Surface Mount Fuses
NANO2® > Very Fast Acting Fuse > 456 Series
456 Series Fuse
RoHS
PS
E
Description
The High Current NANO2® Fuse is a small square surface
mount fuse that is designed to support higher current
requirements of various applications.
40A
20A, 25A, 30A
Agency Approvals
Agency
Agency File Number
Ampere Rating
E10480
20A - 40A
J50446929
20A - 40A
NBK030308-JP1021
20A - 30A
29862
20A - 40A
PS
E
Features
• Surface mount high
current fuse
• Available in ratings of 20
to 40 Amperes
• Fully compatible with
lead-free solder alloys
and higher temperature
profiles associated with
lead-free assembly
• UL Recognized UL/CSA/
NMX 248-1 and UL/CSA/
NMX 248-14
• RoHS compliant and
Halogen Free
• Conforms to DENAN’s
Appendix 3
• Conforms to EN 60127-1
and EN 60127-7
Applications
• Voltage regulator module
for PC server
• Basestation power
supply
• Cooling fan system for
PC server
• Storage system power
Electrical Characteristics
Additional Information
% of
Ampere Rating
100%
4 hours, Minimum
200%
60 seconds, Maximum
Opening Time
Datasheet
Samples
Resources
Electrical Specifications
Ampere
Rating (A)
Amp Code
Max
Voltage
Rating (V)
Interrupting
Rating
100A @125VAC
300A @ 65VAC
300A @ 100VDC
1000A @ 32VDC
500A @ 72VDC
100A @ 125VAC
300A @ 65VAC
500A @ 72VDC
1000A @ 32VDC
Agency Approvals
Nominal
Cold Resistance
(Ohms)
Nominal
Melting
2
I t (A2 Sec.)
Nom Voltage
Drop (mV)
0.00230
18
64.7
x
x
x
x
0.00192
45
68.38
x
x
x
x
PS
E
20
020.
125
25
025.
125
30
030.
125
100A @ 125VAC
300A @ 65VAC
1000A @ 32VDC
500A @ 72VDC
0.00132
81
69.9
x
x
x
x
40
040.
72
180A @ 72VDC
600A @ 60VDC
0.00105
191
55
x
x
-
x
Notes:
1. Cold resistance measured at less than 10% of rated current at 23°C.
2. Agency Approval Table Key: X=Approved or Certified, P=Pending.
3. I2t values stated for 1 msec opening time.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/22/19
Surface Mount Fuses
NANO2® > Very Fast Acting Fuse > 456 Series
Average Time Current Curves
1000
40
20
0
20
40
60
-60°C
-76°F
-40°C
-40°F
-20°C
-4°F
0°C
32°F
20°C
40°C
60°C
80°C
68°F 104°F 140°F 176°F
AMBIENT TEMPERATURE
100°C
212°F
120°C 140°C
248°F 264°F
100
TIME IN SECONDS
0
PERCENT OF DOWNUPRATING
PERCENT OF UPRATING
60
20A
25A
30A
40A
Temperature Re-rating Curve
10
1
Note:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
0.1
0.01
1
100
10
1000
CURRENT IN AMPS
Soldering Parameters – Reflow Soldering
Pre Heat
Pb – Free assembly
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (Min to Max) (ts)
60 – 180 secs
Average ramp up rate (Liquidus Temp (TL) to peak
5°C/second max.
TS(max) to TL - Ramp-up Rate
5°C/second max.
Reflow
- Temperature (TL) (Liquidus)
217°C
- Temperature (tL)
60 – 150 seconds
Peak Temperature (TP)
260+0/–5 °C
Time within 5°C of actual peak Temperature (tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max.
Time 25°C to peak Temperature (TP)
8 minutes max.
Do not exceed
260°C
tP
TP
Critical Zone
TL to TP
Ramp-up
TL
Temperature
Reflow Condition
tL
T S(max)
Ramp-down
T S(min)
Preheat
tS
25
time to peak temperature
(t 25ºC to peak)
Time
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/22/19
Surface Mount Fuses
NANO2® > Very Fast Acting Fuse > 456 Series
Product Characteristics
Body: Ceramic
Cap: Silver Plated Brass
Body: Brand Logo, Current Rating
MIL-STD-202, method 302, Test Condition A
(10,000 ohms, Minimum)
MIL-STD-202, Method 208
MIL-STD-202, Method 210,
Test Condition B (10 sec at 260OC)
Min. copper layer thickness = 100µm
Min. copper trace width =20A, 30
10mm (20A, 30A) / 15mm (40A)
Materials
Product Marking
Insulation Resistance
Solderability
Resistance to Soldering
Heat
PCB Recommendation for
Thermal Management
Thermal Shock
Vibration
Moisture Sensitivity Level
Moisture Resistance
Salt Spray
Mechanical Shock
Alternate methods of thermal management
may be used. In such cases, under normal
operations, the maximum temperature of
the fuse body should not exceed 90OC in a
25OC environment.
Dimensions
10.08
(.397”)
3.05
(.12”)
0456
12.60
(.496”)
Amp Code
Refer to Electrical
characteristics table
3.43
(.135”)
Recommended Pad Layout
Quantity code
E = 2500 pcs
D = 1500 pcs
4.445
(.175”)
12.50
(.492)
Packaging code
R = Tape and Reel
4.445
(.175”)
40 A
2.173
(.086”)
2.79
(.110”)
Packaging
Rating
0.30
(.012”)
20A, 25A,
30A
3.79
(.149”)
40A
5.72
(.225”)
5.65
(.222”)
020. E R
Series
6.10
(.240”)
1.70 typ
(0.067”)
F
J-STD-020, Level 1
MIL-STD-202 Method 106,
High Humidity (90-98%RH), Heat (65OC)
MIL-STD-202, Method 101,
Test Condition B
MIL-STD-202, Method 213,
Test Condition I (100 G’s peak for 6
milliseconds)
3.25
(.128”)
3.05
[.12”]
20 A
40A:
-55OC to 125OC with proper derating
MIL-STD-202, Method 107, Test Condition B
(5 cycles -65OC to 125OC)
MIL-STD-202, Method 201 (10-55 Hz)
Part Numbering System
20A, 25A, 30A:
F
Operating Temperature
Packaging
Option
24 mm Tape
and Reel
24 mm Tape
and Reel
Packaging
Specification
Quantity
Quantity &
Packaging Code
EIA RS-481-2
2500
ER
EIA RS-481-2 (IEC
286, part 3)
1500
DR
Recommended Pad Layout
13.3
(.524”)
Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining
or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal
injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for
any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended
by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
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/disclaimer-electronics.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/22/19
