# TVS Diode, AK20-Y Series, Bidirectional, 66 V, 130 V, Axial Leaded, 2 Pins

![Product image](https://novapart.co/image/farnell:3996850/)

**URL**: https://novapart.co/products/AK20-066C-Y/tvs-diode-ak20-y-series-bidirectional-66-v-130
**SKU**: AK20-066C-Y
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €25.7000
**Stock**: 50+
**Lead Time**: 92 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| No. Of Pins | 2Pins |
| Tvs Polarity | Bidirectional |
| Product Range | AK20-Y Series |
| Qualification | - |
| Diode Mounting | Through Hole |
| Diode Case Style | Axial Leaded |
| Clamping Voltage Max | 130V |
| Reverse Standoff Voltage | 66V |
| Maximum Breakdown Voltage | 80V |
| Minimum Breakdown Voltage | 72V |
| Operating Temperature Max | 125°C |
| Peak Pulse Power Dissipation | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3996850/)

**TVS Diodes** Axial Leaded - 20kA > AK20-Y Series 

~~RoHS Pb~~ ~~**e4** IMWOO~~ 

## - AK20 Y Series 

## **Descriptions** 

The AK20-Y series of high power TVS diode is specially designed for meeting severe surge test environment of both AC and DC line protection applications. It features a very fast response and ultra low clamping characteristics as compared to MOVs (Metal Oxide Varistors). It accomplishes this by virtue of the Littelfuse Foldback[TM] technology,which provides a clamping voltage lower than the avalanche voltage (but above the rated working voltage); therefore, any voltage rise due to increased current conduction is maintained at a minimum magnitude, providing the best possible protection level.  These AK components can be connected in series and / or parallel 

to create a very high surge current protection solution. 

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**----- Start of picture text -----**<br>
Agency Recognitions Features<br>EE<br>Agency Agency File Number • No wear-out nor degrade  •  IEC 61000-4-2 ESD 15 kV<br>surge rating over multiple  (air), 8 kV (contact) rating<br>E128662 transient events as long  •  Lightning, 20 kA (8/20 as<br>oo<br>as within surge capability defined in IEC 61000-4-5<br>• Ultra high power rating 2 [nd]  Edition)<br>• Very low clamping voltage •  EFT protection of data<br>Maximum Ratings and Thermal Characteristics  • Both reflow and wave  lines in accordance with<br>(TA=25 [O] C unless otherwise noted) soldering capable IEC 61000-4-4<br>Parameter Symbol Value Unit • Ultra compact: less  • UL Recognized<br>than one-tenth the size  compound meeting<br>Operating Storage Temperature Range TSTG -55 to 150 °C of traditional discrete  flammability rating V-0<br>Operating Junction Temperature Range TJ -55 to 125 ºC solutions • Halogen-free and RoHS<br>Current Rating [1] IPP 20 kA • Sharp breakdown voltage compliant<br>Note: • Low slope resistance • Glass passivated junction<br>1.  Rated IPP measured with 8/20μs pulse as defined in IEC 61000-4-5 2 [nd]  edition. [[nd]]<br>**----- End of picture text -----**<br>


- Bi-directional • Pb-free E4 means 2[[nd]] level interconnect is Pb-free 

- • Foldback technology for and the terminal finish 

- superior clamping factor material is silver (IPC/ 

- • Symmetric lead width JEDEC J-STD-609A.01) 

- for easy soldering during assembly 

**Functional Diagram** Lo 

Bi-directional 

## **Electrical Characteristics (TA=25°C unless otherwise noted)** ~~LT~~ 

|**Part**<br>**Numbers**|**Part**<br>**Marking**|**Standoff**<br>**Voltage**<br>**(VSO) **<br>**Volts**|**Max.**<br>**Reverse**<br>**Leakage**<br>**(IR) @VSO**<br>**(µA)**|**Typical**<br>**IR @**<br>**85OC **<br>**(µA)**|**Reverse**<br>**Breakdown**<br>**Voltage (VBR) **<br>**@ IT**<br>**Min**<br>**Volts**<br>**Max**<br>**Volts**|**Test**<br>**Current**<br>**IT**<br>**(mA)**|**Max. Clamping Voltage**<br>**VCL @ Peak Pulse Current (IPP) **<br>**VCL**<br>**(8/20μs)**<br>**Volts**<br>**IPP**<br>**(8/20μs)**<br>**Amps**<br>**VCL**<br>**(10/350μs)**<br>**Volts**<br>**IPP**<br>**(10/350μs)**<br>**Amps**|**Max. Clamping Voltage**<br>**VCL @ Peak Pulse Current (IPP) **<br>**VCL**<br>**(8/20μs)**<br>**Volts**<br>**IPP**<br>**(8/20μs)**<br>**Amps**<br>**VCL**<br>**(10/350μs)**<br>**Volts**<br>**IPP**<br>**(10/350μs)**<br>**Amps**|**Max. Clamping Voltage**<br>**VCL @ Peak Pulse Current (IPP) **<br>**VCL**<br>**(8/20μs)**<br>**Volts**<br>**IPP**<br>**(8/20μs)**<br>**Amps**<br>**VCL**<br>**(10/350μs)**<br>**Volts**<br>**IPP**<br>**(10/350μs)**<br>**Amps**|**Max. Clamping Voltage**<br>**VCL @ Peak Pulse Current (IPP) **<br>**VCL**<br>**(8/20μs)**<br>**Volts**<br>**IPP**<br>**(8/20μs)**<br>**Amps**<br>**VCL**<br>**(10/350μs)**<br>**Volts**<br>**IPP**<br>**(10/350μs)**<br>**Amps**|**Max. Temp**<br>**Coefficient**<br>**of VBR**<br>**(%/OC)**|**Max.**<br>**Capacitance**<br>**0V Bias**<br>**10kHz**<br>**(nF)**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|AK20-016C-Y|20-016C|16|5|15|17.5<br>19.3|10|30|20,000|28|3,200|0.1|50|
|AK20-058C-Y|20-058C|58|5|15|64.0<br>70.0|10|120|20,000|107|3,200|0.1|15|
|AK20-063C-Y|20-063C|63|5|15|68.0<br>75.0|10|125|20,000|110|3,200|0.1|12|
|AK20-066C-Y|20-066C|66|5|15|72.0<br>80.0|10|130|20,000|120|3,200|0.1|12|
|AK20-076C-Y|20-076C|76|5|15|85.0<br>95.0|10|160|20,000|145|3,200|0.1|12|



**Note:** using 8/20 waveshape as defined in IEC 61000-4-5 2[nd] edition 

©2020 Littelfuse, Inc. Specifications are subject to change without notice. Revision: JC.12/28/20 

**TVS Diodes** Axial Leaded - 20kA > AK20-Y Series 

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## **Soldering Parameters** 

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Reflow Condition Lead–free assembly<br>- Temperature Min (Ts(min)) 150°C  TP tp<br>Pre Heat - Temperature Max (T- Time (min to max) (ts(max)s) ) 200°C60 – 120 secs TL Ramp-up t L Critical ZoneTL to TP<br>Average ramp up rate (Liquidus Temp (TL) to peak 3°C/second max Ts(max)<br>TS(max) to TL - Ramp-up Rate 3°C/second max Ts(min) Ramp-down<br>Reflow - Temperature (TL) (Liquidus) 217°C  Preheat t s<br>- Time (min to max) (ts) 60 – 150 seconds<br>Peak Temperature (TP) 260 [+0/-5]  °C 25˚C t 25˚C to Peak<br>Time within 5°C of actual peak Temperature (tp) 30 seconds max Time (t)<br>Ramp-down Rate 6°C/second max<br>Time 25°C to peak Temperature (TP) 8 minutes max. Physical Specifications<br>Do not exceed 260°C<br>Weight Contact manufacturer<br>Case UL Recognized epoxy meeting flammability<br>rating V-0<br>Terminal Silver plated leads, solderable per<br>MIL-STD-750 Method 2026<br>Flow Soldering (Solder Dipping)<br>Wave soldering condition Pb - Free assembly<br>t P<br>- Temperature Min  140°C<br>Pre Heat - Temperature Max  160°C T P<br>Ramp-up<br>Time to Pre-Heat Temp 60-150 seconds<br>Average ramp up rate to Pre-Heat Temp 5°C/second max<br>Peak Temperature 260+0/-5 °C<br>T S<br>Average ramp up rate (Tpre-heat to Tp) 5°C/second max<br>Ramp Down<br>Time within actual peak Temperature Max 6 seconds Pre-heat<br>Ramp-down Rate 5°C/second max<br>time to peak temperature<br>Time (t)<br>Ratings and Characteristic Curves (TA=25°C unless otherwise noted)<br>Figure 1- Peak Power Derating Figure 2 - Typical VBR Vs Junction Temperature<br>12<br>10<br>100<br>8<br>80 6<br>4<br>60 2<br>0<br>40 -2<br>-4<br>20<br>-6<br>-8<br>0<br>-50 -25 0 25 50 75 100 125<br>0 25 50 75 100 125<br>TJ - Initial Junction Temperature (ºC) Junction Temperature(Tj )<br> Change<br>BR<br>Percent of V<br>Percent of Rated Value<br>Temperature (T)<br>Temperature<br>**----- End of picture text -----**<br>


©2020 Littelfuse, Inc. Specifications are subject to change without notice. 

Revision: JC.12/28/20 

**TVS Diodes** Axial Leaded - 20kA > AK20-Y Series 

**==> picture [93 x 32] intentionally omitted <==**

## **Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)** 

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Figure 3 - Pulse Waveform Figure 4 -Surge Response (8/20 Surge Current Waveform)<br>tr = rise time to peak value<br>Peak td = decay time to half value Voltage<br>100<br>Value<br> tr x td =8/20µs<br>50 Half Value<br>Current<br>0<br>tr td<br>0 t – Time (µs)<br>Note:<br>Its Foldback TM technology provides a clamping voltage lower than the avalanche voltage (but above the<br>rated working voltage).  Also use similar clamping diagram showing the actual voltage waveshape reaction<br>of this foldback technology as shown in attached text at the nd of this document. Please note this is<br>specifically for a 10 kA rated AK, so we need an actual waveshape for this 20 kA rated component..<br>Dimensions<br>PP<br> – Peak Pulse Current – %I<br>IPP<br>**----- End of picture text -----**<br>


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Dimensions Inches Millimeters<br>A 0.950±0.030 24.15±0.8<br>B 0.095±0.024 2.4±0.60<br>C 0.236±0.040 6.00±1.0<br>D 0.630±0.055 16.0±1.4<br>E 0.050±0.002 1.27±0.05<br>F 0.587±0.055  14.9±1.4<br>G - 016C 0.157 max. 4.00 max.<br>G - 058C/063C<br>0.307 max. 7.80 max.<br>     066C/076C<br>L1/L2 L1= L2 tolerance +/- 0.04 inch (1.0 mm)<br>**----- End of picture text -----**<br>


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A<br>F A 0.950±0.030 24.15±0.8<br>B 0.095±0.024 2.4±0.60<br>C 0.236±0.040 6.00±1.0<br>D 0.630±0.055 16.0±1.4<br>D E 0.050±0.002 1.27±0.05<br>F 0.587±0.055  14.9±1.4<br>C G - 016C 0.157 max. 4.00 max.<br>G - 058C/063C<br>B E      066C/076C 0.307 max. 7.80 max.<br>C<br>L1/L2 L1= L2 tolerance +/- 0.04 inch (1.0 mm)<br>Packing Options Part Numbering System<br>Part Number Component   Quantity Packaging AK20 - XXXX -Y<br>Package  Option<br>AK20-XXXX-Y AK Package 56pcs/Box Bulk Series Type Yellow Coating<br>AK20-XXXX-Y-12 AK Package 12pcs/Box Bulk<br>Stand Off Voltage<br>Part Marking System<br>L2 G L1<br>**----- End of picture text -----**<br>


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Part Marking<br>Apply to P/N listed below: Littelfuse Logo<br>AK20-016C-Y<br>AK20-058C-Y Apply to P/N listed below:<br>20-XXXX AK20-063C-Y AK20-076C-Y<br>AK20-066C-Y<br>Littelfuse Logo<br>Trace Code Marking<br> Y:Year Code  WW: Working Week Code Part Marking<br>Trace Code Marking<br> Y:Year Code<br>Type 1 - Side View  WW: Working Week Code<br>Type 2- Top View<br>LF<br>LF<br>20-xxxx<br>YWW<br>YWW<br>**----- End of picture text -----**<br>


**Disclaimer Notice -** Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications.  Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics. 

©2020 Littelfuse, Inc. Specifications are subject to change without notice. Revision: JC.12/28/20 



## Links

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- [Supplier page](https://es.farnell.com/littelfuse/ak20-066c-y/tvs-diode-bidir-66v-axial-leaded/dp/3996850)
---

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