What are the differences between the A and non A versions of the TCP0030, TCP312, TCP305 and P6021 current probes?

What are the differences between the A and non A versions of the TCP0030, TCP312, TCP305 and P6021 current probes?

The TCP0030A, TCP312A, TCP305A, and P6021A probes are updates to their existing models.  Updates include:

• Larger jaw diameter (5 mm vs. 3.8 mm) to accommodate larger wire sizes
•  3^rd Party Certification for bare wire voltages up to 150 V CAT II - (Non-A models did not list a "bare wire" specification.)
• Increased reliability