.09 10.87<br>SPFJ250 250 0.485 31022 N/A 49.17 26.20 20.59<br>SPFJ300 300 0.367 59201 N/A 52.90 28.32 20.02<br>SPFJ350 350 0.285 109799 N/A 54.48 29.31 20.99<br>SPFJ400 400 0.236 198654 N/A 58.40 31.47 22.21<br>SPFJ450 450 0.187 317627 201877 50.55 28.68 20.79<br>**----- End of picture text -----**<br> **2 of 4** © 2019 Littelfuse, Inc. Rev: 1-C-081219 Littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## SPFJ ~~SE~~ RIES ~~DC~~ FUSE ## **Electrical Specification – Agency Requirements** **==> picture [505 x 160] intentionally omitted <==** **----- Start of picture text -----**<br> OPENING TIME (MINUTES)<br>CATALOG<br>NUMBER AMPERAGE 100% of Amp 113% of Amp 135% of Amp 145% of Amp 200% of Amp<br>Rating per UL Rating per IEC Rating per UL Rating per IEC Rating per UL<br>SPFJ070 70<br>SPFJ080 80 — — 8 Max<br>SPFJ090 90<br>SPFJ100 100<br>SPFJ125 125 120 Min 120 Max<br>SPFJ160 160 Temperature 10 Max<br>120 Max<br>SPFJ200 200 Stabilization<br>SPFJ250 250<br>180 Min 180 Max<br>SPFJ300 300<br>12 Max<br>SPFJ350 350<br>SPFJ400 400<br>SPFJ450 450 240 Min 240 Max 14 Max<br>**----- End of picture text -----**<br> ## **Recommended Torque Values For Buss Bar Mounting** **==> picture [505 x 169] intentionally omitted <==** **----- Start of picture text -----**<br> RECOMMENDED TORQUE VALUES FOR BUSS BAR MOUNTING FUSE<br>CATALOG NUMBER FUSE TORQUE–METRIC (STANDARD) HARDWARE SIZE–METRIC (STANDARD)*<br>SPFJ070 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) / 8mm ( [5] /16 -18)<br>SPFJ080 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) / 8mm ( [5] /16 -18)<br>SPFJ090 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) / 8mm ( [5] /16 -18)<br>SPFJ100 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) / 8mm ( [5] /16 -18)<br>SPFJ125 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) [†]<br>SPFJ160 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) [†]<br>SPFJ200 7.3 N•m (65 in-lb) 6mm ( [1] /4 -20) [†]<br>SPFJ250 19.2 N•m (170 in-lb) 10mm ( [3] /8 -16)<br>SPFJ300 19.2 N•m (170 in-lb) 10mm ( [3] /8 -16)<br>SPFJ350 19.2 N•m (170 in-lb) 10mm ( [3] /8 -16)<br>SPFJ400 19.2 N•m (170 in-lb) 10mm ( [3] /8 -16)<br>SPFJ450 19.2 N•m (170 in-lb) 12mm ( [7] /16 -14)<br>* Recommended minimum hardware grade 2 or class 5.8<br>† 8mm (5/16 -18) for L dimension option<br>**----- End of picture text -----**<br> ## **Temperature Rerating Curve (Temperature of Air Immediately Surrounding Fuse)** **==> picture [301 x 217] intentionally omitted <==** **----- Start of picture text -----**<br> 60<br>40<br>20<br>0 0<br>20<br>40<br>60<br>-60˚ C -40˚ C -20˚ C 0˚ C 20˚ C 40˚ C 60˚ C 80˚ C 100˚ C 120˚ C 140˚ C<br>-76˚ F -40˚ F -4˚ F -32˚ F 68˚ F 104˚ F 140˚ F 176˚ F 212˚ F 248˚ F 284˚ F<br>AMBIENT TEMPERATURE<br>PERCENT OF UPRATING<br>PERCENT OF DOWNRATING<br>**----- End of picture text -----**<br> **3 of 4** © 2019 Littelfuse, Inc. Rev: 1-C-081219 Littelfuse.com **POWR-GARD[®] Fuse Datasheet** **==> picture [93 x 32] intentionally omitted <==** ## SPFJ ~~SE~~ RIES ~~DC~~ FUSE ## **Time Current Curve** **==> picture [233 x 267] intentionally omitted <==** **----- Start of picture text -----**<br> 1000 900 800 700 1000 900 800 700<br>600 600<br>500 500<br>400 400<br>300 450A 300<br>200 400A 200<br>350A<br>100 90 80 70 60 300A 250A 100 90 80 70 60<br>50 200A 50<br>40 40<br>30 160A 30<br>20 125A 20<br>100A<br>10 9 8 7 6 90A80A 10 9 8 7 6<br>5 4 70A 5 4<br>3 3<br>2 2<br>0.9 0.8 0.7 1 1 0.9 0.8 0.7<br>0.6 0.6<br>0.5 0.5<br>0.4 0.4<br>0.3 0.3<br>0.2 0.2<br>0.09 0.08 0.07 0.1 0.1 0.09 0.08 0.07<br>0.06 0.06<br>0.05 0.05<br>0.04 0.04<br>0.03 0.03<br>0.02 0.02<br>0.01 0.01<br>CURRENT IN AMPERES<br>10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000<br>TIME IN SECONDS<br>10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000<br>**----- End of picture text -----**<br> ## **Peak Let-Thru Curve (125-450 A)** **==> picture [261 x 274] intentionally omitted <==** **----- Start of picture text -----**<br> 1000000<br>100000 450A<br>400A<br>350A<br>300A<br>250A<br>200A 200A<br>160A 160A<br>125A125A<br>10000<br>1000<br>100<br>100 1000 10000 100000 1000000<br>*Tested at 600 Vac AVAILABLE FAULT CURRENT<br>SYMMETRICAL R.M.S. AMPERES<br>PEAK LET- THRU IN AMPERES<br>**----- End of picture text -----**<br> **Disclaimer Notice -** Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at **www.littelfuse.com/product-disclaimer.** **4 of 4** © 2019 Littelfuse, Inc. Rev: 1-C-081219 Littelfuse.com
Updated at April 17, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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