REVISIONS
SYMBOL
--`,,```,,,,``,``,``,,,,``,,,`,-`-`,,`,,`,`,,`---
DESCRIPTION
Original Release
Complete Rewrite per RN A-108
Incorporated Changes per RN A-122
DATE
01/07/91
07/02/96
07/05/01
APPROVAL
---
A
B
SHEET REVISION STATUS
SH
REV
SH
REV
ORIGINATOR:
T. J. Perry/Unisys
APPROVED:
M. A. Garrison/Unisys
CODE 311 APPROVAL:
P. J. Jones/GSFC
CODE 311 SUPERVISORY APPROVAL:
D. G. Cleveland/GSFC
ADDITIONAL APPROVAL:
S-311-P-683
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
GODDARD SPACE FLIGHT CENTER
GREENBELT, MARYLAND 20771
CAGE CODE: 25306
Page 1 of 13
DATE
11/16/90
11/16/90
Resistor, Fixed, Precision
High Voltage (Caddock
Type MG and HG)
FSC:
5905
1
B
21
2
A
22
3
B
23
4
A
24
5
A
25
6
B
26
7
A
27
8
B
28
9
B
29
10
A
30
11
A
31
12
A
32
13
B
33
34
35
36
37
38
39
40
14
15
16
17
18
19
20
1/3/91
1/7/91
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Questions or comments about this message: please call the Document Policy Group
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1.
1.1
SCOPE
Scope. This specification covers the procurement requirements for fixed, metal oxide, precision
high voltage resistors. These resistors are intended for use in GSFC space system electronic
circuits requiring high voltages and high resistance values with good stability.
Goddard part number. Parts procured in complete compliance with the requirements of this
specification shall be identified by a Goddard part number of the following form.
G311P683
-750
1006
D
1.2
Goddard
Designator
Style
(See 1.3)
Resistance
Value
(See 1.4)
Tolerance
(See 1.5)
1.3
1.4
Style. The style shall be identified by the first three digits of the dash number and specifies
resistors of a type and size listed in Figure 1 and Table I.
Resistance value. The nominal resistance value is specified by the four digits in the fourth, fifth,
sixth, and seventh positions of the dash number. The first three digits (fourth, fifth, and sixth)
represent significant figures, the last digit (seventh) specifies the number of zeroes to follow.
example: 1006 = 100 megohm
The resistance value selected may be any value within the standard resistance range listed in Table
I.
--`,,```,,,,``,``,``,,,,``,,,`,-`-`,,`,,`,`,,`---
1.5
Tolerance. The resistance tolerance is identified by a single letter in accordance with Table II.
Figure 1. - Resistor outline drawing (see Table I).
S-311-P-683
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Table I. - Styles.
Style
1/
650
655
660
680
710
712
714
715
716
717
720
721
725
730
731
735
740
745
750
780
785
810
815
Power
Rating
@
125°C
(watts)
0.50
0.25
0.50
0.25
0.60
0.30
0.80
0.40
1.0
0.5
0.60
0.30
1.0
0.5
1.0
0.5
1.5
0.75
1.5
0.75
2.0
1.0
2.0
1.0
2.5
1.25
3.0
1.5
2.6
1.3
3.6
1.8
3.6
1.8
5.0
2.5
5.0
2.5
7.5
3.75
8.0
4.0
10.0
5.0
15.0
7.5
Maximum
Working
Voltage
(volts)
600
300
600
300
1,000
500
2,000
1,000
4,000
2,000
1,000
500
1,000
500
2,000
1,000
4,000
2,000
2,000
1,000
6,000
3,000
4,000
2,000
10,000
5,000
6,000
3,000
4,000
2,000
10,000
5,000
6,000
3,000
15,000
7,500
10,000
5,000
15,000
7,500
20,000
10,000
25,000
12,500
30,000
15,000
Tolerance
2/
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
D, F
B, C
Resistance 3/
Minimum
200Ω
200Ω
400Ω
600Ω
800Ω
800Ω
200Ω
400Ω
600Ω
600Ω
1kΩ
200Ω
1.5kΩ
500Ω
200Ω
750Ω
300Ω
1kΩ
400Ω
600Ω
800Ω
1kΩ
1kΩ
Maximum
5M
8M
10M
20M
50M
20M
20M
50M
75M
75M
150M
100M
200M
250M
150M
300M
300M
500M
500M
750M
1,000M
1,250M
2,000M
Dielectric
Strength
(volts)
750
750
750
750
750
750
750
750
750
750
750
750
750
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
Dimensions in Inches (Millimeters)
A
.313±.020
(7.95±.51)
.313±.030
(7.95±.76)
.500±.030
(12.70±.76)
.750±.030
(19.05±.76)
1.000±.040
(25.40±1.02)
.400±.060
(10.16±1.52)
.562±.060
(14.27±1.52)
.750±.060
(19.05±1.52)
1.000±.060
(25.40±1.52)
0.710±.050
(18.03±1.27)
1.500±.080
(38.10±2.03)
1.000±.050
(25.40±1.27)
2.000±.080
(50.80±2.03)
1.500±.080
(38.10±2.03)
1.000±.060
(25.40±1.52)
2.000±.080
(50.80±2.03)
1.500±.060
(38.10±1.52)
3.000±.100
(76.20±2.54)
2.125±.060
(53.98±1.52)
3.125±.060
(79.38±1.52)
4.000±.120
(101.60±3.05)
5.000±.120
(127.00±3.05)
6.000±.120
(152.40±3.05)
B
.094±.015
(2.39±.38)
.109±.025
(2.77±.64)
.094±.015
(2.39±.38)
.094±.015
(2.39±.38)
.094±.015
(2.39±.38)
.140±.030
(3.56±.76)
.150±.030
(3.81±.76)
.140±.030
(3.56±.76)
.140±.030
(3.56±.76)
.240±.030
(6.10±.76)
.140±.030
(3.56±.76)
.240±.030
(6.10±.76)
.140±.030
(3.56±.76)
.240±.030
(6.10±.76)
.315±.030
(8.00±.76)
.240±.030
(6.10±.76)
.315±.030
(8.00±.76)
.240±.030
(6.10±.76)
.315±.030
(8.00±.76)
.315±.030
(8.00±.76)
.315±.030
(8.00±.76)
.315±.030
(8.00±.76)
.350±.040
(8.89±1.02)
C
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.032±.002
(.81±.05)
.025±.002
(.64±.05)
.025±.002
(.64±.05)
.040±.002
(1.02±.05)
.025±.002
(.64±.05)
.040±.002
(1.02±.05)
.025±.002
(.64±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
.040±.002
(1.02±.05)
--`,,```,,,,``,``,``,,,,``,,,`,-`-`,,`,,`,`,,`---
1/ See 6.1
2/ See 1.5
3/ M = megohm
S-311-P-683
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Table II. - Resistance tolerance.
Letter
B
C
D
F
Resistance Tolerance
+ 0.1%
+ 0.25%
+ 0.5%
+ 1%
1.6
1.7
2.
2.1
S-311-P-683
--`,,```,,,,``,``,``,,,,``,,,`,-`-`,,`,,`,`,,`---
Temperature characteristic. The resistance temperature characteristic is independent of style or
resistance value within the given standard resistance ranges (see Table I). The temperature
characteristic is listed in Table III.
Table III. - Temperature characteristic.
Temperature Range
+15°C to +45°C
-15°C to +105°C
-55°C to +125°C
Temperature Characteristic
(referenced at +25°C)
± 40 ppm/°C
± 80 ppm/°C
± 140 ppm/°C
Performance characteristics. The performance of resistors procured to this specification shall be as
specified in Table IV.
APPLICABLE DOCUMENTS
Documents. The following documents, of the issue in effect on the date of invitation for bids or
request for proposal, form a part of this specification to the extent specified herein.
SPECIFICATIONS
MIL-I-45208
MIL-R-39032
QQ-S-571
STANDARDS
MIL-STD-202
MIL-STD-1285
Test Methods for Electronic and Electrical Component Parts
Marking of Electrical and Electronic Parts
Inspection Systems Requirements
Resistors, Packaging of
Solder; Tin Alloy, Tin-Lead Alloy, and Lead Alloy
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Table IV. - Performance characteristics.
Test
Thermal Shock
(see 3.5)
Dielectric Withstanding Voltage
(see 3.6)
Insulation Resistance
(see 3.7)
Overload/Overvoltage
(see 3.8)
Voltage Conditioning
(see 3.9)
Load Life
(see 3.10)
Shock
(see 3.12)
Vibration
(see 3.13)
Terminal Strength
(see 3.15)
∆R
∆R
All Styles
± 0.25%
± 0.15%
10,000 MEG (min)
dry
∆R
∆R
∆R
∆R
∆R
∆R
± 0.50%
± 0.50%
± 0.50%
± 0.25%
± 0.25%
± 0.20%
OTHER PUBLICATIONS
ASTM E595
SP 270-02
(Caddock)
GSFC S-311-533
2.2
Total Mass Loss and Collected Volatile Condensable Materials from
Outgassing in a Vacuum Environment, Standard Test Method for
Test Methods and Screening Procedure for Type HG,
HG(-15), HM, HS, and HV Resistors
Screening Procedure for Fixed Film, Precision High Voltage, High
Impedance Resistors Caddock MG Style
Order of precedence. In the event of any conflict between the text of this specification and the
references cited herein, the text of this specification shall take precedence. However, nothing in
this text shall supersede applicable laws and regulations unless a specific exemption has been
obtained.
Copies of documents. Copies of federal and military documents can be obtained from the
Standardization Document Order Desk, 700 Robbins Avenue, Building #4-Section D,
Philadelphia, PA 19111-5094. Copies of ASTM publications are available from the American
Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.
2.3
S-311-P-683
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