PT 4.5/2/9

PCB Transformer, EI 42 x 14.8, Encapsulated Safety Isolating, 230V, 2 x 9V, 4.5 VA, 50Hz / 60Hz

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Manufacturer: BLOCK
Product type: PCB Transformers
Power Rating:4.5VA; Secondary Voltages:2 x 9V; Current Rating:250mA; Isolation Transformer Primary Voltages:1 x 230V; Plug Type:-; Product Range:PT Series; SVHC:No SVHC (12-Jan-2017); AC Powe
SVHC: No SVHC (21-Jan-2025)
Power Rating: 4.5VA
Winding Type: Single Primary, Dual Secondary
Product Range: PT Series
Current Rating: 250mA
Frequency Range: 50Hz / 60Hz
Primary Voltages: 230V
Isolation Voltage: -
Secondary Voltages: 2 x 9V
PCB Transformer Type: Encapsulated Safety Isolating
Transformer Mounting: Through Hole

Delivery and price
Units per pack	250
Price	11.34 €
Current stock	10+
Lead time	30 days

Datasheet

Safety isolating transformer **PT 4,5/2/9** 

## Advantages 

Minimum size at high output 

Integrated overload protection using PTC in the input Also with dual output voltage for series or parallel connection 

Permanent corrosion protection, high insulation value and maximum electrical reliability thanks to XtraDenseFill resin encapsulation Self-extinguishing potting material 

Space saving installation thanks to additional screw mounting in the base plate 

## Applications 

As a mains transformer for adjustment of the voltage and simple electrical isolation. 

Safety transformer for the safe electrical isolation of the input and output sides. The transformer is suitable for creating SELV and PELV circuits because of the limit on the output voltage. 

## Sample application 

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Picture shows PT 7,5/1/15<br>**----- End of picture text -----**<br>


## Standards Z 

Safety isolating transformer 

## Approvals W 1 w Z 

VDE, UL 5085-1/-2, CSA 22.2 No.66 

to: VDE 0570 Part 2-6, DIN EN 61558-2-6, EN 61558-2-6, IEC 61558-2-6 

Safety isolating transformer **PT 4,5/2/9** 

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|||||||||
|---|---|---|---|---|---|---|---|
|Type|PT 4,5/2/9|Type|PT 4,5/2/9|
|Input|Terminal and mounting|
|Rated input voltage|230 Vac|Terminals|Pins for PCB|
|Rated frequency|50 - 60 Hz|Measures and weights|
|xe)@oO||——SsS—COsSsSCSCtsssssSSSsS—<—s—S|OutRated output voltageput|2 x 9 Vac|xe)PF?|)|A|Pin (ø)Core type|0.8 mmEI 42/14,8|
|8|Rated PowerNo-load voltage (app. x factor)|4.5 VA1.32|§|Weight|0.19 kg|
|8|No-load loss (typ.)|1.50 W|28.0|
|oO|Efficiency|65.0 %|55|
|Standards|25.0|
|2.5|
|~|Classification|Safety isolating transformer|>|=|
|—_—____—\||©)|=|io)|
|a|AApprovalspprovals|cURus, VDE|25.035.0|5.015.0|44.0|
|Environment|=||,|TT6p|33.0|
|Ambient temperature max.|40 °C|©|©|5.0|
|Safety and protection|37.0|
|Type|Encapsulated|
|Insulation class|VDE=E, UL=class 105|
|Protection index|IP 00|
|Safety class (prepared)|II|
|Short circuit strength|non-inherently short-circuit proof|
|Order numbers|
|Order Number|PT 4,5/2/9|

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Updated at April 27, 2026

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