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DATASHEET
Rev. A
DCHF20W SERIES
2:1 Input Voltage Range
Single, Dual, and Triple Outputs
20~36.5 Watts Output Power
DC/DC Chassis Mount Power Converters
FEATURES
• Single, Dual, and Triple Outputs
• RoHS Compliant
• Output Voltage Adjustability
• Free Air Convection
• 2:1 Input Voltage Range
• High Reliability
• Built-in EMI Filter
• 20~36.5W Output Power
• Dimensions: 4.37 x 3.07 x 1.42 Inches
• Short Circuit and Over Load Protected
DESCRIPTION
The DCHF20W series of DC/DC power converters offers from 20W to 36.5W of output power in a 4.37” x 3.07” x 1.42”
enclosed case. This series has 2:1 input voltage ranges of 10-18VDC, 18-36VDC, 36-72VDC, and 72-144VDC. This series
also has single, dual, and triple output models available. Some features include output adjustability, a built-in EMI filter,
and short circuit and over load protection. All models in this series are RoHS compliant.
12/03/2010
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 4
DCHF20W Series
20~36.5 Watts
Single, Dual, and Triple Outputs
DC/DC Chassis Mount Power Converters
Rev. A
SPECIFICATIONS: DCHF20W Series
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
12VDC nominal input models
10
12
18
24VDC nominal input models
18
24
36
48VDC nominal input models
36
48
72
110VDC nominal input models
72
110
144
Unit
INPUT SPECIFICATIONS
Input Voltage Range
VDC
OUTPUT SPECIFICATIONS
Output Voltage
See Table
Output Voltage Adjustment Range
Line Regulation
Load Regulation
Single Output Models
-10
+10
Multi-Output Models: V1
-5
+5
Full load
≤ -0.5
≤ +0.5
V1
≤ -0.5
≤ +0.5
V2,3 (with regulators)
≤ -3
≤ +3
V2,3 (without regulators)
≤ -6
≤ +6
Output Current
See Table
Output Power
See Table
Ripple & Noise
See Table
%
%
%
PROTECTION
Over Load Protection
110
Short Circuit Protection
150
%
Yes
GENERAL SPECIFICATIONS
Efficiency
See Table
Input to Output
1000
Withstand Voltage
Input to FG
All for 1 minute
1000
Output to FG
500
Isolation Resistance
At 500VDC
> 100
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature
Operating Humidity (non-condensing)
Storage Temperature
Storage Humidity (non-condensing)
Cooling Method
PHYSICAL SPECIFICATIONS
-10
20
-20
20
VDC
MΩ
+50
90
+85
95
Free air convection
°C
% RH
°C
% RH
4.37 x 3.07 x 1.42 inches
(111 x 78 x 36 mm)
8.82oz (250g)
Dimensions (L x W x H)
Weight
SAFETY & EMC CHARACTERISTICS
Safety Standards
Design refer to LVD
EMC Standards
Design refer to EN55022, EN61000-4
Due to advances in technology, specifications subject to change without notice.
12/03/2010
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 2 of 4
DCHF20W Series
20~36.5 Watts
Single, Dual, and Triple Outputs
DC/DC Chassis Mount Power Converters
Rev. A
MODEL SELECTION TABLES
SINGLE OUTPUT MODELS
Model
DCHF20W-SD12-5
DCHF20W-SD12-12
DCHF20W-SD12-24
DCHF20W-SD24-5
DCHF20W-SD24-12
DCHF20W-SD24-24
DCHF20W-SD48-5
DCHF20W-SD48-12
DCHF20W-SD48-24
DCHF20W-SD110-5
DCHF20W-SD110-12
DCHF20W-SD110-24
Input Voltage
12 VDC
(10 – 18 VDC)
24 VDC
(18 – 36 VDC)
48 VDC
(36 – 72 VDC)
110 VDC
(72 – 144 VDC)
Output Voltage
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
5 VDC
12 VDC
24 VDC
Output Current
4.0 A
2.0 A
1.0 A
4.0 A
2.0 A
1.0 A
4.0 A
2.0 A
1.0 A
4.0 A
2.0 A
1.0 A
Ripple & Noise
100mVp-p
120mVp-p
150mVp-p
100mVp-p
120mVp-p
150mVp-p
100mVp-p
120mVp-p
150mVp-p
100mVp-p
120mVp-p
150mVp-p
Output Power
20W
24W
24W
20W
24W
24W
20W
24W
24W
20W
24W
24W
Efficiency
70%
72%
74%
70%
72%
74%
70%
72%
74%
70%
72%
74%
Ripple & Noise
100mVp-p
120mVp-p
120mVp-p
120mVp-p
100mVp-p
120mVp-p
120mVp-p
120mVp-p
100mVp-p
120mVp-p
120mVp-p
120mVp-p
100mVp-p
120mVp-p
120mVp-p
120mVp-p
Output Power
Efficiency
27W
71%
24W
72%
27W
71%
24W
72%
27W
71%
24W
72%
27W
71%
24W
72%
Ripple & Noise
100mVp-p
120mVp-p
120mVp-p
100mVp-p
150mVp-p
150mVp-p
100mVp-p
120mVp-p
120mVp-p
100mVp-p
150mVp-p
150mVp-p
100mVp-p
120mVp-p
120mVp-p
100mVp-p
150mVp-p
150mVp-p
100mVp-p
120mVp-p
120mVp-p
100mVp-p
150mVp-p
150mVp-p
Output Power
Efficiency
34.1W
69%
36.5W
70%
34.1W
69%
36.5W
70%
34.1W
69%
36.5W
70%
34.1W
69%
36.5W
70%
DUAL OUTPUT MODELS
Model
DCHF20W-DD12-A
DCHF20W-DD12-B
DCHF20W-DD24-A
DCHF20W-DD24-B
DCHF20W-DD48-A
DCHF20W-DD48-B
DCHF20W-DD110-A
DCHF20W-DD110-B
Input Voltage
V1
V2
V1
V2
V1
V2
V1
V2
V1
V2
V1
V2
V1
V2
V1
V2
12 VDC
(10 – 18 VDC)
24 VDC
(18 – 36 VDC)
48 VDC
(36 – 72 VDC)
110 VDC
(72 – 144 VDC)
Output Voltage
5 VDC
12 VDC
12 VDC
12 VDC
5 VDC
12 VDC
12 VDC
12 VDC
5 VDC
12 VDC
12 VDC
12 VDC
5 VDC
12 VDC
12 VDC
12 VDC
Output Current
0.4 ~ 3.0 A
0 ~ 1.0 A
0.2 ~ 1.2 A
0 ~ 0.8 A
0.4 ~ 3.0 A
0 ~ 1.0 A
0.2 ~ 1.2 A
0 ~ 0.8 A
0.4 ~ 3.0 A
0 ~ 1.0 A
0.2 ~ 1.2 A
0 ~ 0.8 A
0.4 ~ 3.0 A
0 ~ 1.0 A
0.2 ~ 1.2 A
0 ~ 0.8 A
TRIPLE OUTPUT MODELS
Model
DCHF20W-TD12-A
DCHF20W-TD12-B
DCHF20W-TD24-A
DCHF20W-TD24-B
DCHF20W-TD48-A
DCHF20W-TD48-B
DCHF20W-TD110-A
DCHF20W-TD110-B
12/03/2010
Input Voltage
V1
V2
V3
V1
V2
V3
V1
V2
V3
V1
V2
V3
V1
V2
V3
V1
V2
V3
V1
V2
V3
V1
V2
V3
12 VDC
(10 – 18 VDC)
24 VDC
(18 – 36 VDC)
48 VDC
(36 – 72 VDC)
110 VDC
(72 – 144 VDC)
Output Voltage
5 VDC
12 VDC
-12 VDC
5 VDC
15 VDC
-15 VDC
5 VDC
12 VDC
-12 VDC
5 VDC
15 VDC
-15 VDC
5 VDC
12 VDC
-12 VDC
5 VDC
15 VDC
-15 VDC
5 VDC
12 VDC
-12 VDC
5 VDC
15 VDC
-15 VDC
Output Current
0.3 ~ 2.5 A
0.1 ~ 1.0 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 0.8 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 1.0 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 0.8 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 1.0 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 0.8 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 1.0 A
0.1 ~ 0.8 A
0.3 ~ 2.5 A
0.1 ~ 0.8 A
0.1 ~ 0.8 A
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 3 of 4
Rev. A
DCHF20W Series
20~36.5 Watts
Single, Dual, and Triple Outputs
DC/DC Chassis Mount Power Converters
MECHANICAL DRAWING
Unit: inches (mm)
COMPANY INFORMATION
Wall Industries, Inc. has created custom and modified units for over 50 years. Our in-house research and development engineers will
provide a solution that exceeds your performance requirements on-time and on budget. Our ISO9001-2008 certification is just one
example of our commitment to producing a high quality, well-documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its
customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for
your project above and beyond the design and production phases. Give us a call today to discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
12/03/2010
(603)778-2300
(888)597-9255
(603)778-9797
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 4