I am looking at an Osram OSLON® Black, SFH 4715A Infared LED.

Is this LED rated for continuous operation?

The spec sheet lists:

Total radiant flux (IF = 1 A, tp = 10 ms) (typ) Φe 770 mW

Does the 10ms mean that this is the maximum on time? Any way to figure out what the maximum continuous current is?


  • 1
    \$\begingroup\$ Have you looked at the graph for "Permissible Pulse Handling Capability?" \$\endgroup\$ – jonk Mar 8 '19 at 6:41

The answer is in this chart on page 5 of the datasheet:

enter image description here

For pulse widths above 1 s, (which we can extrapolate out to DC operation), so long as you heat sink adequately to maintain a die temperature of 85 C (possibly slightly higher, but you definitely want to avoid run-away die temperature) the maximum current is 2 A.


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