Features产品特点：
• Compatible with leadfree solders and higher temperature profiles.
• High performance materials provide improved performance in elevated ambient temperature applications.
• Marked on top surface with code to allow amp rating identification without testing.
• Low profile for height sensitive applications.
• Flat top surface for pickand-place operations.
• Element covering material is resistant to industry standard cleaning operations.
• Mounting pad and electrical performance is identical to Littelfuse 431 and 434 Series products.
• Alloy based element construction provides superior inrush withstand characteristics (I2t) over ceramic or glass based 0603 fuse products.
Applications产品应用：
Secondary protection for space constrained applications:
• Cell phones
• Battery packs
• Digital cameras
• DVD players
• Hard disk drives.
|
Electrical Characteristics for Series |
|
|
% of Ampere Rating |
Opening Time at 25OC |
|
100% |
4 hours, Minimum |
|
200% |
5 sec., Maximum |
|
300% |
0.2 sec., Maximum |
Electrical Specifications by Item
|
AmpereRating (A) |
Amp Code |
Max Voltage Rating(V) |
Interrupting Rating
|
Nominal Cold Resistance (Ohms) |
Nominal Melting I2t (A2sec) |
Nom Voltage Drop(mV) |
Nom Power Dissipation (W) |
Agency Approvals |
|
|
UR |
CSA |
||||||||
|
0.250 |
.250 |
32 |
50A @32V AC/DC |
0.5450 |
0.0030 |
158.56 |
0.0396 |
x |
x |
|
0.375 |
.375 |
32 |
0.2900 |
0.0053 |
128.03 |
0.0480 |
x |
x |
|
|
0.500 |
.500 |
32 |
0.1870 |
0.0087 |
115.71 |
0.0579 |
x |
x |
|
|
0.750 |
.750 |
32 |
0.1170 |
0.0171 |
107.33 |
0.0805 |
x |
x |
|
|
1.00 |
001. |
32 |
0.0710 |
0.0212 |
89.10 |
0.0891 |
x |
x |
|
|
1.25 |
1.25 |
32 |
3 @32V AC/DC 13A @65V DC |
0.0530 |
0.0518 |
84.32 |
0.1054 |
x |
x |
|
1.50 |
01.5 |
32 |
0.0410 |
0.0766 |
81.14 |
0.1217 |
x |
x |
|
|
1.75 |
1.75 |
32 |
3 @32V AC/DC |
0.0320 |
0.0903 |
78.75 |
0.1378 |
x |
x |
|
2.00 |
002. |
32 |
0.0300 |
0.1103 |
78.22 |
0.1564 |
x |
x |
|
|
2.50 |
02.5 |
32 |
0.0220 |
0.1440 |
76.10 |
0.1903 |
x |
x |
|
|
3.00 |
003. |
32 |
0.0180 |
0.2403 |
75.04 |
0.2251 |
x |
x |
|
|
3.50 |
03.5 |
32 |
0.0150 |
0.4306 |
74.25 |
0.2599 |
x |
x |
|
|
4.00 |
004. |
32 |
0.0130 |
0.5760 |
73.72 |
0.2949 |
x |
x |
|
|
5.00 |
005. |
32 |
0.0090 |
0.9000 |
72.71 |
0.3635 |
x |
x |
|
1. Measured at 10% of rated current, 25ºC. 2. Measured at rated voltage.
Temperature Rerating Curve
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Example:For continuous operation at 70 degrees celsius, the fuse should be deratedas follows:
I = (0.75)(0.80)IRAT = (0.60)IRAT
2. The temperature derating curve represents the nominal conditions. For questions about temperature derating curve, please consult Littelfuse technical support for assistance.
Average Time Current Curves
Soldering Parameters
|
Reflow Condition |
Pb– Free assembly |
|
|
Pre Heat |
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) |
250+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 |
|
|
Wave Soldering |
260°C, 10 seconds max. |
|
Product Characteristics
|
Materials |
Body: Advanced High Temperature Substrate |
|
Terminations: 100% Tin over Nickel over Copper |
|
|
Element Cover Coat: Conformal Coating |
|
|
Operating Temperature |
– 55OC to 90OC. Consult temperature rerating curve chart. For operation above 90°C contact us |
|
Humidity |
MIL-STD-202F, Method 103B, Condition D |
|
Thermal Shock |
Withstands 5 cycles of – 55OC to 125OC |
|
Vibration |
Per MIL-STD-202F |
|
Insulation Resistance (After Opening) |
Greater than 10,000 ohms. |
|
Resistance to Soldering Heat |
MIL-STD-202G, Method 210F,Condition D |
Dimensions
|
Part Marking System |
|
|
Amp Code |
Marking Code |
|
.250 |
D |
|
.375 |
E |
|
.500 |
F |
|
.750 |
G |
|
001. |
H |
|
1.25 |
J |
|
01.5 |
K |
|
1.75 |
L |
|
002. |
N |
|
02.5 |
O |
|
003. |
P |
|
03.5 |
R |
|
004. |
S |
|
005. |
T |
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