0ZRB0400FF1A

OZRB Series 

## Radial Leaded PTC 

## [HF]@ OZRB Series Fuse 

RoHS 6 Compliant & Halogen-Free 

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Application<br>Electronic Applications<br>Product Features<br>Low DCR Resistance, High Hold Currents<br>Operating (Hold Current) Range<br>900mA - 9A<br>A ° Maximum Voltage<br>TUV Wks 30VDC<br>Temperature Range<br>Agency Approval<br>TUV (Std. EN60738-1-1, Cert. R50102187)<br>a UL Component (Std. UL1434, File E305051)<br>= = at UL Conditions of Acceptability:<br>ae ie ‘ ' : 1. These devices have been investigated for use in safety circuits and are suitable as<br>reea ati . -40°Ca limitingto85°Cdevice.<br>— 2. These devices have been calibrated to limit the current to 8 amps within 5 seconds,<br>per ANSI/NFPA 70, “National Electrical Code”. LEAD FREE = G)<br>Electrical Characteristics (23) HALOGEN FREE - [Hf<br>Cu) Current |Current @ 5xlH Current | Voltage | Power fii fimo etme | 2 |<br>A| ozRBOOQOFFIC |wa0.90 | 18a || Seconds59 |  imax, A_|Vmax,40 | 30Vdc|| Pd,06 W || Ohmsoo7  || Ohms0160 |  Ohms022 _| Y | Y |<br>B/ozrBoio0FFiC | 110 | 22 | 66 | 40 | 30 | o7 | 005 | 0140) O17 | Y | oY |<br>C| OZRBOISSFFIE | 135 | 27 | 73 | 40 | 30 | 08 | 0.04 | 0.095 | 013 | Y | oY<br>‘D/ ozRBo1eOFFIE | 160 | 3.2 | 80 | 40 | 30 | 09 | 003 | 0080 | 011 | Y | Y |<br>| OZRBOISSFFIE | 185 | 37 | 87 | 40 | 30 | 10 | 0.03 | 0070 | 009 | Y | Y |<br>F|ozrpozsorFic | 250 | 50 | 103 | 40 | 30 | 12 | oo2 | 0050 | oo7 | vy | Y |<br>G| OZRBOSOOFFIA | 3.00 | 60 | 108 | 40 | 30 | 20 | oo2 | 0050) 008 | Y | y |<br>H| OZRBO4OOFFIA | 4.00 | 8.0 | 127 | 40 | 30 | 25 | oor | 0035 | 005 | Y | Y |<br>|| 0ZRBOSOOFFIA | 5.00 | 100 | 145 | 40 | 30 | 30 | 0.01 | 0022 | 005 | Y | y |<br>J | ozRBO600FFIA | 6.00 | 120 | 160 | 40 | 30 | 35 | 0.005 | 0018 | 004 | Y | y |<br>‘K | oZRBO700FFIA | 7.00 | 140 | 175 | 40 | 30 | 38 | 0.005 | 0.015 | 003 | Y | y |<br>| ozRBosoorFiA | 8.00 | 160 | 188 | 40 | 30 | 40 | 0005 | 0012 | 002 Y | y |<br>'M| OZRBOQOOFFIA | 9.00 | 180 | 200 | 40 | 30 | 42 | 0.005 | 0.011 | 002 | Y | y |<br>IH Hold Current-maximum current at which the device will not trip in still air at 23°C.<br>IT Trip current-minimum current at which the device will always trip in still air at 23°C.<br>Imax Maximum fault current device can withstand without damage at rated voltage (Vmax).<br>Vmax Maximum voltage device can withstand without damage at its rated current.<br>Pd Typical power dissipated by device when in tripped state in 23°C still air environment.<br>Rmin Minimum device resistance at 23°C.<br>Rmax Maximum device resistance at 23°C.<br>Rimax Maximum device resistance at 23°C, 1 hour after initial device trip, or after being soldered to PCB in end application.<br>Specifications subject to change without notice<br>ET @ x e Ses yen © Bel Fuse Inc. +1 201.432.0463<br>‘Seen? 206 Van Vorst Street techhelp@belf.com<br>oe a bel group Jersey City, NJ 07302 USA belfuse.com<br>**----- End of picture text -----**<br>


© 2017 Bel Fuse, Inc. OZRB Jan2017 1/4 

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Radial Leaded PTC<br>**----- End of picture text -----**<br>


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OZRB Series<br>RoHS 6 Compliant & 6 Compliant & & Halogen-Free<br>**----- End of picture text -----**<br>


[HF]@B OZRB Series Fuse RoHS 6 Compliant & 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 = 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 = 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. 

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Type Time - To - Trip at 237<br>**----- End of picture text -----**<br>


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(See Elec. Characteristics Table for P/N - Curve correlation)<br>AB CDE FG H |IJKLM<br>}—_____—$ |eeeAN SEAS _ SSS SSS ~/ [OT TTT<br>a —————=—pd TP+ ISSALES=> =>. OS OSS SS nee<br>ra +i]OSS<br>= 1 TS IRAE sr<br>———== = = = ===>eee<br>2> os eC SSSSE<br>£ _—— SSS<br>F SS eee<br>ey ET SO DS<br>0.001Ph10 100<br>Fault Current (A)<br>**----- End of picture text -----**<br>


Specifications subject to change without notice 

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Ase POWER<br>re: e soburions ©<br>eee:<br>“Se" abel group<br>**----- End of picture text -----**<br>


Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street techhelp@belf.com Jersey City, NJ 07302 USA belfuse.com 

© 2017 Bel Fuse, Inc. OZRB Jan2017 2/4 

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OZRB Series<br>[HF]@B OZRB Series Fuse RoHS 6 Compliant & Halogen-Free<br>Physical Specifications<br>Lead material:<br>Matte tin plated copper, size / diameter as shown in Drawings and Table under Product<br>Dimensions.<br>Soldering charactcristics<br>MIL-STD-202, Method 208H.<br>Insulating coating<br>Flame retardant epoxy, meets UL-94-V-0 requirements.<br>PTC Marking<br>“bel” or “b”, , lH code and “RB” .<br>Product Dimensions<br>All dimensions in mm.<br>| La “1 “tre Partnumber |Fs: [jes Mex [ypc wn [Max [piel<br>B Ty | OZRBOOSOFF | 7 | 7.4 | 122 | 51 | 76 | 3 | 0.9 |<br>| B PozRBOTIOFF | 1 | 7.4 | 142 | 51 | 76 | 3 | 09 |<br>| | OZRBOISSFF | 1 | 89 | 135 | 51 | 76 | 3 | 09 |<br>Le | OZRBOIGOFF [1 | 89 | 15.2 | 51 | 76 | 3 | 09 |<br>I F kK-C—| Df | KF |P OZRBOISSFFozreozsorr || 11 || 11.410.2 || 157183 || 5.151 |[7676 || 33 || 0909 | |<br>8 6 60 Py 6 | OZRBOSOOFF | 2 | 11.4 | 17.3 | 5.1 | 76 | 3 | 1.2 |<br>Fig.1 Fig.2 ade | OZRBO400FF| OZRBOSOOFF || 22 || 14.014.0 || 20124.9 || 10.25.1 || 767.6 || 33 || 1.21.2 ||<br>| OZRBOGOOFF | 2 | 16.5 | 249 | 10.2 | 76 | 3 | 12 |<br>Lead Size : 24AWG Lead Size : 20AWG | ozRBO700FF | 2 | 19.1 | 26.7 | 10.2 | 76 | 3 | 1.2 |<br>Sans on Clameler an =) vere Geneler ozrBosoorr | 2 | 21.6 | 29.2 | 10.2 | 76 | 3 | 12 |<br>. 2 | ozABogoorF | 2 | 24.1 | 297 | 10.2 | 76 | 3 | 142 |<br>Thermal Derating Curve<br>Cautionary Notes<br>Hold & Trip Current and Thermal Derating Curve 1. Operation beyond the specified maximum ratings or<br>300% electricalimproper usearcing mayand/or resultflame.in damage and possible<br>~ 2. These Polymer PTC (PPTC) devices are intended for<br>= protection against occasional overcurrent/<br>oc=SS ws 250%200% |)= | KA)in Device will trip and protect circuit. | | overtemperaturesuitableprolonged forfault use conditions infault applicationsconditionsare anticipated. where and repeated and/ormay not be<br>ct 2 3. Avoid contact of PTC device with chemical solvent.<br>oS s Prolonged contact may adversely impact the PTC<br>ZO iso He e pe a = | | performance.<br>= eo 4. These PTC devices may not be suitable for use in<br>° = circuits with a large inductance, as the PTC trip can<br>S$ — 100% } 1} generate circuit voltage spikes above the PTC rated<br>QiJ © Th 5. These|=devices are intended for use in DC voltage<br>® = 50% Ye - Fy Lt applications only. Use in AC voltage applications<br>2 1 ion should be first discussed with Bel Fuse engineering.<br>® 6. Not recommended for use on potted or conformal<br>a. 0% coated PCB’s. Restriction of free air flow could affect<br>-40 -20 0 20 40 60 80 electrical performance and/or result in device failure.<br>Ambient Temperature (CC ) Consult Bel Fuse engineering.<br>7. In the “Indeterminate Performance / grey zone”,<br>— = tripping may occur but cannot be relied upon. For<br>Hold Current ==" Trip Current special circumstances considering use within this<br>region, consult Bel Fuse Engineering.<br>Specifications subject to change without notice<br>a»Age [&] ors St POWER<br>rt nage<br>re: e See yee Bel Fuse Inc. +1 201.432.0463<br>Zee: 206 Van Vorst Street techhelp@belf.com<br>“Se = abel group Jersey City, NJ 07302 USA belfuse.com<br>**----- End of picture text -----**<br>


© 2017 Bel Fuse, Inc. OZRB Jan2017 3/4 

OZRB Series RoHS 6 Compliant & Halogen-Free 

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[HF]@® OZRB Series Fuse<br>**----- End of picture text -----**<br>


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Soldering Parameters<br>**----- End of picture text -----**<br>


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Lead-free Wave Soldering Profile<br>[Wave|SolderParameter<br>AF typical 1 - 2°C / second<br>within 125°C of soldering temperature<br>Time win x0°C/ 5° ofecu peak temperate<br>'5 t<br>© 260 Sey beset 1 2ND WAVE<br>QU 1 ST WAVE \<br>Lu '<br>—_ to<br>' '<br>< 200°C/SEC - 4 ,<br>uw ' ' '<br>a. as<br>= 100 + ------+ : ‘ : ' 2°C/SEC<br>wi oe ' '<br>25 1 ' ! !<br>15 100<br>* TIME (SEC)<br>**----- End of picture text -----**<br>


## Standard Packaging 

P/N Explanation and Ordering Information 

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| Buk | [_—ReeVTape] |<br>P/N Code Pcs/Reel |P/N Code PTC series<br>OZRBOOSOFF<br>0ZRBO110FF | HOLD Rating<br>OZRBO135FF Refer to to Part Number and<br>[ieee<br>OZRBO250FF Electrical<br>OZRBO300FF F = Standard Design<br>eee]OZRBO400FF wm | ta | 1500 | ae MechanicalA toA to to Z (except F) = (except F) = F) = =Features Special, customer spec, DCR sort, etc.<br>OZRBOSOOFF | 1000 | 1A | 1000 | 2A | —_| F= Standard Desion Standard Desion<br>OZRBO600FF A to Z Z (except F) =<br>OZRBOSOOFF Ser standard 2 2<br>**----- End of picture text -----**<br>


OZRB XK OX X XK PTC series es ee | HOLD Rating Refer to to Part Number and IH Rating in Electrical Characteristics Table on P.1. Electrical Characteristics F = Standard Design MechanicalA toA to to Z (except F) = (except F) = F) = =Features Special, customer spec, DCR sort, etc. F= Standard Desion Standard Desion A to Z Z (except F) = Special, customer spec, lead forming, etc. Ser standard 2 2 ty Specifications subject to change without notice Bel Fuse Inc. +1 201.432.0463 206 Van Vorst Street techhelp@belf.com Jersey City, NJ 07302 USA belfuse.com 

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© 2017 Bel Fuse, Inc. OZRB Jan2017 4/4