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[HE] @B OZCF Series -2920 Chip RoHS 6 Compliant & Halogen-Free Application All high-density boards Product Features

2920 Chip Size , Fast Trip Time, High Hold Currents

Operating (Hold Current) Range 300mA - 3A. Maximum Voltage Aa ° 6 - GOV (per table) fov CAMs Temperature Range ‘ ~40°C to 85°C F, {ea Agency Approval . TUV (Std. EN60738-1-1, Cert. R50102117) . A y UL Component (Std. UL1434, File E305051) . ea eS UL Conditions of Acceptability: > 1. These devices have been investigated for use in safety circuits and are suitable as Kos a limiting device. - 2. These devices have been calibrated to limit the current to 8 amps within 5 seconds, SO per ANSI/NFPA 70, “National Electrical Code”. LEAD FREE = (PB) Electrical Characteristics (23°C) HALOGEN FREE = [HF] Hold | Trip Rated | Maximum| Typical | Max Time to Trip | Resistance Tolerance | Agency Approvals patvamear [ume |curwt|_votge | Comet | Power [Gmnt[ Time | aon [mime Tay] | | IH,A | ITA | Vmax, Vdc| imax,A | Pd.wW | A | Sec | Ohms | Ohms | Eine |A| ozcroosorr2c | oso | oso | 60 | 100 | 15 | 15 | 30 | 1000 | 400 {| y | y | |p| ozcroosorr2c | oso | 100 | eo | 100 | 45 | 25 | 40 | 0300 | 1400 [oy [oy | eee ee ee eet New ge cdeombinsea, been ek ek tel [ozcro1i0rr2c | 110 | 2200 | as too is eo os 0000 oat yy ozcroisorr2c | 1.50 | 3.00 Ee EF YY |G| ozcrorssrrac | 1.85 | 370 | 33 | too | 15 {| so | 25 | oo4 | o1so | vy | y | | ozcroz0oarac | 200 | 400 | 24 | too | 15 | so | 50 | o0s5 | o120 | vy | vy | |! | ozcroasorrac | 250 | 500 | 16 | 100 | 15 | 80 | 160 | oo | oos | y | y | nf cmeroasortsc . 260 | sap. gf mp we | ge | 2 | com fom ew afthbsozcroz60AF2c | 260 | 620 | [| io [4s [80 [ 200 [ o02 | oors [oy [oy | | 100 | 16 | 80 | 250 | oo10 | oo | vy | oy | | ozcrosooarec | 300 | 520 | 15 | io | 15 | 80 | 200 | oo | oo | vy | yv | wew apsings OZCFOs00BF2C | 3.00 | 520 | 24 [| 100 | 15 [| 80 | 200 | oo | oo | Y [ y | IH Hold Current-maximum current at which the device will not trip in still air at 23°C. IT Trip current-minimum current at which the device will always trip in still air at 23°C. 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°C still air environment. Rmin Minimum device resistance at 23°C. Rimax Maximum device resistance at 23°C, 1 hour after initial device trip, or after being soldered to PCB in end application. ‘Specifications subject to change without notice as ee S POWER era? 206 Van Vorst Street techhelp@belf.com ee abel group Jersey City, NJ 07302 USA belfuse.com © 2016 Bel Fuse, Inc. OZCF Nov2016 1/4

[HE] @ OZCF Series -2920 Chip RoHS 6 Compliant & Halogen-Free 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 | 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 = E42/R. Thus the approximate resistance of a “Tripped” PTC can be determined by: R = E42/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... APTC with a Typical Power of 1 watt protecting a circuit using a 60V supply will demonstrate an apparent, tripped resistance "R" of: R = 6042/1 = 3,600 ohms This same tripped device when used to protect a 12V circuit would now present an apparent resistance of: R = 1242/1 = 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 237 (See Elec. Characteristics Table for P/N - Curve correlation) A B CD EFGH WK 0 == SS SS = aay ee ee Na re NG el o (OCCONTIR NANG) a FSSA ARS ee EROS Bo eT EAN — eee eee cov EE ooo LT TTT of ‘Fault Current (a) '° 0 Specifications subject to change without notice eG Ss POWER era? 206 Van Vorst Street techhelp@belf.com ee abel group Jersey City, NJ 07302 USA belfuse.com © 2016 Bel Fuse, Inc. OZCF Nov2016 2/4

[HF] @ OZCF Series -2920 Chip RoHS 6 Compliant & Halogen-Free Pad Layout Termination Pad Materials The dimensions in the table below provide the Matte Tin - Plated Copper recomment pad layout. w [op of st lw All dimensions in mm. Mechanical Dimensions and Marking | rannmner [ge en | oe a | ae - ‘azcFo0s0EF2C 0.0 us ‘050 ae er + ,£(050-0.90mm) ZCFOOTSFFZC 040—| 146 0075 T woroorswec | oe | 118 oars |ozcrorasrrec {040 | oo | ovas_ | — a SS | ozcroresrrac | (678-7 6mm 200 eile azcro200Ar2¢ 020 080 200 Top and Bottom View betcha ae = | ewer | aw | ow Thermal Derating Curve [_ccsrevcore [oe [vse TT ae Cautionary Notes Hold & Trip Current and Thermal Derating Curve 1. Operation beyond the specified maximum ratings or improper use may result in damage and possible electrical arcing and/or flame. ame 2. These Polymer PTC (PPTC) devices are intended for < protection against occasional overcurrent/ S ae ‘overtemperature fault conditions and may not be = _ IT | suitable for use in applications where repeated and/or Sw e p d prote t. prolonged fault conditions are anticipated. SS 20m 1 _| 3. Avoid contact of PTC device with chemical solvent. BE | | Prolonged contact may adversely impact the PTC os di L Ba performance. ZS ico, |Indetel p a 4, These PTC devices may not be suitable for use in sa Uy) circuits with a large inductance, as the PTC trip can = generate circuit voltage spikes above the PTC rated BE 00% MTT voltage. 3 Tm a 5. These devices are intended for use in DC voltage 4 applications only. Use in AC voltage applications 7 5% Devic 6 tee should be first discussed with Bel Fuse engineering. 2 6. Not recommended for use on potted or conformal a coated PCB's. Restriction of free air flow could affect of electrical performance and/or result in device failure. 40 20 ° 20 40 60 80 Consult Bel Fuse engineering. Ambient Temperature (C) 7. In the “Indeterminate Performance / grey zone”, tripping may occur but cannot be relied upon. For ———olac nt == Tripc t special circumstances considering use within this urre| p Curren region, consult Bel Fuse Engineering. 8. MSL : 2a (According to IPC J-Std-020). Specifications subject to change without notice pete POWER fi @ es bel SeSYEISNS & Bel Fuse Inc. +1 201.432.0463 ee os 206 Van Vorst Street techhelp@belf.com ee abel group Jersey City, NU 07302 USA belfuse.com © 2016 Bel Fuse, Inc. OZCF Nov2016 3 /4

[HE] @ OZCF Series -2920 Chip RoHS 6 Compliant & Halogen-Free Solder Reflow and Rework Recommendations tp Taree (critical Zone| Profile Feature [Pb-Free Assembh Aa lead ‘Average Ramp-Up Rate (Tsmax to Tp) _| 3°C/second max ft [Ramp-up} Preheat : Ty ppg enn ng Temperature Min (Tsmin) 150°C @ || [Tena Temperature Max (Tsmax) 200°C 2LLi Time (tsmin to tsmax) 60-180 seconds s ‘Time maintained above: s fad Temperature(TL) 217°C E —- 1 [Ramp-down] Time (ti 60-150 seconds e Peak/Classification Temperature(Tp): _|260°C ‘Time within 5°C of actual Peak : 120-40 seconds —_| ‘ei ‘Temperature (tp 20-40 seconds | ¢25°C to Peak Ramp-Down Rate : 6°C/second max. Time —> Time 25°C to Peak Temperature : Solder Reflow Due to “ lead free / RoHS 6 ” 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 P/N Explanation and Ordering Information [ "Part Number | “Tape/Real Gly] 2000 or 1000 fuses in 7 i i inches dia. Reel, mm OZCF = OXXX_ —-X_X_XX wide tape, 4mm pitch, PTC series per EIA-481 (equivalent OZCF, 2920 Size |_ozcroiooar2a | 4,000 | eC-286 part 3). : Refer to Part Number and IH Rating in Electrical Characteristics Table on Pt.

Electrical Characteristics

F = Standard Design ‘Ato Z (except F) = Special, customer spec, DCR sor, ete. i sera one ues = Speci . Ato Z (except F) = Special, customer spec, lead forming, etc. Tape & Reel Qty See mind packarhng _ ‘Specifications subject to change without notice ae. POWER EEC) a SOLUTIONS & Bel Fuse Inc. +1 201.432.0463 es a 206 Van Vorst Street techhelp@belf.com ss abel group Jersey City, NJ 07302 USA belfuse.com © 2016 Bel Fuse, Inc. OZCF Nov2016 4/4