Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
TB-2621
TB-2621, 40 Screw Terminal, High-Voltage, Terminal Block
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments TB-2621 Terminal Block
The TB-2621 is a Terminal Block. National Instruments developed the NI TB-2621 Terminal Block with the part number 779444-01. The TB-2621 is designed to provide connections to multiple types of 37-pin D-SUB devices by National Instruments. The NI TB-2621 Terminal Block is categorized as a CAT II device. The TB-2621 Terminal Block is equipped with a D-SUB connector, as well as screw terminals.
The National Instruments TB-2621 Terminal Block can be utilized with both high-voltage and low-voltage devices. The NI TB-2621 Terminal Block is fully compatible with 37-pin PXI devices, such as the NI-6521, NI-6510, NI-6520, NI-6516, NI-6519, NI-6517, and NI-6518. The TB-2621 provides connections for 37 input/output signals with a total of 40 screw terminals. The terminal connections require 16-30 AWG wire for the NI TB-2621 Terminal Block. A 37-pin high-voltage accessory keying kit can also be purchased for use with this Terminal Block, but the kit is an optional accessory.
The NI TB-2621 Terminal Block can be connected to the front panel of the industrial PXI device it is being used with. The National Instruments TB-2621 Terminal Block is UL-listed for CAT II with a voltage of 150 VDC/VAC. The NI TB-2621 Terminal Block features the maximum current rating of 2 A per conductor. The TB-2621 contains a strain-relief bar. The NI TB-2621 Terminal Block is designed with DC coupling.
TB-2621 Obsolete Status has been announced by National Instruments, but the Terminal Block will still be available for purchase and repairs by Apex Waves.
| Model | TB-2621 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 779444-01 |
| Type | Terminal Block |
| Compatible Devices | 37-pin D-SUB |
| Screw Terminals | 40 |
| Coupling | DC |
| Maximum Current | 2 A per conductor |
| Dimensions | 4.1 in. × 3.5 in. × 0.7 in. |
| Weight | 10 oz. |
| TB-2621 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
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Eligible returns may be accepted within 30 days at Apex Waves’ discretion. A 25% restocking fee applies; non-refundable and built-to-order products are excluded.
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