Littelfuse.com/PSR
© 2024 Littelfuse, Inc.
Rev: 021524
1 of 20
POWR-SPEED
®
Fuse
PSR SERIES HIGH-SPEED SQUARE BODY
Specications
Voltage Rating Ac: 450 V–1300 V
Dc: 450 V–1000 V
Amperage Rating 40 A–2250 A
Interrupting Rating Ac: 100 kA–200 kA
Dc: 150 kA
Time Constant 10 ms at IR
Microswitch Yes
Mounting Bolted blade style
Material Body: ceramic
Contacts: plated copper
Approvals cURus Recognized (File: E71611)
Applicable Standards UL 248-13 IEC 60269-4 (Class aR)
Environmental RoHS Compliant, REACH
Operating Temperature -55 °C to +125 °C
Storage Temperature Up to +35 °C with relative humidity <65 %
Country of Origin Mexico
Description
Littelfuse PSR series high-speed square body fuses are
specially designed for protection of power semiconductor
devices such as diodes, triacs, IGBTs, SCRs, MOSFETs,
and other solid-state devices that are typically designed
into power conversion and power conditioning equipment.
Variable frequency drives, inverters, UPS, rectifiers, and
soft-starters are examples of typical equipment designed
with sensitive power semiconductor devices that cannot
withstand any line surge or overcurrent conditions and
require high-speed protection.
The PSR series with bolted blades is designed and tested
to IEC 60269-4.
Littelfuse POWR-SPEE D
®
PSR series products offer
optimized circuit protection at the extremely fast speed
required to protect modern day power conversion devices.
Available in bolted blade style termination (typical in North
American market) with visual blown fuse indication standard
on all fuses and optional micro-switch for external indication.
Features/Benets

Best in class dc performance

Extremely current limiting

Superior cycling capability

Visual and optional microswitch fuse blown indication

Low watt-loss design

Compliance with US and Canadian requirements

Fast-acting Class aR performance
Applications

Power conversion devices (UPS, inverter,
rectiers, drives)

Dc systems (dc common bus, dc injection braking)

Battery protection application (energy storage systems)

Electric vehicle charging stations

Heaters and power supplies
Semiconductor Fuses • Bolted Blade • 40 A—2250 A
Ordering Part Number
PSR 030 US 0550 Z
Termination
US = bolted short blade
UL = bolted long blade
Case Size
30, 31, 32, 33, 70, 71, 72, 73
Amperage
Series
Packing Quantity
X = (1 pc/box)
Z = (3 pcs/box)
SERIES
CASE
SIZE
TERMINATION AMPERAGE
CATALOG
NUMBER
ORDERING PART
NUMBER
PSR 030 US 0550 PSR030US0550 PSR030US0550Z
Catalog Number
Recommended Accessories
Microswitch: MS3H1000C (Case Size 30 to 33)
MS7H1500C (Case Size 70 to 73)
Fuseblock: LSCR series
Web Resources
Download technical documents: Littelfuse.com/PSR
Note: high-speed fuses are designed for xed installations. They are
not intended for use in moving vehicle applications.
Littelfuse.com/PSR
© 2024 Littelfuse, Inc.
Rev: 021524
2 of 20
POWR-SPEED
®
Fuse
PSR SERIES HIGH-SPEED SQUARE BODY
Electrical Characteristics
CASE
SIZE
CATALOG NUMBER
AMPERE
RATING (A)
VOLTAGE
RATING (V)
INTERRUPTING
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
S)
TOTAL CLEARING
I
2
T (A
2
S) AT
RATED VOLTAGE
WATT LOSS
AT 100 %
RATED
CURRENT
(W)
AGENCY
CERTIFICATION
BOLTED SHORT
BLADE (US)
BOLTED LONG
BLADE (UL)
AC
DC AC DC AC DC cURus
IEC UL
30
PSR030US0040 PSR030UL0040 40 690 700 600 200 kA 150 kA 76 280 260 13
•
PSR030US0050 PSR030UL0050 50 690 700 600 200 kA 150 kA 110 598 384 16 •
PSR030US0063 PSR030UL0063 63 690 700 600 200 kA 150 kA 176 1023 640 20 •
PSR030US0080 PSR030UL0080 80 690 700 600 200 kA 150 k A 304 1728 1252 24 •
PSR030US0100 PSR030UL0100 100 690 700 600 200 kA 150 kA 437 2835 1575 28 •
PSR030US0125 PSR030UL0125 125 690 700 600 200 kA 150 k A 707 4684 2783 37 •
PSR030US0160 PSR030UL0160 160 690 700 600 200 kA 150 kA 1359 9114 5507 40 •
PSR030US0200 PSR030UL0200 200 690 700 600 200 kA 150 kA 3012 15169 14700 40 •
PSR030US0250 PSR030UL0250 250 690 700 600 200 kA 150 kA 4668 29952 20833 52 •
PSR030US0315 PSR030UL0315 315 690 700 600 200 kA 150 k A 7131 61830 31600 64 •
PSR030US0350 PSR030UL0350 350 690 700 600 200 kA 150 k A 12007 85320 49273 66 •
PSR030US0400 PSR030UL0400 400 690 700 600 200 kA 150 kA 16209 114750 63367 78 •
PSR030US0450 PSR030UL0450 450 690 700 600 200 kA 150 kA 23133 160110 93533 80 •
PSR030US0500 PSR030UL0500 500 690 700 600 200 kA 150 kA 31429 225180 137333 84 •
PSR030US0550 PSR030UL0550 550 690 700 600 200 kA 150 kA 44323 268920 145400 85 •
PSR030US0630 PSR030UL0630 630 690 700 550 200 kA 150 kA 57404 480010 267800 91 •
31
PSR031US0200 PSR031UL0200 200 690 700 600 200 kA 150 kA 1965 17334 16188 49 •
PSR031US0250 PSR031UL0250 250 690 700 600 200 kA 150 k A 3789 35343 21080 52 •
PSR031US0315 PSR031UL0315 315 690 700 600 200 kA 150 kA 6862 59130 30694 63 •
PSR031US0350 PSR031UL0350 350 690 700 600 200 kA 150 kA 9523 76140 40996 67 •
PSR031US0400 PSR031UL0400 400 690 700 600 200 kA 150 k A 14770 124335 64359 70 •
PSR031US0450 PSR031UL0450 450 690 700 600 200 kA 150 kA 22457 178200 97444 70 •
PSR031US0500 PSR031UL0500 500 690 700 600 200 kA 150 k A 29751 251505 125935 74 •
PSR031US0550 PSR031UL0550 550 690 700 600 200 kA 150 kA 42056 289170 171845 86 •
PSR031US0630 PSR031UL0630 630 690 700 600 200 kA 150 kA 73513 507465 276315 87 •
PSR031US0700 PSR031UL0700 700 690 700 600 200 kA 150 kA 98187 601425 337260 93 •
PSR031US0800 PSR031UL0800 800 690 700 600 200 kA 150 kA 137208 848880 502815 107 •
PSR031US0900 PSR031UL0900 900 550 600 550 200 kA 150 kA 155163 945100 631820 126 •
32
PSR032US0400 PSR032UL0400 400 690 700 600 200 kA 150 kA 11104 79650 44533 87 •
PSR032US0450 PSR032UL0450 450 690 700 600 200 kA 150 kA 15535 116100 65463 88 •
PSR032US0500 PSR032UL0500 500 690 700 600 200 kA 150 kA 21573 161460 88277 94 •
PSR032US0550 PSR032UL0550 550 690 700 600 200 kA 150 kA 26327 177660 107960 106 •
PSR032US0630 PSR032UL0630 630 690 700 600 200 kA 150 kA 34790 234900 156963 114 •
PSR032US0700 PSR032UL0700 700 690 700 600 200 kA 150 kA 51191 291870 209287 127 •
PSR032US0800 PSR032UL0800 800 690 700 600 200 kA 150 kA 60125 472770 249000 152 •
PSR032US0900 PSR032UL0900 900 690 700 600 200 kA 150 kA 107785 764100 404000 145 •
PSR032US1000 PSR032UL1000 1000 690 700 600 200 kA 150 k A 190102 933120 672333 149 •
PSR032US1100 PSR032UL1100 1100 690 700 600 200 kA 150 kA 225379 1247400 744000 161 •
PSR032US1250 PSR032UL1250 1250 550 500* 450* 200 kA 150 kA 336661 1114994 1197000 166 •
PSR032US1400 PSR032UL1400 1400 450 500 450 200 kA 150 kA 551749 1611639 1865400 184 •
PSR032US1500 PSR032UL1500 1500 450 500 450 200 kA 150 k A 673360 2045907 1735500 192 •
33
PSR033US0450 PSR033UL0450 450 690 700 600 200 kA 150 kA 13600 106380 58947 107 •
PSR033US0500 PSR033UL0500 500 690 700 600 200 kA 150 kA 16434 140400 77846 107 •
PSR033US0550 PSR033UL0550 550 690 700 600 200 kA 150 kA 23314 187650 100461 111 •
PSR033US0630 PSR033UL0630 630 690 700 600 200 kA 150 kA 38727 285930 142437 120 •
PSR033US0700 PSR033UL0700 700 690 700 600 200 kA 150 kA 56763 392580 209863 116 •
PSR033US0800 PSR033UL0800 800 690 700 600 200 kA 150 kA 84691 575505 348500 122 •
PSR033US0900 PSR033UL0900 900 690 700 600 200 kA 150 kA 122619 740340 451177 138 •
PSR033US1000 PSR033UL1000 1000 690 700 600 200 kA 150 kA 222350 1170450 787750 138 •
PSR033US1100 PSR033UL1100 1100 690 700 600 200 kA 150 kA 310824 1568700 821400 138 •
PSR033US1250 PSR033UL1250 1250 690 700 500 200 kA 150 kA 476902 2403000 1674333 145 •
PSR033US1400 PSR033UL1400 1400 690 700 500 200 kA 150 k A 583552 2920050 1979750 173 •
PSR033US1500 PSR033UL1500 1500 600 650 500 200 kA 150 kA 674538 2433200 1996733 182 •
PSR033US1600 PSR033UL1600 1600 600 650 500 200 kA 150 kA 779948 2942800 2301633 208 •
PSR033US1800 PSR033UL1800 1800 600 650 500 200 kA 150 kA 952196 3785040 2724180 260 •
PSR033US2000 PSR033UL2000 2000 550 600 480 200 kA 150 kA 1234315 4131600 3755180 264 •
PSR033US2250 PSR033UL2250 2250 500 550 450 200 kA 150 kA 1236000 4459651 3859500 349 •
* PSR032 1250 A: 600 V Ac/550 V Dc