High Current S series terminal blocks | Leading source of dependable electrical components | Curtis Industries Electrical Components for Industry

Type S

Features

Heavy Load Termination Flexibility - Designed for machine, switchboard and other heavy load terminations.

Tubular High Pressure Solderless Connections - Accomodates wire without lugging - tapped side-walls for greater mechanical strength - electrolytically pure copper solderless connections provide 100% conductivity.

Readily Adaptable to Special Applications - Can be used for branch circuit termination with simple modification of standard terminal plate.

Combined Style Design Capability - All types can be combined with each other as well as Types H and BT.

Ratings and Wire Sizes to Match High Current Needs - Type L is rated at 100 amps/600 volts UL recognized for wire up to No. 1AWG. Type O: 125 amps/600 volts UL recognized for wire up to No.1/0AWG. Type S: 225amps/600 volts and UL recognized for wire up to 4/0AWG (Note: UL requires the use of UL recognized lugs).

Heavy Load Ratings and Wire Sizes - Type T - rated 125 amps/600 volts - has headless slotted screw - UL recognized for No. 6AWG to No. 1/0AWG wire. Type U is rated 250 amps/600 volts and features headless socket screw UL recognized for No. 6AWG to 250MCM wire.

Recognized under the Components Program of Underwriters Laboratories, Inc. Standard 1059, Guide No.XCFR2, File No.E62557.

Guide No.184-N-90, Report No.LR39186-1.

Variations
S Terminal bar and 3/8" hex-head screw, Max. lug width - 1"

Terminal Designations

S	Nickel-plated brass terminal bar with 3/8" plated hex-head steel screws. Accepts wire up to No. 4/0AWG.

Engineering Specifications

Wire Range:	UL Recognized -
	Type S -to No.4/0AWG.

Number of Terminals: 1 thru 4

Voltage Rating: 600 volts CSA and UL.

Tightening Torque: 200in.-lb

Current Rating: 225 amps

NOTE: Specifications contained herein are subject to change without notice.

Housing:

Material	Phenolic

Continuous Use Temp. (UL Index)	150°C (302°F)

Flammability Rating	94V-1

Water Absorption (24hrs. % wt. gain)	.05%

Chemical Resistance	Resistant to most organic solvents.

Breakdown Voltage

Terminal - Terminal
Terminal - Ground

10,400V Typ.
10,500V Typ.

Dimensions
NOTE: Lugs are not furnished with blocks

NOTE: mm dim. are shown in parentheses.

No. of Terminals	Mounting Dimensions		Overall Dimensions
No. of Terminals	Inches	Metric (mm)	inches	Metric (mm)
1	3.440	87.38	3.940	100.08
2	5.856	148.74	6.356	161.44
3	8.271	210.09	8.771	222.79
4	10.687	271.44	11.187	284.14
Dimensions shown are +/-.030"

NOTE: Thru-bolt construction is amply strong for normal applications, but if excessive mechanical loads are expected, strain relief should be provided. Chart lists dimensions for up to six terminals per block, but longer lengths are available. Tie-down points are recommended for blocks exceeding four terminals for type U and six terminals for Type T.

How to Order

Types L, O, S, T and U terminal blocks are ordered by listing a composite number made up of the model designation followed by the number of terminals required for the application. Example: four-pole terminal block becomes stock number L-4, O-4, S-4, T-4 or U-4.

When ordering combinations of both types, the composite number is made up of both model designations followed by total number of poles and number of each type. A composite of two T terminals followed by two U terminals thus is converted to stock number TU-4 (2T, 2U). Combining these types with Types L, O, S, H and BT would follow the same ordering format. (Note - when combined with types H or BT a special adapter is required).


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