24V ac 1 Output Through Hole PCB Transformer, 2.8VA

  • RS Stock No. 732-0395
  • Mfr. Part No. VB 2,8/1/24
  • Brand Block
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
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

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 24V ac
Power Rating 2.8VA
Primary Voltage Rating 230V ac
Number of Outputs 1
Length 32.3mm
Width 27.3mm
Depth 34mm
Dimensions 32.3 x 27.3 x 34mm
Weight 140g
Mounting Type Through Hole
Maximum Temperature +70°C
Minimum Operating Frequency 50Hz
Maximum Operating Frequency 60Hz
45 In stock for FREE next working day delivery
Price Each
£ 5.59
(exc. VAT)
£ 6.71
(inc. VAT)
Units
Per unit
1 - 9
£5.59
10 - 24
£5.38
25 - 49
£4.94
50 +
£4.51
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