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Thread: Maximum current-carrying capacity for power pads and bonding wires?

7 Discord messages from ℹ️ - Information/⁉️-questions/threads/maximum-current-carrying-capacity-for-power-pads-and-bonding-wires.md.

Category: ℹ️ - Information Parent channel: #⁉️-questions Thread ID: 1512109663838146651

Messages: 7

message-1512109663838146651

2026-06-04T15:03:57.498+00:00 — ANDREUS (@andreus1943)

Content

Hello everyone, apologies if this has been addressed before, but I am currently designing a power converter and have a couple of questions regarding current limits:

1. What is the maximum current-carrying capacity (or electromigration limit) that the power pads can handle?

2. What is the maximum current (fusing current) that the bonding wires can support?

Any documentation or reference values would be greatly appreciated. Thanks in advance!
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message-1512163395393159358

2026-06-04T18:37:28.099+00:00 — tnt (@246tnt)

Content

For (1) there are electromigration limit listed in the PDK doc, you can just apply those to the layout of the pad and estimate it your self.
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message-1512164255103979600

2026-06-04T18:40:53.07+00:00 — tnt (@246tnt)

Content

For (2) the wire used for this run was AlSi1% 1mil
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message-1512711228160737401

2026-06-06T06:54:21.609+00:00 — Tim 'mithro' Ansell (@mithro_)

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Content

I believe it's actually 0.8mil?

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message-1512711819909791775

2026-06-06T06:56:42.693+00:00 — tnt (@246tnt)

Content

@Tim 'mithro' Ansell Ah maybe ... looking back at the pics you took one says 1 mil the other 0.8 😅
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message-1512712835904438292

2026-06-06T07:00:44.925+00:00 — Tim 'mithro' Ansell (@mithro_)

Content

I think they normally use 1mil but needed to use 0.8mil for our parts.
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message-1513180403543052379

2026-06-07T13:58:41.737+00:00 — namibj

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Content

Yeah you said that and that it's like 5x or something the cost (for the Al wire)
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