DQD6N-48-D24-DIN

**date** 09/02/2025 **page** 1 of 9 

## **SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

## **FEATURES** 

- up to 6 W isolated output 

- single and dual regulated outputs 

- over voltage, input under voltage, short circuit, and over current protections 

- remote on/off control 

- 1,500 Vdc isolation 

- -40 ~ 85°C temperature range, with derating 

- certified to IEC/EN 62368-1 

- PCB, chassis and DIN-rail mount options 

|nn!<br>UK<br>ols CE CR||||||||
|---|---|---|---|---|---|---|---|
|**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)|(mA)|(W)|(mVp-p)|(%)|
|DQD6-24-S3|24|9~36|3.3|1,500|4.95|100|77|
|DQD6-24-S5|24|9~36|5|1,200|6|100|83|
|DQD6-24-S9|24|9~36|9|667|6|100|84|
|DQD6-24-S12|24|9~36|12|500|6|100|85|
|DQD6-24-S15|24|9~36|15|400|6|100|86|
|DQD6-24-S24|24|9~36|24|250|6|100|86|
|DQD6-24-S40|24|9~36|40|150|6|100|86|
|DQD6-24-D5|24|9~36|±5|±600|6|100|82|
|DQD6-24-D9|24|9~36|±9|±333|6|100|84|
|DQD6-24-D12|24|9~36|±12|±250|6|100|85|
|DQD6-24-D15|24|9~36|±15|±200|6|100|86|
|DQD6-24-D24|24|9~36|±24|±125|6|100|86|
|DQD6-48-S3|48|18~75|3.3|1,500|4.95|100|80|
|DQD6-48-S5|48|18~75|5|1,200|6|100|84|
|DQD6-48-S9|48|18~75|9|667|6|100|85|
|DQD6-48-S12|48|18~75|12|500|6|100|87|
|DQD6-48-S15|48|18~75|15|400|6|100|88|
|DQD6-48-S24|48|18~75|24|250|6|100|87|
|DQD6-48-D5|48|18~75|±5|±600|6|100|83|
|DQD6-48-D9|48|18~75|±9|±333|6|100|84|
|DQD6-48-D12|48|18~75|±12|±250|6|100|87|
|DQD6-48-D15|48|18~75|±15|±200|6|100|88|
|DQD6-48-D24|48|18~75|±24|±125|6|100|86|



- Notes: 1. The ripple & noise ≤5%Vo at 0% ~ 5% load, it is tested by the twisted pair method. Please refer to the Ripple & noise test instructions below. 

2. The efficiency is tested at full 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). 

**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 2 of 9 

## **PART NUMBER KEY** 

## **- - - DQD6 X XX X XX X** 

Base Number 

CTRL pin: Input Voltage “blank” = with CTRL pin N = no control pin 

Output: Output Voltage S = single D = dual 

Mounting Style: “blank” = board mount T = chassis mount DIN = DIN-rail mount 

## **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|
|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|
|turn-on voltage threshold|at full load<br>24 Vdc input models<br>48 Vdc input models<br>9<br>18<br>Vdc<br>Vdc|
|turn-of voltage threshold|at full load<br>24 Vdc input models<br>48 Vdc input models<br>5.5<br>12<br>6.5<br>15<br>Vdc<br>Vdc|
|flter|Pi flter|
|refected ripple current|at rated input voltage<br>20<br>mA|
|remote on/of|module on<br>CTRL pin opened or pulled high (3~12 Vdc) with respect to -Vin|
||module of<br>CTRL pin pulled low (0~1.2 Vdc) with respect to -Vin|
|**OUTPUT**||
|**parameter**|**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**|
|maximum capacitive load|3.3, 5 Vdc output models<br>±5, 9 Vdc output models<br>12, 15, 24 Vdc output models<br>40 Vdc output models<br>±9, ±12, ±15 Vdc output models<br>±24 Vdc output models<br>2200<br>1000<br>680<br>470<br>330<br>220<br>μF<br>μF<br>μF<br>μF<br>μF<br>μF|
|voltage accuracy|5% ~ 100% load<br>±1<br>±3<br>%|
||0% ~ 5% load<br>single output<br>dual output<br>±1<br>±2<br>±3<br>±5<br>%<br>%|
|voltage balance|dual output<br>±0.5<br>±1.5<br>%|
|voltage regulation|full voltage range, full<br>load<br>positive output<br>negative output<br>±0.2<br>±0.5<br>±0.5<br>±1<br>%<br>%|
|load regulation|5% ~ 100% load<br>positive output<br>negative output<br>±0.5<br>±0.5<br>±1<br>±1.5<br>%<br>%|
|transient response deviation|25% rated load step change<br>±3<br>±5<br>%|
|transient response recovery|25% rated load step change<br>300<br>500<br>µs|
|start-up time|at rated input voltage and constant resistance load<br>10<br>ms|
|temperature coefcient|±0.03<br>%/°C|
|switching frequency|PWM mode<br>300<br>kHz|



**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 3 of 9 

|**PROTECTIONS**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|over current protection||110|150|260|%|
|over voltage protection||110|160|230|%|
|short circuit protection|continuous, auto recovery|||||
|output overshoot||||10|%|
|**SAFETY AND COMPLIANCE**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|isolation voltage|input to output for 1 minute, 1 mA max|1,500|||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 ±4 kV, Air ±8 kV, Perf. Criteria B|||||
|radiated immunity|IEC/EN61000-4-3 10 V/m, Perf. Criteria A|||||
|conducted immunity|IEC/EN61000-4-6 3 Vrms, Perf. Criteria A|||||
|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||85|°C|
|storage temperature||-55||125|°C|
|operating humidity|non condensing|5||95|%|
|**MECHANICAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||board mount: 25.4 x 25.4 x 11.0 [1.000 x 1.000 x 0.433 inches]||||mm|
|dimensions|chassis mount: 76.0 x 31.5 x 21.3 [2.990  x 1.240 x 0.838 inches]||||mm|
||DIN-rail mount: 76.0 x 31.5 x 26.0 [2.990 x 1.240 x 1.023 inches]||||mm|
|case material|aluminum|||||
||board mount||15||g|
|weight|chassis mount||36||g|
||DIN-rail mount||56||g|
|cooling|natural convection|||||



**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 4 of 9 

## **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|Dual|
||1|-Vin|-Vin|
||2|+Vin|+Vin|
||3|+Vout|+Vout|
|1.00<br>y|4<br>5|NC<br>GND|COM<br>-Vout|
|6<br>Ctrl<br>No<br>pin<br>—__}<br>,<br>t<br>~~f~~|||Ctrl<br>No<br>pin|



Note:  NC = no connection 

**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 5 of 9 

## **MECHANICAL DRAWING (CONTINUED)** 

## **Chassis Mount** 

units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±0.50 [±0.02] wire range: 24~12 AWG tightening torque: max 0.4 N·m 

|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|
|---|---|---|---|---|
|PIN|Single||Dual||
|1|-Vin||-Vin||
|2|+Vin||+Vin||
|3|+Vout||+Vout||
|4|NC||COM||
|5|GND||-Vout||
|6|Ctrl|No<br>pin|Ctrl|No<br>pin|



Note:  NC = no connection 

## **DIN-rail Mount** 

units: mm [inch] pin diameter tolerance: ±0.10 [±0.004] general tolerance: ±0.50 [±0.02] wire range: 24~12 AWG tightening torque: max 0.4 N·m 

|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|PIN CONNECTIONS|
|---|---|---|---|---|
|PIN|Single||Dual||
|1|-Vin||-Vin||
|2|+Vin||+Vin||
|3|+Vout||+Vout||
|4|NC||COM||
|5|GND||-Vout||
|6|Ctrl|No<br>pin|Ctrl|No<br>pin|



Note:  NC = no connection 

**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 6 of 9 

## **DERATING CURVES** 

## **EFFICIENCY CURVES** 

**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 7 of 9 

## **RIPPLE AND NOISE TEST INSTRUCTION** 

**1.** The ripple noise test requires the following setup: 

   - 12 twisted pair cables. 

   - An oscilloscope configured to Sample Mode with a bandwidth of 20 MHz. 

   - A 100 MHz bandwidth probe with the capacitor and ground removed. 

   - Capacitors C2 (0.1 µF), a polypropylene capacitor, and C3 (10 µF), a high-frequency, low-resistance electrolytic capacitor, connected in parallel to the probes and one side of the twisted pair. 

   - C0 and C1 refer to the application circuit as per the recommended specifications. 

**2.** The power supply output is connected to the load using cables. The opposite end of the twisted pair (30 cm ± 2 cm in length) should be connected in parallel with the load. Ensure that the polarity of the output and the oscilloscope probe is correct and not reversed. The test can start once the power is switched on. 

## **Figure 1** 

## **RIPPLE AND NOISE TEST CIRCUIT** 

## **Figure 2** 

**Table 1** 

|COMPONENT|PARAMETER|
|---|---|
|C|100 µF/ 100 V|
|L|4.7 µH|



**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 8 of 9 

## **APPLICATION NOTES** 

## **Figure 3 Single output** 

## **Table 2** 

|COMPONENT|PARAMETER|
|---|---|
|C0|100 µF/ 100 V|
|C1|10 µF/ 50 V|



## **Figure 4 Dual output** 

## **Table 3** 

|COMPONENT|PARAMETER|
|---|---|
|C1|100 µF/ 100 V|
|C2, C3|10 µF/ 50 V|



## **EMC RECOMMENDED CIRCUIT** 

## **Figure 5** 

## **Table 4** 

||**Table 4**||
|---|---|---|
|COMPONENT|24 Vdc|48 Vdc|
|Fuse|TBD by customer||
|MOV|10D470K|10D101K|
|C0, C3|330 µF/50 V|100 µF/100 V|
|C1, C2, C4|10 µF/50 V|10 µF/100 V|
|LCM1|10 mH||
|CY1, CY2|1 nF/3 kV||



Note:     1. Section 1 of the circuit diagram corresponds to EMS, while Section 2 handles EMI filtering. Both sections can be modified to suit specific requirements or situations. 

**belfuse** .com 

**CUI Inc │ SERIES:** DQD6 **│ DESCRIPTION:** DC-DC CONVERTER 

**date** 09/02/2025 **│ page** 9 of 9 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|05/29/2025|
|1.01|no controlpin option added|07/21/2025|
|1.02|remote on/of description added to input section|09/02/2025|



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.