FUZETEC TECHNOLOGY CO., LTD.
NO.
PQ35-108E
Product Specification and Approval Sheet
Version
2
Page
1/4
NOTE : Specification subject to change without notice.
Surface Mountable PTC Resettable Fuse: Lo Rho FSMD0603 Series
1. Summary
(a) RoHS Compliant & Halogen Free
(b) Applications: All high-density boards
(c) Product Features: Small surface mountable, Solid state, Faster time to trip than
standard SMD devices, Lower resistance than standard SMD devices
(d) Operation Current: 0.25~0.75A
(e) Maximum Voltage: 6~9V
(f) Temperature Range : -40℃ to 85℃
2. Agency Recognition
UL: File No. E211981
C-UL: File No. Pending
TÜ V: File No. Pending
3. Electrical Characteristics (23℃)
Part
Number
Hold
Current
Trip
Current
Rated
Voltage
Max
Current
Typical
Power
Max Time to Trip
Resistance
Current
Time
RMIN
R1MAX
IH, A
IT, A
VMAX, VDC
IMAX, A
Pd, W
A
Sec
Ohms
Ohms
FSMD025-0603RZ
0.25
0.55
9
100
0.5
8.0
0.08
0.500
3.000
FSMD035-0603RZ
0.35
0.75
6
100
0.5
8.0
0.10
0.200
1.000
FSMD050-0603RZ
0.50
1.00
6
100
0.6
8.0
0.10
0.070
0.350
FSMD075-0603RZ
0.75
1.50
6
100
0.6
8.0
0.20
0.050
0.250
IH=Hold current-maximum current at which the device will not trip at 23℃still air.
IT=Trip current-minimum current at which the device will always trip at 23℃ still air.
V MAX=Maximum voltage device can withstand without damage at it rated current.(I MAX)
I MAX= Maximum fault current device can withstand without damage at rated voltage (V MAX).
Pd=Typical power dissipated-type amount of power dissipated by the device when in the tripped state in 23℃ still air environment.
RMIN=Minimum device resistance at 23℃ prior to tripping.
R1MAX=Maximum device resistance at 23℃ measured 1 hour post trip.
Termination pad characteristics
Termination pad materials: Pure Tin
FUZETEC TECHNOLOGY CO., LTD.
NO.
PQ35-108E
Product Specification and Approval Sheet
Version
2
Page
2/4
NOTE : Specification subject to change without notice.
4. FSMD Product Dimensions (Millimeters)
Part
Number
A
B
C
D
E
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
FSMD025-0603RZ
1.40
1.80
0.45
1.00
0.35
0.75
0.10
0.50
0.08
0.40
FSMD035-0603RZ
1.40
1.80
0.45
1.00
0.35
0.75
0.10
0.50
0.08
0.40
FSMD050-0603RZ
1.40
1.80
0.45
1.00
0.35
0.75
0.10
0.50
0.08
0.40
FSMD075-0603RZ
1.40
1.80
0.45
1.00
0.35
0.75
0.10
0.50
0.08
0.40
5. Thermal Derating Curve
0%
50%
100%
150%
200%
-40 -20 0 20 40 60 80
Percent of Rated Hold and Trip Current
Ambient Temperature (℃)
Lo Rho FSMD0603 series