Technology
Performance Benchmarking
Measured 1:1 in a customer ESS PCS.
PERFORMANCE COMPARISON
Same rating, same footprint, same PCS. Only the module changed
The DICIO DHM1200GC170LX1 was installed in place of the Mitsubishi CMH1200DC-34S and compared by the customer in the same 480 kW ESS PCS power stage.
Both modules are 1700 V / 1200 A Hybrid SiC IGBT modules in the IHM 130 x 140 mm standard footprint.
This is measured data from the customer's production test facility, not simulation.
TEST SETUP
Only the module was swapped 1:1
in the customer PCSOnly the module was swapped 1:1 in the customer PCS
Measured on the customer's dual-PEBB production test rig with ambient temperature held at approximately 41.6-41.8℃.
Test configuration
Test environment
- SYSTEM
- 3-Phase 2-Level ESS PCS
- TEST RIG
- 480 Vac · 480 kW
- DC-LINK
- 740 / 920 / 1100 Vdc
- SWITCHING FREQUENCY
- 4-5 kHz
- LOAD
- 20-400 kW · 11 steps
- MODE
- Charge / Discharge
- CUSTOMER
- Korean PCS manufacturer · grid-tied ESS PCS
Held identical
Same PEBBSame Gate ResistanceSame Gate VoltageSame DC-LinkSame BusbarSame HeatsinkSame CoolingSame Control
Only one variable
Power Module OnlyMeasured on the customer's dual-PEBB production test rig with ambient temperature held at approximately 41.6-41.8℃.
Modules compared
| Item | DICIO | Mitsubishi |
|---|---|---|
| Model | DHM1200GC170LX1 | CMH1200DC-34S |
| Rating | 1700 V / 1200 A | 1700 V / 1200 A |
| Technology | Fast-type Trench IGBT + SiC SBD | IGBT + SiC SBD |
| Circuit | Half-Bridge | Half-Bridge |
| Footprint | IHM 130 × 140 mm | Same |
| Isolation | 4000 V | 4000 V |
| Design Target | 4-5 kHz PCS | General Purpose |
| Loss Target | Low Eoff / Low Cies · Cres | Low VCE(sat) |
| PCS Modification | None | - |
Model
DICIODHM1200GC170LX1
MitsubishiCMH1200DC-34S
Rating
DICIO1700 V / 1200 A
Mitsubishi1700 V / 1200 A
Technology
DICIOFast-type Trench IGBT + SiC SBD
MitsubishiIGBT + SiC SBD
Circuit
DICIOHalf-Bridge
MitsubishiHalf-Bridge
Footprint
DICIOIHM 130 × 140 mm
MitsubishiSame
Isolation
DICIO4000 V
Mitsubishi4000 V
Design Target
DICIO4-5 kHz PCS
MitsubishiGeneral Purpose
Loss Target
DICIOLow Eoff / Low Cies · Cres
MitsubishiLow VCE(sat)
PCS Modification
DICIONone
Mitsubishi-
SYSTEM EFFICIENCY
DICIO led at all 66 operating points
Efficiency was measured in charge and discharge modes at 11 load steps from 20 to 400 kW for each DC-link voltage.
740 Vdc
PCS Efficiency (%)PCS Output Power (kW)
- Charge
- +0.7 ~ +3.5 %p
- Discharge
- +0.15 ~ +3.5 %p
- Peak Efficiency
- 98.81% @ 240 kW
920 Vdc
PCS Efficiency (%)PCS Output Power (kW)
- Efficiency gain
- +0.1 ~ +2.0 %p
Even close to the optimum operating region for both modules, DICIO keeps higher efficiency across the whole load range.
1100 Vdc
PCS Efficiency (%)PCS Output Power (kW)
- Efficiency gain
- +0.2 ~ +1.7 %p
As the DC-link voltage rises, switching loss takes a larger share and the benefit of low Eoff becomes visible.
CONVERSION LOSS
The efficiency gap becomes a real heat-loss gap
PCS Conversion Loss — 740 Vdc Charging
Load (kW)
| Load (kW) | DICIO | Mitsubishi |
|---|---|---|
| 20 kW | 1.25 kW | 1.94 kW |
| 40 kW | 1.24 kW | 1.91 kW |
| 80 kW | 1.41 kW | 2.34 kW |
| 120 kW | 1.64 kW | 2.84 kW |
| 160 kW | 1.95 kW | 3.41 kW |
| 200 kW | 2.40 kW | 4.06 kW |
| 240 kW | 2.86 kW | 4.80 kW |
| 280 kW | 3.44 kW | 5.63 kW |
| 320 kW | 4.06 kW | 6.53 kW |
| 360 kW | 4.86 kW | 7.52 kW |
| 400 kW | 5.92 kW | 8.64 kW |
20 kW
DICIO1.25 kW
Mitsubishi1.94 kW
40 kW
DICIO1.24 kW
Mitsubishi1.91 kW
80 kW
DICIO1.41 kW
Mitsubishi2.34 kW
120 kW
DICIO1.64 kW
Mitsubishi2.84 kW
160 kW
DICIO1.95 kW
Mitsubishi3.41 kW
200 kW
DICIO2.40 kW
Mitsubishi4.06 kW
240 kW
DICIO2.86 kW
Mitsubishi4.80 kW
280 kW
DICIO3.44 kW
Mitsubishi5.63 kW
320 kW
DICIO4.06 kW
Mitsubishi6.53 kW
360 kW
DICIO4.86 kW
Mitsubishi7.52 kW
400 kW
DICIO5.92 kW
Mitsubishi8.64 kW
920 / 1100 Vdc4~20% Loss ReductionThe loss advantage is maintained across the full load range in the higher voltage regions as well.
DEVICE-LEVEL BENCHMARK
The system difference starts in switching energy
Module parameters
| Parameter | DICIO | Mitsubishi |
|---|---|---|
| VCE(sat) @ 300 A | 1.40 V | 1.25 V |
| VEC @ 300 A | 1.07 V | 1.13 V |
| Eon | 21.8 mJ | 22.5 mJ |
| Eoff | 56.3 mJ | 84.0 mJ |
| Eon + Eoff | 78.1 mJ | 106.5 mJ |
| Cies | 93 nF | 204 nF |
| Cres | 0.26 nF | 0.94 nF |
| td(off) | 959 ns | 1428 ns |
| tf | 216 ns | 511 ns |
VCE(sat) @ 300 A
DICIO1.40 V
Mitsubishi1.25 V
VEC @ 300 A
DICIO1.07 V
Mitsubishi1.13 V
Eon
DICIO21.8 mJ
Mitsubishi22.5 mJ
Eoff
DICIO56.3 mJ
Mitsubishi84.0 mJ
Eon + Eoff
DICIO78.1 mJ
Mitsubishi106.5 mJ
Cies
DICIO93 nF
Mitsubishi204 nF
Cres
DICIO0.26 nF
Mitsubishi0.94 nF
td(off)
DICIO959 ns
Mitsubishi1428 ns
tf
DICIO216 ns
Mitsubishi511 ns
Switching energy (mJ)
Switching Loss vs Frequency
Switching Frequency (kHz)
In the 4-5 kHz range where the PCS actually operates, per-switch loss is about DICIO 312-391 W vs Mitsubishi 426-533 W.
DICIO312 ~ 391 W
Mitsubishi426 ~ 533 W
A lower VCE(sat) does not always mean higher system efficiency.
For ESS PCS centred on 4-5 kHz and partial load, DICIO prioritised lower Eoff and switching loss over VCE(sat) in the design.
THERMAL & RELIABILITY
Lower loss leads to lower temperature and long-term reliability
Thermal result
600 kW · 1 Hour · identical cooling
DICIO
vsMitsubishi
Heatsink temperature
Module Case Temperature
−6.9 KHottest position CH2
−3.2 KAverage of 6 positions
0.032 K/WDICIO Rth(j-c)JESD51-14
POWER CYCLING
57,710 cyclesΔTj 100 K40 → 140℃ · 5 s / 5 s
AQG 324Passed against the standard
ΔRth +16%Criterion < 20%
ΔV(on) +3%Criterion < 5%
Lifetime Estimate
≈ 730,000 cyclesConverted to ΔTj 60 K
≈ 20 YearsModel estimate at 100 cycles per day
Model extrapolation based on a single test lot; this is not a guaranteed lifetime.
DROP-IN VALIDATION
Performance improved, the system unchanged
Kept as-is
IHM FootprintTerminal LayoutGate ConnectorGate DriveBusbarCoolingControl Parameters
Changed
Power Module OnlyDICIO DHM1200GC170LX1- Mixed DICIO / Mitsubishi PEBB operation
- S Phase ≤ 0.8 A
- T Phase ≤ 1.0 A
- Passed to SGSF criteria
Compare it directly in your own system
Based on your DC-link voltage, output, switching frequency and cooling conditions, we validate DICIO modules against your existing product in the same power stage.