How to Read Molex Micro-Fit Cable Assembly Part Numbers: A Simple Guide

For engineers and designers working with Molex Micro-Fit cable assemblies, understanding the part number coding system is crucial. These part numbers contain key information-such as connector type, circuit count, wire gauge, and special features-that facilitates the rapid selection of the appropriate cable assembly.

Drawing upon common series such as the 45132, 145132, 214750, and 214755, this article breaks down the logic behind Molex Micro-Fit cable assembly part numbers.

1. Why Are Part Numbers So Important?

In BOM management, procurement ordering, and inventory reconciliation, the part number serves as the sole basis for the precise and unique identification of a product.

For Molex's Micro-Fit cable assemblies, the part number not only identifies the product series but also encodes the following key information:

Structure Type: TPA or non-TPA
Number of Rows: Single-row or dual-row
Number of Circuits: Ranging from 2 to 10 circuits
Length: Standard lengths such as 150mm, 300mm, and 600mm
Plating Option: Tin or Gold

2. Analysis of Common Series Part Numbers

1. 45132 Series – Micro-Fit Dual-Row TPA Cable Assemblies

Structure: Dual-row, with TPA (Terminal Position Assurance)
Circuits: 4, 6, 8 circuits
Length: 150mm, 300mm, 600mm
Typical Applications: Servers, Power Supplies, Industrial Equipment

Part Number Example: 45132-0401

45132: Series Number, identifying it as a Micro-Fit Dual-Row TPA Cable Assembly
04: 4 circuits
01: Length Code (corresponds to 150mm)

2. 145132 Series – Micro-Fit Single-Row TPA Cable Assemblies

Configuration: Single-row, with TPA
Circuits: 2 to 7
Length: 150mm, 300mm, 600mm
Typical Applications: Space-constrained internal connections, home appliances, control modules

Part Number Example: 145132-0201

145132: Series Number (Identifies as Micro-Fit Single-Row TPA Cable Assembly)
02: 2 Circuits
01: Length Code (Corresponds to 150mm)

3. 214750 Series – Micro-Fit Dual-Row Non-TPA Cable Assemblies

Structure: Dual-Row, Non-TPA
Circuits: 2, 4, 6, 8, 10 Circuits
Length: 150mm, 300mm, 600mm
Plating Options: Tin or Gold
Typical Applications: Consumer Electronics, Office Equipment, Home Appliances

Part Number Example: 214750-0201

214750: Series Number (Identifies as Micro-Fit Dual-Row Non-TPA Cable Assembly)
02: 2 Circuits
01: Length Code (Corresponds to 150mm)

4. 214755–214758 Series – Micro-Fit Dual-Row Non-TPA Cable Assemblies (Extended Series)

Configuration: Dual-Row, Non-TPA
Circuits: 2 to 10
Plating Options: Tin or Gold
Features: Offers additional plating and length combinations

Series Number	Circuit Range	Description
214755	2–10	Gold plating version
214756	2–10	Tin plating version
214757	2–10	Other plating combinations
214758	2–10	Other plating combinations

3. Interpretation of Length Codes in Part Numbers

Molex Micro-Fit cable assemblies utilize standard length codes; the common corresponding relationships are as follows:

Length Code	Actual Length
01	150.00mm
02	300.00mm
03	600.00mm

4. Plating Options: How to Distinguish Between Tin and Gold?

Plating directly impacts contact resistance, corrosion resistance, and suitability for specific operating environments.
In Micro-Fit cable assemblies, plating specifications are typically distinguished via the series number or a suffix appended to the part number:

Tin Plating: Suitable for general environments; offers a lower cost option.
Gold Plating: Suitable for applications requiring high reliability, low-voltage operation, or use in harsh environments.

Taking the 214750 Series as an example, different plating versions correspond to distinct sub-series numbers.
If Gold plating is required, you may select the corresponding series-such as the 214755 Series-to meet your needs.

5. Quick Selection Reference

Series	Structure	TPA	Circuits	Temperature	Plating
45132	Dual Row	Yes	4, 6, 8	105°C	Tin/Gold
145132	Single Row	Yes	2–7	105°C	Tin/Gold
214750	Dual Row	No	2–10	80°C	Tin
214755	Dual Row	No	2–10	80°C	Gold

About Us

Premier Cable is a professional manufacturer of industrial cable assemblies and wiring harnesses, specializing in Micro-Fit, Nano-Fit, Mini-Fit, and Mega-Fit compatible solutions. We support both standard and custom designs, including angled cable assemblies (Up / Down / Left / Right / 45°) and injection molded connectors for enhanced durability.

With stable production and engineering support, we help industrial power supply manufacturers achieve reliable connections, optimized layouts, and efficient sourcing.