Molex connectors are a trusted name in electronics, known for their durability and adaptability across countless applications. Whether you’re working on a space-constrained device or a high-power system, Molex has a connector to fit the bill. In this post, we’ll explore some of the most widely used Molex connector types, focusing on wire-to-board and wire-to-wire categories. To help you find the right fit, we’ve sorted them by pitch size—from smallest to largest—making it easy to compare options and choose what works for your project.
What’s pitch size? It’s the distance between the centers of adjacent pins in a connector. Smaller pitches are perfect for compact designs, while larger ones handle higher currents and voltages. This guide breaks down each series with key details: pitch, category, wire size (AWG), pin numbers, maximum current and voltage, and common applications. Let’s dive in!
Molex Connector Series by Pitch Size
- Pitch: 1.25mm
- Category: Wire-to-Board, Wire-to-Wire
- Wire Size (AWG): 32 to 26
- Pin Numbers: 2 to 15 circuits (single row)
- Current (Max): Up to 2.5 A (for 2-circuit, 26 AWG)
- Voltage (Max): 125 V
- Alternative: 1251
PicoBlade connectors offer high-performance wire-to-board and wire-to-wire solutions with tin and gold-plated options, ensuring flexibility, reliability, and durability for diverse applications and industries.
- Pitch: 1.27mm
- Category: Wire-to-Board
- Wire Size (AWG): 28 to 26
- Pin Numbers: 4 to 26
- Current (Max): 1.2 A
- Voltage (Max): 250V
- Alternative: 2550
The Molex 1.27mm Picoflex IDT Connector System is a compact, versatile solution for high-density ribbon cable applications, offering reliable power and signal connections. It features a secure terminal design with locking and strain relief, ideal for high-vibration and shock-heavy environments.
Pico-SPOX
- Pitch: 1.50mm
- Category: Wire-to-Board
- Wire Size (AWG): 30 to 24
- Pin Numbers: 2 to 15 (single row)
- Current (Max): 2.5 A
- Voltage (Max): 250 V
- Alternative: 1503
The Molex Pico-SPOX Wire-to-Board Connector System is designed for higher-current, space-constrained applications, delivering up to 2.5 A in a compact 1.50mm pitch. It features a dual-point contact design for enhanced reliability, a friction lock for secure mating retention, and polarizing keys to prevent mismating. Ideal for tight packaging in consumer electronics, automotive, and industrial devices, this system ensures robust performance with easy assembly.
MicroBlade
- Pitch: 2.00mm
- Category: Wire-to-Board
- Wire Size (AWG): 30 to 24
- Pin Numbers: 2 to 15 (single row)
- Current (Max): 2.0 A
- Voltage (Max): 125 V
- Alternative: 2003
The Molex MicroBlade Connector System is a compact, cost-effective solution designed for reliable wire-to-board connections in space-constrained applications. Featuring a friction lock for secure mating and a box-style contact for enhanced durability, it’s well-suited for consumer electronics, industrial devices, and other environments requiring dependable performance.
Sherlock
- Pitch: 2.00mm
- Category: Wire-to-Board
- Wire Size (AWG): 30 to 24
- Pin Numbers: 2 to 20 (single row)
- Current (Max): 2.0 A
- Voltage (Max): 125 V
- Alternative: 2004
The Molex Sherlock Connector System is a cost-effective, reliable wire-to-board solution designed for applications requiring secure mating. It features a wide-latch area for easy operation, positive locking with an audible click, and a compact 2.00mm pitch, making it ideal for space-constrained designs in consumer electronics and industrial applications.
- Pitch: 2.00mm
- Category: Wire-to-Board
- Wire Size (AWG): 30 to 22
- Pin Numbers: 2 to 15 (single row)
- Current (Max): 3.0 A
- Voltage (Max): 125 V
- Alternative: 2009
The Molex DuraClik 2.00mm Pitch Wire-to-Board Connector System is engineered for high-vibration and high-temperature applications, delivering superior electrical contact reliability and space savings. Featuring an independent secondary lock (ISL) and a wide latch with an audible “click” for secure mating, it’s ideal for automotive (e.g., LED lighting, steering systems) and consumer white goods environments requiring robust performance up to 125°C.
- Pitch: 2.50mm
- Category: Wire-to-Board
- Wire Size (AWG): 28 to 22
- Pin Numbers: 2 to 15 (single row)
- Current (Max): 4.0 A
- Voltage (Max): 250 V
- Alternative: 2502
The Molex Mini-SPOX 2.50mm Wire-to-Board Connector System is designed for compact applications, delivering electrical and mechanical reliability in a high-temperature design. It features a friction lock for secure mating retention and polarizing features to ensure proper orientation, making it suitable for automotive, consumer, and industrial applications where space is limited and durability is key.
- Pitch: 2.54mm
- Category: Wire-to-Board, Wire-to-Wire
- Wire Size (AWG): 26 to 22
- Pin Numbers: 2 to 25 (single row)
- Current (Max): 3.0 A
- Voltage (Max): 250 V
- Alternative: 2544
The Molex SL (Stackable Linear) Modular Connector System is a versatile, high-performance solution designed for both wire-to-wire and wire-to-board applications. With a 2.54mm pitch, it offers a positive locking mechanism and terminal position assurance (TPA) to ensure secure mating and prevent terminal backout, making it ideal for high-vibration environments like automotive, consumer electronics, and industrial systems. Its modular design supports a variety of configurations, enhancing flexibility for custom assemblies.
- Pitch: 3.00mm
- Category: Wire-to-Board, Wire-to-Wire
- Wire Size (AWG): 30 to 18
- Pin Numbers: 2 to 24 (single-row and dual-row options)
- Current (Max): 10.5 A
- Voltage (Max): 600 V
- Alternative: 3001
The Molex Micro-Fit Connector System is a compact, high-density solution designed for power and signal applications requiring reliable connectivity in space-constrained environments. With a 3.00mm pitch, it delivers up to 10.5A of current, making it suitable for mid-range power needs. Featuring fully isolated terminals, positive locking, and options like blind-mate interfaces (BMI), it ensures secure mating and durability across industries such as consumer electronics, automotive, and industrial equipment.
- Pitch: 4.20mm
- Category: Wire-to-Board, Wire-to-Wire
- Wire Size (AWG): 28 to 14
- Pin Numbers: 2 to 24 (single-row and dual-row options)
- Current (Max): 13 A
- Voltage (Max): 600 V
- Alternative: 4201
The Molex Mini-Fit Connector System is a versatile, high-density power solution designed for both wire-to-board and wire-to-wire applications. It includes variants like Mini-Fit Jr., Mini-Fit Plus, and Mini-Fit TPA2, offering features such as polarized housings, positive locks, and fully isolated terminals. With a robust design that supports up to +125°C operating temperatures, it’s ideal for industries ranging from consumer electronics to industrial equipment, providing flexibility and reliability in mid-range power delivery.
- Pitch: 5.70mm
- Category: Wire-to-Wire, Wire-to-Board
- Wire Size (AWG): 16 to 12
- Pin Numbers: 2 to 12 (single-row and dual-row options)
- Current (Max): 30 A (per circuit)
- Voltage (Max): 600 V
- Alternative: 5701
The Molex Mega-Fit Connector System delivers exceptional power density, providing up to 30A per circuit in a compact 5.70mm pitch design. Engineered for both wire-to-wire and wire-to-board applications, it features fully isolated terminals, positive locking, and a split-box terminal design with six independent contact points for long-term reliability. Ideal for high-current applications in industries like automotive, industrial, and consumer electronics, Mega-Fit connectors also offer unique keying options to prevent mis-mating, ensuring secure and robust connections.