Hirose FX30B Series 3.81mm Pitch 4 Way 1 Row Straight PCB Socket, Through Hole, Solder Termination

  • RS Stock No. 843-1121
  • Mfr. Part No. FX30B-4S-3.81DSA
  • Manufacturer Hirose
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): JP
Product Details

Hirose FunctionMAX FX30B 3.81 mm Board to Board Connectors

FunctionMAX FX30B 3.81 mm board to board connectors with a unique floating structure that absorbs mounting misalignment errors in applications where multiple stacking connectors are used. The contacts of are designed to offer a degree of play during mating of +0.3 mm in the XY directions and 1 mm in the Z direction. The floating contacts self-centre in both the X & Y direction and absorb misalignment errors ensuring safe and accurate mating. This floating feature also eliminates stress caused by mounting placement errors preventing solder cracking and the need for corrective rework. Large mating guides on either side of the FX30B header engage with the ribs on the receptacle for a secure connection. These moulded guide posts also allow for an alignment movement of ±1.3 mm in the XY directions making mating easier and preventing incorrect insertion. An extra six keys around the mating face of these FX20 connectors also help to prevent reverse insertion. Metal fittings are featured either side of these FX30B connectors for robust, secure fixing to the PCB. These metal fittings also provide resistance against deformation in up, down, left and right directions. The contacts of these FX30B connectors have a high current capacity of 13-17A per pin. The FX20 receptacle connectors contain gold plated contacts and have a multi-point structure with four independent points of contact for increased contact reliability. These FX30B board to board connectors have a two-step contact timing sequence that results in a low insertion/extraction force.

Features and Benefits

• Floating structure to absorb mounting misalignment
• Self-aligning and self-guiding structure
• Robust metal fittings for secure attachment to PCB
• Multi-point contact structure for increased electrical reliability
• 13 to 17A current capacity per contact
• Effective mating length of 2 mm for high contact reliability
• Low insertion/Extraction force


• Broadcast equipment
• Base Station Transceivers
• Industrial equipment
• Measuring instrumentation
• Medical devices
• Projectors

The FunctionMAX Brand

FunctionMAX board to board connectors are designed to meet the needs of advancing technologies within the industrial market and offer high performance and maximum functionality. The FunctionMAX range includes connectors with a floating design and connectors with a high-speed transmission rate. The high transmission connectors have a design based on a differential transmission system and offer high-speed signals and excellent resistance to noise. The FunctionMAX range of board to board connectors offer superior performance in diverse environments.

Hirose FX30B 3.81mm Board to Board Power Connectors

Attribute Value
Number of Contacts 4
Number of Rows 1
Pitch 3.81mm
Type Board to Board
Mounting Type Through Hole
Body Orientation Straight
Termination Method Solder
Current Rating 10A
Voltage Rating 250 V ac/dc
Series FX30B
Contact Material Copper Alloy
522 In stock for delivery within 5 working day(s) (Global Stock)
Price (ex. GST) Each
$ 8.62
(exc. GST)
$ 9.48
(inc. GST)
Per unit
1 - 19
20 - 74
75 - 299
300 - 599
600 +
Packaging Options:
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