The Mar-Bal Engineering Team has recently collaborated with our key customers to design, develop and introduce the ISO Metric Series of Standoff Insulators to provide our global customers, especially those in Asia, with electrical component solutions that have higher voltage ratings, a new insert design for strength and an improved supply chain availability. This product development advancement and NEW product line from Mar-Bal can be found in the traditional electrical and industrial applications like panel boards, switchgears and transformers among many others; however, with the increased voltage rating and stronger insert design, this NEW ISO Series product line is being specified in new WIND and SOLAR applications as well.
Brief Summary
- Metric Heights
- Standoff Insulators Manufactured with the Mar-Bal BMC Compound utilizing the Compression Molding process
- The ISO Series has Global Distribution
- Voltage 1,000V – 4,500V
- Dielectric Strength (volts S.T.) 10,000V – 60,000V
- Arc Resistance(sec. ASTM D495) 180+
- Water Absorption (% in 24 hrs.@23℃) 15
- UL subject 94 Flame Resistance UL 94 V-0
- Operating Temperature -40℃ – 130 ℃
- Leakage Currents < 0.1 mA
- Resistance > 2000 mΩ
- Certificates & Standards UL, RoHS, REACH, CE, MSDS
New Insert Design
- The ISO series utilizes Steel inserts as standard, better thread stripping torque
- The ISO Series has a Newly designed insert with bigger and hexagon bottom end, catching more insulation material tightly to improve mechanical performance
- The Insulator has a bigger insert face end to strengthen resisting lateral force
Technical Data
Mar-Bal Metric Height Insulators-ISO Series | |||||||||||
Shape | Model | Height mm |
Diameter mm |
Insert | Creep Distance mm |
Voltage V |
Tensile N |
Cantilever N |
Torque Nm |
Weight g |
Package (pcs/case) |
Hex | ISO-MBI-25M6 | 25 | 25.4 | M6 | 26 | 1000 | 5300 | 2000 | 15 | 35 | 100 |
Hex | ISO-MBI-30M6 | 30 | 25.4 | M6 | 31 | 1000 | 5300 | 2000 | 15 | 40 | 100 |
Hex | ISO-MBI-30M8 | 30 | 25.4 | M8 | 31 | 1000 | 6600 | 2800 | 35 | 40 | 100 |
Round | ISO-MBI-R35M6 | 35 | 44.5 | M6 | 38 | 1000 | 8000 | 4000 | 15 | 105 | 100 |
Round | ISO-MBI-R35M8 | 35 | 44.5 | M8 | 38 | 1000 | 10400 | 5000 | 35 | 105 | 100 |
Round | ISO-MBI-R35M10 | 35 | 44.5 | M10 | 38 | 1000 | 10400 | 6000 | 85 | 105 | 100 |
Round | ISO-MBI-R40M6 | 40 | 44.5 | M6 | 43 | 1500 | 8000 | 4000 | 15 | 115 | 100 |
Round | ISO-MBI-R40M8 | 40 | 44.5 | M8 | 43 | 1500 | 10400 | 5000 | 35 | 115 | 100 |
Round | ISO-MBI-R40M10 | 40 | 44.5 | M10 | 43 | 1500 | 13000 | 6000 | 85 | 115 | 100 |
Round | ISO-MBI-R45M6 | 45 | 44.5 | M6 | 48 | 2000 | 8000 | 4000 | 15 | 125 | 100 |
Round | ISO-MBI-R45M8 | 45 | 44.5 | M8 | 48 | 2000 | 10400 | 5000 | 35 | 127 | 100 |
Round | ISO-MBI-R45M10 | 45 | 44.5 | M10 | 48 | 2000 | 13000 | 5000 | 85 | 129 | 100 |
Round | ISO-MBI-R50M8 | 50 | 44.5 | M8 | 53 | 2500 | 10400 | 4000 | 35 | 145 | 100 |
Round | ISO-MBI-R50M10 | 50 | 44.5 | M10 | 53 | 2500 | 13500 | 4000 | 85 | 145 | 100 |
Oct | ISO MBI 60M12 | 60 | 63.5 | M12 | Coming Soon | ||||||
Oct | ISO MBI 70M12 | 70 | 63.5 | M12 | Coming Soon | ||||||
Oct | ISO MBI 80M16 | 80 | 63.5 | M16 | Coming Soon | ||||||
Steel insert as standard; Alum and Brass inserts are available as requested |
Engineering and Technical Drawings
ISO-MBI-25MM | ![]() |
ISO-MBI-30MM | ![]() |
ISO-MBI-40MM | |
ISO-MBI-50MM | |
ISO-MBI-60MM | |
ISO-MBI-R35MM | ![]() |
ISO-MBI-R40MM | ![]() |
ISO-MBI-R45MM | ![]() |
ISO-MBI-R50MM | ![]() |
Cross Reference Chart
PentAir/Erico Part # | Mar-Bal ISO Series Part # |
ISO TP 25M6 | ISO MBI 25M6 |
ISO TP 30M6 | ISO MBI 30M6 |
ISO TP 30M8 | ISO MBI 30M8 |
ISO TP 35M6 | ISO MBI R35M6 |
ISO TP 35M8 | ISO MBI R35M8 |
ISO TP 35M10 | ISO MBI R35M10 |
ISO TP 40M6 | ISO MBI R40M6 |
ISO TP 40M8 | ISO MBI R40M8 |
ISO TP 40M10 | ISO MBI R40M10 |
ISO TP 45M6 | ISO MBI R45M6 |
ISO TP 45M8 | ISO MBI R45M8 |
ISO TP 45M10 | ISO MBI R45M10 |
ISO TP 60M10 | ISO MBI 60M10 |