---
product_id: 303302457
title: "Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip"
brand: "maypole"
price: "$4"
currency: NZD
in_stock: false
url: https://www.desertcart.nz/products/303302457-maypole-3877-7-way-by-pass-relay-buzzer-and-smart
store_origin: NZ
region: New Zealand
---

# 16.4W power efficiency 7p7t multi-contact precision Screw mount for secure fit Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip

**Brand:** maypole
**Price:** $4
**Availability:** ❌ Out of Stock

## Summary

> 🔔 Elevate your vehicle’s wiring game with smart, seamless control!

## Quick Answers

- **What is this?** Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip by maypole
- **How much does it cost?** $4 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/303302457-maypole-3877-7-way-by-pass-relay-buzzer-and-smart)

## Best For

- maypole enthusiasts

## Why This Product

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

## Key Features

- • **Secure Installation:** Screw mount design guarantees a stable, vibration-resistant fit
- • **Lightweight & Compact:** At just 140g and 18x15.8x3 cm, fits seamlessly into any setup
- • **Precision Engineering:** 7p7t brass contacts ensure flawless electrical connectivity
- • **Smart Chip Integration:** Advanced circuitry for automatic lift control and enhanced durability
- • **Power-Packed Performance:** Delivers a reliable 16.4 watts for consistent operation

## Overview

The Maypole 3877 7-Way By-Pass Relay Buzzer features precision brass contacts and a smart chip for automatic lift control. Its screw mount design ensures secure installation, while its compact, lightweight build (140g, 18x15.8x3 cm) and 16.4-watt power rating deliver reliable, efficient performance for professional-grade vehicle electrical systems.

## Description

Product Description          So you have a trailer to tow, how do you connect it up to your vehicles electrics? Whether you need to tow for work or pleasure you will need to make your trailer safe and legal before you hit the road and Maypole has the answer with its range of towing leads and adaptors. This 7 Way By-pass Relay from Maypole is designed for use with electrical systems on caravans and trailers. It is an audible smart chip relay that runs on 12v electrics. Easy to use and fit this relay comes with full detailed instructions and is fully E approved. Maypole are the UK's leading manufacturer of high quality towing, trailer and related leisure products. Based in Birmingham with over 40 years of experience, they are a trusted and well-known brand for their products. With over 2000 lines currently, Maypole is using their knowledge and expertise in making new and innovative products and solutions which are helping their customers. From electrical cabling, to electrical winches, and even ice scrapper, Maypole has tried to cater for the Travel and leisure markets in the UK.             Set Contains:          1 x Bypass Relay

## Features

- Contact material: Brass
- Contact type: 7p7t
- Mounting type: Screw Mount
- 7-Way

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Maypole Limited |
| Brand | Maypole |
| Model | 3877 |
| Product Dimensions | 18 x 15.8 x 3 cm; 140 g |
| Item model number | 3877 |
| Manufacturer Part Number | 3877 |
| OEM Part Number | 3877 |
| Lift Type | Automatic |
| Wattage | 16.4 watts |
| Item Weight | 140 g |

## Product Details

- **Connector type:** Through Hole
- **Contact material:** Brass
- **Contact type:** 7p7t
- **Current rating:** 15 Amps
- **Mounting type:** Screw Mount

## Images

![Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip - Image 1](https://m.media-amazon.com/images/I/614z5+2QwfL.jpg)
![Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip - Image 2](https://m.media-amazon.com/images/I/51qUP7vlj-L.jpg)
![Maypole 3877 7-Way By-Pass Relay Buzzer and Smart Chip - Image 3](https://m.media-amazon.com/images/I/91PdT5dnp3L.jpg)

## Frequently Bought Together

- Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics in Display Packaging, Black
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- Beduan 2 Way Normally Closed DC 12V Electric Solenoid Air Valve 1/8" NPT

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**Shop now:** [https://www.desertcart.nz/products/303302457-maypole-3877-7-way-by-pass-relay-buzzer-and-smart](https://www.desertcart.nz/products/303302457-maypole-3877-7-way-by-pass-relay-buzzer-and-smart)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-26*