MPN

Recom Switching Regulator, Through Hole, 3.3V dc Output Voltage, 4.75 → 32V dc Input Voltage, 2A Output Current,

RS Stock No.:: 139-2950
Mfr. Part No.:: R-78B3.3-2.0
Brand:: Recom

Recom Switching Regulator, Through Hole, 3.3V dc Output Voltage, 4.75 → 32V dc Input Voltage, 2A Output Current,

Bulk discount available

Subtotal (1 unit)*

£10.26

(exc. VAT)

£12.31

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

6 unit(s) ready to ship
Plus 11 unit(s) ready to ship from another location
Plus 42 unit(s) shipping from 09 September 2025

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Units	Per unit
1 - 4	£10.26
5 - 9	£9.96
10 - 24	£9.64
25 - 49	£9.34
50 +	£9.03

*price indicative

RS Stock No.:: 139-2950
Mfr. Part No.:: R-78B3.3-2.0
Brand:: Recom

R78Bxx 2.0 Series Switching Regulator

The Recom R-78Bxx series are highly efficient, non-isolated switching regulators. They offer a high-quality product at a low cost in production quantity. They are ideally suited to replace 78xx linear regulators, as well as being pin compatible.

The convertor has a high-voltage input range and there is no need for heat sinks, due to little energy being wasted. It has a wide input range with continuous short circuit protection and no external components are needed to work efficiently.

Features and Benefits

• Wide operating temperature of -40 to +70 °C at full load
• Pin compatible with TO220 linear regulators
• High efficiency, non-isolated, no need for heatsinks
• Requires no external components
• Continuous short circuit protection
• Low ripple and noise
• Compact size, ensuring space saving
• Positive to negative converter

RECOM Switching Regulator, Vibration-Resistant, 6.6W Power Rating - R-78B-2.0 Series - R-78B3.3-2.0

If your circuit's receiving excess current, take it down a notch with this switching regulator from RECOM. The unit steps down a wide input voltage range between 4.75 and 32V DC to a safe output level of 3.3V DC. Need to mount it? The soldering pins mean you can attach it to the underside of your board in a flash. Thanks to its built-in resistance to vibration, you can count on this unit to hold firm when things get shaky.

Features & Benefits

• Pin-compatible with TO220 linear regulators for use with legacy devices
• Built-in short-circuit and over-temperature protection for durability in harsh conditions
• Low ripple and noise of 50mV Pk-Pk for minimal signal disruption
• Efficiency rating of 92% reduces heat waste, eliminating the need for a heatsink

Applications

• HVAC systems
• Digital cameras
• Computer peripherals
• Telecommunications

How fast is this regulator?

With a startup time of 10ms, you can rest assured that this regulator will quickly rise to the challenge of balancing power in your circuit.

How long will this regulator last?

Thanks to its mean time between failures of 6,349,000 hours, you can rely on this regulator for a long time without it breaking down.

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Recom
	Output Voltage	3.3V dc
	Output Current	2A
	Input Voltage	4.75 → 32V dc
	Mounting Type	Through Hole
	Number of Outputs	1
	Package	SIP 3
	Power Rating	6.6W
	Efficiency	92%
	Ripple And Noise	50mV Pk-Pk
	Maximum Temperature	+70°C
	Minimum Temperature	-40°C
	Series	R-78B-2.0
	Line Regulation	±0.5%
	Depth	8.5mm
	Width	8.5mm
	Maximum Input Current	50mA
	Protection Features	Short Circuit Protection
	Switching Frequency Range	460kHz
	Weight	4g
	MTBF	6349000h
	Power Signal Conversion Type	DC-DC
	Standards Met	CB Report, EN 55022, IEC/EN 62368-1
	Load Regulation	±1%
	Length	11.5mm

	Select all
	Brand Recom
	Output Voltage 3.3V dc
	Output Current 2A
	Input Voltage 4.75 → 32V dc
	Mounting Type Through Hole
	Number of Outputs 1
	Package SIP 3
	Power Rating 6.6W
	Efficiency 92%
	Ripple And Noise 50mV Pk-Pk
	Maximum Temperature +70°C
	Minimum Temperature -40°C
	Series R-78B-2.0
	Line Regulation ±0.5%
	Depth 8.5mm
	Width 8.5mm
	Maximum Input Current 50mA
	Protection Features Short Circuit Protection
	Switching Frequency Range 460kHz
	Weight 4g
	MTBF 6349000h
	Power Signal Conversion Type DC-DC
	Standards Met CB Report, EN 55022, IEC/EN 62368-1
	Load Regulation ±1%
	Length 11.5mm

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