
NEMA Terminal Blocks
Heavy Duty — Phenolic
310
Thomas & Betts Electronics/OEM Division Tel: 901-252-7766 Fax: 901-252-1312
LR25557
E63810
Dimensions shown are for reference only. Dimensions are in inches.
200 SERIES
HEAVY DUTY
PHENOLIC
600 V, 0.56" PITCH
STRAP SCREW
STRAP CLAMP
TUBULAR SCREW
TUBULAR CLAMP
CHARACTERISTICS
Type of Block
Model
Direct Mount (Flat Base)
Painted
221
228-BU
222-BU
223-BU
Unpainted
211
218
212
213
Channel Mount (Dovetail Base)
Painted
0221
0228
0222
0223
Unpainted
0211
0218
0212
0213
Contact Type
Specifications
Wire Range (AWG)
Solid & Stranded
22-10
18-8
18-4
18-6
Wire Strip Length (in.)
—
1/
2
1/
2
1/
2
Screw Type
10-32
8-32
1/4-28
slotted binding head
pan head w/clamp
slotted headless
Ampacity
35 A
50 A
85 A
65 A
End Sections
Direct Mount
230-BU
Channel Mount
0230
NOTE: Standard packaging is 40 pieces for contact and 25 pieces for end sections.
NOTES:
For factory assembled blocks, suffix catalog number with
number of blocks desired. (Maximum number of flat base
preassembled sections is 12).
Example: Twenty dovetail based, tubular clamp blocks,
preassembled on channel = 021320 (plain marking area)
Example: Twelve preassembled flat base, strap screw
blocks = 22112 (painted marking area)
For factory assembled blocks supplied with a removable
marking strip add — 1 to catalog number.
For blocks with two or more different contact sections,
imprinted marking strips, or special features, consult
factory.
Environmental contacts for highly corrosive atmospheres
are available with nickel plating on non-ferrous hardware.
To order, prefix catalog # with “D”.
Comparison (Type of Block)
Direct Mount
Channel Mount
(Flat Base)
(Dovetail Base)