| Model | Case | OVP Module Required |
| Single Output | B,C,D, N | IOVP-12 |
| Single Output | E, F | IOVP-24 |
| Dual Output | AA, B, BB | IOVP-12 (protects both outputs) |
| Dual Output | CC | OVP (built-in on 5V outputs) |
| Dual Output | E, DD | IOVP-24 (protects both outputs) |
| Triple & Quad Output | AA, BAA, D | IOVP-12 (protects both outputs) |
| Triple & Quad Output | CBB, 131 | |
| Triple & Quad Output | DBB | OVP (built-in on Main 5V outputs) |
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| IAR5-0.6/OVP -5V Sub-Regulator Module. This module will provide a -5VDC regulated output @ 0.6 amps when connected to any filtered -7 to -30 DC source | ||
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| Note: IOVP12 & IOVP24: Adjustable Range 6.5V to 35V | ||