Design scheme of access control power supply:

TVS transient suppression diode:
Product | Power(W) | VRMN(V) | VBR min(V) | VBR max(V) | IT(MA) | Vc(V) | IPP(A) | IR(Ua) | Package |
| SMAJ15CA | 400 | 15 | 16.7 | 19.2 | 1 | 24.4 | 24.6 | 5 | DO-214AC(SMA) |
| SMBJ15CA | 600 | 15 | 16.7 | 19.2 | 1 | 24.4 | 24.6 | 5 | DO-214AA(SMB) |
| SMCJ15CA | 1500 | 15 | 16.7 | 19.2 | 1 | 24.4 | 61.5 | 5 | DO-214AB(SMC) |
| SMDJ15CA | 3000 | 15 | 16.7 | 18.5 | 1 | 24.4 | 122.95 | 5 | DO-214AB(SMC) |