0ZCB_13 BEL
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Technical content
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1210 Chip
bel Surface Mount PTC sissconiasnisnie 0ZCB Apr2013D OZCB SETS 4s, rocommended tor new applications. Please use 0ZCH [HF]@ 0ZCB Series Fuse & Ades ‘a 6-60V (per table) & z 40°C to 85°C % new eS Agency Approval BOY F TUV (Std. EN60738-1-1 , Cert. R50102117) we UL Component (Std. UL1434, File E305051) UL Conditions of Acceptability: 1.These devices have been investigated for Not as shown, see marking code drawing use in safety circuits and are suitable as a limiting device. : 5 limit the current to 8 amps within 5 All high-density boards seconds , per ANSI/NFPA 70, "National
1210 Chip Size , Fast Trip Time, Low DCR Resistance
savoon nee [AF 50mA - 2A vsso mee-(PB) Electrical Characteristics (23°C) Max Time to Trip Rated | Typical| Resistance Tolerance | Agency Approvals [wa | ma | «| seo | mma [van vae| Paw] ome | ome | eccenowrrae | eso | ozs [ oa | 150 | a | oo | ono | s4o0 | sso | vy |v | Ih Hold Current-maximum current at which the device will not trip in still air at 23°C. Ir 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 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 + Tel: 201-432-0463 « Fax: 201-432-9542 - E-Mail: belfuse@belf.com Website: www.belfuse.com
Surface Mount PTC RoHS Compliant & Halogen Free OZCB Series (HEI@ OZCB Apr2013¢ 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 and 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 = E2/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... APTC with a Typical Power of 1 watt protecting a circuit using a 60V supply will demonstrate an apparent, tripped resistance "R" of: R = 602/1 = 3,600 ohms This same tripped device when used to protect a 12V circuit would now present an apparent resistance of: R = 1292/1 = 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. (See Elec. Characteristics Table for P/N - Curve Correlation) 6 c Do: FGH oJ
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=———aitast.. tat = — oe POP OAS wo LAL ATEN ANAT AAT TT _—— = ES os | a PSST ETN FANS e , LALNENNA_IAANSSOET ° FAIRE SS NSS e SS PS SO SS A SS 201 belt tN EE NINN NEN I DS SY F — a Se a es nae fT ANT NEN NTO DK NINN TT oot Lf} | NN NINEN NAN NT FENN SISOS SENSES oor LI I TIT NN TIWANNK TN NWN 01 1 10 100 Fault Current (A) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 + Tel: 201-432-0463 + Fax: 201-492-9542 + E-Mail: belfuse@belf.com Website: www.belfuse.com
ibe i Surface Mount PTC persscompiassscgenrne (0ZCB Apr2013D 0ZCB Series =@® Thermal Derating Curve Cautionary Notes 4. Operation beyond the specified maximum ratings Hold & Trip Current and Thermal Derating Curve ‘or wiproper'ise tay résult ln darkage’and posslbie, electrical arcing and/or flame. 300% 2. These Polymer PTC (PPTC) devices are intended : OT) ee S ssoy | overtemperature fault conditions and may not be = LT] suitable for use in applications where repeated and) ge psy Device p and prote t or prolonged fault conditions are anticipated. 5 200% = 3. Avoid contact of PTC device with chemical solvent. Be LT] Prolonged contact may adversely impact the PTC 26 ° ate perfdrmance™ performance. =O 150% | a 4, These PTC devices may not be suitable for use in S32 i n MT NTT circuits with a large inductance, as the PTC trip can 2. = 4m cS -——, |_| L cH || generate circuit voltage spikes above the PTC rated ee, “ voltage. Be TTTTTTTTTT TERRELL |< Rotinmeecsemrermr ct @ 7 som Devic rn Lasts iste applications only. Use in AC voltage applications
2 P should be first discussed with Bel Fuse engineering
& 6, Not recommended for use on potted or conformal o% coated PCB's. Restriction of free air flow could affect ~40 20 ° 20 40 60 80 electrical performance and/or result in device failure Ambient Temperature (‘C) Consult Bel Fuse engineering. 7. In the “Indeterminate Performance / grey zone”, ——_ — A tripping may occur but cannot be relied upon. For Hold Current Trip Current } special circumstances considering use within this region, consult Bel Fuse Engineering. All dimensions in mm. wae Pr | RR "bbcode, a a =f estessom) | rar tnber_|_Win_| Wax | T WZco0OosFFE| 08 | 145] [_PartNumber | Ty Code | B (2.35-2.80mm) | ozcmomFFE | 0s | 145] |O2CB0005rF2e | co | i acpomnFr2e | 0a | 0as | | $2CBootoFF2e 0ZCBOO20FF2E (.00-3.43mm) ozcowesarr26 | 03 | 015] | 92080035FF26 | Po Top and Bottom View ozcoun7sFFee | 03 | 070 | }0ZCBO0sOFF26 OZcBOTOFFZE | 06 | 100 | |CZCBOOTSFFZC | 02CB0110FF2E L ozcporsorr2e | 05 | 0.90 | a - wcBorsrFe | 08 | 140 _| ozcpoisorrze | s_ | Side View ¢ acsane 0ZCBO175FF2E [| ozcpozoorr2e | 2 ‘| Termination Pad Materials The dimensions in the table below provide the recommended Matte Tin - Plated Copper pad layout. ‘S P S ‘Specifications subject to change without notice Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 - Tel: 201-432-0463 + Fax: 201-492-9542 + E-Mail: belfuse@belf.com Website: www.belfuse.com
Surface Mount PTC RoHS6 Compliant & Helogen-Free OZCB Series (HEI@D 0ZCB Apr2013D Solder Reflow and Rework Recommendations ave ge Ramp-Up Rate (Tsmax to Tp 1p = ee ee heat : amp] <| 10 Tt ‘Temperature Min (Tsmin) 150 °C i Ramen ‘Temperature Max (Tsmax) 200 *C 1 | aan ‘Time (tsmin to tsmax) 160-180 seconds 2 Pave ‘Time maintained above: = EE \\Temperature(T.) 217 ‘c s Time (u) {60-150 seconds — y~-- [Ramp-down] Peak/Classification Temperature(Tp):|260 ‘C || ‘Time within 5°C of actual Peak : Goes | ‘Temperature (tp 20-40 seconds = H t25C to Peak “Tig Time 25°C to Peak Temperature: |Sminutesmax. _| Solder Reflow Due to " lead free / ROHS6 " 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. 14.Recommended reflow methods ; IR , vapor phase oven , hot air oven. 2. Not Recommended For Wave Solder / Direct Immersion. 3. Recommended maximum ; paste thickness is 0.25mm. 4. Devices are compatible with standard industry cleaning solvents and methods. 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/Ree! Oty 4000 or 3000 fuses in 7 0ZCB OXXX X _X XX OZCBOOO5FF2E inches dia. Reel, 8mm —T oat.CO Fhe wide tape, 4mm pitch, PTC series | per ElA-481 (equivalent | 02ZCB, 1210 size 0ZCBO020FF2E IEC-286 part 3). 1 HOLD Rating i | 0ZCBO03SFF26 Refer to Part Number and Rating in Electrical Chavactetistics Table on P-1. Thru 4,000 Electrical Characteristics F= Standard Design OZCBOO75FF2G ‘AtoZ (except F) = Special, customer spec, DCR sort, etc. F = Standatd Design OZCBOISOFF2E | 3,000__—‘| ‘AtoZ (except F) = Special, customer spec, lead forming, et. ozcBor7sFF2e | 3,000 | Tape & Reel Qty See standard packaging Lozcpozcorr2e | 3.000 | ‘Specifications subject to change without notice CORPORATE OFFICE FAR EAST OFFICE EUROPE OFFICE EUROPE Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd. Bel Stewart GmbH 206 Van Vorst Street 8/F Luk Hop Industrial Building Preston Technology Management Centre Industriestrasse 20 Jersey City, NJ 07302 8 Luk Hop Street Marsh Lane, Suite F15 61381 Friedrichsdorf Tel 201-432-0463 San Po Kong Preston, Lancashire, PR1 8UQ Germany Fax 201-432-9542 Kowloon, Hong Kong United Kingdom Tel 49-6172-9552-0 E-Mail: belfuse@belf.com Tel 852-2328-5515 Tel 44-1772-556601 Fax 49-6172-9552-40 Website: www. belfuse.com Fax 852-2352-3706 Fax 44-1772-561008