SMA

The SMA threaded interface connectors are designed for higher frequency applications where maximum reliability and robustness is required.

This connector range is suitable for the standard ranges of flexible and semi rigid cables and is also available in PCB and panel mount versions.

The characteristic impedance of the SMA coaxial connector is 50 ohm.

Two ranges of the SMA connectors are available: The standard range is manufactured with brass housings and the special range is manufactured with stainless steel housings.

SMA coaxial connectors meet the specification of IEC 169-15 and MIL-C-39012.

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Electrical characteristics

Impedance	50 Ohm
Operating frequency Semi-rigid cable Flexible Cable	DC-18 GHz DC-12,4 GHz
VSWR-Value Straight connector semi-rigid cable Angle connector semi-rigid cable Straight connector flexible cable Angle connector flexible cable	1,02 + 0,010 f (GHz) 1,04 + 0,015 f (GHz) 1,03 + 0,010 f (GHz) 1,05 + 0,030 f (GHz)
Withstand voltage (depending on cable type) Semi-rigid cable Flexible cable	≥ 1000 V / 50 Hz ≥ 750 V / 50 Hz
Operating voltage (depending on cable type) Semi-rigid cable Flexible cable	≤ 335 V / 50 Hz ≤ 250 V / 50 Hz
Insertion loss Straight connector semi-rigid cable Angle connector semi-rigid cable Straight connector flexible cable Angle connector flexible cable	0,03 √ f (GHz) dB 0,05 √ f (GHz) dB 0,03 √ f (GHz) dB 0,07 √ f (GHz) dB
RF-leakage Straight and angle connector Semi-rigid cable Straight and angle connector Flexible cable	≥ 100 dB-f (GHz) ≥ 100 dB-f (GHz) ≥ 60 dB-f (GHz) ≥ 60 dB-f (GHz)
Insulation resistance	≥ 10 GOhm
Contact resistance Center contact Outer contact	≤ 3 mOhm ≤ 2 mOhm
Current carrying capacity	≤ 2 A DC
Admissible power (depends on: Frequency, Application, VSWR, Environmental specification Characteristics)	Data on request
Intermodulation parameters	Data on request

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Mechanical characteristics

Coupling nut torque Recommended: Standard (Brass) Recommended: Special (Stainless steel) Max.: Standard (Brass) Max.: Special (Stainless steel)	0,45 Nm (4 in.-lbs) 0,8 - 1,1 Nm (7 - 9,7 in.-lbs) 0,6 Nm (5,3 in.-lbs) 1,7 Nm (15 in.-lbs)
Retention force of coupling nut	> 270 N (60 lbs)
Mating cycles	> 500

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Environmental specification

Operating temperature range	-55 °C (-67 °F) up to +125 °C (257 °F)
Test categories	DIN 40045 / IEC 55/125/56
Relative humidity	MIL-STD-202 Method 106
Thermal shock	MIL-STD-202 Method 107 Cond.B
Shock	MIL-STD-202 Method 213 Cond.I
Vibration	MIL-STD-202 Method 204 Cond.D
Corrosion	MIL-STD-202 Method 101 Cond.B

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Materials

Housing / Coupling nut: Standard Housing / Coupling nut: Special	Brass Stainless Steel
Center contact	Brass
Spring loaded contacts	Copper beryllium Bronze
Spring washer	Bronze
Crimp ferrule	Copper Brass
Lock washer	Bronze
Insulator	PTFE
Gasket	Silicone rubber
All products are RoHS conform.

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Plating

Housing Standard	Au, White bronze
Stainless steel Special	passivated
Center contact	Au
Spring loaded contacts	Au
Crimp ferrule	Au, White bronze
Lock washer	Au, White bronze
Other platings on request.

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Interface dimensions

Plug

Jack

	Plug		Jack
	mm		mm
	min.	max.	min.	max.
A		4,59	4,6	4,67
B		0,25		0,25
C		0,18 (1)		0,18 (1)
D		2,54	2,92 (2)
E	1,24	1,29	1,24	1,29
F	0,38	1,14	1,88	1,98
G		3,43	0,38	1,14
H	0,9	0,94	5,28	5,49
I			4,32
K			5,54
L		0,38
Z	1/4-36 UNS-2B		1/4-36 UNS-2A

(1) IEC Norm plug
(2) IEC Norm jack

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Some connectors may have a specification that differs from the above mentioned data.

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SMA