DC/DC Railway Converter
•
•
Compact 1” x 1” metal package
•
Qualification for fire behavior according
to EN 45545-2
•
Wide 4:1 input voltage: 9-36, 18-75,
36-160 VDC
•
•
•
•
•
•
THN 20WIR Series, 20 Watt
EN 50155 and EN 61373 approval for
railway applications
UL 62368-1 IEC 62368-1
Operating temperature range -40 to
+65 °C without derating
The THN 20WIR series is a family of ruggedized 20 Watt DC/DC converters for
highest reliability in harsh environments. The converters have a wide 4:1 input
range and increased resistance against electromagnetic interference, shock/viHigh efficiency up to 91%
bration and thermal shock and come in a six-side shielded 1” x 1” metal package. The innovative design provides high efficiencies up to 91% and thus en3000 VDC I/O-isolation
able an operating temperature range from -40 to +65°C without derating. The
Protection against overload, overvoltage approvals according to standards EN 50155 and EN 61373 qualify them for
and short circuit
railway and transportation systems. Additional qualification for the fire behavior
of components according to EN 45545-2 and the safety approval according
Remote On/Off and Trim function
IEC/EN 62368-1, UL62368-1 support a potential compliance test of the appli3-year product warranty
cation. Built-in features like an internal EN 55032 class A filter, input undervoltage-lockout, short circuit protection, remote On/Off and output voltage trim
make this series suitable for almost any application demands and thus facilitate
the design-in process.
Models
Order Code
Input Voltage
Range
THN 20-2410WIR
THN 20-2411WIR
THN 20-2412WIR
THN 20-2413WIR
THN 20-2415WIR
THN 20-2422WIR
THN 20-2423WIR
THN 20-2425WIR
THN 20-4810WIR
THN 20-4811WIR
THN 20-4812WIR
THN 20-4813WIR
THN 20-4815WIR
THN 20-4822WIR
THN 20-4823WIR
THN 20-4825WIR
THN 20-7210WIR
THN 20-7211WIR
THN 20-7212WIR
THN 20-7213WIR
THN 20-7215WIR
THN 20-7222WIR
THN 20-7223WIR
THN 20-7225WIR
www.tracopower.com
9 - 36 VDC
(24 VDC nom.)
18 - 75 VDC
(48 VDC nom.)
36 - 160 VDC
(110 VDC nom.)
Output 1
Output 2
Vnom
Imax
3.3 VDC
5.1 VDC
12 VDC
15 VDC
24 VDC
+12 VDC
+15 VDC
+24 VDC
3.3 VDC
5.1 VDC
12 VDC
15 VDC
24 VDC
+12 VDC
+15 VDC
+24 VDC
3.3 VDC
5.1 VDC
12 VDC
15 VDC
24 VDC
+12 VDC
+15 VDC
+24 VDC
5'500 mA
4'000 mA
1'670 mA
1'330 mA
833 mA
833 mA
667 mA
417 mA
5'500 mA
4'000 mA
1'670 mA
1'330 mA
833 mA
833 mA
667 mA
417 mA
5'500 mA
4'000 mA
1'670 mA
1'330 mA
833 mA
833 mA
667 mA
417 mA
September 28, 2023
Vnom
Efficiency
Imax
–12 VDC
–15 VDC
–24 VDC
833 mA
667 mA
417 mA
–12 VDC
–15 VDC
–24 VDC
833 mA
667 mA
417 mA
–12 VDC
–15 VDC
–24 VDC
833 mA
667 mA
417 mA
typ.
88 %
89 %
89 %
89 %
91 %
89 %
90 %
91 %
89 %
90 %
89 %
90 %
91 %
89 %
90 %
91 %
88 %
90 %
90 %
90 %
91 %
90 %
90 %
91 %
Page 1 / 5
THN 20WIR Series, 20 Watt
Options
THN-HS2
- Optional Heat Sink: www.tracopower.com/products/thn-hs2.pdf
on demand
- Optional Heat Sink: www.tracopower.com/products/thn-hs3.pdf
(backorder with MOQ
non stocking item) - Optional Heat Sink: www.tracopower.com/products/thn-hs4.pdf
Input Specifications
Input Current
- At no load
24 Vin models:
48 Vin models:
110 Vin models:
24 Vin models:
48 Vin models:
110 Vin models:
24 Vin models:
48 Vin models:
110 Vin models:
24 Vin models:
48 Vin models:
110 Vin models:
Surge Voltage
Under Voltage Lockout
Recommended Input Fuse
Input Filter
9 mA typ.
7 mA typ.
6 mA typ.
50 VDC max. (1 s max.)
100 VDC max. (1 s max.)
185 VDC max. (1 s max.)
7.5 VDC min. / 8 VDC typ. / 8.8 VDC max.
15.5 VDC min. / 16 VDC typ. / 17.5 VDC max.
32 VDC min. / 34 VDC typ. / 35.5 VDC max.
4'000 mA (slow blow)
2'000 mA (slow blow)
1'000 mA (slow blow)
(The need of an external fuse has to be assessed
in the final application.)
Internal Pi-Type
Output Specifications
Output Voltage Adjustment
Voltage Set Accuracy
Regulation
–10% to +20% (24 Vout models)
±10% (other models)
(single output models only)
(By external trim resistor)
- Input Variation (Vmin - Vmax)
- Load Variation (10 - 90%)
Ripple and Noise
(20 MHz Bandwidth)
- Cross Regulation
(25% / 100% asym. load)
- single output
- dual output
Capacitive Load
- single output
- dual output
See application note: www.tracopower.com/overview/thn20wir
Output power must not exceed rated power!
±1% max.
single output models: 0.2% max.
dual output models: 0.5% max.
single output models: 0.1% max.
dual output models: 0.8% max. (Output 1)
0.8% max. (Output 2)
dual output models: 5% max.
3.3 Vout models:
5.1 Vout models:
12 Vout models:
15 Vout models:
24 Vout models:
12 / -12 Vout models:
15 / -15 Vout models:
24 / -24 Vout models:
3.3 Vout models:
5.1 Vout models:
12 Vout models:
15 Vout models:
24 Vout models:
12 / -12 Vout models:
15 / -15 Vout models:
24 / -24 Vout models:
Minimum Load
Temperature Coefficient
75 mVp-p typ. (w/ 22 µF, 25 V X7R)
75 mVp-p typ. (w/ 22 µF, 25 V X7R)
100 mVp-p typ. (w/ 22 µF, 25 V X7R)
100 mVp-p typ. (w/ 22 µF, 25 V X7R)
125 mVp-p typ. (w/ 4.7 µF, 50 V X7R)
100 / 100 mVp-p typ. (w/ 10 µF, 25 V X7R)
100 / 100 mVp-p typ. (w/ 10 µF, 25 V X7R)
125 / 125 mVp-p typ. (w/ 4.7 µF, 50 V X7R)
8'000 µF max.
5'000 µF max.
850 µF max.
700 µF max.
220 µF max.
500 / 500 µF max.
350 / 350 µF max.
100 / 100 µF max.
Not required
±0.02 %/K max.
All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated.
www.tracopower.com
September 28, 2023
Page 2 / 5
THN 20WIR Series, 20 Watt
Hold-up Time
Start-up Time
Short Circuit Protection
Output Current Limitation
Overvoltage Protection
Transient Response
10 ms min. (acc. to EN 50155 Class S2, see
application note for ext. capacitor calculation:
www.tracopower.com/info/holdup_en50155.pdf)
30 ms typ. / 40 ms max.
Continuous, Automatic recovery
170% typ. of Iout max.
110 - 164% of Vout nom.
250 µs typ. (25% Load Step)
- Response Time
Safety Specifications
Standards
EN 62368-1
IEC 62368-1
UL 62368-1
EN 50155
- IT / Multimedia Equipment
- Railway Applications
- Certification Documents
www.tracopower.com/overview/thn20wir
Pollution Degree
PD 2
EMC Specifications
EMI Emissions
EN 50121-3-2 (EMC for Rolling Stock)
EN 55032 class A (internal filter)
EN 55032 class B (with external filter)
EN 55032 class A (internal filter)
EN 55032 class B (with external filter)
- Conducted Emissions
- Radiated Emissions
EMS Immunity
- Electrostatic Discharge
- RF Electromagnetic Field
- EFT (Burst) / Surge
- Conducted RF Disturbances
- PF Magnetic Field
External filter proposal: www.tracopower.com/overview/thn20wir
(for 110 Vin models a 47 µF / 200 V Nippon
chemi-con KXJ capacitor is required to comply
with EN 55032 classA)
EN 50121-3-2 (EMC for Rolling Stock)
Air: EN 61000-4-2, ±8 kV, perf. criteria A
Contact: EN 61000-4-2, ±6 kV, perf. criteria A
EN 61000-4-3, 20 V/m, perf. criteria A
EN 61000-4-4, ±2 kV, perf. criteria A
EN 61000-4-5, ±2 kV, perf. criteria A
Ext. input component: 24 Vin models: 220 µF, 100 V, KY || TVS
SMDJ58A
48 Vin models: 220 µF, 100 V, KY
110 Vin models: 150 µF, 200 V, KXJ || TVS
SMBJ300A
EN 61000-4-6, 10 Vrms, perf. criteria A
Continuous: EN 61000-4-8, 100 A/m, perf. criteria A
1 s: EN 61000-4-8, 1000 A/m, perf. criteria A
General Specifications
Relative Humidity
Temperature Ranges
- Operating Temperature
Power Derating
- Case Temperature
- Storage Temperature
- High Temperature
Over Temperature
Protection Switch Off
- Protection Mode
- Measurement Point
Cooling System
95% max. (non condensing)
–40°C to +85°C
–40°C to +90°C (with Heat Sink)
+105°C max.
–55°C to +125°C
Depending on model
See application note: www.tracopower.com/overview/thn20wir
105°C min. / 115°C typ. / 130°C max.
(Automatic recovery at 100°C typ.)
Case
Natural convection (20 LFM)
All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated.
www.tracopower.com
September 28, 2023
Page 3 / 5
THN 20WIR Series, 20 Watt
Remote Control
- Voltage Controlled Remote
- Off Idle Input Current
- Remote Pin Input Current
Altitude During Operation
Switching Frequency
Insulation System
Isolation Test Voltage
- Input to Output, 60 s
- Input to Case, 60 s
- Output to Case, 60 s
Isolation Resistance
Isolation Capacitance
Reliability
Washing Process
- Input to Output, 500 VDC
- Input to Output, 100 kHz, 1 V
- Calculated MTBF
Environment
- Vibration
- Mechanical Shock
- Thermal Shock
- Flammability
On: 3.0 to 15 VDC or open circuit
Off: 0 to 1.2 VDC or short circuit
Refers to 'Remote' and '-Vin' Pin
2.5 mA typ.
-0.5 to 1.0 mA
5'000 m max.
230 - 310 kHz (PWM) (24 & 48 Vin, 3.3 & 5.1
Vout models)
290 - 370 kHz (PWM) (24 & 48 Vin, other
models)
210 - 270 kHz (PWM) (110 Vin, 3.3 & 5.1 Vout
models)
260 - 340 kHz (PWM) (110 Vin, other models)
Functional Insulation
3'000 VDC (110 Vin models)
2'250 VDC (other models)
2'250 VDC (110 Vin models)
1'600 VDC (other models)
2'250 VDC (110 Vin models)
1'600 VDC (other models)
1'000 MΩ min.
2'000 pF max.
1'200'000 h (MIL-HDBK-217F, ground benign)
According to Cleaning Guideline
www.tracopower.com/info/cleaning.pdf
MIL-STD-810F
EN 61373
MIL-STD-810F
EN 61373
MIL-STD-810F
EN 45545-2
www.tracopower.com/info/en45545-declaration.pdf
Housing Material
Base Material
Potting Material
Pin Material
Pin Foundation Plating
Pin Surface Plating
Housing Type
Mounting Type
Connection Type
Footprint Type
Soldering Profile
Copper
Non-conductive FR4 (UL 94 V-0 rated)
Silicone (UL 94 V-0 rated)
Copper
Nickel (2 - 3 µm)
Tin (3 - 5 µm), matte
Metal Case
PCB Mount
THD (Through-Hole Device)
1" x 1"
Lead-Free Wave Soldering
260°C / 6 s max.
16 g
Weight
Thermal Impedance
15.5 K/W typ. (without heatsink)
12.3 K/W typ. (with heatsink THN-HS2)
10.7 K/W typ. (with heatsink THN-HS3)
9.1 K/W typ. (with heatsink THN-HS4)
- Case to Ambient
Environmental Compliance - REACH Declaration
www.tracopower.com/info/reach-declaration.pdf
REACH SVHC list compliant
REACH Annex XVII compliant
- RoHS Declaration
www.tracopower.com/info/rohs-declaration.pdf
- SCIP Reference Number
Exemptions: 7a, 7c-I
(RoHS exemptions refer to the component
concentration only, not to the overall
concentration in the product (O5A rule).)
3ab574be-5dc2-42ab-a0ef-a6eed2e2be7e
All specifications valid at nominal voltage, resistive full load and +25°C after warm-up time, unless otherwise stated.
www.tracopower.com
September 28, 2023
Page 4 / 5
THN 20WIR Series, 20 Watt
Supporting Documents
Overview Link (for additional Documents)
www.tracopower.com/overview/thn20wir
Outline Dimensions
7.62
5.08
10.2
Ø1.0
(0.300)
(0.200)
(0.40)
(0.04)
6
(0.800)
Bottom view
20.32
1
(1.00)
2
25.4
3
Pinout
4
5
10.16
10.16
5.6
9.9
(0.400)
(0.400)
(0.22)
(0.39)
25.4
(1.00)
Pin
Single
Dual
1
+Vin (Vcc)
+Vin (Vcc)
2
–Vin (GND)
–Vin (GND)
3
Remote On/Off
Remote On/Off
4
+Vout
+Vout
5
Trim
Common
6
–Vout
–Vout
Dimensions in mm (inch)
Tolerances: x.x ±0.5 (±0.02)
x.xx ±0.25 (±0.01)
Pin diameter ±0.1 (±0.004)
© Copyright 2023 Traco Electronic AG
Specifications can be changed without notice.
www.tracopower.com
Rev. September 28, 2023
Page 5 / 5