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<tbody>
<tr class="odd">
<td colspan="26">REVISIONS</td>
</tr>
<tr class="even">
<td colspan="3"><strong>SYMBOL</strong></td>
<td colspan="14"><strong>DESCRIPTION</strong></td>
<td colspan="5"><strong>DATE</strong></td>
<td colspan="4"><strong>APPROVAL</strong></td>
</tr>
<tr class="odd">
<td colspan="3"><h1 id="section"></h1></td>
<td colspan="14"></td>
<td colspan="5"></td>
<td colspan="4"></td>
</tr>
<tr class="even">
<td colspan="26"><strong>SHEET REVISION STATUS</strong></td>
</tr>
<tr class="odd">
<td>SH</td>
<td>1</td>
<td colspan="2">2</td>
<td>3</td>
<td>4</td>
<td>5</td>
<td>6</td>
<td>7</td>
<td>8</td>
<td>9</td>
<td>10</td>
<td>11</td>
<td colspan="2">12</td>
<td>13</td>
<td colspan="2">14</td>
<td colspan="2">15</td>
<td>16</td>
<td colspan="2">17</td>
<td>18</td>
<td>19</td>
<td>20</td>
</tr>
<tr class="even">
<td>REV</td>
<td>-</td>
<td colspan="2">-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
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<td>SH</td>
<td>21</td>
<td colspan="2">22</td>
<td>23</td>
<td>24</td>
<td>25</td>
<td>26</td>
<td>27</td>
<td>28</td>
<td>29</td>
<td>30</td>
<td>31</td>
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<td>33</td>
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<td>36</td>
<td colspan="2">37</td>
<td>38</td>
<td>39</td>
<td>40</td>
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<td>REV</td>
<td></td>
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<td></td>
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<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="14"><strong>ORIGINATOR:<br />
T. J. Perry/QSS Group Inc.</strong></td>
<td colspan="5"><strong>DATE<br />
</strong></td>
<td colspan="7"><strong>FSC: 5930</strong></td>
</tr>
<tr class="even">
<td colspan="14">APPROVED:</td>
<td colspan="5"></td>
<td colspan="7">Switch, Thermostatic,<br />
Bimetallic, SPST,</td>
</tr>
<tr class="odd">
<td colspan="14"><strong>CODE 562 APPROVAL:<br />
M.A. Proctor/Code 562/GSFC</strong></td>
<td colspan="5"></td>
<td colspan="7">Corrosion Resistant Steel, Hermetic, Detail
Specification for</td>
</tr>
<tr class="even">
<td colspan="14"><strong>CODE 562 SUPERVISORY APPROVAL:<br />
D.D. Lakins/Code 562/GSFC</strong></td>
<td colspan="5"><strong><br />
</strong></td>
<td colspan="7"></td>
</tr>
<tr class="odd">
<td colspan="14"><strong>ADDITIONAL APPROVAL:<br />
</strong></td>
<td colspan="5"></td>
<td colspan="7"><strong>S-311-641/03<br />
</strong></td>
</tr>
<tr class="even">
<td colspan="26"><p><strong>NATIONAL AERONAUTICS AND SPACE
ADMINISTRATION</strong></p>
<p><strong>GODDARD SPACE FLIGHT CENTER</strong></p>
<p><strong>GREENBELT, MARYLAND 20771</strong></p>
<p><strong>CAGE CODE: 25306 Page 1 of 8</strong></p></td>
</tr>
</tbody>
</table>

**GSFC DETAIL SPECIFICATION**

**SWITCH, THERMOSTATIC, BIMETALLIC, SINGLE POLE, SINGLE THROW (SPST),
CORROSION RESISTANT STEEL, HERMETICALLY SEALED**

**The requirements for procuring the thermostatic switches described
herein shall consist of this specification and the current revision of
GSFC S‑311‑641.**

**PART NUMBER EXAMPLE:**

**[G311P641/03]{.underline} [702]{.underline} [S]{.underline}
[040]{.underline} [\_A]{.underline} [065]{.underline} [A]{.underline} /
[C\_]{.underline}**

**(A) (B) (C) (D) (E) (F) (G) (H)**

**(A) GSFC PREFIX**

**(B) MOUNTING CONFIGURATION**

**701 = Bare Module (See Figure 1)**

**702 = .164-32 Stud Mount (See Figure 2)**

**703 = .190-32 Stud Mount (See Figure 3)**

**704 = .138-32 Stud Mount (See Figure 4)**

**705 = Narrow Slot-Slot Flange (See Figure 5)**

**706 = Hole-Slot Flange (See Figure 6)**

**707 = Tube Mount Adapter (See Figure 7)**

**708 = Bare Module with Strain Relief (See Figure 8)**

**709 = Bare Module with Lead Wires (See Figure 9)**

**710 = .250 Dia. Tube Mount Adapter and Lead Wires (See Figure 10)**

**711 = .164-32 Stud Mount with Leas Wires (See Figure 11)**

**712 = Hole-Slot Flange with Lead Wires (See Figure 12)**

**713 = .375 Dia. Tube Mount Adapter and Lead Wires (See Figure 13)**

**714 = Tube Mount Adapter and Lead Wires (See Figure 14)**

**715 = Hole-Slot Flange, wide (See Figure 15)**

**(C) S = Space Rated Thermal Switch**

**(D) Lower Operating Setpoint in °F**

**(E) A = Open on Rising Temperature**

**B = Close on Rising Temperature**

**(F) Upper Operating Setpoint in °F**

**(G) Special Temperature Feature Code \***

**(H) Special Physical Feature Code (See Figure section as applicable,
Unit 7 code). Consult factory for special configurations not shown.**

**\* See Table 1 for non-standard operating temperatures, differential
and tolerances. The setpoint tolerances may also be specified by adding
a suffix to the ordering code:**

> **/X/Y/Z where X = Closing setpoint tolerance**
>
> **Y = Opening setpoint tolerance**
>
> **Z = Minimum differential between opening and closing setpoints**

**Example: /3/2/6 represents:**

> **±3°F on closing, ±2°F on opening and 6°F minimum differential.**
>
> **REQUIREMENTS**

**Dimensions, configuration and weight: see Figures 1 and on.**

**Switching action: Single Pole, Single Throw (SPST)**

**Storage temperature range: -184ºF to +350ºF (-120ºC to +177ºC)**

**Operating temperature range: -120ºF to +300ºF (-84.4ºC to +148.9ºC)**

**Contact rating: resistive load, 5.0 amperes at 28 VDC, 100,000
cycles**

> **3.5 amperes at 42 VDC, 10,000 cycles**
>
> **1.0 ampere at 120 VDC, 100,000 cycles**
>
> **1.0 ampere at 30 VDC, 1,000,000 cycles**
>
> **1.0 milliampere at 1 mV, 100,000 cycles**

**Contact resistance: 0.025 ohms maximum, per MIL-STD-202, Method 307**

**DWV: 1250 VAC, rms, 60 Hz for 1 minute, terminals to case, per
MIL-STD-202, Method 301**

**Vibration (Random): 20-2000 Hz, 23.5 grms, 24 minutes in most critical
axis (unmonitored)**

**Shock: Tested to 4000g's, ½ sine, ½ millisecond.**

**Hermeticity: 1 X 10^-8^ atm cc/sec. maximum, per MIL-STD-202, Method
112,**

**Condition C**

**CRBI (Contact Resistance Burn-In): 1000 cycles, 50 milliohms maximum
each closure with missed cycle detection**

**Cleaning: 100% tested for cleanliness using micro-particle analysis
(\<1 mil particle limit)**

**DPA (Destructive Physical Analysis): Customer option. Performed per\
MIL-STD-1580, Rev. B**

**Acceptance Testing (100% of parts): Per Table I of GSFC S-311-641**

**Lot Acceptance testing: RGA (1000 ppm moisture maximum) and Group B**

**[Standard Tolerance Limits]{.underline}**

+------------------------------------+---------------------------------+
| **Specified Temperature Setpoint   | **Opening Temperature           |
| Range**                            | Differential**                  |
+------------------------------------+---------------------------------+
| **-120 to 0ºF\                     | **±6**                          |
| (-84.4 to -17.8ºC)**               |                                 |
|                                    | **±3.3**                        |
+------------------------------------+---------------------------------+
| **+1 to +250ºF\                    | **±5**                          |
| (-17.2 to +121.1ºC)**              |                                 |
|                                    | **±2.8**                        |
+------------------------------------+---------------------------------+
| **+251 to +300ºF\                  | **±7**                          |
| (121.7to +148.9ºC)**               |                                 |
|                                    | **±3.9**                        |
+------------------------------------+---------------------------------+

**Approved source(s):**

  ----------------------- ----------------------- -----------------------
  **Manufacturer**        **Cage Code**           **Vendor Similar Part
                                                  Number**

  **Honeywell DSES,       **0FYP0**               **700 Series**
  Redmond, WA.**                                  
  ----------------------- ----------------------- -----------------------

**Table 1 [Special Temperature Feature Code]{.underline}**

**A Setpoint tolerances are min-max.**

**Differential shall be 5°F minimum.**

**B Opening setpoint is min or max.**

**C Closing setpoint is min or max.**

**D Opening setpoint is ±5 with 7 to 18 differential.**

**Closing setpoint given is min or max. possible.**

**E Closing setpoint is ±5 with 7 to 18 differential.**

**Opening setpoint given is min or max. possible.**

**F Closing setpoint is ±4F with 11 to 19F differential.**

**Opening setpoint is min or max. possible.**

**G Opening and closing setpoints are ±3°F**

**H Opening and closing setpoints are ±4°F**

**J Opening and closing setpoints are ±5°F**

**K Closing setpoint is ±2°F. Opening setpoint is min or max.**

**M Differential shall be 5°F min.**

**N Closing setpoint is ±3°F. Opening setpoint given is min or max
possible.**

**P Closing setpoint is ±4°F. Opening setpoint given is min or max
possible.**

**R Setpoint tolerances are Min-Max. Differential shall be 10°F Min.**

**S Opening and closing setpoints are ±6°F. Differential shall be 10°F
Min.**

**T Closing setpoint is ±5° with 7° to 13° differential. Opening
setpoint given is min or max possible.**

**U Setpoint tolerances are min-max. Specify minimum differential
(example: U/7).**

**V Opening setpoint is min or max. Specify closing tolerance and
minimum differential (example: V/5/7).**

W Closing setpoint is min or max. Specify opening tolerance and minimum
differential (example: W/5/7).

+----------------------------+-----------------------------------------+
| **Figure 1:**              | > ![](media/image1.wmf)                 |
|                            |                                         |
| **701 = Bare Module**      |                                         |
+----------------------------+-----------------------------------------+
| > **Figure 2:\             | > ![](media/image2.wmf)                 |
| > 702 = .164-32 Stud       |                                         |
| > Mount**                  |                                         |
+----------------------------+-----------------------------------------+
| > **Figure 3:**            | > ![](media/image3.wmf)                 |
| >                          |                                         |
| > **703 = .190-32 Stud     |                                         |
| > Mount**                  |                                         |
+----------------------------+-----------------------------------------+
| **Figure 4:**              | > ![](media/image4.wmf)                 |
|                            |                                         |
| **704 = .138-32 Stud       |                                         |
| Mount**                    |                                         |
+----------------------------+-----------------------------------------+
| **Figure 5:**              | > ![](media/image5.wmf)                 |
|                            |                                         |
| **705 = Narrow Slot-Slot   |                                         |
| Flange**                   |                                         |
+----------------------------+-----------------------------------------+
| **Figure 6:**              | > ![](media/image6.wmf)                 |
|                            |                                         |
| **706 = Hole-Slot Flange** |                                         |
+----------------------------+-----------------------------------------+
| **Figure 7:**              | > ![](media/image7.wmf)                 |
|                            |                                         |
| **707 = Tube Mount         |                                         |
| Adapter**                  |                                         |
+----------------------------+-----------------------------------------+
| **Figure 8:**              | > ![](media/image8.wmf)                 |
|                            |                                         |
| **708 = Bare Module with   |                                         |
| Strain Relief**            |                                         |
+----------------------------+-----------------------------------------+
| **Figure 9:**              | > ![](media/image9.wmf)                 |
|                            |                                         |
| **709 = Bare Module with   |                                         |
| Lead Wires**               |                                         |
+----------------------------+-----------------------------------------+
| **Figure 10:**             | > ![](media/image10.wmf)                |
|                            |                                         |
| **710 = .250 Dia. Tube     |                                         |
| Mount Adapter and Lead     |                                         |
| Wires**                    |                                         |
+----------------------------+-----------------------------------------+
| **Figure 11:**             | > ![](media/image11.wmf)                |
|                            |                                         |
| **711 = .164-32 Stud Mount |                                         |
| with Leas Wires**          |                                         |
+----------------------------+-----------------------------------------+
| **Figure 12:**             | > ![](media/image12.wmf)                |
|                            |                                         |
| **712 = Hole-Slot Flange   |                                         |
| with Lead Wires**          |                                         |
+----------------------------+-----------------------------------------+
| > **Figure 13:**           | > ![](media/image13.wmf)                |
| >                          |                                         |
| > **713 = .375 Dia. Tube   |                                         |
| > Mount Adapter and Lead   |                                         |
| > Wires**                  |                                         |
+----------------------------+-----------------------------------------+
| > **Figure 14:**           | > ![](media/im                          |
| >                          | age14.wmf){width="3.0006944444444446in" |
| > **714 = Tube Mount       | > height="2.920138888888889in"}**\      |
| > Adapter and Lead Wires** | > **Weight will vary by configuration   |
+----------------------------+-----------------------------------------+
| > **Figure 15:**           | > !                                     |
| >                          | [](media/image15.wmf){width="3.31875in" |
| > **715 = Hole-Slot        | > height="3.4131944444444446in"}\       |
| > Flange, wide**           | > Weight will vary by configuration     |
+----------------------------+-----------------------------------------+

![](media/image16.png){width="3.3645833333333335in"
height="0.6666666666666666in"}