---
product_id: 424761086
title: "LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red)"
brand: "lby"
price: "391 DH"
currency: MAD
in_stock: true
reviews_count: 11
category: "Lby"
url: https://www.desertcart.ma/products/424761086-lby-4pcs-busbar-insulator-sm-40-polyester-standoff-insulators-screw
store_origin: MA
region: Morocco
---

# 600V operating voltage rating Heat resistant up to 2500°F M8 screw for secure fastening LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red)

**Brand:** lby
**Price:** 391 DH
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your panel with precision and protection!

## Quick Answers

- **What is this?** LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) by lby
- **How much does it cost?** 391 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/424761086-lby-4pcs-busbar-insulator-sm-40-polyester-standoff-insulators-screw)

## Best For

- lby enthusiasts

## Why This Product

- Trusted lby brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact 40mm Height:** Space-saving design fits perfectly in tight power distribution cabinets.
- • **Complete 4-Piece Set:** Everything you need for quick, professional-grade busbar installation—no compromises.
- • **Premium Resin Insulation:** High-strength polyester resin offers superior electrical insulation and fire resistance.
- • **Robust M8 Screw Fastening:** Ensures rock-solid, vibration-proof busbar connections for your power setup.
- • **High Voltage & Pulse Endurance:** Rated for 600V operating and 5000V pulse voltage to handle demanding electrical loads.

## Overview

The LBY SM-40 Busbar Insulator Set features four high-strength polyester resin standoff insulators with M8 copper screws, designed for secure, insulated busbar connections in power distribution cabinets. Rated for 600V operating voltage and heat resistant up to 2500°F, these compact 40mm insulators deliver excellent electrical insulation, mechanical strength, and durability, making them an essential upgrade for professional electrical installations.

## Description

LBY Wire Junction Post SM-40 Polyester Standoff Insulated Junction Post with Screw ● Product: - SM-40 - Height: 40 mm - Material: resin - Nut size: M8 - Nut material:copper - Screw hole depth:10.5mm - Strength: axial tensile 3000N, bending 5000N, tightening torque 15N/ m - Insulation resistance >1000MΩ - Electrical properties: Operating voltage:600V, pulse voltage:5000V - Leakage current <1mA at 2000V operating voltage - Minimum arc distance: 15 (mm) ● Package: - SM-40 ------- 4pcs ● Description: - The product is generally cylindrical, with one screw hole at each end and a screw to fix the line that needs to be connected. - Widely used in high low power distribution cabinet.For power distribution, transmission, fixing copperor alumnium busbar, etc, play the role of insulation and connection. - Good electrical resistance, heat resistance, fire resistance, low shrinkage and water resistance.Excellent texture and good workmanship are your choice.

Review: Insulated electrical stand offs - Worked great for mounting bus bars in an electric panel, good robust parts
Review: High Quality - The resin body is very tough. I appreciate having complete dimensions, since i'm using them in a tight space. I do worry about the long-time corrosion-resistance of the 'chromate-like' plating on the screws; wish they were stainless steel.

## Features

- 1.SM-40(with screw)enhanced busbar insulator connector, complex insulators.
- 2.Material: resin; Colour: red.
- 3.Size : SM-40: product height: 40mm(1.57'').
- 4.Contains: 4 pieces, with screw(M8).
- 5.Use: widely used in high low power distribution cabinet, play the role of minsulation and connection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09H387424 |
| Best Sellers Rank | #90,487 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #500 in Butt Terminals #22,632 in Electrical Equipment |
| Brand | LBY |
| Color | red |
| Connector Gender | Male |
| Connector Type | Screw |
| Contact Material | Copper |
| Date First Available | September 24, 2021 |
| Insulation Material | resin |
| Item Weight | 15.2 ounces |
| Item model number | LBY-034-8 |
| Manufacturer | LBY |
| Material | Polyester |
| Maximum Voltage | 600 Volts |
| Number of Items | 4 |
| Package Dimensions | 4.02 x 3.78 x 1.69 inches |
| Specification Met | UL |
| Temperature Rating | 2500 degree fahrenheit |
| Terminal | Screw Terminal |
| UPC | 663274968133 |

## Product Details

- **Color:** red
- **Connector Type:** Screw
- **Contact Material:** Copper
- **Insulation Material:** resin
- **Terminal:** Screw Terminal

## Images

![LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) - Image 1](https://m.media-amazon.com/images/I/41-b6tuOWYL.jpg)
![LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) - Image 2](https://m.media-amazon.com/images/I/41VjSi2xY9L.jpg)
![LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) - Image 3](https://m.media-amazon.com/images/I/41m64Yp6hmL.jpg)
![LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) - Image 4](https://m.media-amazon.com/images/I/41qA5CMRJoL.jpg)
![LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red) - Image 5](https://m.media-amazon.com/images/I/41zTBBP1btL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Do they come in black?**
A: No, it's a red shell with a yellow inside

**Q: is it UL certified?**
A: Yes they are.  I used them in junction box for a ground bar.  Worked out well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Insulated electrical stand offs
*by R***N on September 4, 2025*

Worked great for mounting bus bars in an electric panel, good robust parts

### ⭐⭐⭐⭐ High Quality
*by O***N on May 22, 2025*

The resin body is very tough. I appreciate having complete dimensions, since i'm using them in a tight space. I do worry about the long-time corrosion-resistance of the 'chromate-like' plating on the screws; wish they were stainless steel.

### ⭐⭐⭐⭐⭐ Great
*by R***. on December 17, 2024*

Perfect for make a busbar

## Frequently Bought Together

- LBY 4pcs Busbar Insulator, SM-40 Polyester Standoff Insulators with Screw(M8), High-Strength Insulated Junction Post, Resin(Red)
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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-02*