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QO or QOB breaker with ring tongue terminals

What does suffix 5237, 5238, and 5273 indicate on QO and QOB breakers?

Product Line:
QO and QOB Breaker, QO Load Center, NQ Panelboard

QO Load Center, NQ Panelboard, OEM Applications

Ring terminals are available as a factory installed option. There is a +20% price adder.
Poles Amp Suffix
1, 2, 3 10A- 30A 5237
1, 2 35A- 60A 5238
3 35A- 50A 5238
2 70A- 110A 5273
3 60A- 100A 5273

CTA-ID : 5903
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