Replacement GI triacs

The GI triac spec is loose; BT138-600E, BTA12-600, NTE5671 (800 V 16 A), NTE56010 (800 V 15 A) and NTE56008 (600 V 15 A) all work. Triacs rarely need replacing.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Checking GI triacs with the game on
• Triacs switch AC lamps
• Bench testing a GI triac with a 9 V battery
• LED replacement lamps

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)