31DF6

## **Diode Ultra Fast** 

- **Features:** • High efficiency, low VF • High current capability • High reliability Compliant 

- High surge current capability 

- Low power loss 

## **Specifications:** 

## **Mechanical Data:** 

Cases : Moulded plastic Lead : Pure tin plated, lead free, solderable per MIL-STD-202, Method 208 guaranteed Polarity : Colour band denotes cathode end High temperature soldering guaranteed : 260°C/10 seconds/0.375ʺ, (9.5mm) lead lengths at 5lbs., (2.3kg) tension Weight : 1.2g 

## **Maximum Ratings and Electrical Characteristics** 

Rating at 25°C ambient temperature unless otherwise specified. Single phase, half wave, 60Hz, resistive or inductive load. For capacitive load, derate current by 20%. 

|For capacitive load, derate current by 20%.|||||
|---|---|---|---|---|
|**Type Number**|**Symbol**|**31DF4**|**31DF6**|**Units**|
|Maximum Recurrent Peak Reverse Voltage|Vrrm|400|600|V|
|Maximum RMS Voltage|Vrms|280|420||
|Maximum DC Blocking Voltage|Vdc|400|600||
|Maximum Average Forward Rectified Current<br>0.375 (9.5mm) Lead Length at Ta= 29°C<br>(Note 1)<br>Tl= 109°C|I(av)|1.2<br>3||A|
|Peak Forward Surge Current, 8.3ms Single<br>Half Sine-wave Superimposed on Rated<br>Load (JEDEC method)|Ifsm|45|||
|Maximum Instantaneous Forward Voltage<br>at 3A|Vf|1.7||V|
|Maximum DC Reverse Current at Ta= 25°C<br>at Rated DC Blocking Voltage at Ta= 125°C|Ir|20<br>100||μA|



**Note 1** . Without Fin or PC Board. 

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## **Diode Ultra Fast** 

|**Type Number**|**Symbol**|**31DF4**|**31DF6**|**Units**|
|---|---|---|---|---|
|Maximum Reverse Recovery Time (Note 3)|Trr|35||nS|
|Typical Thermal Resistance ( Note 2 )|RθJA|80||°C/W|
|Operating Temperature Range|Tj|-40 to +150||°C|
|Storage Temperature Range|Tstg||||



**Note 2** . Thermal Resistance from Junction to Ambient 0.375ʺ (9.5mm) Lead Length. **Note 3** . Reverse recovery Test Condition: Ta = 25°C, IFM = 3A, di/dt = 50A/Us. 

## **Ratings and Characteristic Curves (31DF4, 31DF6)** 

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## **Diode Ultra Fast** 

Note: 1. Rise Time = 7ns Maximum. Input Impedance = 1MΩ 22pf Note: 2. Rise Time = 10ns Maximum Source Impedance = 50Ω 

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## **Diode Ultra Fast** 

## **DO-201AD** 

Dimensions : Inches (Millimetres) 

## **Part Number Table** 

|**Part Number Table**||
|---|---|
|**Description**|**Part Number**|
|Diode, Ultra-Fast, 3A, 400V|31DF4|
|Diode, Ultra-Fast, 3A, 600V|31DF6|



**Important Notice :** This data sheet and its contents (the “Information”) belong to the members of the Premier Farnell group of companies (the “Group”) or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence. Multicomp is the registered trademark of the Group. © Premier Farnell plc 2012. 

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