0ZCM BEL
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0603 Chip
bel Surface Mount PTC wrcscsmimsnisornie OZCM Series 0ZcMm 0ct20130 [HF]@ 0ZCM Series Fuse & Als {a 9 - 15V (per table) F 40°C to 85°C D Be SD 4 TUV (Std. EN60738-1-1 , Cert. R50102117) UL 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. finitthe current to8 amps within cli limit the current to 8 amps within 5 All high-density boards seconds , per ANSI/NFPA 70, “National
0603 Chip Size , Fast Trip Time, Low DCR Resistance [nF
HALOGEN FREE = LEAD FREE = 50mA - 200mA Ti Rated [Typical Part Number Current Voltage | Power| Rmin | Rimax_| a ja [ma | A | Sec | imax.A | Vmax, vac] Paw | ohms | Ohms | Tov [alezcwooosera6| cos | oss | aso [ow | | 15 | os | as | mo | y |v | |e|szemooosrrze| oo | o20 | oso | oso | 40 | 15 | os | 280 | oo | vy |v | [clezcmooserrac| oo | 2s | aro | ow | | 1 | 0s | ase | eo | y |v | |p|ezemoorzrrze| 012 | oso | oso | oro | 40 | 9 | os | to | seo | vy | vy | |elszemoorsrrac| ox | oao | 100 | oso | 40 | 0 | os [| 100 | 42 [ vy |v | [r[ozcwonaorrac) 020 | 04s | 200 | ox | |» | os | ass | aso) vy | v_| IH Hold Current-maximum current at which the device will not trip in still air at 23°C. br 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 pst Compt aa OZCM Series HEI@® 02cm oct2013¢ 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 = E42/R. Thus the approximate resistance of a “Tripped” PTC can be determined by: R = E*2M, 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 = 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) A BCDEF ee ee O —— SH 2 ——aes i he es © NN 5 po A WN og NN NT Eo Bee A - ee es A ee es VY po ee AANA ey oot LLL TN SSS SESS SSE Te SSS See oo NN ooo LL LL TTT NTF TT 0.01 0.1 1 Fault current (A) 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
0603 Chi
be | Surface Mount PTC persscompianasicgentine aus OZCM Series =@® Thermal Derating Curve Cautionary Notes . - 4. Operation beyond the specified maximum ratings Hold & Trip Current and Thermal Derating Curve or improper use may result in damage and possible electrical arcing and/or flame. 300% 2. These Polymer PTC (PPTC) devices are intended - for protection against occasional overcurrent! § overtemperature fault conditions and may not be =e 250% = suitable for use in applications where repeated and) OE 20m is 3. Avoid contact of PTC device with chemical solvent. ze [| Prolonged contact may adversely impact the PTC 22 d te perfa 7 performance. 180% ¢ = 4. These PTC devices may not be suitable for use in $0 | {T] circuits with a large inductance, as the PTC trip can or T generate circuit voltage spikes above the PTC rated BH 100% i voltage. £2 aaa al 5. These devices are intended for use in DC voltage Se sm —, applications only. Use in AC voltage applications
8 D C a esistance sta should be first discussed with Bel Fuse engineering
° 6. Not recommended for use on potted or conformal a % coated PCB's. Restriction of free air flow could affect 40 20 o 20 40 60 80 electrical performance and/or result in device failure Consult Bel Fuse engineering. Ambient Temperature (C) 7. In the “Indeterminate Performance / grey zone”, — . tripping may occur but cannot be relied upon. For Hold Current === Trip Current ‘special circumstances considering use within this region, consult Bel Fuse Engineering. 8. MSL : 2a (According to IPC J-Std-020). ‘Mechanical Dimensions PTC Marking (o.10-0:60mm0) Ke E (0.08-0.40mm) Di T Part Number | Marking Code B (0.45-1.00mm) ozcmooosrr2G | ou | r , | ezewoorrrs | a | (1.40-1.80mm) SEC MmO IE EZS Top and Bottom View Oc CIO 12F E26) oe — + ozcmoozorr2s | f | bg Side View i (0.35-0.75mm) The dimensions in the table below provide the recommended Matte Tin - Plated Copper pad layout. W P Nominal sm [ inch | wm [ inch | mm | inch | soi Po Speciteation subject change without notice ee 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
0608 Chi
Surface Mount PTC RoH98 Compliant & Halogen Free OZCM Series @ 0z¢M 0¢t20130 Solder Reflow and Rework Recommendations [ProfileFeature __—=—_—s—CC_—=s[ Pb-Free Assembly ’ Average Ramp-Up Rate (Tsmax to Tp)|3 ‘C/second max. Tp ee ener oe ‘critical Zone] Preheat: {umn | ‘Temperature Min (Tsmin) 150 °C i [Ramp-uph ‘Temperature Max (Tsmax) 200 °C 1 = ‘Time (tsmin to tsmax) 60-180 seconds £ ‘Time maintained above: s all ‘Temperature(T.) 217 "Cc s fp Time (u) 160-150 seconds & [Ramp-down! Peak/Classification Temperature(Tp) : 2 Time within 5°C_ of actual Peak : lore | ‘Temperature (tp 20-40 seconds 2s: H [Ramp-Down Rate: [6 ‘Ci/second max. |} t 25°C to Peak yg a Time 25 °C_to Peak Temperature : 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. 1.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 4060 fuses In 7 Inches OZCM = OXXX_-X_X_XX dia. Reel, 8mm wide in en ee tape, 4mm pitch, per PTC series —— | E1A-481 (equivalent OZCM, 0608 Size IEC-286 part 3). {HOLD Rating $$ 4,000 Referto Part Number and I Rating in Elecuical Characteristics Table on Pat. AtoZ (except F) = Special, customer spec, DCR sort, ete. Mechanical Features — F = Standard Design AtoZ (except F) = Special, customer spec, lead forming, etc. Tape & Reel Qty ‘See standard packaging Specineatons subject change without novice 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