---
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: "12681 Ft"
currency: HUF
in_stock: true
reviews_count: 11
category: "Lby"
url: https://www.desertcart.hu/products/424761086-lby-4pcs-busbar-insulator-sm-40-polyester-standoff-insulators-screw
store_origin: HU
region: Hungary
---

# 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:** 12681 Ft
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your electrical setup with precision and power!

## 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?** 12681 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/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

- • **Robust Resin Build:** Durable polyester resin ensures long-lasting insulation and mechanical strength.
- • **Compact & Versatile Design:** 40mm height fits tight spaces, ideal for both high and low power distribution cabinets.
- • **Precision M8 Screw Fastening:** Secure your busbars with high-strength copper screws designed for tight, reliable connections.
- • **Superior Electrical Insulation:** Insulation resistance over 1000MΩ minimizes leakage current for safer power distribution.
- • **High Voltage & Pulse Resistance:** Rated for 600V operating voltage and 5000V pulse voltage to handle demanding electrical environments.

## Overview

The LBY 4pcs SM-40 Busbar Insulator set features high-strength polyester resin standoff insulators with M8 copper screws, engineered for secure, insulated connections in power distribution cabinets. Rated for 600V and pulse voltages up to 5000V, these compact 40mm insulators offer exceptional heat resistance (up to 2500°F), superior electrical insulation (>1000MΩ), and robust mechanical strength, making them a reliable choice for professional-grade 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 Hungary*
*Store origin: HU*
*Last updated: 2026-02-13*