# Non Isolated POL DC/DC Converter, Compact, ITE, SIP, 18 W, 600 mV, 6 V, 3 A

![Product image](https://novapart.co/image/farnell:2080625/)

**URL**: https://novapart.co/products/TSR%203-1250/non-isolated-pol-dc-converter-compact-ite-sip-18-w
**SKU**: TSR 3-1250
**Manufacturer**: TRACO POWER
**Category**: Power & Line Protection || Power Supplies || DC / DC Converters || DC / DC Non Isolated Board Mount Converters - Adjustable Output
**Price**: €19.3800
**Stock**: 10+
**Lead Time**: 155 days (indicative)

## Description

Output Power Max:18W; Output Voltage Min:600mV; Output Voltage Max:6V; Output Current Max:3A; DC / DC Converter Output Type:Adjustable; DC / DC Converter Type:SIP; Input Voltage DC Min:4.5V; Input

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (14-Jun-2023) |
| Depth | 15.5mm |
| Width | 9.4mm |
| Height | 6mm |
| Product Range | TSR 3 Series |
| Output Power Max | 18W |
| Output Current Max | 3A |
| Output Voltage Max | 6V |
| Output Voltage Min | 600mV |
| Input Voltage Dc Max | 14V |
| Input Voltage Dc Min | 4.5V |
| Dc / Dc Converter Type | SIP |
| Power Supply Applications | ITE |
| Dc / Dc Converter Output Type | Adjustable |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2080625/)

**Non-Isolated DC/DC Converter (POL)** 

**TSR 3 Series, 3 A** 

- **High performance 3 Amp. switching regulator** 

- **Suitable for positive & negative output circuit** 

- **High efficiency up to 95 %** 

- **Adjustable output voltages** 

- **Wide input voltage ranges 2.5–5.5, 4.5–14 and 10–30 VDC** 

- **Short circuit protection** 

- **Remote On/Off input** 

- **Low output ripple & noise** 

- **3-year product warranty** 

The TSR 3 models are non isolated step down switching regulators. Since production May 2013 they can also be operated with negative output voltage. They come in a very compact open frame package of 15.5 x 9.4 x 6.2mm. The high efficiency of up to 95% admits a full load operation up to 50°C and up to 85°C with 50% current reduction. A low standby current, a very wider input range and no requirement for heatsink give these switching regulators a significant advantage over linear regulators. 

Togther with a remote On/Off input and protection against short circuit the TSR 3 Series models are ideal point of load regulators for high reliable and energy critical applications. 

## **Models** 

|**Order Code**|**Output Current**<br>**max.**|**Input Voltage**<br>**Range**|**Output Voltage**<br>**nom.**(adjustable)|**Efficiency**<br>**typ.**|
|---|---|---|---|---|
|**TSR 3-0533**|3'000 mA|2.5 - 5.5 VDC(5 VDC nom.)|0.6 VDC(0.6 - 3.3 VDC)|95 %(at 2.5 Vout)|
|**TSR 3-1250**||4.5 - 14 VDC(12 VDC nom.)|0.6 VDC(0.6 - 6.0 VDC)|93 %(at 3.3 Vout)|
|**TSR 3-2450**<br>**TSR 3-24150**||10 - 30 VDC(24 VDC nom.)|3 VDC(3.0 - 6.0 VDC)<br>5 VDC(5.0 - 15.0 VDC)|91 %(at 5.0 Vout)<br>95 %(at 12 Vout)|



## **Options** 

**Suffix A** - Optional models with angular pins (see outline dimensions) 

Note - TSR 3-1250: max. 9 Vin if Vout <0.9 VDC 

- For external circuit proposal for negative output voltage, refer to application note 

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**April 15, 2026** 

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**TSR 3 Series, 3 A** 

## **Input Specifications** 

|Input Current|- At no load|5 Vin models:|20 mA typ.|
|---|---|---|---|
|||12 Vin models:|25 mA typ.|
|||24 Vin models:|25 mA typ.(3 Vout model)|
||||30 mA typ.(5 Vout model)|
||||(at Vin nom.)|
||- At full load|5 Vin models:|3'000 mA max.|
|||12 Vin models:|2'600 mA max.|
|||24 Vin models:|2'200 mA max.(3 Vout model)|
||||3'000 mA max.(5 Vout model)|
||||(at Vin min.)|
|Reflected Ripple Current|||30 mAp-p typ.|
||||(24 Vin models: Ext. filter,see application note)|
|Recommended Input Fuse||5 Vin models:|5'000 mA(slow blow)|
|||12 Vin models:|5'000 mA(slow blow)|
|||24 Vin models:|5'000 mA(slow blow)|
||||(The need of an external fuse has to be assessed|
||||in the final application.)|
|Input Filter|||Internal Capacitor|
|**Output Specifications**||||
|Output Voltage Adjustment||0.6 Vout models:|0.6 - 3.3 VDC|
||||0.6 - 6.0 VDC|
|||3 Vout models:|3.0 - 6.0 VDC|
|||5 Vout models:|5.0 - 15.0 VDC|
||||(By external trim resistor)|
|||See application note:|www.tracopower.com/tsr3-adj|
||||(TSR 3-0533: Vin at least 0.5 V higher than Vout|
||||TSR 3-1250: Vin at least 2 V higher than Vout|
||||TSR 3-24150: Vin at least 3 V higher than Vout)|
|Voltage Set Accuracy|||±2% max.|
|Regulation|- Input Variation (Vmin - Vmax)||0.2% max.(Vout >2.5 VDC)|
||||5 mV typ.(Vout <2.5 VDC)|
||- Load Variation (10 - 90%)||0.8% max.(Vout >2.5 VDC)|
||||15 mV typ.(Vout <2.5 VDC)|
|Ripple and Noise||5 Vin models:|50 mVp-p typ.|
|(20 MHz Bandwidth)||12 Vin models:|50 mVp-p typ.|
|||3 Vout models:|75 mVp-p typ.|
|||5 Vout models:|150 mVp-ptyp.|
|Capacitive Load||0.6 Vout models:|1'000 µF max.|
|||3 Vout models:|1'000 µF max.|
|||5 Vout models:|500 µF max.|
||||(ESR >1 mOhm)|
|Minimum Load|||Not required|
|Temperature Coefficient|||±0.02 %/K max.|
|Start-upOvershoot Voltage|||1% max.|
|Short Circuit Protection|||Continuous,Automatic recovery|
|Output Current Limitation|||280% typ. of Iout max.(5 Vin models)|
||||220% typ. of Iout max.(other models)|
|Transient Response|- Peak Variation||250 mV typ. / 500 mV max.(50% Load Step)|
||||(5.0 Vout model)|
||||150 mV typ. / 250 mV max.(50% Load Step)|
||||(other models)|
||- Response Time||120µs typ. / 220µs max. (50% Load Step)|



All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated. 

**Page 2 / 5** 

**April 15, 2026** 

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**TSR 3 Series, 3 A** 

## **Safety Specifications** 

|Over Voltage Category|||Not mains connected|
|---|---|---|---|
|**General Specifications**||||
|Relative Humidity|||95% max. (non condensing)|
|Temperature Ranges|- Operating Temperature||–40°C to +85°C|
||- Storage Temperature||–55°C to +125°C|
|Power Derating|- High Temperature||Depending on model|
|||See application note:|www.tracopower.com/tsr3-cc|
|CoolingSystem|||Natural convection(20 LFM)|
|Remote Control|- Voltage Controlled Remote||On: 1 to 12 VDC or open circuit|
||(passive = on)||Off: 0 to 0.3 VDC or short circuit|
||||Refers to 'Remote' and 'GND' Pin|
||- Off Idle Input Current||1.5 mA typ.(0.6 Vout models)|
||||6 mA typ.(other models)|
||||(5 Vin model: 5.5 V or open circuit for On-state)|
|Regulator Topology|||Buck Converter|
|Switching Frequency|||540 - 660 kHz(PWM) (5 Vin & 12 Vin models)|
||||270 - 330 kHz(PWM) (24 Vin models)|
|Insulation System|||Non-isolated|
|Reliability|- Calculated MTBF||4'500'000 h(MIL-HDBK-217F, ground benign)|
|Washing Process|||According to Cleaning Guideline|
||||www.tracopower.com/info/cleaning.pdf|
|Environment|- Thermal Shock||MIL-STD-810F|
|Pin Material|||Copper|
|Pin Foundation Plating|||Nickel(3 - 5µm)|
|Pin Surface Plating|||Gold(50 - 75 nm),matte|
|HousingType|||Open Frame|
|MountingType|||PCB Mount|
|Connection Type|||THD(Through-Hole Device)|
|Footprint Type|||SIP5|
|Soldering Profile|||Lead-Free Wave Soldering|
||||260°C / 6 s max.|
|Weight||5 Vin models:|1.7 g|
|||12 Vin models:|1.7 g|
|||24 Vin models:|2.1g|



Environmental Compliance - REACH Declaration 

- RoHS Declaration 

- SCIP Reference Number 

www.tracopower.com/info/reach-declaration.pdf REACH SVHC list compliant REACH Annex XVII compliant www.tracopower.com/info/rohs-declaration.pdf Exemptions: 7(a), 7(c)-I (RoHS exemptions refer to the component concentration only, not to the overall concentration in the product (O5A rule).) 614d7af9-8fae-483c-ade9-b5194d2d7ab4 

## **Additional Information** 

Supporting Documents Frequently Asked Questions Glossary 

www.tracopower.com/overview/tsr3 www.tracopower.com/glossary-faq www.tracopower.com/info/glossary.pdf 

All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated. 

**Page 3 / 5** 

**April 15, 2026** 

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**TSR 3 Series, 3 A** 

## **Outline Dimensions** 

## **Standard version** 

**==> picture [269 x 228] intentionally omitted <==**

**----- Start of picture text -----**<br>
W 6.0<br>(0.24)<br>5 1 Square pins<br>0.64 x 0.64<br>(0.025 x 0.025)<br>4 x 1.70 3.7<br>(4 x 0.067) (0.15)<br>H<br>3.3 (0.13)<br>**----- End of picture text -----**<br>


|Pinout|Pinout|Pinout|
|---|---|---|
|Pin|positive|negative|
|1|Remote On/Off||
|2|+Vin (Vcc)||
|3|GND|–Vout|
|4|+Vout|GND|
|5|Trim||



TSR 3-0533 & TSR 3-1250:   W=9.4 (0.37) H=15.5 (0.61) TSR 3-2450 & TSR 3-24150: W=10.4 (0.41) H=16.5 (0.65) 

(Component allocation is model specific) Dimensions in mm (inch) Tolerances: ±0.5 (±0.02) Pin pitch Tolerance   ±0.25 (±0.01) Pin profile Tolerance   ±0.1 (±0.004) 

All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated. 

**Page 4 / 5** 

**April 15, 2026** 

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**TSR 3 Series, 3 A** 

## **Optional version with angular pins (Suffix A)** 

**==> picture [269 x 194] intentionally omitted <==**

**----- Start of picture text -----**<br>
W 6.6<br>(0.26)<br>Square pins<br>0.64 x 0.64<br>(0.025 x 0.025)<br>5 4 x 1.70 1<br>4.8<br>(4 x 0.067) (0.19)<br>H<br>**----- End of picture text -----**<br>


|Pinout|Pinout|Pinout|
|---|---|---|
|Pin|positive|negative|
|1|Remote On/Off||
|2|+Vin (Vcc)||
|3|GND|–Vout|
|4|+Vout|GND|
|5|Trim||



TSR 3-0533 & TSR 3-1250:   W=9.4 (0.37) H=15.5 (0.61) TSR 3-2450 & TSR 3-24150: W=10.4 (0.41) H=16.5 (0.65) 

(Component allocation is model specific) Dimensions in mm (inch) Tolerances: ±0.5 (±0.02) Pin pitch Tolerance   ±0.25 (±0.01) Pin profile Tolerance   ±0.1 (±0.004) 

©   Copyright 2025 Traco Electronic AG 

Specifications can be changed without notice. 

Rev. April 15, 2026 **Page 5 / 5** 

www.tracopower.com 



## Links

- [View this product on Novapart](https://novapart.co/products/TSR%203-1250/non-isolated-pol-dc-converter-compact-ite-sip-18-w)
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- [Supplier page](https://es.farnell.com/tracopower/tsr-3-1250/dc-dc-0-6v-to-6v-3a/dp/2080625)
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