Recom Switching Regulator, Surface, 3.3 V dc Output Voltage, 500 mA Output Current, 1 Outputs

RS Stock No.:: 706-3938
Mfr. Part No.:: R-78AA3.3-0.5SMD
Brand:: Recom

Recom Switching Regulator, Surface, 3.3 V dc Output Voltage, 500 mA Output Current, 1 Outputs

Bulk discount available

Subtotal (1 unit)*

£7.47

(exc. VAT)

£8.96

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

Plus 5 unit(s) shipping from 16 March 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 - 4	£7.47
5 - 9	£7.25
10 - 24	£7.01
25 - 49	£6.79
50 +	£6.57

*price indicative

RS Stock No.:: 706-3938
Mfr. Part No.:: R-78AA3.3-0.5SMD
Brand:: Recom

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Recom
	Product Type	Switching Regulator
	Output Voltage 1	3.3 V dc
	Output Current	500mA
	Mount Type	Surface
	Number of Outputs	1
	Power	1.65W
	Efficiency	91%
	Ripple and Noise	30mV Pk-Pk
	Maximum Operating Temperature	85°C
	Minimum Operating Temperature	-40°C
	Series	R-78AA-0.5
	Package Type	DIP
	Line Regulation	±0.4 %
	Length	15.3mm
	Width	8.8 mm
	Standards/Approvals	RoHS
	Weight	2.7g
	Depth	8.8mm
	Maximum Input Voltage	32V dc
	Minimum Input Voltage	4.75V
	MTBF	29253000h
	Load Regulation	±1 %

	Select all
	Brand Recom
	Product Type Switching Regulator
	Output Voltage 1 3.3 V dc
	Output Current 500mA
	Mount Type Surface
	Number of Outputs 1
	Power 1.65W
	Efficiency 91%
	Ripple and Noise 30mV Pk-Pk
	Maximum Operating Temperature 85°C
	Minimum Operating Temperature -40°C
	Series R-78AA-0.5
	Package Type DIP
	Line Regulation ±0.4 %
	Length 15.3mm
	Width 8.8 mm
	Standards/Approvals RoHS
	Weight 2.7g
	Depth 8.8mm
	Maximum Input Voltage 32V dc
	Minimum Input Voltage 4.75V
	MTBF 29253000h
	Load Regulation ±1 %

Datasheet

COO (Country of Origin):: TW

RECOM Switching Regulator, Surface Mounting, Adjustable Output - R-78AA-0.5 Series - R-78AA3.3-0.5SMD

A calm port in a Storm – that's what you GET with this switching regulator from RECOM. It stabilises varying voltage inputs ranging from 4.75 to 32V DC to give you a steady 3.3V DC output that's safe for low-voltage components like LED lamps. As an added advantage, you can adjust the output between 3 and 5.5V to suit your system's needs. The unit comes with integrated ON/OFF controls, so you can keep a secure handle on its operation.

Features & Benefits

• Non-conductive plastic housing for impact resistance and prevention of electric shocks

• Continuous short-circuit protection with automatic recovery to ensure safe operation

• Broad operating temperature range between -40°C and +85°C for use in challenging settings

• Low ripple and noise rating of 30mV for smooth signal transmission

Applications

• Medical equipment

• Research laboratories

• Automotive manufacture

How do I mount this switching regulator?

For ease, you can surface-mount this regulator directly onto your equipment via vapour phase soldering.

How efficient is this switching regulator?

This device offers up to 91% efficiency, which means it loses next to nothing in heat, saving you the bother of installing a heatsink.

R78AAxx-0.5SMD Series

Replacement for R-78Axx-0.5SMD series

Non-isolated

High efficiency up to 97%

Adjustable output voltage

Wide input voltage range

Thermal shutdown and continuous short circuit protection

Remote On/Off control

UL94V-0 package material

SMD 10 pin package

Note

Derate output when operating temperature above +71°C.
MTBF to MIL-HDBK 217F (+25°C).
Stk numbers 706-3922 and 706-3957 have fixed output voltages.

Standards

EN-60950-1