0ZAF0005FF28

0ZAF Series 

## Surface Mount PTC 

0ZAF Series – 2920 Chip RoHS Compliant 

## **Product Features** 

- 2920 Dimension, Surface mountable, Solid state, Faster time to trip than standard SMD devices. 

- Full compliance with EU Directive 2011/65/EU and amending directive 2015/863 

- AEC-Q Compliant 

- Meets Bel automotive qualification* 

- - Largely based on internal AEC-Q test plan 

## **Operating (Hold Current) Range** 

50mA – 160mA 

## **Maximum Voltage** 

240VAC/250VAC (per table) 

## **Temperature Range** 

- -40 °C to 85 °C 

## **Agency Approval** 

TUV (Std. EN/IEC  60738-1/60738-1-1 and EN/IEC 60730-1, Cert. R50102117) UL Recognized Component (Std. UL1434, File E305051) 

## **AEC-Q Compliant** 

LEAD FREE = 

> [HALOGEN FREE =] 

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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||Power<br>Current<br>~~rr~~<br>~~Coe~~<br>||Time<br>~~rr~~<br>~~Coe~~<br>||Rmin<br>~~Coe~~<br>||Rmax<br>~~ee~~<br>~~Coe~~<br>|}|R1max<br>~~ee~~<br>~~Coe~~<br>|}~~|~~|~~eee~~<br>~~Coe~~<br>~~ee~~<br>|~~eee~~<br>~~Coe~~<br>~~™~~|
|||IH, A<br>~~Coe~~<br>~~PF~~|<br>~~ee~~<br>|IT, A<br>~~Coe~~<br>|<br>~~ee ee~~<br>|Imax, A<br>~~Coe~~<br>|<br>~~ee~~<br>|Vmax, Vac<br>~~Coe~~<br>|<br>~~es eee~~<br>|VI-max, Vac<br>~~Coe~~<br>|<br>~~eee~~<br>|Pd, W<br>~~rr~~<br>~~Coe~~<br>|<br>~~es~~<br>|A<br>~~rr~~<br>~~Coe~~<br>|<br>~~ee~~<br>|Sec<br>~~rr~~<br>~~Coe~~<br>|<br>~~Os~~<br>|Ohms<br>~~Coe~~<br>|<br>~~ee~~<br>|Ohms<br>~~ee~~<br>~~Coe~~<br>|}<br>~~ee~~<br>|Ohms<br>~~ee~~<br>~~Coe~~<br>|}~~|~~<br>~~ee~~<br>|||
|A 0ZAF0005FF28<br>~~a~~<br>~~a~~<br>~~ee~~|A 0ZAF0005FF28<br>~~PF~~<br>~~a~~<br>~~a~~<br>~~ee~~|0.05<br>~~PF~~ |<br>~~ee~~<br>~~ee~~<br>|0.12<br>|<br>~~ee ee~~<br>~~ee a~~<br>|1.0<br>|<br>~~ee~~<br>~~a~~<br>|240<br>|<br>~~es eee~~<br>~~ee~~<br>|250<br>|<br>~~eee~~<br>~~ee~~<br>|1.5<br>|<br>~~es~~<br>~~ee~~<br>|0.25<br>|<br>~~ee~~<br>~~ee~~<br>|15.00<br>|<br>~~Os~~<br>~~ee~~<br>|10.0<br>|<br>~~ee~~<br>~~ee~~<br>|55.0<br>|}<br>~~ee~~<br>~~ee~~<br>|70.0<br>|} ~~|~~<br>~~ee~~<br>~~ee~~<br>|Y<br>~~ee~~<br>~~ee~~<br>|Y<br>~~™~~|
|B<br>~~a~~<br>~~ee~~<br>~~a~~|0ZAF0008FF28<br>~~a~~ <br>~~ee~~<br>~~a~~|0.08<br>~~ee~~<br> ~~ee~~<br>~~es ee~~|0.19<br>~~ee ee~~<br>~~ee a~~<br>~~ee~~|1.2<br>~~ee ~~<br>~~a~~<br>~~es~~|240<br> ~~es eee~~<br>~~ee~~<br>~~es~~|250<br>~~eee ~~<br>~~ee~~<br>~~es~~|1.5<br> ~~es ~~<br>~~ee~~<br>~~re~~|0.40<br> ~~ee~~<br>~~ee~~<br>~~es~~|15.00<br>~~Os ~~<br>~~ee~~<br>~~es~~|6.0<br> ~~ee ~~<br>~~ee~~<br>~~es es~~|16.0<br> ~~ee~~<br>~~ee~~<br>~~es~~|25.0<br>~~ee ~~<br>~~ee~~<br>~~es~~|Y<br> ~~ee~~<br>~~ee~~<br>~~es~~|Y|
|C 0ZAF0012FF28<br><br>~~ee~~<br>~~a~~<br>~~ee~~|C 0ZAF0012FF28<br> <br>~~ee~~<br>~~a~~<br>~~ee~~|0.12<br> ~~ee~~<br>~~es ee~~<br>~~ee~~<br>|0.30<br>~~ee a~~<br>~~ee~~<br>~~ee i~~<br>|1.2<br>~~a~~<br>~~es~~<br>~~i~~<br>|240<br>~~ee~~<br>~~es~~<br>~~es~~<br>|250<br>~~ee~~<br>~~es~~<br>~~es~~<br>|1.5<br>~~ee~~<br>~~re~~<br>~~ee~~|0.60<br>~~ee~~<br>~~es~~|15.00<br>~~ee~~<br>~~es~~<br>~~se~~|6.0<br>~~ee~~<br>~~es es~~<br>~~se~~|14.0<br>~~ee~~<br>~~es~~<br>~~se~~|20.0<br>~~ee~~<br>~~es~~<br>~~ee~~|Y<br>~~ee~~<br>~~es~~|Y|
|D<br><br>~~ee~~<br>~~a~~<br>~~ee~~|0ZAF0013FF28<br> <br>~~ee ~~<br>~~a~~<br>~~ee~~|0.13<br> ~~ee ~~<br> ~~es ee~~<br>~~ee~~<br>~~ee~~|0.32<br> ~~ee a~~<br>~~ee ~~<br>~~ee i~~<br>~~ee~~|1.2<br>~~a ~~<br> ~~es ~~<br>~~i~~<br>~~ee es~~|240<br> ~~ee~~<br> ~~es ~~<br>~~es~~<br>~~es~~|250<br>~~ee ~~<br> ~~es ~~<br>~~es~~<br>~~es~~|1.5<br> ~~ee~~<br> ~~re ~~<br>~~ee~~<br>~~re~~|0.65<br>~~ee ~~<br> ~~es ~~<br>~~re~~|15.00<br> ~~ee~~<br> ~~es~~<br>~~se~~<br>~~ds~~|2.0<br>~~ee ~~<br>~~es es~~<br>~~se~~<br>~~ds~~|6.0<br> ~~ee ~~<br>~~es ~~<br>~~se~~<br>~~re~~|12.0<br> ~~ee ~~<br> ~~es ~~<br>~~ee~~<br>~~ed~~|Y<br> ~~ee~~<br> ~~es~~|Y|
|E 0ZAF0016FF28<br>~~ee~~|E 0ZAF0016FF28<br>~~ee~~|0.16<br>~~ee ~~<br> ~~ee~~|0.37<br> ~~ee i~~<br>~~ee~~|2.0<br>~~i~~<br>~~ee es~~|240<br>~~es~~<br>~~es~~|250<br>~~es ~~<br>~~es~~|1.5<br> ~~ee~~<br>~~re~~|0.80<br>~~re~~|15.00<br>~~se~~<br>~~ds~~|2.0<br>~~se~~<br>~~ds~~|6.0<br>~~se ~~<br>~~re~~|11.0<br> ~~ee~~<br>~~ed~~|Y|Y|



Imax     Maximum fault current device can withstand at rated voltage (Vmax) without damage. Pd        Typical power dissipated-type amount of power dissipated by device when in tripped state in 23 °C still air environment. Rmin     Minimum device resistance at 23 ℃ prior to tripping. 

Rmax   Maximum device resistance at 23 ℃ . 

R1max  Maximum device resistance at 23 ℃ measured 1 hour after tripping or reflow soldering of 260 ℃ for 20 seconds. 

Specifications subject to change without notice 

BCgees &: bel SOLUTIONSPOWER & 

**belfuse.com/circuit-protection** 

**2** / **4** 

## Type 0ZAF Series 

## **PTC’s – Basic Theory of Operation / “Tripped” Resistance Explanation** 

A Bel PTC consists of a block of polymeric material containing conductive carbon granules which is sandwiched between two conductive metal plates.  When this polymer block reaches approximately 125C, either due to current passing through it via conductive chains of carbon particles or due to an external heat source; it swells volumetrically.  This expansion breaks apart a majority of the chains of carbon granules that run randomly between the two conductive plates.  This behavior results in a sharp increase in resistance across the two plates which all but eliminates current flow through the device, allowing just enough residual current flow to maintain the block’s internal temperature at 125C.  Once this “tripped” state current is cut off, the polymer brick cools and shrinks to its original size, thereby allowing its broken carbon chains to reestablish themselves and permit the part to return to its low resistance state.  Once cooled to room ambient, the PTC will once again exhibit a resistance less than its “R1max” rating. 

At currents below the device IHOLD rating, AND at temperatures below 100C, the PTC maintains a resistance value below its R1 MAX rating. 

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 = E²/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 = 60²/1 = 3,600 ohms 

This same tripped device when used to protect a 12V circuit would now present an apparent resistance of: R = 12²/1 = 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. 

## **Average Time Current Characteristic Curve at 23°C** 

The Average Time Current Characteristic Curve and Temperature Rerating Curve are affected by a number of variables and these curves are provided for guidance only. 

SERS » POWER Op: bel SOLUTIONS & 

Specifications subject to change without notice 

**Bel Fuse Inc.** +1 201.432.0463 206 Van Vorst Street Bel.US.CS@belf.com Jersey City, NJ 07302 USA **belfuse.com/circuit-protection** 

© 2023 Bel Fuse, Inc. 

Rev. 0ZAF May2023 

**3** / **4** 

## Type 0ZAF Series 

## **Pad Layout                                                                       Termination Pad Materials** 

The dimensions in the table below provide the                           Pure Tin Recommended pad layout. 

|P|P|S|S|W|W|
|---|---|---|---|---|---|
|Nominal||Nominal||Nominal||
|mm|Inch|mm|Inch|mm|Inch|
|5.10|0.201|2.30|0.091|5.60|0.221|



## **Mechanical Dimensions and Marking** 

|Part Number<br>~~a~~|Dimensions|Dimensions|Marking Code|
|---|---|---|---|
||C<br>~~ee~~<br>~~|~~||“b”,IH code<br>~~ee~~<br>~~|be~~|
||Min<br>~~|~~<br>~~ee~~|Max<br>~~|~~<br>~~|~~<br>~~ee~~|~~|~~<br>~~|be~~|
|0ZAF0005FF28<br>~~a~~|2.00<br>~~|~~<br>~~ee~~|2.60<br>~~|~~<br>~~|~~<br>~~ee~~|0005<br>240<br>~~|~~<br>~~| be~~|
|0ZAF0008FF28<br>~~a~~|2.00<br>~~ee ~~<br>~~ee~~|2.60<br> ~~ee~~|0008<br>240|
|0ZAF0012FF28<br>~~ee~~<br>~~rr~~|2.00<br>~~ee~~<br>~~ee~~<br>~~a~~|2.60<br>~~ee~~<br>~~ee~~|0012<br>240<br>~~ee~~<br>~~ee~~|
|0ZAF0013FF28<br>~~ee~~<br>~~rr~~|2.00<br>~~ee~~<br>~~ee~~<br>~~a~~|2.60<br>~~ee~~<br>~~ee~~|0013<br>240<br>~~ee~~<br>~~ee~~|
|0ZAF0016FF28<br>~~rr ~~|2.00<br> ~~a~~|2.60<br>~~ee~~|0016<br>240<br>~~ee~~|



## **Temperature Derating Table** 

||Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|Temperature Derating Table|
|---|---|---|---|---|---|---|---|---|---|---|
|**I Hold Value**|**-40**|**-20**|**0**|**23**|**30**|**40**|**50**|**60**|**70**|**85**|
|0ZAF|158%|140%|120%|100%|93%|82%|72%|63%|54%|40%|



## **Thermal Derating Curve Cautionary Notes** 

## Temperature Rerating Curve 

**==> picture [222 x 132] intentionally omitted <==**

**----- Start of picture text -----**<br>
180%<br>160% | | | | | hd] hd] rT rT TT tT<br>140% aeee<br>120% | |~satt<br>100% | | | | [ee| ct rt T TT tT<br>80% P| | tT | rch | TT<br>60% PF | | | dT dT | rE EAS<br>40% PF | | dT hd Thr hd] rE rE rT TR<br>20% PF | | | dT dT dT rE rT TE Tt<br>0% Pt ttt tT | tT tT TE Tt<br>-40 -20 0 20 40 60 80<br>Temperature( ° C)<br>Percent of Hold and Trip Current<br>**----- End of picture text -----**<br>


1. Operation beyond the specified maximum ratings or improper 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. If potting is mandated, avoid rigid potting compounds as they will encase the PTC and prevent it from volumetrically expanding to properly respond to a trip event. 

6. MSL: 2a (According to IPC J-Std-020). 

## BOsee bel SOLUTIONSPOWER & 

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** 

© 2023 Bel Fuse, Inc. 

Rev. 0ZAF May2023 

**4** / **4** 

## Type 0ZAF Series 

## **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|Average Ramp-Up Rate (Tsmax to Tp) 3°C/second max|
|Preheat :<br>Temperature Min  (Tsmin)<br>Temperature Max (Tsmax)<br>Time (tsminto tsmax)|150°C<br>200°C<br>60-180 seconds|
|Time maintained above:<br>Temperature(TL)<br>Time (tL)|217°C<br>60-150 seconds|
|Peak/Classification Temperature(Tp) :   260|Peak/Classification Temperature(Tp) :   260°C|
|Time within 5°Cof actual Peak :<br>Temperature (tp)|20-40 seconds|
|Ramp-Down Rate :|6°C/second max.|
|Time 25°Cto Peak Temperature :|8 minutes max|



## Solder Reflow 

Due to “lead free / RoHS compliant ” 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** 

|PartNumber|Tape/ReelQty|
|---|---|
|0ZAF0005FF28<br>Thru<br>0ZAF0016FF28|800|



800 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.** 

**Bel Fuse Inc.** +1 201.432.0463 206 Van Vorst Street Bel.US.CS@belf.com Jersey City, NJ 07302 USA **belfuse.com/circuit-protection** 

© 2023 Bel Fuse, Inc. 

Rev. 0ZAF May2023