Subject: SPF 25A and 30A Product Update. Date: May 1, 2017

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1 W. Higgins Road Suite 0 Chicago, IL www. Subject: SPF A and A Product Update Document# LFPCN_PG00 Date: May, This letter is to inform Littelfuse Sales, Sales Support & our valued Customers of updates to our SPF A and A fuses. These two ratings have been updated to meet a higher amperage interrupt rating and to demonstrate compliance to IEC photovoltaic requirements. Going forward the products have proven capable of interrupting currents up to,000 amps (up from the,000 amp rating the product previously held). The fuses have also been shown through testing to meet all IEC - photovoltaic requirements. Part numbers are: 0SPF0.T 0SPF0.H 0SPF0.T 0SPF0.H 0SPF0.HXR 0SPF0.HXR There have been no significant changes to form, fit, or function of the product. The fuses meet all published Underwriters Laboratory and IEC solar standards. Published product literature will be updated in June to reflect these updates and at that time the fuses will be able to be considered IEC - compliant and able to interrupt DC currents up to ka. Thank you for your continued business. Craig Greeson Product Manager Industrial Business Unit Littelfuse, Inc. Tel:

2 POWR-GARD Fuse Datasheet Vdc - A Specifications Voltage Rating VDC Amperage Rating,,,.,,,,,,,,,, Max. Interrupting Rating ka - A - A ka - A - A Time Constant ms Material Body: Melamine Caps: Copper Alloy Approvals UL - Listed (File: E) IEC - (- A) VDE Certified (No. 0)* see specifications on pg. CSA Certified (File: 0_0_000) Environmental RoHS Compliant Country of Origin Mexico Description The SPF Solar Protection Fuse series has been specifically designed for the protection of photovoltaic (PV) systems. This family of Midget style fuses ( x mm) can safely protect PV modules and conductors from reverseovercurrent conditions. As PV systems have grown in size, so have the corresponding voltage requirements. This increase in system voltage has typically been intended to minimize power loss associated with long conductor runs. Standard circuit protection devices are not designed to completely protect photovoltaic panels. However, the SPF series is UL Listed to safely interrupt faulted circuits up to this demanding voltage level. Littelfuse offers ampere ratings to match specific requirements in a variety of applications. Features/Benefits Meets UL, IEC and VDE photovoltaic standards UL - Listed Vdc maximum - A ratings available,000 A Interrupting Rating - A - A,000 A Interrupting Rating - A - A Both PCB mount and dead-front holder options available Applications Inverters Combiner boxes Battery charge controllers Recommended Fuse Holders LPHV Vdc POWR-Safe Series Web Resources Download technical documents: /spf Part Numbering System Series Amp Code SERIES AMP PACKAGE QUANTITY Dimensions Inches (mm) *Only certain amperages MOUNTING METHOD CATALOG ORDERING SPF FERRULE SPF00 0SPF00.T SPF. FERRULE SPF0. 0SPF0.T SPF PCB TABS SPF0R 0SPF0.HXR Ferrule Version. (.) (.) + -. () 0SPF xxxx H XR. (.). (.) Mounting Options Blank = Ferrule XR = PCB Package Quantity T = Fuses H = Fuses PCB Version.0 (.)..0 (.) (.). (.). (.0).. (.0) (.). ().0 (.0) MOUNTING HOLE DETAIL Look for this logo to indicate products that are used in solar applications. Visit our website /solar for the latest updates on approvals, certifications, and new products. of Littelfuse POWR-GARD Products Rev:-H-0

3 POWR-GARD Fuse Datasheet Electrical Specifications Ferrule Version AMPERAGE AMP CODE ORDERING FUSE LABEL ID UPC VOLTAGE INTERRUPTING RATING (ka) NOM COLD RESISTANCE (ohm) AT % AT % CLEARING I t (A s) ka CLEARING I t (A s) ka CLEARING I t (A s) ka AGENCY APPROVALS DC DC UL VDE CSA 00. 0SPF00.T SPF A SPF00.T SPF A SPF00.T SPF A SPF0.T SPF -/A SPF00.T SPF A SPF00.T SPF A SPF00.T SPF A SPF00.T SPF A SPF0.T SPF A SPF0.T SPF A SPF0.T SPF A SPF0.T SPF A SPF0.T SPF A SPF0.T SPF A Electrical Specifications PCB Version AMPERAGE AMP CODE ORDERING FUSE LABEL ID UPC VOLTAGE INTERRUPTING RATING (ka) NOM COLD RESISTANCE (ohm) AT % AT % CLEARING I t (A s) ka CLEARING I t (A s) ka CLEARING I t (A s) ka AGENCY APPROVALS DC DC UL CSA 00. 0SPF00.HXR SPF A-R SPF00.HXR SPF A-R SPF00.HXR SPF A-R SPF0.HXR SPF -/A-R SPF00.HXR SPF A-R SPF00.HXR SPF A-R SPF00.HXR SPF A-R SPF00.HXR SPF A-R SPF0.HXR SPF A-R SPF0.HXR SPF A-R SPF0.HXR SPF A-R SPF0.HXR SPF A-R SPF0.HXR SPF A-R SPF0.HXR SPF A-R of Littelfuse POWR-GARD Products Rev:-H-0

4 POWR-GARD Fuse Datasheet Electrical Specification Agency Requirements AMPERAGE RATING % of Amp Rating per UL % of Amp Rating per IEC OPENING TIME (MINUTES) % of Amp Rating per UL % of Amp Rating per IEC 0% of Amp Rating per UL - Temperature Stabilization Min Max Max Max Temperature Derating Curve (Temperature of Air Immediately Surrounding Fuse) PERCENT OF UPRATING 0 0 PERCENT OF DOWNRATING - C - C - C 0 C C C C C C C C - F - F - F F F F F F F F F AMBIENT TEMPERATURE Recommended Process Parameters Soldering Parameters WAVE PARAMETER PREHEAT: TEMPERATURE MINIMUM: LEAD FREE RECOMMENDATION (Typical Industry Recommendation) C TEMPERATURE MAXIMUM: PRE-HEAT TIME SOLDER POT TEMPERATURE SOLDER DWELL TIME COMPLETE CYCLE TIME Seconds Maximum C Maximum C for Seconds Maximum Seconds Maximum of Littelfuse POWR-GARD Products Rev:-H-0

5 POWR-GARD Fuse Datasheet Time Current Curve (- A) A - A - A -.A - A - A - A - A - A - A TIME IN SECONDS CURRENT IN AMPERES Time Current Curve (- A) TEST VOLTAGE: V TIME CONSTANT/POWER FACTOR: FUSE CATALOG : BASIS FOR DATA: SPF A - A LITTELFUSE, INC. CHICAGO, IL. USA TIME CURRENT CHARACTERISTIC CURVES - THIS DATA GENE IN EXCEL - DRAWN BY: LLL DATE: // REVISION: D DRAWING NO.: SHEET FCC0-SPF OF TIME IN SECONDS - A - A CURRENT IN AMPERES TEST VOLTAGE: V TIME CONSTANT/POWER FACTOR: FUSE CATALOG : BASIS FOR DATA: SPF A - A of LITTELFUSE, INC. CHICAGO, IL. USA DRAWN BY: LLL DATE: // REVISION: E DRAWING NO.: SHEET OF Littelfuse POWR-GARD Products Rev:-H-0

6 POWR-GARD Fuse Datasheet Time Current Curve (- A) TIME IN SECONDS - A - A CURRENT IN AMPERES TEST VOLTAGE: V TIME CONSTANT/POWER FACTOR: FUSE CATALOG : BASIS FOR DATA: LITTELFUSE, INC. CHICAGO, IL. USA TIME CURRENT CHARACTERISTIC CURVES SPF A - A DRAWN BY: LLL DATE: // REVISION: E DRAWING NO.: SHEET OF FCC0-SPF - THIS DATA GENE IN EXCEL - of Littelfuse POWR-GARD Products Rev:-H-0

7 LFPCN_PG00 Affected Parts List Material 0SPF0.T 0SPF0.H 0SPF0.T 0SPF0.H 0SPF0.HXR 0SPF0.HXR