Terms & Conditions of Sale

MAR-BAL Products

Custom Parts by Application

Engineered Composite Materials

Standoff Insulators

Fire Resistant Wastebasket

Product Overview

UL Certification Info

Mar-Bal’s Capabilities

Round 4000 Series Insulators

UL E84767

	*Physical and Electrical Properties*
	Tensile Strength (lbs.)	2500-2700
	Cantilever Strength (in. lbs)	2500-3750
	Compression Strength (lbs.)	17000
	Thread Stripping Torque (ft. lbs.)	30
	Dielectric Strength (volts S.T.)	15000
	Arc Resistance (sec. ASTM D495)	180 +
	Water Absorption (% in 24 hrs. @ 23°c)	0.15
	Height Tolerance(in.)	±.015
	Creep Distance (in.)	1/4"+Ht.
	UL subject 94 Flame Resistance	94 V-0

Part Number	Suggest Indoor Voltage	Carton Quantity	UL File Number	Shape	Diameter	Height	Insert Size	Type
R4150-A3	1500	200	UL E84767	Round	1-3/4	1-1/2	5/16-18 x 3/8	Aluminum
R4150-S3	1500	200	UL E84767	Round	1-3/4	1-1/2	5/16-18 x 3/8	Steel
R4150-A4	1500	200	UL E84767	Round	1-3/4	1-1/2	3/8-16 x 3/8	Aluminum
R4150-S4	1500	200	UL E84767	Round	1-3/4	1-1/2	3/8-16 x 3/8	Steel
R4162-A4	1600	175	UL E84767	Round	1-3/4		3/8-16 x 3/8	Aluminum
R4175-A3	2000	175	UL E84767	Round	1-3/4	1-3/4	5/16-18 x 3/8	Aluminum
R4175-A4	2000	175	UL E84767	Round	1-3/4	1-3/4	3/8-16 x 3/8	Aluminum
R4175-S4	2000	175	UL E84767	Round	1-3/4	1-3/4	3/8-16 x 3/8	Steel
R4187-A5	2000	175	UL E84767	Round	1-3/4	1-7/8	3/8-16 x 9/16	Aluminum
R4200-A3	2500	150	UL E84767	Round	1-3/4	2	5/16-18 x 3/8	Aluminum
R4200-A4	2500	150	UL E84767	Round	1-3/4	2	3/8-16 x 3/8	Aluminum
R4200-S4	2500	150	UL E84767	Round	1-3/4	2	3/8-16 x 3/8	Steel
R4200-A5	2500	150	UL E84767	Round	1-3/4	2	3/8-16 x 9/16	Aluminum
R4200-S5	2500	150	UL E84767	Round	1-3/4	2	3/8-16 x 9/16	Steel
R4225-A5	2700	108	UL E84767	Round	1-3/4	2-1/4	3/8-16 x 9/16	Aluminum

+ All Insulators Listed Can Also Be Molded Using MAR-BAL High Track Resistant-Supertrack MB4000 Compound
+ Metric Insulators available upon request
+ 25 KV Insulator available upon request

Click to view UL card
Click to view Cross Reference List of Insulators