Fairchild RURD660, RURD660S 6A, 600V Ultrafast Diodes Data Sheet

Summary

These datasheets provide comprehensive technical specifications for RURD660 and RURD660S ultrafast diodes. Engineered with soft recovery characteristics, these components are ideal for high-speed power switching applications such as freewheeling circuits, clamping diodes, and rectifiers in switching power supplies. The manual details electrical performance (Vf, Rv), thermal limits, surge current ratings, and application guidelines. This documentation is essential for electronics engineers designing robust and efficient DC/DC and AC power conversion systems requiring high-reliability components with minimal ringing and low power loss.

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RURD660, RURD660S

Data Sheet January 2002

6A, 600V Ultrafast Diodes Features The RURD660 and RURD660S are ultrafast diodes with soft Ultrafast with Soft Recovery. . . . . . . . . . . . . . . . . . . <55ns recovery characteristics (t < 55ns). They have low forward

Operating Temperature . . . . . . . . . . . . . . . . . . . . . .

voltage drop and are silicon nitride passivated ion-implanted

epitaxial planar construction. Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600V These devices are intended for use as freewheeling/ Avalanche Energy Rated

clamping diodes and rectifiers in a variety of switching power

Planar Construction

supplies and other power switching applications. Their low stored charge and ultrafast soft recovery minimize ringing

Applications

and electrical noise in many power switching circuits

reducing power loss in the switching transistors. Switching Power Supplies Power Switching Circuits

Formerly developmental type TA49038.

General Purpose

Ordering Information

Packaging

PART NUMBER PACKAGE BRAND

JEDEC STYLE TO-251

RURD660 TO-251 RUR660

RURD660S TO-252 RUR660 ANODE

CATHODECATHODE

NOTE: When ordering, use the entire part number. Add the suffix 9A

(FLANGE)

to obtain the TO-252 variant in the tape and reel, i.e., RURD660S9A.

Symbol

JEDEC STYLE TO-252

CATHODE (FLANGE)

CATHODE ANODE

Absolute Maximum Ratings = 25 C, Unless Otherwise Specified

RURD660 RURD660S UNITS

Peak Repetitive Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V

Working Peak Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DC Blocking Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V Average Rectified Forward Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I

F(AV)

(T = 155 C) Repetitive Peak Surge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I

(Square Wave, 20k Hz) Nonrepetitive Peak Surge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I

(Halfwave, 1 Phase, 60Hz) Maximum Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P Avalanche Energy (See Figures 10 and 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m J

Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , T -65 to 175

Maximum Lead Temperature for Soldering Leads at 0.063 in. (1.6mm) from case for 10s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T Package Body for 10s, see Tech Brief 334. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T

Page Summary Contents For Fairchild RURD660, RURD660S 6A, 600V Ultrafast Diodes Data Sheet

Page 1 RURD660, RURD660S Data Sheet January 2002 6A, 600V Ultrafast Diodes Features The RURD660 and RURD660S are ultrafast diodes with soft Ultrafast with Soft Recovery. . . . . . . . . . . . . . . . . . . &...

Page 2 RURD660, RURD660S , F Electrical Specifications = 25 C, Unless Otherwise Specified SYMBOL TEST CONDITION MIN TYP MAX UNITS = 1A, d I /dt = 200A/ ns = 6A, d I /dt = 200A/ ns = 6A, d I /dt = 200A/ ns = ...

Page 3 RURD660, RURD660S t, IM s) t, IM s) Typical Performance Curves (Continued) TC = 100o C, d IF/dt = 200A/µs TC = 25o C, d IF/dt = 200A/µs , J IO PA IT IF, FORWARD CURRENT (A) IF, FORWARD CURRENT (A) FIG...

Page 4 RURD660, RURD660S Test Circuits and Waveforms VGE AMPLITUDE AND RG CONTROL d IF/dt t1 AND t2 CONTROL IF DUT CURRENT d IF RG SENSE IF ta tb VGE VDD t1 IGBT 0.25 IRM FIGURE 8. TEST CIRCUIT FIGURE 9. WAV...

Page 5 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ FAST...

Manual Details

Brand	Fairchild
Pages	5
File Size	392.14 KB
Published	June 03, 2026

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Frequently Asked Questions

What is the unit's recovery time for ultrafast operation?

The diodes feature an ultrafast soft recovery characteristic with a time less than 55ns (t < 55ns).

Are these diodes suitable for use as rectifiers or clippers?

Yes, they are intended for use as freewheeling/clamping diodes and rectifiers in various switching power applications.

If I need the TO-252 package variant in tape and reel form, what must I do when ordering?

You must add the suffix 9A to the existing part number (e.g., RURD660S9A).

Can these components be used as critical parts in life support devices or systems?

No, they are not authorized for use in life support devices without the express written approval of Fairchild Semiconductor Corporation.