Datasheet > 0304.050

0304.050

更新时间： 2023-12-06 20:12:55

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力特 - LITTELFUSE		/
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0304.050 数据手册

Fuse Datasheet

304 Series

PICO^®277V Intrinsically Safe Fuse

Product Characteristics

Temperature Rerating Curve

OperatingTemperature

Current Rating

AmbientTemperature

140

120

100

≤0.200A

0.250A

0.500A

0.750A

-40ºC to +60ºC

-40ºC to +56ºC

-40ºC to +84ºC

-40ºC to +56ºC

Notes:

1. Any use of the 304 Series fuse outside of the ambient temperature ranges speciﬁed in the table is subject to

additional investigation.

2. Speciﬁed ambient temperature range is for intrinsic safety certiﬁcation.

25˚C

Polyamide 6T/66

CTI 175 volts minimum

Molding Material

Continuous OperatingTemperature:

140°C

-60

-40

-20

100

120

Thermal Shock

Withstands 5 cycles of –55°C to 125°C

MIL-STD-202, Method 213

AMBIENTTEMPERATURE (˚C)

Mechanical Shock

Notes:

1. Rerating depicted in this curve is in addition to the standard rerating of 25% for continuous operation.

2. The temperature rerating curve represents the nominal conditions. For questions about temperature rerating

Insulation Resistance (After

Opening)

Greater than 10,000 ohms

(at twice rated DC voltage)

curve, please consult Littelfuse technical support for assistance.

Resistance to Soldering Heat

Moisture Resistance

Salt FogTest

MIL-STD-202, Method 210

MIL-STD-202, Method 106

MIL-STD-202, Method 101

Soldering Parameters

Reﬂow Condition

-Temperature Min (T

Pb-free assembly

150°C

s(min)

)

t_P

T_P

Critical Zone

s(max)

Pre Heat

-Temperature Max (T

)

200°C

Ramp-up

T_Lto T_P

-Time (Min to Max) (t )

60 − 120 seconds

T_L

T_S(max)

t_L

Average Ramp-up Rate (LiquidusTemp (T ) to

5°C/second max

peak)

Ramp-down

S(max)

toTL - Ramp-up Rate

5°C/second max

217°C

Preheat

-Temperature (T ) (Liquidus)

T_S(min)

Reﬂow

t_S

-Temperature (t )

60 − 150 seconds

260^+0/-5°C

PeakTemperature (T )

time to peak temperatur

(t 25ºC to peak)

Time within 5°C of actual peakTemperature (t )

Ramp-down Rate

20 − 40 seconds

5°C/second max

8 minutes max

260°C

Time

Time 25°C to PeakTemperature (T )

Do not exceed

Wave Soldering

260°C, 10 sec. max

Speciﬁcations are subject to change without notice.

Revised: GD. 10/14/21

123

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