Skip to content
#1 Source in low voltage wire and cable. Call us today to learn more about special offers.
#1 Source in low voltage wire and cable. Call us today to learn more about special offers.

66 Wiring Block, Unwired w/ Snap-On Cover

by Dynacom
SKU: PP7-319/66
UL Listed RoHS Compliant


66 Wiring Block, Unwired

Dynacom's 66 block is a punch down block containing rows of four IDC style clips. It is used for terminating 22-26 AWG solid copper cross-connect station wiring for many types of phone systems. Bridge clips are required to complete the circuit between the left and right side of the 66 block.



  • 50-Pair
  • CAT5 Rated
  • IDCs are Tin Plated Brass
  • Clear, Snap-On Cover Included
  • Hinged Cover Available Separately



Temperature Range
Storage -40º to +70º C
Operation -10º to +60º C
Relative Humidity (Operational) Maximum Noncondensing 93%

Insulation Resistance 500 MΩ min. @ 100V d.c
Dielectric Withstanding Voltage 1000V RMS @ 60Hz for 1 min
Spring Wire Contact Resistance 20 mΩ Max
IDC Contact Resistance 2.5 mΩ Max

Total Contact Force 800 Grams for A 8 Wire Leads Minimum
Retention 50N (11 Ibf) for 60s ± 5s
Insertion / Extraction Life 750 Cycles Minimum
IDC Wire Gauge 22 ~ 26 AWG

Housing / Bezel High-Impact, Flame-Retardant Plastic, UL-94V0
Spring Wire Phosphor Bronze Alloy Plated with 50 Micro-inch of Gold Over 70~100 Micro-inch of Nickel
IDC Brass Plated with 100 Micro-inch of Sn

Additional Information

Telco Block Accessories

Telco blocks are utilized to connect phone systems to data networks. There are two popular forms of telco blocks: the 66 block and the 110 block. The 66 block is quite common in modern phone systems, as they simplify connecting multiple phone lines. The 66 block is also referred to as B-blocks, M-blocks, and as split-50 blocks. We also have Cable Distribution Spools, or mushroom posts for managing your cross connect wire. It is designed for mounting onto walls or other surfaces to help support and guide your cross connect wire. Our cable distribution spools are also ideal for Cat3 cable for telephone applications.

To learn more about our Telco Block Accessories please visit our overview page. Our 66 Wiring Blocks can be combined with a wide array of products such as:

What’s In The Box

What’s In The Box

Minimum Order Requirement:
  • Qty 1 - Package of (9) 66 Wiring Blocks w/ Snap-On Cover