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.
MIL-DTL-3933/25 Attenuators
Specifications
Bodies and coupling nut Stainless steel per AMS-5640
Lock ring and contacts Beryllium copper per ASTM B196
Sleeve Brass per ASTM B16
Insulators PTFE per ASTM D1710
Gasket Silicone rubber per ZZ-R-765, Class I, IB, Grade 50/60
Resistor element Aluminum nitride substrate with tantalum nitride resistor, Gold plated terminations
SV Microwave • 2400 CentrePark West Drive • West Palm Beach, Florida 33409 USA
Telephone: 561.840.1800 •
www.svmicrowave.com
Fax: 561.842.6277
Performance
Material
Finish
Bodies and coupling nut Passivated per AMS-QQ-P-35, Type I I
Contacts and sleeve Gold per ASTM B 488, Type I I,
Grade C, Class 1.52, Over nickel per AMS-QQ-N-290, Class 1
Impedance 50 Ohms
Frequency range DC - 32.0 GHz
Average power 2.0 Watts (Note 1)
Peak power 500 Watts (Note 2)
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
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
MIL-DTL-3933/17 TNC Attenuators - DC to 18.0 GHz
MIL-DTL-3933/18 N Attenuators - DC to 12.4 GHz, DC to 18.0 GHz
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-3933/30 SVK(2.92mm) Attenuators - DC to 32.0 GHz
Electrical Characteristics
MIL-DTL-3933/25 Attenuators
Dash Number/dB Values
Frequency
DC t o 2. 0 GHz
Frequency
DC to 12.4 GHz
Frequency
DC to 18.0 GHz
Attenuation
dB Nominal
Dash
Number
Attenuation
dB No minal
Dash
Number
Attenuation
dB Nominal
Dash
Number
Attenuation
dB Nominal
Dash
Number
0.0
58 N/S
0.5
59 N/S
1.0
01 N/S
1.0
27 N/S
1.0
60 N/S
1.5
61 N/S
2.0
02 N/S
2.0
28 N/S
2.0
62 N/S
2.5
63 N/S
3.0
03 N/S
3.0
29 N/S
3.0
64 N/S
3.5
65 N/S
4.0
04 N/S
4.0
30 N/S
4.0
66 N/S
4.5
67 N/S
5.0
05 N/S
5.0
31 N/S
5.0
68 N/S
5.5
69 N/S
6.0
06 N/S
6.0
32 N/S
6.0
70 N/S
6.5
71 N/S
7.0
07 N/S
7.0
33 N/S
7.0
72 N/S
7.5
73 N/S
8.0
08 N/S
8.0
34 N/S
8.0
74 N/S
8.5
75 N/S
9.0
09 N/S
9.0
35 N/S
9.0
76 N/S
9.5
77 N/S
10.0
10 N/S
10.0
36 N/S
10.0
78 N/S
11.0
11 N/S
11.0
37 N/S
11.0
79 N/S
12.0
12 N/S
12.0
38 N/S
12.0
80 N/S
13.0
13 N/S
13.0
39 N/S
13.0
81 N/S
14.0
14 N/S
14.0
40 N/S
14.0
82 N/S
15.0
15 N/S
15.0
41 N/S
15.0
83 N/S
16.0
16 N/S
16.0
42 N/S
16.0
84 N/S
17.0
17 N/S
17.0
43 N/S
17.0
85 N/S
18.0
18 N/S
18.0
44 N/S
18.0
86 N/S
19.0
19 N/S
19.0
45 N/S
19.0
87 N/S
20.0
20 N/S
20.0
46 N/S
20.0
88 N/S
VSWR
Attenuation
Accuracy
(dB)
DC to 2
GHz
2 to 4
GHz
4 to 8
GHz
8 to 12.4
GHz
12.4 to 18
GHz
± .3
± .4
± .5
± .6
1.10 1.15 1.20 1.25 1.35
Attenuator
Increment
(dB)
0.5 to 6.5
7.0 to 8.5
9.0 to 14.0
15.0 to 20.0
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
SV Microwave QPL Attenuators Part Number Coding System
Inspection Capabilities
SV Microwave • 2400 CentrePark West Drive • West Palm Beach, Florida 33409 USA
Telephone: 561.840.1800 •
www.svmicrowave.com
Fax: 561.842.6277
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.
• 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
