| Part Number: | KSD301 | A | 110 | B | C | F | 2 | C |
|---|---|---|---|---|---|---|---|---|
| Explanation: |
Model Series KSD301 - Snap-action bimetal thermostat
|
Contact Type A - Normally closed; opens when temperature rises to the set point
B - Normally open; closes when temperature rises to the set point M - Manual reset |
Operating Temperature 50-175 - Operating temperature in °C; UL/CUL versions up to 205°C
|
Temperature Tolerance A - Action ±3°C; reset ±4°C; for operating temperatures below 105°C
B - Action ±5°C; reset ±8°C; for operating temperatures above 106°C |
Bracket Type C, B, E, H, R, X, D, DL, V, P - Fixed bracket types
O, U, M, S, G - Loose bracket types |
Terminal Orientation F - 0°
R - 90° T - 45° L - Opposite 90° |
Terminal Size 1 - AMP #187 tab, 4.75x0.8mm
2 - AMP #250 tab, 6.35x0.8mm 3 - Solder tab, 4.75x0.5mm 4 - DIP tab, 2.54mm pitch 6 - Weld tab 7 - AMP #187 tab |
Base Material Blank - Bakelite
C - Ceramic |
The KSD301 snap action thermostat is a compact bimetal mechanical thermostat for temperature control and thermal protection. It uses a snap disc mechanism to open or close the contact quickly when the set temperature is reached, helping reduce arcing, improve reliability and extend service life.
| Resistive load | 16A 125V AC, 10A 250V AC, 16A 250V AC |
| Contact action | Contact opens or closes when temperature rises to the set point, depending on selected contact type. |
| Reset type | Automatic reset or manual reset options. |
The order-code diagram explains how to specify contact type, temperature tolerance, bracket style, terminal orientation and terminal size.

| A | Contact opens when temperature rises to the set point, normally closed. |
| B | Contact closes when temperature rises to the set point, normally open. |
| M | Manual reset. |


Bracket styles support different mounting requirements. Stainless steel cap versions are available for D, DL, V and U types.
| C Type | ![]() |
| B Type | ![]() |
| E Type | ![]() |
| H Type | ![]() |
| R Type | ![]() |
| X Type | ![]() |
| D Type | ![]() |
| DL Type | ![]() |
| V Type | ![]() |
| P Type | ![]() |
| O Type | ![]() |
| U Type | ![]() |
| M Type | ![]() |
| S Type | ![]() |
| G Type | ![]() |
Choose the terminal orientation that fits the wiring space and mounting direction.
| F / 0 degree | ![]() |
| R / 90 degree | ![]() |
| T / 45 degree | ![]() |
| L / 90 degree opposite | ![]() |
Terminal options allow the thermostat to match common quick-connect wiring requirements.
| Type 1 | ![]() |
| Type 2 | ![]() |
| Type 3 | ![]() |
| Type 4 | ![]() |
| Type 6 | ![]() |
| Type 7 | ![]() |