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DQD50-48-S5H-DIN
DC-DC ISOLATED, 50W, 18~75 VDC INPUT
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- Manufacturer: CUI
- Product type: Isolated DIN Rail Mount DC / DC Converters
- SVHC: No SVHC (04-Feb-2026)
| Delivery and price | |
|---|---|
| Units per pack | 36 |
| Price | 39.65 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**date** 01/28/2026 **page** 1 of 12 ## **SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER ## **FEATURES** - up to 50 W isolated output - single regulated outputs - over voltage, input under voltage, short circuit, and over current protections - remote on/off control - 1,500 Vdc isolation - -40 ~ 105°C temperature range, with derating - certified to IEC/EN 62368-1 - PCB, chassis and DIN-rail mount options |ois CE|CG|CG||||||| |---|---|---|---|---|---|---|---|---| |**MODEL**|**input**<br>**voltage**||**output**<br>**voltage**||**output**<br>**current**|**output**<br>**power**|**ripple**<br>**& noise1**|**efficiency2**| ||**typ**|**range**|**typ**||**max**|**max**|**max**|**typ**| ||(Vdc)|(Vdc)|(Vdc)||(A)|(W)|(mVp-p)|(%)| |DQD50-24-S5|24|9~36|5||10.0|50|150|92| |DQD50-24-S12|24|9~36|12||4.167|50|150|92| |DQD50-24-S15|24|9~36|15||3.333|50|150|92| |DQD50-24-S24|24|9~36|24||2.083|50|150|92| |DQD50-48-S5|48|18~75|5||10.0|50|150|92| |DQD50-48-S12|48|18~75|12||4.167|50|150|92| |DQD50-48-S15|48|18~75|15||3.333|50|150|92| |DQD50-48-S24|48|18~75|24||2.083|50|150|92| |Notes:<br>1. The ripple and noise is measured at 5%~100% load and 20MHz bandwidth. 0% ~5% load ripple & noise is less than or equal to 5%Vo; the ripple & noise test adopts||1. The ripple and noise is measured at 5%~100% load and 20MHz bandwidth. 0% ~5% load ripple & noise is less than or equal to 5%Vo; the ripple & noise test adopts||||||1. The ripple and noise is measured at 5%~100% load and 20MHz bandwidth. 0% ~5% load ripple & noise is less than or equal to 5%Vo; the ripple & noise test adopts| |the parallel line test method, see the ripple & noise test instructions for details.<br>2. The efficiency is tested at full load.<br>3. Unless otherwise specified, all values or indicators in this manual are tested at Ta=25°C, humidity<75%RH, rated input voltage and rated load (pure resistance load).|||||3. Unless otherwise specified, all values or indicators in this manual are tested at Ta=25°C, humidity<75%RH, rated input voltage and rated load (pure resistance load).|3. Unless otherwise specified, all values or indicators in this manual are tested at Ta=25°C, humidity<75%RH, rated input voltage and rated load (pure resistance load).||3. Unless otherwise specified, all values or indicators in this manual are tested at Ta=25°C, humidity<75%RH, rated input voltage and rated load (pure resistance load).| |**PART NUMBER KEY**||||||||| ||**DQD50 - XX - S XX X **||||**- X**|||| |Base Number|Base Number|||||Mounting Style:||| |||||||“blank” = board mount||| ||Input Voltage|||||T = chassis mount||| ||Output Voltage<br>Output:||Output Voltage|Heatsink||DIN = DIN-rail mount||| ||S = single|||“blank” = no heatsink||||| |||||H = with heatsink|H = with heatsink|||| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 2 of 12 ## **INPUT** |**INPUT**|| |---|---| |**parameter**|**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**| |input voltage range|24 Vdc input models<br>48 Vdc input models<br>9<br>18<br>24<br>48<br>36<br>75<br>Vdc<br>Vdc| |input current|24 Vd input models, at full load<br>48 Vd input models, at full load<br>6.4<br>3.0<br>A<br>A| |input current (full load/no load)|24 Vdc input; 5 Vdc output model<br>24 Vdc input; 12, 15 Vdc output models<br>24 Vdc input; 24 Vdc output models<br>48 Vdc input; 5, 12, 15 Vdc output models<br>48 Vdc input; 24 Vdc output models<br>2264/8<br>2264/4<br>2264/3<br>1133/4<br>1133/3<br>mA<br>mA<br>mA<br>mA<br>mA| |surge voltage|1 second max<br>24 Vdc input models<br>48 Vdc input models<br>-0.7<br>-0.7<br>50<br>100<br>Vdc<br>Vdc| |start-up voltage|24 Vdc input models<br>48 Vdc input models<br>8<br>16<br>Vdc<br>Vdc| |turn-of voltage threshold|24 Vdc input models<br>48 Vdc input models<br>7<br>15<br>Vdc<br>Vdc| |flter|Pi flter| |no load power consumption|0.1<br>W| |remote on/of4|module on<br>CTRL pin suspended or pulled high (3~12 Vdc)| ||module of<br>CTRL pin connected to -Vin or pulled low (0~1.2 Vdc)| |input current when of|10<br>mA| Notes: 4. The voltage of CTRL pin is relative to -Vin pin. |**OUTPUT**|||||| |---|---|---|---|---|---| |**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**| ||5 Vdc output models|||10,000|μF| |maximum capacitive load|12 Vdc output models<br>15 Vdc output models|||3,700<br>2,000|μF<br>μF| ||24 Vdc output models|||1,000|μF| |voltage accuracy|||±1|±3|%| |voltage regulation|full voltage range, nominal load||±0.2|±0.5|%| |load regulation|5% ~ 100% load||±0.5|±1|%| |transient response recovery|25% rated load step change||300|500|µs| ||25% rated load step change||||| |transient response deviation|5 Vdc output models||±5|±10|%| ||all other models||±3|±5|%| |temperature coefcient||||±0.03|%/ºC| |start-up time|at rated input voltage and constant resistance load||20|100|ms| |switching frequency|PWM mode||300||kHz| |adjustability|via trim|90||110|%| |**PROTECTIONS**|||||| |**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**| |over current protection|5 Vdc output model<br>all other models|110<br>110|150<br>150|240<br>200|%<br>%| |over voltage protection||110|130|160|%| |short circuit protection|continuous, auto recovery, hiccup||||| |output overshoot||||10|%| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 3 of 12 ## **SAFETY AND COMPLIANCE** |**parameter**|**conditions/description**||**min**|**typ**|**max**|**units**| |---|---|---|---|---|---|---| |isolation voltage|input to output for 1 minute, 1 mA max<br>input/output to case for 1 minute, 1 mA max||1,500<br>1,000|||Vdc<br>Vdc| |isolation capacitance|input to output, (100 kHz, 0.1V)|||1,000||pF| |safety approvals|certifed to 62368-1: IEC, EN|||||| |conducted emissions|CISPR32/EN55032 Class B (see recommended circuit)|||||| |radiated emissions|CISPR32/EN55032 Class B (see recommended circuit)|||||| |ESD|IEC/EN61000-4-2 Contact ±6 kV, perf. Criteria B|||||| |radiated immunity|IEC/EN61000-4-3 10 V/m, perf. Criteria A (see recommended circuit)|||||| |EFT/burst|IEC/EN61000-4-4 ±2 kV, perf. Criteria B (see recommended circuit)|||||| |surge|IEC/EN61000-4-5 ±2 kV, perf. Criteria B (see recommended circuit)|||||| |conducted immunity|IEC/EN61000-4-6 10 Vrms, perf. Criteria A (see recommended circuit)|||||| |vibration|10-150 Hz, 5G, 0.75mm. along X, Y and Z axis|||||| |MTBF|as per MIL-HDBK-217F at 25 °C|1,000,000||||hours| |RoHS|yes|||||| |**ENVIRONMENTAL**||||||| |**parameter**|**conditions/description**||**min**|**typ**|**max**|**units**| |operating temperature|see derating curve||-40||105|°C| |storage temperature|||-55||125|°C| |operating humidity|non condensing||5||95|%| |max case temperature|||||105|°C| |**SOLDERING**||||||| |**parameter**|**conditions/description**||**min**|**typ**|**max**|**units**| |pin soldering temperature|1.5mm from the case for 10 seconds||||300|°C| |**MECHANICAL**||||||| |**parameter**|**conditions/description**||**min**|**typ**|**max**|**units**| ||board mount: 50.8 x 25.4 x 11.8 [2.000 x 1.000 x|0.464 inches]||||mm| ||board mount with heatsink: 50.8 x 25.4 x 21.8 [2.000||x 1.000 x 0.858 inches]|||mm| |dimensions|chassis mount: 76.0 x 31.5 x 21.3 [2.990 x 1.240 x 0.838 inches]<br>chassis mount with heatsink 76.0 x 31.5 x 31.0 [2.990 x 1.240 x 1.220 inches]|||||mm<br>mm| ||DIN-rail mount: 76.0 x 31.5 x 26.0 [2.990 x 1.240|x 1.023 inches]||||mm| ||DIN-rail mount with heatsink: 76.0 x 31.5 x 35.5 [2.990 x 1.240 x 1.397 inches]|||||mm| |case material|aluminum|||||| ||board mount|||36||g| ||board mount with heatsink|||48||g| |weight|chassis mount<br>chassis mount with heatsink|||57<br>69||g<br>g| ||DIN-rail mount|||77||g| ||DIN-rail mount with heatsink|||89||g| |cooling|natural convection|||||| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 4 of 12 ## **MECHANICAL DRAWING** ## **Board Mount** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±0.50 [±0.020] |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| ## **Board Mount with Heatsink** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±0.50 [±0.020] |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 5 of 12 ## **MECHANICAL DRAWING (CONTINUED)** ## **Chassis Mount** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±1.00 [±0.039] wire range: 24~12 AWG tightening torque: max 0.4 N·m |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| ## **Chassis Mount with Heatsink** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±1.00 [±0.039] wire range: 24~12 AWG tightening torque: max 0.4 N·m] |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 6 of 12 ## **MECHANICAL DRAWING (CONTINUED)** ## **DIN-rail Mount** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±1.00 [±0.039] wire range: 24~12 AWG tightening torque: max 0.4 N·m |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| ## **DIN-rail Mount with Heatsink** units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±1.00 [±0.039] wire range: 24~12 AWG tightening torque: max 0.4 N·m |PIN CONNECTIONS|PIN CONNECTIONS| |---|---| |PIN|Single| |1|+Vin| |2|-Vin| |3|Ctrl| |4|Trim| |5|-Vout| |6|+Vout| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 7 of 12 ## **DERATING CURVES** ## **EFFICIENCY CURVES** **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 8 of 12 ## **RIPPLE AND NOISE TEST INSTRUCTION** 1. The Ripple & Noise test needs the cables in parallel, an oscilloscope that should be set at the Sample Mode, bandwidth 20MHz. 100M bandwidth probe with cap and ground removed. One polypropylene capacitor C1 (0.1µF) and one high-frequency low-resistance electrolytic capacitor C2(10uF) are connected in parallel with the probe. 2. Refer to the test diagram, the converter output connects to the electronic load by the jig with cables which size should be - definedaccording to the output current value. The test can start at the converter output terminals after the input power on. 3. It is recommended to connect a ≥5% load or a high-frequency low resistance electrolytic capacitor (≥470µF) load to the output toavoid the output ripple increasing. ## **Figure 1** ## **APPLICATION NOTES** ## **Figure 2 5 Vdc output model** ## **Table 1** **==> picture [141 x 80] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |5 Vdc output model| |COMPONENT|PARAMETER| |C0|100 µF / 100 V| |C1|330 µF / 50 V| |C2|1 µF / 16 V| |C3|10 µF / 16 V| **----- End of picture text -----**<br> ## **Figure 3 all other output models** ## **Table 2** 12 & 15 Vdc output models **==> picture [296 x 112] intentionally omitted <==** **----- Start of picture text -----**<br> ||| |---|---| |COMPONENT|PARAMETER| |+| |C0|100 µF / 100 V| |C1|100 µF / 25 V| |24 Vdc output model| |COMPONENT|PARAMETER| |C0|100 µF / 100 V| |C1|47 µF / 50 V| |—-—| **----- End of picture text -----**<br> **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 9 of 12 ## **EMC RECOMMENDED CIRCUIT** ## **Figure 4 5 Vdc output model** **Table 3** COMPONENT 24 Vdc 48 Vdc Fuse TBD by customer MOV1 14D470K 14D101K LCM1 2.2 mH LCM2 1.0 mH LCM3, LCM4 270 µH C1, C4, C5, C8 330 µF/100 V C2, C3 4.7 µF/100 V C6, C7 10 µF/100 V C9, C10 100 µF/100 V CY1, CY3 2.2 nF/2 kV CY2, CY4 10 nF/2 kV ~~==~~ **Figure 5 12 & 15 Vdc output model** **Table 4** |COMPONENT|PARAMETER| |---|---| |Fuse|TBD by<br>customer| |MOV|14D470K| |LDM1|2.2 µH| |LCM1|2.2 mH| |LCM2|/| |C0|680 µH/100 V| |C1, C2|4.7 µF/100 V| |C3|10 µF/100 V| |C4|10 µF/100 V| |C5|330 µF/100 V| |C6|100 µF/50 kV| |CY1, CY2|2.2 nF/2 kV| **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 10 of 12 ## **EMC RECOMMENDED CIRCUIT (CONTINUED)** ## **Figure 6** ## **24 Vdc output model** **Table 5** ||**Table 5**| |---|---| |COMPONENT|PARAMETER| |Fuse|TBD by customer| |MOV|14D470K| |LDM1|/| |LCM1|10 mH| |LCM2|10 mH| |C0|680 µH/100 V| |C1, C2|4.7 µF/100 V| |C3|10 µF/100 V| |C4|47 µF/100 V| |C5|330 µF/100 V| |C6|100 µF/50 kV| |CY1, CY2|2.2 nF/2 kV| Note: Part 1 in the circuit is for EMS test, part 2 for EMI filtering, both can be adjusted according to the actual situation. **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 11 of 12 ## **TRIM RESISTOR AND CALCULATION (SINGLE OUTPUT MODELS ONLY)** ## **Figure 7** **Table 6** **==> picture [278 x 93] intentionally omitted <==** **----- Start of picture text -----**<br> |||||| |---|---|---|---|---| |V|R|R|R|V| |NOM|TOP|BOTTOM|O|REF| |(Vdc)|(kΩ)|(kΩ)|(kΩ)|(V)| |5|24|24.0|68|2.5| |12|75|19.73|30|2.5| |15|24|4.78|30|2.5| |24|68|7.89|30|2.5| **----- End of picture text -----**<br> Note: Value for RTOP, RBOTTOM, RO, and VREF refer to Table 6 (fixed internal values). RTRIM: Trim resistance a: User-defined parameter, no actual meanings - VNOM: Nominal output voltage - VOUT: Target output voltage **belfuse** .com Please read our datasheet & drawing disclaimer here. **CUI Inc │ SERIES:** DQD50 **│ DESCRIPTION:** DC-DC CONVERTER **date** 01/28/2026 **│ page** 12 of 12 ## **REVISION HISTORY** |**rev.**|**description**|**date**| |---|---|---| |1.0|initial release|01/28/2026| The revision history provided is for informational purposes only and is believed to be accurate. **==> picture [119 x 38] intentionally omitted <==** 15575 SW Sequoia Pkwy #100 Portland, OR 97224 800.275.4899 Fax 503.612.2383 Belfuse.com powersupport@belf.com CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Please read our datasheet & drawing disclaimer here.
Updated at April 29, 2026
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