I bought a damaged Lavazza coffee machine. After quick analysis I've found something in TO-92 case, which apparently exploded for unknown reason. It's literally in pieces, but I was able to find that the last letters describing the model were "8D" at the top and "30" at the bottom (see attachment). Fortunately, another part in the same case is mounted right next to the exploded one and is still intact. The full model of this part is "131-8D", last characters in footnote match as well. The closest element I was able to find is BT131-8D.
The problem is, I am unable to find this exact triac to buy anywhere. I have no experience with triacs, so I'm not sure which parameters should be considered during search for an equivalent and which can have some deviations from the original value.
As an example, Z0103NA looks widely available and basic parameters ("repetitive peak offstate voltage" and "RMS on-state current") are matching, but it has smaller "non-repetitive peak on" (16A vs 8A).
Unfortunately, I wasn't able to find the schematic for this board in case we need it to decide, which equivalent would work. It has some identifiers on it, but none of them gives any results in Google:
Considering all this, I have two questions:
1. Are there any general guidelines about triac parameters while looking for the equivalent? I was looking for the answer myself and that's how I got to this forum in the first place. The problem is that answers seem to consider cases from questions specifically.
2. What might've caused the triac to explode in the first place, besides a possible manufacturing defect? Do you think it would be reasonable to just replace the triac and see if it works, with taking some safety precautions in case of another explosion?
The problem is, I am unable to find this exact triac to buy anywhere. I have no experience with triacs, so I'm not sure which parameters should be considered during search for an equivalent and which can have some deviations from the original value.
As an example, Z0103NA looks widely available and basic parameters ("repetitive peak offstate voltage" and "RMS on-state current") are matching, but it has smaller "non-repetitive peak on" (16A vs 8A).
Unfortunately, I wasn't able to find the schematic for this board in case we need it to decide, which equivalent would work. It has some identifiers on it, but none of them gives any results in Google:
Considering all this, I have two questions:
1. Are there any general guidelines about triac parameters while looking for the equivalent? I was looking for the answer myself and that's how I got to this forum in the first place. The problem is that answers seem to consider cases from questions specifically.
2. What might've caused the triac to explode in the first place, besides a possible manufacturing defect? Do you think it would be reasonable to just replace the triac and see if it works, with taking some safety precautions in case of another explosion?