• RS Stock No. 732-0370
  • Brand Block
  • Mfr. Part No. VB 2,8/1/9
Block
9V ac 1 Output Through Hole PCB Transformer, 2.8VA
Product Details

Transformers PCB Mount, Short Circuit Proof, VB & PT Series

230Va.c. 50 to 60Hz primary
Single or twin secondary windings for series or parallel connection (For conformance reasons,0.35 to 3.2VA transformers with 2 x 15 and 2 x 18V outputs and all transformers with 2x 24V outputs should not have their secondaries connected in series as this means they will not meet the VDE 0550 approval)
VB series (0.35 - 3.2VA) are inherently short circuit proof
PT series (4.5 - 22VA) are protected by internal PTC device
Compact design
Vacuum epoxy resin moulded to UL94-V0 rating
Double section glass fibre reinforced polyamide bobbins
100% electrical and flash tested
High efficiency and low temperature rise
Low inter-winding capacitance
Low radiated noise
Extra fixing holes for secure boarding mounting on 4.5VA and above

Selection Guide (Dual secondary)
VA Rating Fixing centres (mm)   Pin configuration (mm)        
  C1 C2 P1 S1 S2 A Pin Size
0.35 - - 15 5 5 15 0.6 Ø
0.5 - - 15 5 5 15 0.6 Ø
1.0 - - 20 10 5 20 0.8 Ø
1.5 - - 20 10 5 20 0.8 Ø
2.3 - - 20 10 5 20 0.8 Ø
3.2 - - 20 10 5 25 0.8 Ø
4.5 35 28 25 15 5 25 0.8 Ø
7.5 40 32 25 15 5 27.5 0.8 Ø
13 47.5 37.5 30 20 5 30 0.8 Ø
22 52.5 40 30 10 10 32.5 0.8 Ø
Isolation
  Primary to Secondary 5kV
Secondary to Secondary 250V
Protection   Class 2
Insulation:
VB Series
PT Series
Class B (130°C) Class A (105°C)
Class E (120°C) Class A (105°C)
Fixing: mechanical fixings can be supplemented on the 4.5 to 22VA transformers by 4 self tapping crews (No-4 x 9.5mm max) using holes mounted in the corners of the case.    
Max Ambient Temperature 0.35 to 2.3VA +70°C, 3.2VA +50°C, 4.5 to 22VA +40°C  
Selection Guide (Single secondary)
VA Rating Pin configuration (mm)      
  P1 S1 A Pin Size
0.35 15 5 15 0.6 Ø
0.5 15 5 15 0.6 Ø
1.0 20 10 20 0.6 Ø
1.2 20 10 20 0.8 Ø
1.5 20 10 20 0.8 Ø
2.0 20 10 20 0.8 Ø
2.8 20 10 20 0.8 Ø
3.2 20 10 25 0.8 Ø

Approvals

ENEC 10; UL recognised component

Standards

EN 61558

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Approvals

VDE; UL

Standards

EN 61558

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Specifications
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Secondary Voltage Rating9V ac
Power Rating2.8VA
Primary Voltage Rating230V ac
Number of Outputs1
Length32.3mm
Width27.3mm
Depth34mm
Dimensions32.3 x 27.3 x 34mm
Weight140g
Mounting TypeThrough Hole
Maximum Temperature+70°C
Minimum Operating Frequency50Hz
Maximum Operating Frequency60Hz
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Technical Reference
  • RS Components

    Statement of conformity


    The product detailed below complies with the specifications published by RS Components. Where applicable it provides assurance that electrostatic discharge sensitive devices have been handled and packed under conditions that meet the administrative and technical requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards.
    RS Stock No. 732-0370
    Description 9V ac 1 Output Through Hole PCB Transformer, 2.8VA
    Manufacturer/Brand: Block
    Mfr. Part No. VB 2,8/1/9
    The foregoing information relates to product sold on, or after, the date shown below.
    RS COMPONENTS
    Date Nov 24, 2017
    RS Components Ltd, Birchington Road, Corby, Northamptonshire, NN17 9RS, UK
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