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What is the recommended circuit breaker to protect Surge arresters in a Panel of 70 KA breaking capacity. for ex : A9L40400 and A9L16634

Our SPD devices can be protected by  MCBs. In our Acti 9 catalogue, so regarding :  iPRF12.5r (P/N A9L16634) and iPRD40 (P/NA9L40400). Their recommended protections can be found highlighted in yellow in the attached document. However, we cannot reach a short circuit withstand of 70kA. The maximum that we could reach is just 50kA, as illustrated in the attached catalogue extract.
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