| PartNumber | MB2521S4W01-CA | MB2521S4W01-CB | MB2521S4W01 |
| Description | Pushbutton Switches MINI PUSHBUTTON MULTI-FUNCTION | Pushbutton Switches MINI PUSHBUTTON MULTI-FUNCTION | Pushbutton Switches DPDT ON(ON) 3A QUICK CONNECT SLDR |
| Manufacturer | NKK Switches | NKK Switches | NKK Switches |
| Product Category | Pushbutton Switches | Pushbutton Switches | Pushbutton Switches |
| RoHS | Y | Y | Y |
| Illuminated | Non-Illuminated | Non-Illuminated | Non-Illuminated |
| Lamp Type | - | - | - |
| Contact Form | DPDT | DPDT | DPDT |
| Switch Function | ON - (ON) | ON - (OFF) | ON - (OFF) |
| Current Rating | 3 A | 3 A | 3 A |
| Voltage Rating AC | 125 VAC | 125 VAC | 125 VAC |
| Mounting Style | Panel | Panel Mount | Panel Mount |
| Mounting Type | Bushing | Bushing | Bushing |
| Termination Style | Solder Lug | Solder Lug | Solder Lug |
| Contact Plating | Silver | Silver | Silver |
| Actuator | Square | Round | Plunger |
| Cap Color | Black | White | - |
| Series | MB2500 PUSHBUTTON | MB2500 | MB2500 |
| Housing Material | Brass | Brass | - |
| Brand | NKK Switches | NKK Switches | NKK Switches |
| Flammability Rating | UL 94 V-0 | UL 94 V-0 | - |
| Life | 200000 Cycles | 200000 Cycles | - |
| Product Type | Pushbutton Switches | Pushbutton Switches | Pushbutton Switches |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Switches | Switches | Switches |
| Illumination | - | Non-Illuminated | Non-Illuminated |
| Features | - | - | Button/cap ordered separately |
| Actuator Style | - | - | Without Cap |
| Part # Aliases | - | - | MB-2521 |