I7A24045A033V-0F1-R.

DC-DC CONVERTER, 3.3-18V, 45A

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: TDK-LAMBDA
Product type: DC / DC Non Isolated Board Mount Converters - Adjustable Output
Power Supply Applications:ITE; DC / DC Converter Type:Sixteenth Brick; Output Power Max:750W; Output Voltage Min:3.3V; Output Voltage Max:18V; Output Current Max:45A; In 09AJ9511

Delivery and price
Units per pack	50
Price	74.94 €
Current stock	10+
Lead time	30 days

Datasheet

i7A Series 

https://product.tdk.com/en/power/i7a www.emea.lambda.tdk.com/i7a 

400-750W, 9 to 18V, 18 to 32V, 18 to 60V or 28 to 60V Input Non-Isolated Step Down DC-DC Converter 

The i7A series of up to 750W non-isolated DC-DC step-down converters are ideal for creating additional high current/high power 20A, 33A, 45A and 60A output voltage rails from a single output 12V, 24V, 36V or 48V AC-DC or DC-DC power supply. The highly efficient i7A series has low ripple, excellent dynamic response under sudden load changes, accepts a wide DC input with a wide output adjustment range and optional current limit (OCP) adjust.  Three mechanical configurations are available; low profile open frame, baseplate construction for conduction cooling, or models with an integral heat sink for convection or forced air cooling. The i7A series expands upon TDK-Lambda’s existing 100 to 250W rated i3A / i6A series and reduces the need to parallel modules. 

|**Features**|**Benefits**|
|---|---|
|• Up to 750W in a 1/16th Brick Footprint|• High Power Density, Less Board Area Needed|
|• High Efficiency - Up to 98.5%|• Longer Battery Life / Less Power Consumed|
|• Wide 0.8 to 8V or 3.3 up to 32V Output Adjustment|• One Part Supports Multiple System Voltages|
|• 9 to 18V, 18 to 32V, 18 to 60V or 28 to 60V Input|• Can Operate From Different DC Source Voltages Including Batteries|
|• Low Component Count With Minimal External Components|• Low Cost|
|• Minimal Derating Requirements in Low Airflow Environments|• Easy To Cool In End System|



## **Model Selector** 

|**Model Selector**|||||||||
|---|---|---|---|---|---|---|---|---|
||Input|Output|Max O/P|Max O/P|Remote|Adjustable|Integrated|Integrated|
|Model|Voltage|Voltage|Current|Power|On/Off|(OCP)|Heatsink|Baseplate|
||(V)|(V)|(A)|(W)|Logic|Current Limit|||
|i7A4W033A033V-000-R|18 - 60|3.3 - 24|33|500|Positive|-|-|-|
|i7A4W033A033V-001-R|18 - 60|3.3 - 24|33|500|Negative|-|-|-|
|i7A4W033A033V-003-R|18 - 60|3.3 - 24|33|500|Negative|Yes|-|-|
|i7A4W033A033V-0C1-R|18 - 60|3.3 - 24|33|500|Negative|-|-|Yes|
|i7A4W033A033V-0C3-R|18 - 60|3.3 - 24|33|500|Negative|Yes|-|Yes|
|i7A4W033A033V-0F1-R|18 - 60|3.3 - 24|33|500|Negative|-|Yes|-|
|i7A4W033A033V-0F3-R|18 - 60|3.3 - 24|33|500|Negative|Yes|Yes|-|
|i7A24045A033V-000-R|18 - 32|3.3 - 18|45|750|Positive|-|-|-|
|i7A24045A033V-001-R|18 - 32|3.3 - 18|45|750|Negative|-|-|-|
|i7A24045A033V-003-R|18 - 32|3.3 - 18|45|750|Negative|Yes|-|-|
|i7A24045A033V-0C1-R|18 - 32|3.3 - 18|45|750|Negative|-|-|Yes|
|i7A24045A033V-0C3-R|18 - 32|3.3 - 18|45|750|Negative|Yes|-|Yes|
|i7A24045A033V-0F1-R|18 - 32|3.3 - 18|45|750|Negative|-|Yes|-|
|i7A24045A033V-0F3-R|18 - 32|3.3 - 18|45|750|Negative|Yes|Yes|-|
|i7A12060A008V-000-R|9 - 18|0.8 - 8|60|400|Positive|-|-|-|
|i7A12060A008V-001-R|9 - 18|0.8 - 8|60|400|Negative|-|-|-|
|i7A12060A008V-003-R|9 - 18|0.8 - 8|60|400|Negative|Yes|-|-|
|i7A12060A008V-0C1-R|9 - 18|0.8 - 8|60|400|Negative|-|-|Yes|
|i7A12060A008V-0C3-R|9 - 18|0.8 - 8|60|400|Negative|Yes|-|Yes|
|i7A12060A008V-0F1-R|9 - 18|0.8 - 8|60|400|Negative|-|Yes|-|
|i7A12060A008V-0F3-R|9 - 18|0.8 - 8|60|400|Negative|Yes|Yes|-|
|i7A48020A033V-000-R|28 - 60|3.3 - 32|20|500|Positive|-|-|-|
|i7A48020A033V-001-R|28 - 60|3.3 - 32|20|500|Negative|-|-|-|
|i7A48020A033V-003-R|28 - 60|3.3 - 32|20|500|Negative|Yes|-|-|
|i7A48020A033V-0C1-R|28 - 60|3.3 - 32|20|500|Negative|-|-|Yes|
|i7A48020A033V-0C3-R|28 - 60|3.3 - 32|20|500|Negative|Yes|-|Yes|
|i7A48020A033V-0F1-R|28 - 60|3.3 - 32|20|500|Negative|-|Yes|-|
|i7A48020A033V-0F3-R|28 - 60|3.3 - 32|20|500|Negative|Yes|Yes|-|
|Preferred Model|||||||||



i7A Series 

1 

**==> picture [517 x 34] intentionally omitted <==**

|**Specifcation**|**Specifcation**|**Specifcation**|**Specifcation**|**Specifcation**|**Specifcation**|
|---|---|---|---|---|---|
|Model<br>i7A4W033A033V|||i7A24045A033V|i7A12060A008V|i7A48020A033V|
|**Input**||||||
|Input Voltage Range|Vdc|18 - 60 (Turn on at 16.5 typ)|18 - 32 (Turn on at 16.5 typ)|9 - 18 (Turn on at 8.1 typ)|28 - 60 (Turn on at 8.1V typ)|
|Input Transient (t < 100 ms)|Vdc|65 max|36 max|22 max|22 max|
|Input Current (max)<br>|A|50||65|35|
|Effciency<br>|%|91 - 98|93 - 98.5|86 - 97|92-96|
|Safety Certifcations and Markings|-|IEC/EN/UL/CSA/EN62368-1, CE Mark and UKCA Mark||||
|**Output**||||||
|Output Voltage Tolerance|%|±3.5||||
|Switching Frequency|kHz|330||||
|Line Regulation|%|0.2||||
|Load Regulation|%|0.4|||0.3|
|External Load Capacitance|uF|220 - 10000|330 - 10000|||
|Output Current|A|0 - 33|0 - 45|0 - 60|0 - 20|
|Ripple & Noise|mVpp|25||40|25|
|Overcurrent Protection Threshold (typ)|A|45|63|70|30|
|Overtemperature Protection|-|Yes||||
|Remote Sense|-|(+) Sense, compensating up to 5% of output voltage||||
|Remote On/Off|-|See Model Selector table<br>||||
|Output Voltage Adjust|-|See detailed specifcations for trim equation.<br>||||
|Output Current Limit Adjust|-|See Model Selector and detailed specifcations.||||
|Dynamic Response|-|420 mV / 70 μs typ.<br>Vo=12V, 1 A/μs,<br>25% to 75% max Io<br>|425 mV / 80 μs typ.<br>Vo=12V, 1 A/μs,<br>25% to 50% max Io|400 mV / 100 μs typ.<br>Vo=3.3V, 1 A/μs,<br>25% to 50% max Io|500 mV / 180 μs typ.<br>Vo=12V, 1 A/μs,<br>25% to 75% max Io|
|**Environmental**<br>||||||
|Operating Temperature (Tref)|°C|-40 to 125 (Seei7A Specifcations for Derating)||||
|Storage Temperature|°C|-55° to +125||||
|Humidity (non condensing)|%RH|5 - 95 (Operating & Storage)||||
|Cooling|-|Convection, conduction (baseplate) or forced air||||
|Altitude(2)|m|2000||||
|Random Vibration (Operating)||IEC 60068-2-64 / IPC9592B: 2.40 Grms, 10-500 Hz, 30 min per x, y, z axis||||
|Shock (Operating)||IEC 60068-2-27 / IPC9592B: 30G, 11ms per x, y, z axis||||
|**Other**||||||
|Weight (Typ)|g|Open Frame:  25g<br>With Baseplate:  50g<br>With Heatsink:  70g||||
|Size (LxWxH)|mm|Open Frame: 34 x 36.8 x 11.5<br>With Baseplate: 34 x 36.8 x 12.7<br>With Heatsink:  34 x 36.8 x 24.9||||
|Size (LxWxH)|Inches|Open Frame:  1.34 x 1.45 x 0.45<br>With Baseplate:  1.34 x 1.45 x 0.50<br>With Heatsink: 1.34 x 1.45 x 0.98||||
|MTBF - Telcordia SR-332|-|> 5 MHrs; 100% Load; Ta = 40 °C||||
|Warranty|yrs|3||||



Notes See website for detailed specifcations and test methods. 

(1) For Vo ≤ 1.2V, 470uF min capacitance is recommended. 

(2) Contact Technical Support for operation at higher alttiudes. 

i7A Series 

2 

## **Related Products** 

|Type|Part Number|Description|
|---|---|---|
|DC-DC Buck Converter|i3A|100W, Input 9-53V, Output 5-30V 4.5A or 3.3-16.5V 8A|
|DC-DC Buck Converter|i6A24|250W, Input 9-40V, Output 3.3-24V 14A|
|DC-DC Buck Converter|i6A4W|250W, Input 9-53V, Output 3.3-40V 10A or 3.3-15V 20A|
|DC-DC Buck-Boost Converter|i7C|300W, Input 9-53V or 9-36V, Output 9.6-48V 8A, 5-28V 12.5A or 8-24V 20A|
|DC-DC Buck Converter|RGA|250W, Input 9 up to 53V, Output 3.3 up to 40V, Rugged Modules|
|DC-DC Buck Converter|RGB|400-750W, Input 9 to 18V or 18 up to 60V,  Output 0.8 tp 8V or 3.3 up to 24V, Rugged Modules|
|DC-DC Buck-Boost Converter|RGC|300W, Input 9-53V, Output 9.6-48V 8A or 5-28V 12.5A, Rugged Modules|
|Evaluation Kit|i7A20A-C01-EVK-S1|Evaluation kit with i7A48020A033V-001-R Module|
|Evaluation Kit|i7A33A-C01-EVK-S1|Evaluation kit with i7A4W033A033V-001-R Module|
|Evaluation Kit|i7A45A-C01-EVK-S1|Evaluation kit with i7A24045A033V-001-R Module|
|Evaluation Kit|i7A60A-C01-EVK-S1|Evaluation kit with i7A12060A008V-001-R Module|



## **Typical Application Circuit (Standard model without output current limit adjust feature)** 

Note 

1.  The capacitor values can vary based on the application requirements. 

2.  TRIM resistor “Rup” should be connected to the i7A module as close as possible. 

## **Typical Application Circuit (Suffix -xx3-R with output current limit (OCP) adjust feature)** 

**==> picture [15 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
Note<br>**----- End of picture text -----**<br>


1. The capacitor values can vary based on the application requirements. 

2. TRIM resistor “Rup” should be connected to the i7A module as close as possible. 

3. Output current limit adjust TRIM resistor “Ritrim” should be connected to the i7A module as close as possible. 

i7A Series 

3 

**Output vs. Input Voltage Operating Range** 

## **i7A4W033A033V** 

## **i7A12060A008V** 

## **i7A24045A033V** 2 a 18 r =a eo gu 2 39 6 3 2 14 16 18 **i7A48020A033V** 

i7A Series 

4 

## **Mechanical Specification** 

**==> picture [236 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
Outline Drawing Open frame –00x-R product options<br>**----- End of picture text -----**<br>


**==> picture [42 x 249] intentionally omitted <==**

**----- Start of picture text -----**<br>
= 3.68 [0.145] Default 1572.59 [0.06[0.10 2]<br>2 Places;<br>1.02 [0.040]<br>1.83 [0.072]<br>2 or 3<br>24.9405<br>= 3.68 [0.145] Default<br>**----- End of picture text -----**<br>


## **Outline Drawing With Heatsink –xFx-R product options** 

**==> picture [237 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
Outline Drawing With Baseplate –xCx-R product options)<br>**----- End of picture text -----**<br>


**==> picture [40 x 5] intentionally omitted <==**

**----- Start of picture text -----**<br>
= 3.68 [0.145] Default<br>**----- End of picture text -----**<br>


i7A Series 

5 

## **Mechanical Specification** 

## **Recommended Hole Pattern (Top View)** 

## **Pinout** 

|PIN|FUNCTION|PIN|FUNCTION|
|---|---|---|---|
|1|Vin (+)|6|TRIM|
|2|On / Off|7|SENSE +|
|3|Vin (-) / GND|8|Vout (+)|
|4|Vout (-) / GND|9*|Vin (+)|
|5** Current Limit (OCP) Adjustment|5** Current Limit (OCP) Adjustment|10*|Vin (-) / GND|



* Pins 9 & 10 are added for products drawing higher input currents (e.g. i7A24045A033V and i7A12060A008V) ** Pin 5 is only populated when this feature is present. 

Pin base material is brass or copper with gold over nickel plating. 

i7A Series 

6 

## **TDK-Lambda France SAS** 

Tel: +33 1 60 12 71 65 tlf.fr-powersolutions@tdk.com www.emea.lambda.tdk.com/fr 

## **TDK-Lambda Americas** 

Tel:  +1 800-LAMBDA-4 or 1-800-526-2324 tla.powersolutions@tdk.com www.us.lambda.tdk.com 

## **Italy Sales Office** 

Tel: +39 02 61 29 38 63 tlf.it-powersolutions@tdk.com www.emea.lambda.tdk.com/it 

## **Netherlands** 

## **TDK Electronics do Brasil Ltda** 

Tel: +55 11 3289-9599 sales.br@tdk-electronics.tdk.com www.tdk-electronics.tdk.com/en 

tlf.nl-powersolutions@tdk.com www.emea.lambda.tdk.com/nl 

## **TDK-Lambda Germany GmbH** 

Tel: +49 7841 666 0 tlg.powersolutions@tdk.com www.emea.lambda.tdk.com/de 

## **TDK-Lambda Corporation** 

Tel: +81-3-6778-1113 www.jp.lambda.tdk.com 

## **TDK-Lambda (China) Electronics Co. Ltd.** 

Tel: +86 21 6485-0777 tlc.powersolutions@tdk.com www.lambda.tdk.com.cn 

## **Austria Sales Office** 

Tel: +43 2256 655 84 tlg.at-powersolutions@tdk.com www.emea.lambda.tdk.com/at 

## **Switzerland Sales Office** 

Tel: +41 44 850 53 53 tlg.ch-powersolutions@tdk.com www.emea.lambda.tdk.com/ch 

## **Nordic Sales Office** 

## **TDK-Lambda Singapore Pte Ltd.** 

Tel: +65 6251 7211 tls.marketing@tdk.com www.sg.lambda.tdk.com 

## **TDK India Private Limited, Power Supply Division** 

Tel:   +91 80 4039-0660 mathew.philip@tdk.com www.sg.lambda.tdk.com 

Tel: +45 8853 8086 tlg.dk-powersolutions@tdk.com www.emea.lambda.tdk.com/dk 

## **TDK-Lambda UK Ltd.** 

Tel: +44 (0) 12 71 85 66 66 tlu.powersolutions@tdk.com www.emea.lambda.tdk.com/uk 

## **TDK-Lambda Ltd.** 

Tel: +9 723 902 4333 tli.powersolutions@tdk.com www.emea.lambda.tdk.com/il-en 

For Additional Information, please visit ~~oe~~ https://product.tdk.com/en/power/ 

i7A_260712 June 24th, 2024 V7 

i7A Series 

7

Updated at April 10, 2026

TDK-Lambda is globally recognized as a premier manufacturer of highly reliable power supply solutions and power management equipment. With a strong engineering heritage, the company is a trusted partner for mission-critical applications across the industrial, medical, telecommunications, and test and measurement sectors, delivering components that meet stringent international performance and safety standards. Our extensive portfolio of TDK-Lambda products is heavily focused on comprehensive power and line protection, highlighted by a vast selection of industry-leading AC/DC converters. Engineered to deliver exceptional efficiency and stable performance in demanding environments, these power supplies form the backbone of our offering and are built to support the rigorous power demands of modern electronic infrastructure. To complement these primary power solutions, we also offer a targeted range of high-performance DC/DC converters designed for precise, board-level voltage regulation. Furthermore, to ensure the optimal performance and longevity of these power systems, our catalog includes specialized cooling and thermal management components, such as natural convection heat sinks, providing complete thermal stability for your most critical designs.

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