Radial Leaded PTC
0ZRR Series
belfuse.com/circuit
-
protection
0ZRR Series
RoHS 2 Compliant
Application
Wide variety of electronic equipment
Product Features
-
Low hold current, Solid state, Radial leaded product ideal for up to 60VDC
-
AEC
-
Q
Compliant
-
Meets Bel
automotive qualification*
*
-
Largely based on internal AEC
-
Q test plan
Operating (Hold Current) Range
50mA
-
3.75A
Maximum Voltage
Temperature Range
60VDC
-
40
℃
to 85
℃
Agency Approval
TUV (Std. EN60738
-
1
-
1, Cert. R50102187)
UL Recognized Component
(Std. UL1434, File E305051)
UL Conditions of Accept
ability:
1. These devices have been investigated for use in safety circuits and are suitable
as a limiting device.
2. These devices have been calibrated to limit the current to 8 amps within 5
seconds, per ANSI/NFPA 70, “National Electrical Code”.
LEAD FREE =
HALOGEN FREE =
Electrical Characteristics (23
℃
)
Part Number
(Bulk)
Hold
Current
Trip
Current
Max Time to
Trip @ 5xIH
Max
Current
Rated
Voltage
Typical
Power
Resistance Tolerance
Agency Approvals
Rmin
R1
max
I
H
, A
I
T
, A
Seconds
I
max
, A
V
max
, V
dc
P
d
, W
Ohms
Ohms
A
0ZRR0005FF1E
0.05
0.10
5.0
40
60
0.26
7.30
20.00
Y
B
0ZRR0010FF1E
0.10
0.20
4.0
40
60
0.38
2.50
7.50
Y
Y
C
0ZRR0017FF1E
0.17
0.34
3.0
40
60
0.48
2.00
8.00
Y
Y
D
0ZRR0020FF1E
0.20
0.40
2.2
40
60
0.41
1.83
4.40
Y
Y
E
0ZRR0025FF1E
0.25
0.50
2.5
40
60
0.45
1.25
3.00
Y
Y
F
0ZRR0030FF1E
0.30
0.60
3.0
40
60
0.49
0.88
2.10
Y
Y
G
0ZRR0040FF1E
0.40
0.80
3.8
40
60
0.56
0.55
1.29
Y
Y
H
0ZRR0050FF1E
0.50
1.00
4.0
40
60
0.77
0.50
1.17
Y
Y
I
0ZRR0065FF1E
0.65
1.30
5.3
40
60
0.88
0.31
0.72
Y
Y
J
0ZRR0075FF1E
0.75
1.50
6.3
40
60
0.92
0.25
0.60
Y
Y
K
0ZRR0090FF1E
0.90
1.80
7.2
40
60
0.99
0.20
0.47
Y
Y
L
0ZRR0110FF1A
1.10
2.20
8.2
40
60
1.50
0.15
0.38
Y
Y
M
0ZRR0135FF1A
1.35
2.70
9.6
40
60
1.70
0.12
0.30
Y
Y
N
0ZRR0160FF1A
1.60
3.20
11.4
40
60
1.90
0.09
0.22
Y
Y
O
0ZRR0185FF1A
1.85
3.70
12.6
40
60
2.10
0.08
0.19
Y
Y
P
0ZRR0250FF1A
2.50
5.00
15.6
40
60
2.50
0.05
0.13
Y
Y
Q
0ZRR0300FF1A
3.00
6.00
19.8
40
60
2.80
0.04
0.10
Y
Y
R
0ZRR0375FF1A
3.75
7.50
24.0
40
60
3.20
0.03
0.08
Y
Y
I
H
Hold Current
-
maximum current at which the device will not trip in still air at 23
℃
.
I
T
Trip current
-
minimum current at which the device will always trip in still air at 23
℃
.
Imax Maximum fault current device can withstand without damage at rated voltage (Vmax).
Vmax Maximum voltage device can withstand without damage at its
rated current.
Pd Typical power dissipated by device when in tripped state in 23
℃
still air environment.
Rmin Minimum device resistance at 23
℃
.
R1max Maximum device resistance at 23
℃
, 1 hour after initial device trip, or after being soldered t
o PCB in end application.
AEC
-
Q
Compliant
Spe
cifications subject to change without notice
Type 0ZRR Series
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
© 201
9
Bel Fuse, Inc.
Rev. 0ZRR
J
an
2019
PTC’s
–
Basic Theory of Operation / “Tripped” Resistance Explanation
Fundamentally, a Bel PTC consists of a block of polymeric material containing conductive filler and bonded
between two conductive, planar terminations.
At currents below the device IHOLD rating, AND at temperatures below 100C, the PTC maintains a
resistance value below its R1 MAX rating.
As the device's temperature approaches 130C, either due to an increase in
ambient temperature or a
current exceeding its I TRIP rating, volumetric expansion of the filled polymer breaks apart the majority of
conductive pathways across the terminals created by chain contact of adjacent filler particles or device
resistance incre
ases sharply by several orders of magnitude.
At the much higher “Tripped” resistance, there is just enough leakage current to allow internal heating to
“hold” the device in its tripped state (around 125C) until power is interrupted. Once power is removed,
the
PTC's core cools and contracts allowing conductive chains to reform and return the device to its low
resistance state.
The catalog data for each device specifies a "Typical Power" value. This is the power required to exactly
match the heat lost by th
e tripped device to its ambient surroundings at 23C. By Ohm's Law, power can be
stated as: W = E^2/R. Thus the approximate resistance of a “Tripped” PTC can be determined by: R =
E^2/W, where "E" is the voltage appearing across the PTC (usually the supply'
s open circuit voltage), and
"W" is the Typical Power value for the particular PTC.
Since the PPTC acts to maintain a constant internal temperature, its apparent resistance will change based
upon applied voltage and, to a lesser degree, ambient conditions.
Consider the following example....
A PTC with a Typical Power of 1 watt protecting a circuit using a 60V supply will demonstrate an apparent,
tripped resistance "R" of:
R = 60^2/1 = 3,600 ohms
This same tripped device when used to protect a 12V circui
t would now present an apparent resistance of:
R = 12^2/1 = 144 ohms
The value for Typical Power is "typical" because any physical factors that affect heat loss (such as ambient
temperature or air convection) will somewhat alter the level of power that
the PTC needs to maintain its
internal temperature. In short, PTCs do not exhibit a constant, quantifiable tripped resistance value.
Type Time
–
To
–
Trip at 23
℃
.
Spe
cifications subject to change without notice
Type 0ZRR Series
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
© 201
9
Bel Fuse, Inc.
Rev. 0ZRR
J
an
2019
Physical Specifications
Lead material:
Matte tin plated copper, size / diameter as shown in Drawings and Table under Product
Dimensions.
Soldering charactcristics
MIL
-
STD
-
202, Method 208
H
.
Insu
lating coating
Flame retardant epoxy, meets UL
-
94
-
V
-
0 requirements.
P
TC Marking
“bel” or “b”, , I
H
code and “R
R
” .
Product Dimensions
All dimensions in mm.
Thermal Derating Curve
Cautionary Notes
1. Operation beyond the specified maximum ratings or
improper use may result in damage and possible
electrical arcing and/or flame.
2. These Polymer PTC (PPTC) devices are intended for
protection against occasional overcurrent/
overtemperature fa
ult conditions and may not be
suitable for use in applications where repeated and/or
prolonged fault conditions are anticipated.
3. Avoid contact of PTC device with chemical solvent.
Prolonged contact may adversely impact the PTC
performance.
4. These PTC devices may not be suitable for use in
circuits with a large inductance, as the PTC trip can
generate circuit voltage spikes above the PTC rated
voltage.
5. These devices are intended for use in DC voltage
applications only
. Use in AC voltage applications
should be first discussed with Bel Fuse engineering.
6. Not recommended for use on potted or conformal
coated PCB’s. Restriction of free air flow could affect
electrical
performance and/or result in device failure.
Consult Bel Fuse engineering.
Part
Number
Fig.
A
B
C
D
E
F
Max
Max
Typical
Min
Max
Typical
0ZRR0005FF
-
0ZRR0025FF
1
7.4
12.7
5.1
7.6
3.1
1.1
0ZRR0030FF
1
7.4
13.0
5.1
7.6
3.1
1.1
0ZRR0040FF
1
7.6
13.5
5.1
7.6
3.1
1.1
0ZRR0050FF
1
7.9
13.7
5.1
7.6
3.1
1.1
0ZRR0065FF
1
9.7
14.5
5.1
7.6
3.1
1.1
0ZRR0075FF
1
10.4
15.2
5.1
7.6
3.1
1.1
0ZRR0090FF
1
11.7
15.8
5.1
7.6
3.1
1.1
0ZRR0110FF
2
13.0
18.0
5.1
7.6
3.1
1.4
0ZRR0135FF
2
14.5
19.6
5.1
7.6
3.1
1.4
0ZRR0160FF
2
16.3
21.3
5.1
7.6
3.1
1.4
0ZRR0185FF
2
17.8
22.9
5.1
7.6
3.1
1.4
0ZRR0250FF
2
21.3
26.4
10.2
7.6
3.1
1.4
0ZRR0300FF
2
24.9
30.0
10.2
7.6
3.1
1.4
0ZRR0375FF
2
28.5
33.5
10.2
7.6
3.1
1.4
Spe
cifications subject to change without notice
Type 0ZRR Series
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
© 201
9
Bel Fuse, Inc.
Rev. 0ZRR
J
an
2019
Environmental Specifications
Temperature cycling
JESD22 Method JA
-
104
Biased humidity
MIL
-
STD
-
202 Method 103
Operational life
MIL
-
STD
-
202 Method 108
Terminal strength
AEC
-
Q200
-
004
Resistance to solvents
MIL
-
STD
-
202 Method 215
Mechanical shock
MIL
-
STD
-
202 Method 213
Vibration
MIL
-
STD
-
202 Method 204
Resistance to soldering heat
MIL
-
STD
-
202 Method 210
Thermal shock
MIL
-
STD
-
202 Method 107
Solderability
ANSI/J
-
STD
-
002
Solder
ing Parameters
Lead
-
free Wave Soldering Profile
Wave Solder Parameter
Average ramp
-
up rate
200
℃
/ second
Heating rate during preheat
typical 1
-
2
℃
/ second
Max 4
℃
/ second
Final preheat temperature
within 125
℃
of soldering
temperature
Peak temperature Tp
260
℃
Time within +0
℃
/
-
5
℃
of actual peak
temperature
10 seconds
Ramp
-
down rate
5
℃
/ second max.
Standard Packaging
P/N Explanation and Ordering Information
Part Number
Bulk
Reel/Tape
Pcs/Box
P/N Code
Pcs/Reel
P/N Code
0ZRR0005FF
-
0ZRR0090FF
3000
1E
30
00
2E
0ZRR0110FF
-
0ZRR0185FF
1000
1A
1500
2B
0ZRR0250FF
-
0ZRR0375FF
1000
1A
10
00
2A
Spe
cifications subject
to change without notice
