Fuji Electric M629 EconoPACK Industrial IGBT Module Instruction Manual
- June 4, 2024
- Fuji Electric
Table of Contents
Fuji Electric M629 EconoPACK Industrial IGBT Module Instruction Manual
Scope of application
This document describes how to safely mount and use EconoPACKTM+ modules for the following part numbers.
- [V-series]
- 6MBI225V-120-50
- 6MBI300V-120-50
- 6MBI450V-120-50
- 6MBI550V-120-50
- 6MBI300V-170-50
- 6MBI450V-170-50
When handling the module, in addition to the contents described in this document, please check the Warning and Caution in the module’s specification too.
Mounting the module to heat sink
Surface conditions of heat sink
Design the heat sink so that the following surface conditions are satisfied. If the roughness and flatness do not satisfy the conditions, it may cause an increase in contact thermal resistance, or insulation failure due to package cracking.
- The surface roughness (Rz ) of the heat sink should be 10μm or less.
- The surface flatness of the heat sink should be within +50μm (-50μm) per 100mm, taking the straight line connecting the center points of the two screw mounting holes as reference. Here, “+” (plus) is defined when the heat sink has a convex shape, and “-” (minus) is defined when the heat sink has a concave shape. If both shapes exist, the sum of the absolute values of the maximum and minimum values should be 50μm or less.
Figure 1. Heat sink surface flatness and roughness
Application of thermal grease
It is recommended to apply thermal grease between the module’s base plate and the heat sink to ensure heat dissipation to the heat sink.
If the properties, amount, and application method of the thermal grease are not appropriate, it may result in poor heat dissipation and lead to thermal failure. Table 1 shows the recommended thermal grease properties and thickness. Assuming that the thickness is uniform, the required amount (weight) of thermal grease can be calculated from the following formula.
Thermal grease weight (g) x 10 = Thermal grease thickness (μm) x Base plate area of module (cm2) x Density of thermal grease (g/cm3 )
We recommend using the stencil mask method to control the appropriate thermal
grease thickness (Figure. 2). The recommended stencil mask pattern can be
provided upon request.
It is recommended to confirm that the thermal grease is spread over the entire
module’s base plate by removing the module after mounting and check the extent
of spreading.
|
Unit
|
Recommended value
---|---|---
Penetration (typ.)| –| >= 340
Thermal conductivity| W/m・K| >= 1
Thermal grease thickness| μm| 100 +/- 30
Figure 2. Thermal grease application
Screw fastening to heat sink
This section describes how to tighten the screws when mounting the module to heat sink.
- Use M5 screws to fix the module to heat sink.
- To fix the module with even force, first perform temporary tightening with 1/3 of the final tightening torque . Figure 3 shows the tightening sequence.
- Perform final tightening in the same sequence as temporary tightening. The final tightening torque should be within the range of 2.5~3.5Nm.
Figure 3. Tightening torque and tightening sequence
|
Tightening torque
|
Tightening sequence
---|---|---
Temporary tightening| 1/3 of the final tightening torque|
(1)→(2)→(3)→(4)→(5)→(6)→(7)→(8)
Final tightening| 2.5～3.5Nm| (1)→(2)→(3)→(4)→(5)→(6)→(7)→(8)
Main terminal connection
Bus bar connection
This section describes the conditions and precautions when connecting the module to bus bar.
- Screw size: M6
- Screw length: Bus bar thickness + (7 ~ 9mm)
- Tightening torque: 3.5 ~ 4.5Nm
Maximum allowable mechanical force when connecting to bus bar
The maximum allowable mechanical force when connecting the bus bar is shown in Figure 4. Do not exceed this value even for a moment.
Direction of force
|
**Maximum allowable force***
---|---
A| 5 Nm
B| 3 Nm
C| 500 N
D| 500 N
E| 5 Nm
F| 5 Nm
G| 500 N
H| 1000 N
Figure 4. Maximum allowable force for each direction
PCB mounting instruction
Soldering of PCB
The recommended soldering conditions for mounting a PCB on the module are
shown below.
Table 2. Recommended soldering conditions
|
Temperature
|
Time
---|---|---
Flow soldering| Pre heat: 125℃ max Post heat： 265℃ max| Post heat： 11s max
Hand soldering (by soldering iron)| 410℃ max| 5s max
Screwing fastening of PCB
This section describes the screwing method and precautions when mounting the PCB to the module.
- Use a self-tapping screw to fix the PCB to the module. As shown in Figure 5, use screws with a diameter of 2.4 to 2.6 mm and a length of 7.0 to 10.0 mm from the underside of the PCB.
- To fix the PCB with even force, first perform temporary tightening with 1/3 of the final tightening torque. Figure 6 shows the tightening sequence.
- Perform final tightening in the same sequence as temporary tightening. The final tightening torque should be within the range of 0.4±10% Nm.
＜Important notes＞
Manual screwing is recommended to avoid damage to the module. When using an
electric screwdriver, optimize the parameters such as tool selection and
tightening conditions. Check that the product is not damaged after tightening.
Also, the rotation speed should not exceed 300 rpm when screwing.Do not
tighten the screws in an tilted state as shown in Figure 7(a). It may
result in mechanical damage as shown in Figure 7(b).
Figure 6. Tightening torque and tightening sequence
| Tightening torque|
Tightening sequence
---|---|---
Temporary tightening| 1/3 of the final tightening torque|
(1)→(2)→(3)→(4)→(5)→(6)→(7)→(8)
Final tightening| 0.4±0.05 Nm| (1)→(2)→(3)→(4)→(5)→(6)→(7)→(8)
Figure 7. Poor example of screw tightening
Warning:
The contents in this manual (product specifications, characteristics, data,
materials, structure, etc.) are as of July 2022. The contents are subject to
change without prior notice due to changes in product specifications or for
other reasons. When using a product described in this manual, please obtain
the product’s latest specification and check the data.
This manual does not describe all applications and mounting conditions.
Therefore, it is necessary to evaluate under actual usage conditions and
confirm the mechanical characteristics, electrical characteristics, thermal
characteristics, lifetime, etc.
The order in which CONTENTS is described in this manual does not indicate the
order in which the products should be mounted. Please consider and decide the
installation process.
The applications described in this manual are illustrative of typical
applications using Fuji Electric’s semiconductor products. This manual do not
warrant or grant licenses for the enforcement of industrial property rights or
other rights.
Cautions
-
Transportation
Transport the carton box with the appropriate side facing up. Otherwise, the product may be subject to unexpected stress, which may result in bending of terminals, distortion in the resin package etc. Furthermore, throwing or dropping the product can cause significant damage to the product. If the product gets wet, it may lead to destruction or malfunction. Please take sufficient measures against rain and freezing. -
Storage
Please manage the storage location so that the temperature is 5 to 35oC and the humidity is 45 to 75%. Condensation may form on the surface of semiconductor devices when there are sudden temperature changes. Avoid such environment and store in a place where temperature changes are minimal. If more than a year has passed since the product was manufactured under these storage conditions, confirm that the terminal solderability is not deteriorated before mounting.
Avoid storing in a place where corrosive gas is generated or where there is a lot of dust. When storing, make sure that no external force or load is applied to the semiconductor device. Store the terminals of semiconductor devices in an unprocessed state. If the terminals are stored after the terminal is processed, soldering defects may occur when mounting the product due to rust. -
Assembly environment
The semiconductor device in the power module is very vulnerable to electrostatic discharge (ESD). If excessive static electricity is applied to the control terminal, the device might be destroyed. Take appropriate measures for ESD in the assembly environment within the scope described in the IGBT Module Application Manual (Chapter 3-2). -
Operating environment
If the product is used in an environment exposed to acids, organic substances, and corrosive gases (hydrogen sulfide gas, sulfuric acid gas, etc.), the product’s performance and appearance may deteriorate.