Quality control
Quality Policy
Quality Policy
To pursue excellent product quality and exceed customer expectation
Reliability Standards
We have been committed to providing customers with high-performance, high-reliability products that meet the following reliability requirements
Industrial Control Application Product Assessment Standards ( Discretes)
Rel itemFull nameReferenceConditionsRead-out 
HTRBHigh Temperature Reverse Bias TestJESD22-A108Tj=Tvjmax,VCE=80%VCEmax,VGE=0V1000h
HTGBHigh Temperature Gate Bias TestJESD22-A108Tj=Tvjmax,VCE=0V,VGE=VGEmax1000h
H3TRBHigh Humidity High Temperature Reverse BiasJESD22-A110Ta=85°C,RH=85%,VCE=80%VCEmax up to 100V,VGE=0V1000h
IOL Intermittent Operational Life

MIL-STD-750

ton=5min,toff=5min,  △Tj=100°C,Tjmax=Tvjmax3000cycles/
TCTemperature CycleJESD22-A10455°Cto 150°C,Dwell≥15min,1000cycles/

Mapping and Assessment Criteria for Vehicle-Gauge Application Products (Module)

Rel itemFull nameReferenceConditionsRead-out 
HTRBHigh Temperature Reverse Bias TestXCZ-QW-PE-02Tj= Tjmax in datasheet,Vds = 80% BV rating,VGE=0V

168hr

500hr

1000hr

HTGBHigh Temperature Gate Bias TestGB/T 29332-2012Tj= Tjmax in datasheet,Vge= 100% VGS rating,VCE=0V

168hr

500hr

1000hr

H3TRBHigh Humidity High Temperature Reverse BiasJESD22-A110Ta=85℃,85%RH,VCE =80V 

168hr

500hr

1000hr

TC 

Temperature Cycle

JESD22-A104

-40℃/30min~125℃/30min,1000cycle

168hr

500hr

1000hr

PCsec

Power Cycle second

IEC 60749-34:2011

AQG-324 

ΔTj=100℃,Tvjmax=150℃,ton/toff=5sec/5sec

50000 cycles

50000 cycles
PCminPower Cycle minutes

IEC 60749-34:2011 

AQG-324

Tvj=Tvjopmax,Iload>=0.85Irate,ΔTc=100℃

Ton<=1.5min,Toff<=4.5min,20000 cycles

20000 cycles
MV VibrationIEC 60068-2-6

 1. sinusoidal vibration(6G): 100Hz , 30m/s2 200Hz , 60m/s2 440Hz , 60m/s2     

2. wide-band ramdom vibration(10G): 10Hz - 2000Hz, 96.6m/s2 3. 22h for each spatial axis

22h for each spatial axis



Customer Service
7*24 hours response service system

Marching Power has always valued customer opinions and is committed to providing fast and high quality after-sales service to all of our customers in China. We guarantee a smooth and dedicated feedback channel for customers' opinions; we guarantee 24h time-sensitive opinion evaluation and feedback, as well as coordinated R&D teams to fully support customers' needs; and we guarantee a specific quality control process to deal with product quality issues. Core Long March insists on listening to customers' voices and meeting their diversified needs with high quality services.

Customer Withdrawal Processing Process Specifications
Customer Withdrawal Processing Process Specifications