Type UMTS 250V UMF
Square Ceramic Surface Mount Time Lag Fuse
belfuse.com/circuit-protection
UMTS Series – 4818 Size RoHS 2 Compliant
Features
- Time lag
- 250VAC, Voltage Rating
- Wide range of current rating from 250mA to 6.3A
- Wide operating temperature range
- Tape & Reel for auto-insert SMD process
- RoHS 2 compliant
- Halogen Free
- Lead Free
Applications
- Lighting system
- LCD monitor
- Office electronic equipment
- Industrial equipment
- Medical equipment
- Power supply
Electrical Characteristics (Per IEC60127-4) Safety Agency Approvals
Testing
Current
Blow Time
Minimum
Maximum
125%
1 Hr.
N/A
200%
N/A
2 Min.
1000%
0.01 Sec
0.1 Sec
Physical Specifications
Materials
Marking
Safety
Agency
Safety Agency
Certificate
Voltage Rating
(V)
Ampere Range / Volt
@ I.R. ability*
E315341
250mA–6.3A/250V AC
/350V AC
250mA-6.3A/250V@150A AC
/350V@100A AC
R 50399509
Tested according to
IEC60127-
1:2006+A1+A2
IEC 60127-7:2016
1.6A/250V AC
/350V AC
1.6A/250V@150A AC
/350V@100A AC
*I.R.= Interrupting Rating = Short Circuit Rating(Amps)
LEAD FREE =
HALOGEN FREE =
Specifications subject to change without notice
Type UMTS 250V UMF
2 / 4
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302 USA
+1 201.432.0463
Bel.US.CS@belf.com
belfuse.com/circuit-protection
© 2019 Bel Fuse, Inc.
Rev. UMTS Nov2019
Environmental Specifications
Electrical Specifications
Catalog
Number
Ampere
Rating
Typical
Cold
Resistance
(ohms)
Volt-drop
@100% In
(Volt) max.
Voltage and
Interrupting
Ratings
Melting I²T
@10 In
(A² Sec)
Maximum
Power
Dissipation
(W)
Agency
Approvals
UMTS 250
250mA
0.78
0.314
See Table of Safety
Approvals on Page 1
for Voltage and
associated
Interrupting Ratings
0.26
0.12
Y
UMTS 315
315mA
0.56
0.279
0.42
0.14
Y
UMTS 400
400mA
0.35
0.248
0.67
0.16
Y
UMTS 500
500mA
0.245
0.221
1.1
0.19
Y
UMTS 630
630mA
0.180
0.197
1.7
0.21
Y
UMTS 800
800mA
0.132
0.175
2.8
0.25
Y
UMTS 1
1A
0.085
0.156
4.4
0.28
Y
UMTS 1.25
1.25A
0.065
0.155
7.0
0.33
Y
UMTS 1.6
1.6A
0.061
0.150
5.6
0.37
Y
Y
UMTS 2
2A
0.043
0.145
9.2
0.43
Y
UMTS 2.5
2.5A
0.035
0.140
15
0.50
Y
UMTS 3.15
3.15A
0.025
0.135
25
0.57
Y
UMTS 4
4A
0.020
0.130
42
0.66
Y
UMTS 5
5A
0.014
0.120
69
0.75
Y
UMTS 6.3
6.3A
0.011
0.115
113
0.87
Y
Consult manufacturer for other ratings
Shock Resistance
MIL-STD-202G, Method 213B, Test Condition 1
(100 G's peak for 6 milliseconds; Sawtooth waveform)
Vibration Resistance
MIL-STD-202G, Method 201A (10-55 Hz, 0.06 inch, total excursion).
Salt Spray Resistance
MIL-STD-202G, Method 101E, Test Condition B (48 hrs).
Insulation Resistance
MIL-STD-202G, Method 302, Test Condition B
(After Opening) 0.1Mohms minimum.
Solderability
MIL-STD-202G, Method 208H
Resistance to solder Heat
MIL-STD-202G, Method 210F, Test Condition J. (235℃,30 sec)
Thermal Shock
MIL-STD-202G, Method 107G, Test Condition B
(-65℃ to +125℃).
Operating Temperature
-55℃ to +125℃
Moisture Sensitivity Level
1 ( Peak Temperature at 240℃ for 30 seconds max )
Specifications subject to change without notice
Type UMTS 250V UMF
3 / 4
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302 USA
+1 201.432.0463
Bel.US.CS@belf.com
belfuse.com/circuit-protection
© 2019 Bel Fuse, Inc.
Rev. UMTS Nov2019
Temperature Derating Curve Average Time Current Curve
Soldering Parameters
Soldering Guidelines
Reflow Conditions Recommended 240℃, 30 sec. max.
NOT Recommended for Wave solder / Direct immersion / Hand Solder
IR Reflow Profile
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
150℃
200℃
60-120 seconds
Average ramp-up rate (Tsmax to Tp)
3℃/second max.
Liquidous temperature (TL)
Time at liquidous (tL)
217℃
60-150 seconds
Peak temperature (Tp)
240℃ max
Time (tp) within 5℃ of the
specified classification temperature (Tc)
30 seconds
Average ramp-down rate (Tp to Tsmax)
6℃/second max.
Time 25℃ to peak temperature
8 minutes max.
Specifications subject to change without notice
Type UMTS 250V UMF
4 / 4
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302 USA
+1 201.432.0463
Bel.US.CS@belf.com
belfuse.com/circuit-protection
© 2019 Bel Fuse, Inc.
Rev. UMTS Nov2019
Fuse FGNO Explanation
0683 - [XXXX] - XX
0683-=UMTS; [XXXX]=Ampere Rating; XX=See Ordering Information as below
Mechanical Dimensions Ordering Information
Packaging
Packaging Tape & Reel
Packaging Specification
Quantity
Quantity & Packaging Code
24 mm wide tape with 13 inches Diameter reel
EIA Standard 481-E
1500
01
Fraction
Decimal
Milliamps
Bel FGNO[XXXX]
Fraction
Decimal
Amps
Bel FGNO[XXXX]
1/4
0.250
250
0250
1.0
1
1000
.315
315
0315
1-1/4
1.25
1.25
1250
4/10
.400
400
0400
1.60
1.6
1600
1/2
.500
500
0500
2.0
2
2000
.630
630
0630
2-1/2
2.5
2.5
2500
8/10
.800
800
0800
3.15
3.15
3150
4.0
4
4000
5.0
5
5000
6.3
6.3
6300
Specifications subject to change without notice