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HEAVY DUTY 1/4" COMMERCIAL PHONE PLUGS

SERIES 188 AND 299 PLUGS

click here to download a schematic drawing
(you will need to have Adobe Acrobat installed on your system to do this)

* Switchcraft's 188 is more heavy-duty than our
competitor's biggest 1/4" commercial phone plugs.
* Large curved tip solder terminal makes it easier to
solder to heavy gauge wires.
* Longer sleeve terminal allows more room to make
sleeve solder connections.
* Extra-large cable clamp securely grips cable of up
to .450" in diameter.
* Will easily accommodate some varieties of four
conductor 14 gauge wire and parallel two conductor
12 gauge wire.
* Bendable tab on sleeve terminal makes
termination easier by holding down cable while soldering.
In addition, such mechanical retention makes for a
superior solder connection.
* Will handle up to 15 A. rms (maximum).
SPECIFICATIONS
Contact Resistance (typical *D.O.M.J.):< 0.020 ohms.
Dielectric Withstand Voltage: 500 VAC (minimum).
Insulation Resistance @ 500 VDC: 2,000 megohms
(minimum).
Insulation Resistance (after MIL-STD-202 Salt Spray): 1,000 megohms (minimum).
Working Voltage: 250 VAC, 140 VDC.
Current Carry @ Working Voltage For 188 Plug (typical *D.O.M.J.) : 15.0 AMPS.
Current Carry @ Working Voltage For 299 Plug (typical *D.O.M.J.) : 6.0 AMPS.
Insert/Withdrawal Force: *D.O.M.J..
Soldering Requirement: ANSI/J-STD-001.
Temperature Range: -40° to + 85° Centigrade
U.L. Component Recognition File No.: E118169.
Life: *D.O.M.J.
Maximum Cable Size For 188 Plug: 12 AWG stranded,
up to .450" diameter.
Maximum Cable Size For 299 Plug: .290" diameter.
MATERIALS
Tip: Nickel-plated copper alloy.
Sleeve: Nickel-plated copper alloy.
Handle: Nickel-plated copper alloy.
Tip Terminal: Copper alloy, electrotin-plated.
Cable Clamp: Copper alloy, electrotin-plated.
Insulators For 188 Plug: Thermojet plastic,
thermoplastic, thermoplastic film, P.P.O.
Insulators For 299 Plug: Thermoplastic,
thermoplastic film, glass epoxy.
*D.O.M.J. - Dependent On Mating Jack

Part
Number
Maximum Cable Size
Mating
Jack

188
.450" Diameter
Z15J

299 .290" Diameter Z15J

MM CONVERSIONS

Series
Catalog
Dimension + tol/-tol Range mm equiv. Use

Series 188 3.127 79.4258
79.43

2.063 52.4002 52.40

0.688 17.4752
17.48

0.453 11.5062
11.51

1/4
0.250 6.35 6.4

1.000 25.4
25.40

Series 299 2.736
69.4944 69.49

1.188 30.1752
30.18

0.047 1.1938
1.19

1/4
0.250 6.35 6.4

1.625 41.275
41.28

0.500 12.7 12.70

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Part Number	Maximum Cable Size	Mating Jack
188	.450" Diameter	Z15J
299	.290" Diameter	Z15J

MM CONVERSIONS
Series	Catalog Dimension	+ tol/-tol	Range	mm equiv.	Use

Series 188	3.127			79.4258	79.43
	2.063			52.4002	52.40
	0.688			17.4752	17.48
	0.453			11.5062	11.51
1/4	0.250			6.35	6.4
	1.000			25.4	25.40

Series 299	2.736			69.4944	69.49
	1.188			30.1752	30.18
	0.047			1.1938	1.19
1/4	0.250			6.35	6.4
	1.625			41.275	41.28
	0.500			12.7	12.70