Surface Mount PTC
0ZCF Series
0ZCF Series – 2920 Chip
RoHS 2 Compliant
Application
All high-density boards
Product Features
- 2920 Chip Size, Fast Trip Time, High Hold Currents
- AEC-Q Compliant
- Meets Bel automotive qualification*
* - Largely based on internal AEC-Q test plan
Operating (Hold Current) Range
300mA – 7A
Maximum Voltage
6 – 60V (per table)
Temperature Range
-40℃ to 85℃
Agency Approval
AEC-Q Compliant
TUV (Std. EN60738-1-1, Cert. R50102117)
UL Recognized Component (Std. UL1434, File E305051)
UL Conditions of Acceptability:
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
New Rating
New Rating
New Rating
New Rating
New Rating
New Rating
Hold
Current
Trip
Current
Rated
Voltage
Maximum
Current
Typical
Power
IH, A
IT, A
Vmax, Vdc
Imax, A
Pd, W
Max Time to Trip
Current
Time
A
Sec
Resistance Tolerance Agency Approvals
Rmin
R1max
Ohms
Ohms
A 0ZCF0030FF2C
0.30
0.60
60
100
1.5
1.5
3.0
1.000
4.800
B 0ZCF0050FF2C
0.50
1.00
60
100
1.5
2.5
4.0
0.300
1.400
0ZCF0075FF2C
0.75
1.50
33
100
1.5
8.0
0.3
0.180
1.000
C
0ZCF0075AF2C
0.75
1.50
60
100
1.5
8.0
0.3
0.180
1.000
0ZCF0100AF2A
1.00
2.00
60
100
1.5
8.0
0.5
0.090
0.410
D
0ZCF0110FF2C
1.10
2.20
33
100
1.5
8.0
0.5
0.090
0.410
E 0ZCF0110AF2A
1.10
2.20
60
100
1.5
8.0
0.5
0.090
0.410
F 0ZCF0125FF2C
1.25
2.50
33
100
1.5
8.0
2.0
0.050
0.250
G 0ZCF0150FF2C
1.50
3.00
33
100
1.5
8.0
2.0
0.050
0.230
H 0ZCF0185FF2C
1.85
3.70
33
100
1.5
8.0
2.5
0.040
0.150
0ZCF0200FF2C
2.00
4.00
16
100
1.5
8.0
4.5
0.035
0.120
I
0ZCF0200AF2C
2.00
4.00
24
100
1.5
8.0
5.0
0.035
0.120
J 0ZCF0250FF2C
2.50
5.00
16
100
1.5
8.0
16.0
0.025
0.085
0ZCF0260FF2C
2.60
5.20
6
100
1.5
8.0
20.0
0.020
0.075
K
0ZCF0260AF2C
2.60
5.20
24
100
1.5
8.0
20.0
0.020
0.075
0ZCF0300FF2C
3.00
5.20
6
100
1.5
8.0
25.0
0.010
0.048
L 0ZCF0300AF2C
3.00
5.20
15
100
1.5
8.0
20.0
0.010
0.048
0ZCF0300BF2C
3.00
5.20
24
100
1.5
8.0
20.0
0.010
0.048
M 0ZCF0330FF2C
3.30
5.50
24
100
1.5
8.0
20.0
0.010
0.048
N 0ZCF0400FF2A
4.00
8.00
16
100
1.5
20.0
4.0
0.010
0.040
O 0ZCF0500FF2A
5.00
10.00
16
100
1.5
20.0
5.0
0.005
0.025
P 0ZCF0600FF2C
6.00
12.00
12
100
2.0
30.0
2.0
0.004
0.020
Q 0ZCF0700FF2C
7.00
14.00
12
100
2.0
35.0
2.0
0.003
0.018
IH
Hold Current-maximum current at which the device will not trip in still air at 23℃.
IT
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 to PCB in end application.
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Specifications subject to change without notice
belfuse.com/circuit-protection
Type 0ZCF Series
2/4
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 increases 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 the 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 circuit 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℃
Specifications subject to change without notice
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. 0ZCF May2019
Type 0ZCF Series
3/4
Pad Layout
Termination Pad Materials
The dimensions in the table below provide the recommended
pad layout.
Matte Tin – Plated Copper
P
S
Nominal
W
Nominal
Nominal
mm
Inch
mm
Inch
mm
Inch
5.10
0.201
2.30
0.091
5.60
0.221
Mechanical Dimensions and Marking
All dimensions in mm.
Dimensions
Part Number
Thermal Derating Curve
Marking Code
“b”, IH code
C
Min
Max
0ZCF0030FF2C
0.60
1.15
0030
0ZCF0050FF2C
0.60
1.15
0050
0ZCF0075FF2C
0.40
1.15
0075
0ZCF0075AF2C
0.60
1.15
0ZCF0100AF2A
0.40
1.70
0ZCF0110FF2C
0.40
1.00
0ZCF0110AF2A
0.40
1.70
0ZCF0125FF2C
0ZCF0150FF2C
0ZCF0185FF2C
0ZCF0200FF2C
0.40
0.40
0.30
0.30
0.90
0.90
0.90
0.90
0ZCF0200AF2C
0.20
0.80
0ZCF0250FF2C
0ZCF0260FF2C
0.30
0.30
0.90
0.90
0ZCF0260AF2C
0.65
1.15
0ZCF0300FF2C
0.40
0.90
0ZCF0300AF2C
0.40
1.15
0ZCF0300BF2C
0.65
1.15
0ZCF0330FF2C
0ZCF0400FF2A
0ZCF0500FF2A
0ZCF0600FF2C
0ZCF0700FF2C
0.65
0.40
0.40
0.40
0.30
1.15
1.50
1.50
1.70
1.50
0075
60
0100
60
0110
0110
60
0125
0150
0185
0200
0200
24
0250
0260
0260
24
0300
0300
15
0300
24
0330
0400
0500
0600
0700
Cautionary Notes
1. Operation beyond the specified maximum ratings or 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 fault 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.
7. MSL: 2a (According to IPC J-Std-020).
Specifications subject to change without notice
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. 0ZCF May2019
Type 0ZCF Series
4/4
Environmental Specifications
Temperature cycling
JESD22 Method JA-104
Biased humidity
MIL-STD-202 Method 103
Operational life
MIL-STD-202 Method 108
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
Board flex(SMD)
AEC-Q200-005
Terminal strength
AEC-Q200-006
Solder Reflow and Rework Recommendations
Profile Feature
Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp)
3℃/second max
Preheat :
Temperature Min (Tsmin)
Temperature Max (Tsmax)
Time (tsmin to tsmax)
Time maintained above:
Temperature(TL )
150℃
200℃
60-180 seconds
217℃
Time (tL)
60-150 seconds
Peak/Classification Temperature(Tp) :
260℃
Time within 5℃ of actual Peak :
Temperature (tp)
20-40 seconds
Ramp-Down Rate :
6℃/second max.
Time 25℃ to Peak Temperature :
8 minutes max
Solder Reflow
Due to “lead free / RoHS 2 ” construction of these PTC devices , the required Temperature and Dwell Time in the “ Soldering ” zone of the
reflow profile are greater than those used for non-RoHS devices.
1. Recommended reflow methods; IR, vapor phase oven, hot air oven.
2. Not Recommended For Wave Solder / Direct Immersion.
3. Recommended paste thickness range – 0.20 – 0.25mm.
4. Devices are compatible with standard industry cleaning solvents and methods.
5. MSL: 2a (According to IPC J-Std-020).
Caution
If reflow temperature / dwell times exceed the recommended profile, the electrical performance of the PTC may be affected.
Rework: MIL-STD-202G Method 210F, Test Condition A.
Standard Packaging
Part Number
P/N Explanation and Ordering Information
Tape/Reel Qty
0ZCF0030FF2C
Thru
2,000
0ZCF0075AF2C
0ZCF0100AF2A
1,000
0ZCF0110AF2A
1,000
0ZCF0110FF2C
Thru
2,000
0ZCF0330FF2C
0ZCF0400FF2A
1,000
0ZCF0500FF2A
0ZCF0600FF2C
2,000
0ZCF0700FF2C
2000 or 1000 fuses in 7 inches dia. Reel, 8mm wide
tape, 4mm pitch, per EIA-481(equivalent IEC-286 part 3).
Specifications subject to change without notice
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. 0ZCF May2019