18V ac 1 Output Through Hole PCB Transformer, 3.2VA

  • RS Stock No. 732-0405
  • Mfr. Part No. VB 3,2/1/18
  • Manufacturer Block
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): DE
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 (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
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  

Standards

EN 61558

Approvals

ENEC 10; UL recognised component

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Approvals

VDE; UL

Standards

EN 61558

Specifications
Attribute Value
Secondary Voltage Rating 18V ac
Power Rating 3.2VA
Primary Voltage Rating 230V ac
Number of Outputs 1
Length 41mm
Width 35mm
Depth 30.8mm
Dimensions 41 x 35 x 30.8mm
Weight 170g
Mounting Type Through Hole
Maximum Temperature +70°C
Minimum Operating Frequency 50Hz
Maximum Operating Frequency 60Hz
20 In stock for delivery within 5 working day(s)
Price (ex. GST) Each
$ 7.68
(exc. GST)
$ 8.45
(inc. GST)
units
Per unit
1 - 9
$7.68
10 - 24
$7.53
25 - 49
$7.20
50 - 99
$6.92
100 +
$6.75
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