The Signamax Voice-Grade MT-Series Keystone Jacks have been designed to support voice-transmission network applications and low-speed data-transmission applications. These connectors are slim in profile for high density applications and have the ability to mount either color-coded icons for service identification or dust covers to protect unused jacks from dust and other contaminants.
Special design features allow these jacks to be terminated with a standard 110 single-position tool or with the Signamax four-pair tool. The connector contact design provides enhanced plug-to-jack connection integrity, protects against damage caused by insertion of 4- or 6-position plugs, and is rated for a minimum of 750 plug insertions providing for the highest level of system reliability.
ANSI/TIA-568-C.2: meets or exceeds individual pair category 3 (up to 16 MHz) component specifications
Unscreened twisted pair (U/UTP)
6p6c (6-position, 6-contact) “RJ12” style
Three-pair USOC
22 to 24 AWG (0.644 to 0.511 mm)
Insulation Resistance: Min 500 MOhm @ 100 Vdc
Dielectric Withstanding Voltage: 1,000 Vdc/ac peak contact-to-contact @ 60 Hz for 1 min
Spring Wire Contact Resistance: Max 20 mOhm
IDC Contact Resistance: Max 2.5 mOhm
Current Rating: Refer to downloadable spec sheet.
Housing: High impact thermoplastic, UL94V-0 fire retardant
Jack Spring Wire: Phosphor bronze alloy plated with 50 μin of gold over 70 to 100 μin of nickel
IDC: 110 type, phosphor bronze alloy with 100 μin 100% tin alloy
Retention: 50 N (11 lbf) for 60 ± 5 s
Mating Cycle Life: Min 750 cycles
Standard keystone footprint
1.18” D x 0.67” W x 0.76” H (30.0 mm x 16.9 mm x 19.3 mm)
Operating Temperature: 14 °F to 140 °F (-10 °C to 60 °C)
Storage Temperature: -40 °F to 158 °F (-40 °C to 70 °C)
Operating RH: 93% Max (non-condensing)
ANSI/TIA-568-C.2, IEC 60603-7, FCC Part 68 Subpart F, UL 94V-0
X.21, V.11, S0/S1/S2 (ISDN BRI/PRI), ADSL, VDSL, TR-4, TR-16
5-year Limited Component
10-year Signamax Base Trunk
15-year Signamax Extended Component
25-year Signamax Cabling System
Individual Packaging
| Part Number | Description | |
| KJ126MT-C3U | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Light Ivory | |
| KJ126MT-C3U-WH | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, White | |
| KJ126MT-C3U-DI | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Dark Ivory | |
| KJ126MT-C3U-YE | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Yellow | |
| KJ126MT-C3U-OR | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Orange | |
| KJ126MT-C3U-RD | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Red | |
| KJ126MT-C3U-BU | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Blue | |
| KJ126MT-C3U-GN | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Green | |
| KJ126MT-C3U-GY | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Gray | |
| KJ126MT-C3U-BK | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Black |
Contractor Packaging – 25 Pack
| Part Number | Description | |
| KJ126MT25-C3U | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Light Ivory, 25-Pack | |
| KJ126MT25-C3U-WH | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, White, 25-Pack | |
| KJ126MT25-C3U-YE | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Yellow, 25-Pack | |
| KJ126MT25-C3U-OR | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Orange, 25-Pack | |
| KJ126MT25-C3U-RD | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Red, 25-Pack | |
| KJ126MT25-C3U-BU | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Blue, 25-Pack | |
| KJ126MT25-C3U-GN | Voice-Grade 6P6C MT-Series Keystone Jack, USOC Wiring, Green, 25-Pack |
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