Product Overview
BY459X-1500 Damper Diode for CRT Horizontal Deflection - 1500V SOD113 Isolated Full-Pack
Condition
Unused new old stock (NOS). Markings legible: BY459X 1500. Sold each.
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Product Overview
A glass-passivated, double-diffused damper diode with fast, soft recovery, built for the horizontal deflection stage of HDTV receivers and multi-sync monitors. BY459X-1500 is the 1500 V grade, housed in the two-lead SOD113 full-pack (the TO-220F size class) with an isolated mounting tab.
Key Features
- Repetitive peak reverse voltage (VRRM): 1500 V; non-repetitive peak (VRSM): 1500 V
- Crest working reverse voltage (VRWM): 1300 V
- Peak working forward current: 12 A at 48 kHz
- Repetitive peak forward current (IFRM): 100 A for 100 us
- Surge forward current (IFSM): 100 A for 10 ms, 110 A for 8.3 ms
- Maximum junction temperature: 150 C
- Package: SOD113 two-lead full-pack, isolated mounting tab; pin 1 cathode, pin 2 anode
Applications
- Replacing the damper diode in the horizontal output stage of a CRT multi-sync monitor
- Horizontal deflection service on CRT HDTV receivers
- Stocking spares for a CRT restoration bench that runs high-scan-rate chassis
Frequently Asked Questions
Is the mounting tab isolated?
Yes. The SOD113 full-pack has an isolated mounting tab, so the tab is not connected to either lead.
Is 12 A the average forward current?
No. 12 A is the peak working forward current at 48 kHz. The repetitive peak forward current is 100 A for 100 us.
How is BY459X-1500 different from BY459X-1500S?
They are separate grades of the same diode, and the S grade carries its own forward-voltage and reverse-recovery limits. This is the BY459X-1500, not the -1500S grade.
In a horizontal output stage the damper diode carries the yoke current while the beam crosses the left side of the screen, then hands off to the output transistor near mid-line. Half of every scan line belongs to this part.
