Cincon CQB50W12-72SXX-CMFC(D) Series DC/DC Converter
The Cincon CQB50W12 CMFC(D) Series is a rugged range of isolated DC/DC converters designed for railway, industrial, and infrastructure applications requiring reliable low-voltage power from wide and fluctuating DC sources. With a 12:1 ultra-wide input range (14–160 Vdc), the series is well suited for rolling stock, trackside equipment, and harsh...
Read MoreThe Cincon CQB50W12 CMFC(D) Series is a rugged range of isolated DC/DC converters designed for railway, industrial, and infrastructure applications requiring reliable low-voltage power from wide and fluctuating DC sources. With a 12:1 ultra-wide input range (14–160 Vdc), the series is well suited for rolling stock, trackside equipment, and harsh industrial environments where supply conditions are unpredictable.
Delivering up to 50 W of regulated output power, the CQB50W12 series is available with single output options of 5 Vdc, 12 Vdc, 24 Vdc, or 48 Vdc. High efficiency (up to 89%), low no-load power consumption, and fully regulated outputs ensure stable operation for control electronics, communication modules, and auxiliary systems.
The converters feature a chassis-mount, baseplate-cooled design for fanless operation and long service life. Compliance with EN50155, EN45545-2, and IEC/EN/UL 62368-1 makes the CQB50W12 CMFC(D) Series a dependable choice for rail and other safety-critical infrastructure applications. Optional covers, heatsinks, and DIN-rail mounting accessories provide flexibility for system integration.
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Features
- Input voltage: 14–160 Vdc (72 Vdc nominal)
- Output voltage options: 5 Vdc, 12 Vdc, 24 Vdc, or 48 Vdc (single output)
- Output current up to 4.2A
- Isolated DC/DC converter power rating: 30–50 W
- Galvanically isolated input and output (3000 Vdc I/O isolation)
- High efficiency: up to 89%
- Wide operating case temperature: –40 °C to +100 °C
- Chassis-mount, baseplate-cooled design (fanless)
- Fully protected: OCP, OVP, OTP, UVLO, short-circuit protection
Specifications
| ABSOLUTE MAXIMUM RATINGS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Input Voltage | Continuous | All | -0.3 | 160 | Vdc | |
| Input Surge Voltage | 100ms max. | All | 200 | Vdc | ||
| Operating Case Temperature | At the center part of base plate | All | -40 | 100 | ℃ | |
| Storage Temperature | All | -40 | 105 | ℃ | ||
| INPUT CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Operating Input Voltage | All | 14 | 72 | 160 | Vdc | |
| Input Under Voltage Lockout | ||||||
| Turn-On Voltage Threshold | Full Load | All | 14.2 | 14.6 | 15 | Vdc |
| Turn-Off Voltage Threshold | Full Load | All | 11.6 | 12.6 | 13 | Vdc |
| Lockout Hysteresis Voltage | Full Load | All | 2.0 | Vdc | ||
| Maximum Input Current | Vin=16.8V, Full load | Other | 4 | A | ||
| No-Load Input Current | Vin=72V, Io=0A | See Model Number Table | mA | |||
| OUTPUT CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Voltage Set Point Accuracy | Vin=72V, Full load, Tc=25℃ | All | -1.0 | +1.0 | % | |
| Output Voltage Regulation | ||||||
| Load Regulation | Full load to no load | All | ±0.2 | % | ||
| Line Regulation | Vin=High line to low line, full load | All | ±0.2 | % | ||
| Temperature Coefficient | Tc=-40℃ to 100℃ | All | ±0.02 | %/℃ | ||
| Output Voltage Ripple and Noise (5Hz to 20MHz bandwidth) | ||||||
| Peak-to-Peak RMS. |
Full load, 1uF ceramic capacitors | All | 100 40 |
mV | ||
| Output Current Range | Vin= 14 to 160V | See Model Number Table | A | |||
| Over Current Protection | Hiccup Mode. Auto recovery | All | 110 | 180 | 220 | % |
| Short Circuit Protection | All | Continuous, Auto Recovery. | ||||
| External Load Capacitance | Full load (resistive) | See Model Number Table | uF | |||
| Output Voltage Trim Range | Po≦max. rated power, Io≦Io_max. | All | -20 | +10 | % | |
| Output Voltage Remote Sense Range | Po≦max. rated power, Io≦Io_max. % of nominal Vo |
All | +10 | % | ||
| Over Voltage Protection | Limited voltage, % of nominal Vo | All | 115 | 125 | 140 | % |
| EFFICIENCY | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| 100% Load | Vin=72V, 110V | See Model Number Table | % | |||
| DYNAMIC CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ |
Max. |
Units |
| Output Voltage Current Transient | ||||||
| Error Band | 75% to 100% of Io_max step load change di/dt=0.1A/us (within 1% Vout nominal) |
All | ±5 | % | ||
| Recovery Time | 250 | us | ||||
| Turn-On Delay and Rise Time | Full load (Constant resistive load) | |||||
| Turn-On Delay Time, From On/Off Control | Von/off to 10%Vo_set, Remote on | All | 15 | ms | ||
| Turn-On Delay Time, From Input | Vin_min to 10%Vo_set, Power up | All | 15 | ms | ||
| Output Voltage Rise Time | 10%Vo_set to 90%Vo_set | All | 10 | ms | ||
| ISOLATION CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Isolation Voltage (100% factory Hi-Pot tested @2sec.) |
1 Minute; Input to output 1 Minute; Input to case (base plate) 1 Minute; Output to case (base plate) |
All | 3000 2500 500 |
Vac Vac Vac |
||
| Isolation Resistance | Input to output | All | 200 | MΩ | ||
| Isolation Capacitance | Input to output Input to case (base plate) Output to case (base plate) |
All | 3000 5000 10000 |
pF | ||
| FEATURE CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Switching Frequency | Pulse wide modulation (PWM), Fixed | All | 215 | 240 | 265 | KHz |
| On/Off Control, Remote On/Off Logic, Refer to –Vin pin | ||||||
| Logic Low (Module Off) | Von/off at Ion/off>1.0mA | All | 0 | 1.2 | V | |
| Logic High (Module On) | Von/off at Ion/off=0.0uA, Pin open=on | All | 3.5 | 160 | ||
| On/Off Control, Negative Remote On/Off Logic, Refer to -Vin Pin | ||||||
| Logic High (Module Off) | Von/off at Ion/off=0.0uA, Pin open=off | All | 4.0 | 160 | V | |
| Logic Low (Module On) | Von/off at Ion/off=1.0mA | 0 | 1.2 | |||
| On/Off Current (for Both remote on/off logic) | Ion/off at Von/off=0V | All | 0.3 | 1 | mA | |
| Leakage Current (for Both Remote On/Off Logic) | Logic high, Von/off=15V | All | 30 | uA | ||
| Off Converter Input Current | Shutdown input idle current | All | 3 | 5 | mA | |
| Over Temperature Shutdown | Temperature at the center part of base plate, non-latching | All | 110 | ℃ | ||
| Over Temperature Recovery | 100 | |||||
| GENERAL SPECIFICATIONS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| MTBF | Io=100% of Io_max; MIL-HDBK - 217F_Notice 1, GB, 25℃ |
36S12 36S24 36S48 |
484 515 513 |
K hours |
||
| Weight |
-CMFC |
215 |
grams | |||
| Base plate Material | Aluminum | |||||
| Potting Material | UL 94V-0 (DC Module) | |||||
| Shock/Vibration | EN50155 (EN61373) Compliant (Except -HD) | |||||
| Humidity | 95% RH max. Non Condensing | |||||
| Altitude | 5000m Operating Altitude, 12000m Transport Altitude | |||||
| Thermal Shock | MIL-STD-810F | |||||
| Fire & Smoke | EN 45545-2 Compliant | |||||
| EMI | EN 55032 & EN 50155 (with external output filter) Compliant | Class A | ||||
| ESD | EN 61000-4-2 | Perf. Criteria A | ||||
| Radiated immunity | EN 61000-4-3 | Perf. Criteria A | ||||
| Fast Transient | EN 61000-4-4 | Perf. Criteria A | ||||
| Surge | EN 61000-4-5 | Perf. Criteria A | ||||
| Conducted immunity | EN 61000-4-6 | Perf. Criteria A | ||||
| Interruptions of Voltage Supply | EN 50155 | Perf. Criteria A | ||||
| Supply Change Over | EN 50155 | Perf. Criteria A | ||||
| Application Note Link CQB50W12-72S CMFC(D) Series App Notes Packaging Information Link Packaging Information |
||||||
| IMMUNITY TO ENVIRONMENTAL CONDITIONS | ||||
|---|---|---|---|---|
| Phenomenon | EN50155; 2017 Reference Clause(s) |
Reference Standard |
Test Conditions |
Result |
| Low Temperature Start-up test |
13.4.4 | EN 60068-2-1 | Class OT4 Temperature: -40℃ Duration: 2 hrs |
Pass |
| Dry Heat Test | 13.4.5 | EN 60068-2-2 |
Class OT4 & ST2 |
Pass |
| Low Temperature Storage Test |
13.4.6 | EN 60068-2-1 | Temperature: -40℃ Duration: 16 hrs |
Pass |
| Cyclic Damp Heat Test | 13.4.7 | EN 60068-2-30 | Temperature: 25℃-55℃ Humidity: 90 ~ 96% RH Duration: 48 hrs |
Pass |
| Random Vibration Test | 13.4.11 | EN 61373 | TTemperature: 26℃±3℃ Humidity: 50% ±25% RH Frequency range: 5 ~ 150 Hz Vertical: 1.01 𝑚𝑠⁄2 Transverse: 0.450 𝑚𝑠⁄2 Longitudinal: 0.700 𝑚𝑠⁄2 Duration: 10 min / axis |
Pass |
| Simulated Long Life Test at Increased Random Vibration Levels |
13.4.11 | EN 61373 | Temperature: 26℃±3℃ Humidity: 70% ±-5% RH Frequency range: 5 ~ 150 Hz Vertical: 5.72 𝑚𝑠⁄2 Transverse: 2.55 ms⁄2 Longitudinal: 3.96 𝑚𝑠⁄2 Duration: 5 hrs / axis |
Pass |
| Shock Test | 13.4.11 | EN 61373 | Temperature: 26℃±3℃ Humidity: 70% ±5% RH Frequency range: 5 ~ 150 Hz ±Vertical: 30 ms⁄2 ±Transverse: 30 𝑚𝑠⁄2 ±Longitudinal: 50 𝑚𝑠⁄2 Duration: 30ms x18 (Each axis 3 shocks) |
Pass |
| EN45545-2 FIRE & SMOKE TEST CONDITIONS | |||
|---|---|---|---|
| Item | Notes and Conditions |
Standard |
Hazard Level |
| R22 | Oxygen Index Test | EN 45545-2: 2013+A1:2015 EN ISO 4589-2: 2017 |
HL1, HL2, HL3 |
| Smoke Density Test | EN 45545-2: 2013+A1:2015 EN ISO 5659-2: 2017 |
HL1, HL2, HL3 | |
| Smoke Toxicity Test | EN 45545-2: 2013+A1:2015 NF X70-100-1 and -2: 2006 |
HL1, HL2, HL3 | |
| R23 | Oxygen Index Test | EN 45545-2: 2013+A1:2015 EN ISO 4589-2: 2017 |
HL1, HL2, HL3 |
| Smoke Density Test | EN 45545-2: 2013+A1:2015 EN ISO 5659-2: 2013 |
HL1, HL2, HL3 |
|
| Smoke Toxicity Test | EN 45545-2: 2013+A1:2015 NF X70-100-1 and -2: 2006 |
HL1, HL2, HL3 |
|
| R24 | Oxygen Index Test | EN 45545-2: 2013 EN ISO 4589-2 |
HL1, HL2, HL3 |
| R25 | Glow - Wire Test | EN 45545-2+A1:2016 EN 60695-2-11:2014 |
HL1, HL2, HL3 |
| R26 | Vertical Flame Test | EN 45545-2: 2013 EN 60695-11-10: 2013 |
HL1, HL2, HL3 |
Selection Table
| MODEL NUMBER | INPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT CURRENT | INPUT CURRENT | % EFF. | CAPACITOR LOAD MAX | ||
|---|---|---|---|---|---|---|---|---|
| MIN. | MAX. | NO LOAD | FULL LOAD | |||||
| CQB50W12-72S12☐-CMFD |
14-160 Vdc |
12 Vdc |
0 mA | 4.2 A | 8 mA | 810 mA | 87 | 6800uF |
| CQB50W12-72S24☐-CMFD |
14-160 Vdc |
24 Vdc |
0 mA | 2.1 A | 8 mA | 810 mA | 89 | 3300μF |
| CQB50W12-72S48☐-CMFD |
14-160 Vdc |
48 Vdc |
0 mA | 1.05 A | 12 mA | 810 mA | 88 | 680μF |
NOTE:
1. Nominal input voltage 72 VDC, input voltage range: 14-16.8 VDC (t ≤ 60 sec.).
2. ☐ = N or none
3. VR1 is used for output voltage adjustment.
4. Refer to application note for thermal resistance and derating information.
5. TVS is included for input surge voltage protection.
6. Recommend an external fuse for input reverse polarity protection (shunt diode is included inside).
7. Output connector CN3 wafer with TAIWAN KING pin terminal P110I series and mate with JST housing PH series or equivalent.
8. CN1 & CN2 connection: DINKLE EK500V-04P series or equivalent, suitable electric wire: 24~12AWG (IEC 0.5~2.5mm2).
PART NUMBER
| SERIES | NOMINAL INPUT VOLTAGE | NUMBER OF OUTPUTS | NOMINAL OUTPUT VOLTAGE | REMOTE ON/OFF LOGIC | CHASSIS MOUNT TYPE | HEATSINK | |
|---|---|---|---|---|---|---|---|
| CQB50W12- | II | O | XX | L | -YYY | Z | +WWW |
| CQB50W12 |
72 : 72 VDC |
S：Single |
12 : 12VDC |
None : Positive N：Negative |
CMF : Chassis Mount Built in Filter |
C： |
None：Blank HS：Heatsink HD：Heatsink+Din Rail |
Part Number Example:
CQB50W12-72S12N-CMFD: Chassis Mount, 50W, 12:1 14-160Vdc Input, Single 12Vdc Output, Negative Logic, with cover.
Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.