1、AMSC N/A FSC 5930 INCH-POUND MIL-DTL-3786/2G 26 January 2011 SUPERSEDING MIL-DTL-3786/2F 19 November 2004 DETAIL SPECIFICATION SHEET SWITCH, ROTARY, OPEN CONSTRUCTION, AMPERE, STYLE SR02 Inactive for new design after 8 March 1999 This specification is approved for use by all Departments and Agencies
2、 of the Department of Defense. The requirements for acquiring the switch described herein shall consist of this specification sheet and MIL-DTL-3786. FIGURE 1. Style SR02 switch. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 2 NOTES
3、: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Unless otherwise specified, tolerance is .015 (0.38 mm). 4. The number of sections is optional. 5. Nonturn device as shown is not applicable to S construction switches. 6. Shaft-flat angle 90 is the angle
4、 between a line through the center of the shaft and center of the nonturn device and another line through the center of the shaft and perpendicular to the shaft flat. 7. Shaft shown in maximum counterclockwise position for switches with stop and with switch in position number 1 for switches without
5、stop. 8. For allowable variations, see MIL-DTL-3786 ordering data. 9. Front plate design optional provided it falls within the maximum O.D. of the section dimension referenced. FIGURE 1. Style SR02 switch - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
6、se from IHS-,-,-MIL-DTL-3786/2G 3 FIGURE 2. Circuit diagrams viewed from front or knob end with switch in extreme counterclockwise position. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 4 FIGURE 2. Circuit diagrams viewed from fron
7、t or knob end with switch in extreme counterclockwise position - Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 5 FIGURE 2. Circuit diagrams viewed from front or knob end with switch in extreme counterclockwise position -
8、Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 6 FIGURE 2. Circuit diagrams viewed from front or knob end with switch in extreme counterclockwise position - Continued. Provided by IHSNot for ResaleNo reproduction or networ
9、king permitted without license from IHS-,-,-MIL-DTL-3786/2G 7 REQUIREMENTS: Dimensions and configurations: See figures 1 and 2. Angle of throw: 18, 22.5, 30, 36, 25.7, 45, 60, and 90. Terminals: The terminal tabs shall be bent at an angle of 60 15 degrees from the plane of the section. When flat ter
10、minals are required, the dimensions shall be as shown on figure 1. Rotational torque: The minimum and maximum values of torque determined for shaft rotation shall be within the limits specified in table I. TABLE I. Rotational-torque limits. Temperature Torque (pound-inch) Minimum Maximum Room 1.5 6
11、Minimum 1.5 8 Construction type: See table IV. Number of poles per deck: See table VI. Number of positions: See table VI. Life (rotational): The test loads for the applicable circuit conditions shall be as specified in table II. Each of the loads, specified for the applicable environmental condition
12、, shall be switched by at least one rotor contact of the switch. TABLE II. Electrical loads. Environmental condition Inductive load Resistive load Milliamperes Volts, dc Milliamperes Volts At atmospheric pressure 50 28 500 250 50 28 V dc 115 V rms 300 V rms At reduced barometric pressure - - 350 100
13、 28 V dc 115 V rms Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 8 Dielectric withstanding voltage: The applicable test voltage specified in table III shall be applied between the general switch elements. TABLE III. Dielectric-test
14、voltages. Altitude Test voltage Volts, rms At atmospheric pressure 1,000 At reduced barometric pressure 400 Mounting hardware: Each switch shall be supplied with 1 each hexagon nut in accordance with MS25082-20 or equivalent, and one internal-tooth lockwasher in accordance with NASM35333-42 or equiv
15、alent. Contact resistance: For switches of life-temperature characteristics A, C, and E, the contact resistance at room temperature shall not exceed the following values: Initial and after vibration and shock - 20 milliohms. After moisture-resistance and salt spray - 30 milliohms. After initial soak
16、 and completion of life test - 40 milliohms. Vibration grade: Symbol 2 (10 to 500 Hz). Shock type: See table IV. Altitude: Symbol C (70,000 feet). Part number: The military part number shall consist of M3786/2-(four letters selected from tables IV through VII) as shown in the following example: (AKE
17、C identifies a rotary switch of construction type N, temperature-life characteristic B, shock type H and M, ceramic or glass bonded mica insulation material, 36 degree angle of throw, 1 pole per deck, 5 positions, 2 decks, and nonshorting switching characteristics.) M3786/2- A K E C Construction typ
18、e, temperature-life characteristic and shock type (see table IV) Insulation material and angle of throw (see table V) Poles per deck and number of positions (see table VI) Number of decks and switching characteristics (see table VII) NOTE: Part numbers shall be generated only to identify switches sh
19、own on figure 2. Acquisition of switches not identified by military part numbers shall be in accordance with the ordering data of MIL-DTL-3786. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 9 TABLE IV. Code letter for combination of
20、 construction type, temperature-life characteristic, and shock type. Code letter Construction type Temperature-life characteristic Shock type A N B H and M B S B “ C N C “ D S C “ E N D “ F S D “ G N B M H S B “ J N C “ K S C “ L N D “ M S D “ TABLE V. Code letter for combinations of insulation mate
21、rial and angle of throw. Code letter Insulation material Angle of throw Code letter Insulation material Angle of throw A P 18 M P 25.7 B C 18 N C 25.7 C G 18 P G 25.7 D P 22.5 Q P 45 E C 22.5 R C 45 F G 22.5 S G 45 G P 30 T P 60 H C 30 U C 60 I G 30 V G 60 J P 36 W P 90 K C 36 X C 90 L G 36 Y G 90 P
22、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 10 TABLE VI. Code letters for combinations of poles per deck and number of positions. Code letter Poles per deck Number of positions Code letter Poles per deck Number of positions A 1 C 1
23、/ W 2 2 B 1 2 X 2 3 C 1 3 Y 2 4 D 1 4 Z 2 5 E 1 5 1 2 6 F 1 6 2 2 7 G 1 7 3 2 8 H 1 8 4 2 9 J 1 9 5 2 10 K 1 10 6 3 2 L 1 11 7 3 3 M 1 12 8 3 4 N 1 13 9 4 2 P 1 14 10 4 3 Q 1 15 11 4 4 R 1 16 12 4 5 S 1 17 13 5 2 T 1 18 14 5 3 U 1 19 15 6 2 V 1 20 1/ Switch is continuous rotation type (no stops), an
24、d number of positions is dependent on angle of throw as follows: Angle of throw Positions 18 20 22.5 16 30 12 36 10 25.7 14 45 8 60 6 90 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 11 TABLE VIII. Code letter for combinations of
25、number of decks and switching characteristics. Code Number Switching characteristics letter of decks First deck Second deck Third deck Fourth deck Fifth deck Sixth deck A 1 NS B 1 S C 2 NS NS D 2 S S E 2 NS S F 3 NS NS NS G 3 S S S H 3 NS NS S J 3 NS S S K 4 NS NS NS NS L 4 S S S S M 4 NS NS NS S N
26、4 NS S S S P 5 NS NS NS NS NS Q 5 S S S S S R 5 NS NS NS NS S S 5 NS S S S S T 4 NS NS S S U 5 NS NS NS S S V 5 NS NS S S S W 6 NS NS NS NS NS NS X 6 S S S S S S Y 6 NS NS NS NS NS S Z 6 NS NS NS NS S S 1 6 NS NS NS S S S 2 6 NS NS S S S S 3 6 NS S S S S S Provided by IHSNot for ResaleNo reproductio
27、n or networking permitted without license from IHS-,-,-MIL-DTL-3786/2G 12 The margins of this specification are marked with vertical lines to indicate where modifications from this revision were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inac
28、curacies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations. Referenced Documents: MIL-DTL-3786 Custodians: Preparing activity: Army - CR DLA - CC Navy - EC Air Force - 85 (Project
29、 5930-2011-007) DLA CC Review activities: Air Force - 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil/ . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
