Manufactured by Molex, this Built-in SIL socket features a standard design with 12 pins and a contact spacing of 4.2 mm. The part is typically used in electronic and electrical connections where secure and reliable socket interfaces are needed. Common applications include consumer electronics and industrial equipment where compact and efficient connection solutions are required.
| Type |
Built-in SIL socket (standard) |
| Number of Positions |
12 |
| Pitch |
4.2mm |
| Number of Rows |
2 |
| Application |
Power, Wire-to-Board |
| Base unit of measure |
PC |
| Base unit of measure desc |
piece |
| Board contact surface |
Tin |
| Breakaway |
No |
| Case Material |
Nylon (NL) |
| China ro h s status |
Compliant per SJ/T 11365-2006 |
| Circuits loaded |
12 |
| Circuits maximum |
12 |
| Coating thickness (PCB side) |
0.889µm |
| Color resin |
Natural |
| Colour |
Ecru |
| Comments |
The 5566 header should be used with standard Mini-Fit female terminals. If increased amperage of up to 13A per circuit is needed, please consider using the Mini-Fit Plus HCS family 45750 terminals with 46015 headers; See Molex Product specification PS-5666-001 for current de-rating information. |
| Component type |
PCB Header |
| Connection |
Soldering |
| Connector coating thickness |
0.889µm |
| Contact Plating |
Tin |
| Cross Section |
4.2mm |
| Csa |
LR19980 |
| Current maximum per contact |
9.0A |
| Design registration eligibility |
false |
| Durability mating cycles max |
30 |
| Duration at max process temperature seconds |
5 |
| ELV status |
Not Relevant |
| Engineering number |
5566-12A |
| Engineering Part No |
5566-12A |
| Engineering Series Name |
MINIFIT JR HDR VERT |
| Engineering Series No |
05566 |
| First mate last break |
No |
| First published date |
2007-06-08 |
| Flammability |
94V-2 |
| G a d s l/ i m d s |
Compliant with Exemption 44 |
| Glow wire capable |
No |
| Guide to mating part |
No |
| H f l h status |
Low-Halogen per IEC 61249-2-21 |
| Keying to mating part |
No |
| Lead free process capability |
WAVE |
| Lock to mating part |
Yes |
| Material metal |
Brass |
| Material plating mating |
Tin |
| Material plating termination |
Tin |
| Material resin |
Nylon |
| Material type |
Finished Goods |
| Max cycles at max process temperature |
1 |
| Maximum Temperature |
+105°C |
| Min. temperature |
-40°C |
| Net weight |
3.224/g |
| Nominal Current |
9A |
| Nominal Voltage |
600V |
| Orientation |
Perpendicular (to the PCB) |
| Packaging Type |
Bag |
| Pc tail length |
3.50mm |
| Pcb locator |
Yes |
| Pcb retention |
No |
| Pcb thickness recommended |
1.60mm |
| Pitch mating interface |
4.20mm |
| Pitch termination interface |
4.20mm |
| Plating min mating |
0.889µm |
| Plating min termination |
0.889µm |
| Polarized to mating part |
Yes |
| Polarized to pcb |
Yes |
| Primary pack qty |
225 |
| Process temperature max c |
240 |
| Product name |
Mini-Fit Jr. |
| Product number display |
39281123 |
| Product number hyphen |
39-28-1123 |
| Product number sap |
0039281123 |
| Reach status |
Not Contained per D(2025)7771-DC (04 Feb 2026) |
| Reference series |
5566 |
| Ro h s status |
Compliant per EU 2015/863 |
| Sampleable |
True |
| Shrouded |
Fully |
| Stackable |
No |
| Taxonomy |
PCB Headers and Receptacles |
| Temperature range operating |
-40° to +105°C |
| Termination interface style |
Through Hole |
| Ul |
E29179 |
| Upc |
800753581616 |
| Voltage maximum |
600V |
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