| PartNumber | MRB12B-BA | MRB12B-BC | MRB12B-BB |
| Description | Rotary Switches MINIATURE ROTARY/LOGIC AND POWER LEVEL | Rotary Switches SPDT,on none on,Strt PC Term, Red Tip Knb | Rotary Switches SPDT On-On Str PC Term w/Brckt |
| Manufacturer | NKK Switches | NKK Switches | NKK Switches |
| Product Category | Rotary Switches | Rotary Switches | Rotary Switches |
| Illuminated | Non-Illuminated | Non-Illuminated | Non-Illuminated |
| Illumination Color | - | - | - |
| Lamp Type | - | - | - |
| Number of Positions | 2 Position | 2 Position | 3 Position |
| Number of Decks | 1 Deck | 1 Deck | 1 Deck |
| Number of Poles per Deck | 1 Pole | 1 Pole | 1 Pole |
| Voltage Rating DC | 28 VDC | 28 VDC | 28 VDC |
| Voltage Rating AC | 28 VAC | 28 VAC | 28 VAC |
| Index Angle | 90 deg | 90 deg | 90 deg |
| Contact Style | Non-Shorting | Non-Shorting | Non-Shorting |
| Termination Style | Pin | Pin | PC Pin |
| Mounting Type | Panel Mount | Panel Mount | Panel Mount |
| Contact Plating | Gold | Gold | Tin |
| Actuator | Knob | Knob | Shaft |
| Contact Form | SPDT | SPDT | SPDT |
| Power Rating | 400 mVA | 400 mVA | 400 mVA |
| Voltage Rating | 28 VAC/DC | 28 VAC/DC | 28 VAC/DC |
| Brand | NKK Switches | NKK Switches | NKK Switches |
| Mounting Style | Panel Mount | Panel Mount | - |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Minimum Operating Temperature | - 10 C | - 10 C | - 10 C |
| Product Type | Rotary Switches | Rotary Switches | Rotary Switches |
| Subcategory | Switches | Switches | Switches |
| RoHS | - | Y | Y |
| Factory Pack Quantity | - | 1 | 1 |