SMB Connector Specifications

Electrical Characteristics

Impedance — 50 ohms and 75 ohms, nominal

Frequency Range — 0 to 4.0 GHz

Voltage Rating (VRMS) —

Sea Level

70,000 Feet

50 ohm connectors for RG 178/U series cable

300

75

50 ohm connectors for RG 316/U series cable

400

100

75 ohm connectors for RG 179/U series cable

300

75

75 ohm connectors for RG 195/U series cable

500

125

Insulations Resistance — 1000 megohms min.

Contact Resistance — (milliohms max.)

After

Initial

Environment

Center contact

6.0

8.0

Outer contact

1.0

1.5

Braid to body

1.0

N/A

Contact Current Rating — 1.5 amps DC max.

Voltage Standing Wave Ratio (VSWR0 —

to 4.0 GHz or 80% of upper cutoff frequency of the cable, whichever is lower.

Mating Engagement

Cable

Straight

Right-Angle

RG 178/U Series

1.30 + .04F

1.45 + .06F

RG 316/U Series

1.25 + .04F

1.35 + .04F

F=GHz, does not apply to 75 ohm connectors.

RF High Potential Withstanding Voltage

Frequency — 5 MHZ

Leakage Current — N/A

50 ohm connectors for RG 178/U series cable

675 VRMS

50 ohm connectors for RG 316/U series cable

950 VRMS

75 ohm connectors for RG 179/U series cable

950 VRMS

75 ohm connectors for RG 195/U series cable

1225 VRMS

RF Leakage — –55 dB min. at 2-3 GHz

Insertion Loss — .30dB max. at 3 GHz

Mechanical Characteristics

Engagement Forces — 14 lbs. [62.3 N] maximum engagement initially.

After 500 matings, 14 lbs. [62.3 N] maximum engagement and 2 lbs. [8.8 N] minimum

disengagement for all of SMBs.

Cable Attachment —

Straight Connectors — Crimp, both center contact and braid

Right-Angle Connectors — Crimp on braid and bifurcated solder center contact

Durability — 500 cycles per MIL-C-39012

Contact Captivation — When captivated, the contacts will withstand 4.0 lbs.

minimum axial force.

Cable Retention — When properly assembled to the compatible braided coaxial

cable, the retention is equal to the breaking strength of the cable.

Marking — Per MIL-STD-130

Environmental Characteristics

Temperature Rating — –65°C to +165°C

Corrosion (salt spray) — MIL-STD-202, Method 101, test condition B, 5% salt

solution

Vibration High Frequency — MIL-STD-202, Method 204, test condition B

(15 G’s)

sine

Thermal Shock — MIL-STD-202, Method 107, test condition B, except high tem-

perature shall be +85°C. High temperature shall be +200°C for connectors using

200°C cables.

Moisture Resistance — MIL-STD-202, Method 106, when interface gasket is

used. No measurements of high humidity. Insulation resistance shall be 200

megohms minimum within five minutes after removal from humidity.

Durability Test — Conducted per MIL-C-39012 Reg. Para. 3.15, Method Para. 4.6.12

Materials

Body, Body Components and Male Contacts — Brass, half hard, per QQ-B-626,

Alloy 360, Zinc per QQ-Z-363

Female Contacts — Beryllium copper per QQ-C-530, heat treated per MIL-H-7199

Insulators — TFE fluorocarbon per ASTM D 1710, Type 1, Grade 1

Lockwashers — Phosphor bronze per QQ-B-750

Crimp Ferrule — Annealed copper alloy per WW-T-799

Gaskets — Silicone rubber per ZZ-R-765, Class 11B, Grade 65-75

Plating

Center Contacts — 0.00127 [.000050] min. Gold per MIL-G-452048 Type 1,

Grade C, Class 1, over 0.00254 [.000100] min. nickel per QQ-N-290

Other Metal Parts — Gold, Nickel or Solder plated to meet the Finish and

Corrosion requirements of MIL-C-39012

177

Catalog 1307191

Dimensions are in millimeters

Dimensions are shown for

USA: 1-800-522-6752

South America: 55-11-2103-6000

Revised 3-07

and inches unless otherwise

reference purposes only.

Canada: 1-905-470-4425

Hong Kong: 852-2735-1628

specified. Values in brackets

Specifications subject

Mexico: 01-800-733-8926

Japan: 81-44-844-8013

www.tycoelectronics.com

are standard equivalents.

to change.

C. America: 52-55-1106-0803

UK: 44-8706-080-208

RF Coax Connectors