MIL-DTL-3933/25 Attenuators
SV Microwave offers military SMA attenuators in accordance with MIL-DTL-3933/25. QPL - 3933 parts are designed and
made under DSCC qualifications in order to withstand harsh environments within military applications. Hi-Rel versions
also available.
These fixed SMA coaxial attenuators operate under low power and frequency range of DC - 2 GHz up to
DC - 18 GHz. These attenuators are small in size and are used in applications where space is at a premium.
Specifications
Material
Bodies and coupling nut
Lock ring and contacts
Sleeve
Insulators
Gasket
Resistor element
Stainless steel per AMS-5640
Beryllium copper per ASTM B196
Brass per ASTM B16
PTFE per ASTM D1710
Silicone rubber per ZZ-R-765, Class I, IB, Grade 50/60
Aluminum nitride substrate with tantalum nitride resistor, Gold plated terminations
Finish
Bodies and coupling nut
Contacts and sleeve
Passivated per AMS-QQ-P-35, Type I I
Gold per ASTM B 488, Type I I,
Grade C, Class 1.52, Over nickel per AMS-QQ-N-290, Class 1
Performance
Impedance
Frequency range
Average power
Peak power
Notes:
1. Power input related linearly from 25°C to .5 Watts at 125°C.
2. Peak power for a duty cycle of 5 x 10-4
50 Ohms
DC - 18.0 GHz
2.0 Watts (Note 1)
500 Watts (Note 2)
SV Microwave is qualified to manufacture MIL-DTL-3933 Attenuators including:
MIL-DTL-3933/14
SMA Attenuators - DC to 12.4 GHz
MIL-DTL-3933/16
SMA Attenuators - DC to 18.0 GHz
SV Microwave • 2400 CentrePark West Drive • West
- DC
Beach, Florida 33409 USA
MIL-DTL-3933/17
TNC Attenuators
Palm
to 18.0 GHz
Telephone: 561.840.1800 • Fax: 561.842.6277
MIL-DTL-3933/18
N Attenuators - DC to 12.4 GHz, DC to 18.0 GHz
www.svmicrowave.com
MIL-DTL-3933/19
BNC Attenuators - DC to 4.5 GHz
MIL-DTL-3933/25
Miniature SMA Attenuators - DC to 18.0 GHz
MIL-DTL-3933/25 Attenuators
SV Microwave QPL Attenuators Part Number Coding System
To more easily illustrate the ordering procedure for SV Microwave QPL Attenuators, part number
M3933/25-74S
is shown
below:
M3933
/25
-74
S or N
Military designator
Attenuator
Connector interface series
SMA
Dash number designation on specification sheet
18.0 GHz with attenuation of 8.0 dB
S =
Screened
N
= Non-Screened
Dash Number/dB Values
Frequency
DC to 2.0 GHz
Attenuation
dB Nominal
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
Dash
Number
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
Frequency
DC to 12.4 GHz
Attenuation
dB Nominal
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
Dash
Number
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
N/S
Attenuation
dB Nominal
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
Frequency
DC to 18.0 GHz
Dash
Number
58 N/S
60 N/S
62 N/S
64 N/S
66 N/S
68 N/S
70 N/S
72 N/S
74 N/S
76 N/S
78 N/S
79 N/S
80 N/S
81 N/S
82 N/S
83 N/S
84 N/S
85 N/S
86 N/S
87 N/S
88 N/S
Attenuation
dB Nominal
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
Dash
Number
59 N/S
61 N/S
63 N/S
65 N/S
67 N/S
69 N/S
71 N/S
73 N/S
75 N/S
77 N/S
Electrical Characteristics
Attenuator
Increment
(dB)
0.5 to 6.5
7.0 to 8.5
9.0 to 14.0
15.0 to 20.0
Attenuation
Accuracy
(dB)
± .3
± .4
± .5
± .6
DC to 2
GHz
2 to 4
GHz
VSWR
4 to 8
GHz
8 to 12.4
GHz
12.4 to 18
GHz
1.10
1.15
1.20
1.25
1.35
SV Microwave Screening Capabilities IAW MIL-DTL-3933
SV Microwave possesses the capability not only to manufacture military connectors that meet the DSCC
specifications, but also to test and certify them. With extensive in-house testing capabilities, we ensure that
when our products are placed in military environments, they will be able to support crucial airborne and
terrestrial applications. In-house testing capabilities include MIL-DTL-3933 screening and material
inspection.
SV Microwave offers innovative solutions to satisfy your requirements. We have invested in a talented
engineering staff, supported by state-of-the-art, high-frequency RF simulation design software. Our full
service laboratories perform comprehensive environmental mechanical and electrical testing. We control
virtually all processes with in-house machining, fabrication, assembly and acceptance and qualification testing.
Using our in-house testing capabilities eliminates the need for outsourcing environmental test requirements,
which results in a lower delivered cost and shorter lead-time.
Inspection Capabilities
• Thermal Shock
• Conditioning
• Stability of attenuation: after peak power
• Pre-burn-in electrical:
DC resistance
VSWR
Attenuation
• Burn-in 240 hours
• Post-burn-in electrical:
DC resistance
VSWR
Attenuation
• Radiograhic inspection
SV Microwave • 2400 CentrePark West Drive • West Palm Beach, Florida 33409 USA
Telephone: 561.840.1800 • Fax: 561.842.6277
www.svmicrowave.com
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