HRS BM20 Series User manual

Molded Bottom
surface structure
Molded Bottom
surface structure
2-pointcontact
structure
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Vaccum pick-up
1
0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
BM20 Series
2013.11②
■Features
1. High density mounting capability
A space saving design that keeps the connector
compact, but still maintains an adequate vacuum
area (no less than 0.7mm wide).
Depth DS: 2.3 mm DP: 1.78 mm
2. Reliable contact performance
Even though the mated height is low, the BM20 still
leads it class in maximum effective mating lengths
for each mating height.
<Effective Mating Length>
Height 0.8 mm: 0.2 mm
Height 0.6 mm: 0.15 mm
The addition of the two point contact system adds
more reliability to the contacts.
3. No restrictions to PCB pattern design
for the 0.8 mm height connector*1
This series utilizes a thin wall to insulate the
bottom surface of the connector and maintains an
effective mating length of 0.2 mm. This removes
any restriction for PCB pattern layout design
under the connector.
Note *1: There are some restrictions for the 0.6
mm height style.
4. Enhanced mating operations
The structure uses guide ribs to ease the mating
process and offers a self alignment range of up to
0.3 mm. A clear tactile click is used as an
indicator to the user that the mating process was
completed.
5. Drop and shock resistant structure
Dimples were designed into the contacts to
increase their retention force and to absorb the
shock delivered from a drop or other impact.
6. Debris resisting design
When mated, the connector’s design covers the
contacts which help to keep dust and other debris
away from the contacts. The SMT leads are kept
very close to the connector housing which also
helps to prevent shorts caused by debris on the
exposed contacts
BM20 Existing products
2.98 ∞ 10.4
=About 31.0mm2
2.3 ∞ 10.48
= About 24.1mm2
2.98mm
2.3mm
10.4mm
Existing products BM20
10.48mm
A 22.3%
reduction
in size!
BM20 Existing products
Board occupied area
2.46 ∞ 9.32
= About 22.9mm2
1.78 ∞ 9.4
= About 16.7mm2
A 27.1%
reduction
in size!
2.46mm
1.78 mm
Existing products BM20
9.32mm
9.4mm
■Receptacle
Mating diagram (cross section)
■Header
H=0.8
H=0.6
In cases where the application will demand a high level of reliability, such as automotive,
please contact a company representative for further information.
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

2
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
■Product Specifications
Ratings
Rated Current 0.3A Operating
Temperature Range
- 35 〜85°C
(Note 1)
Storage Temperature
Range
- 10 〜60°C
(Note 2)
Rated Voltage AC, DC 30V Operating Humidity
Range 20 〜80％Storage Humidity
Range
40 〜70%
(Note 2)
Items Specifications Conditions
1. Insulation Resistance Minimum of 50 Mø Measured with DC 100 V
2. Withstanding Voltage No flashover or breakdown Apply AC 100 V for 1 minute
3. Contact Resistance Maximum of 100 mø Measured with AC 20 mV, 1 kHz and 1 mA
4. Vibration Resistance No electrical discontinuity of 1µs or greater Frequency 10-55 Hz, half amplitude 0.75 mm, 3
directions for 2 hours
5. Humidity Resistance Contact resistance Maximum of 100 mø
Insulation resistance Minimum of 25 mø
Left at temperature 40±2ç, humidity 90 to 95%,
96 hours
6. Temperature Cycles Contact resistance Maximum of 100 mø
Insulation resistance Minimum of 50 mø
(-55°C: 30 minutes →5~35ç: 10 minutes →85°C: 30
minutes →5~35ç: 10 minutes) 5 cycles
7. Durability Contact Resistance: maximum of 100 mø 10 mating cycles
8. Soldering Heat
Resistance
Should be no melting of resin parts that affects
its performance
Reflow: according to the Recommended Solder Profile
Hand solder: Soldering iron temperature 350°C, no
more than 3 seconds.
Note 1: Includes temperature rise caused by current flow.
Note 2: The term "storage" here refers to products stored for a long period prior to board mounting and use. The operating
temperature and humidity range covers the non-energized condition of connectors after board mounting and the
temporary storage conditions during transportation, etc.
■Materials
Product Component Materials Finish UL Regulation
Receptacle Insulator LCP Black UL94V-0
Header Contact Phosphorous bronze Gold plating ----------------------
■Product Number Structure
Refer to this page when determining product specifications by model types. Please place orders with part numbers listed in
this catalog. The characteristics and specifications of the product described in this catalog are reference values. Please
make sure to check the latest delivery specifications at the time of product use.
●Receptacle/Header
❶Series Name: BM
❷Series No.: 20
❸Shape Symbols
B: With reinforcing metal fitting
JC: Connector for conductivity testing
❹Stack height: 0.6 mm, 0.8 mm
❺No. of Contacts:
❻Connector Type
DS: Double row receptacle
DP: Double row header
❼Contact Pitch: 0.4 mm
❽Terminal Shape V: Vertical SMT
❾Packaging
(51): Embossed tape package (8,000 pieces per reel)
BM 20 # (**)−*DS − 0.4 V (51)
❶ ❷❸ ❹ ❺❻ ❼❽ ❾
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

3
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
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■H=0.6 mm receptacle
■H=0.8 mm receptacle
BRecommended PCB layout【H= 0.6 mm】
BRecommended PCB layout【H= 0.8 mm】
Resist
coating area
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

4
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
Unit:mm
Part No. HRS No. No. of Contacts A B C D
BM20B(0.6)-10DS-0.4V(51) CL0684-9308-8-51 10 4.48 1.6 4.02 4.06
BM20B(0.6)-20DS-0.4V(51) CL0684-9309-0-51 20 6.48 3.6 6.02 6.06
BM20B(0.6)-24DS-0.4V(51) CL0684-9310-0-51 24 7.28 4.4 6.82 6.86
BM20B(0.6)-30DS-0.4V(51) Under planning 30 8.48 5.6 8.02 8.06
BM20B(0.6)-34DS-0.4V(51) Under planning 34 9.28 6.4 8.82 8.86
BM20B(0.6)-40DS-0.4V(51) CL0684-9313-8-51 40 10.48 7.6 10.02 10.06
Part No. HRS No. No. of Contacts A B C
BM20B(0.8)-10DS-0.4V(51) CL0684-9008-4-51 10 4.48 1.6 4.02
BM20B(0.8)-20DS-0.4V(51) CL0684-9009-7-51 20 6.48 3.6 6.02
BM20B(0.8)-24DS-0.4V(51) CL0684-9010-6-51 24 7.28 4.4 6.82
BM20B(0.8)-30DS-0.4V(51) CL0684-9011-9-51 30 8.48 5.6 8.02
BM20B(0.8)-34DS-0.4V(51) CL0684-9020-0-51 34 9.28 6.4 8.82
BM20B(0.8)-40DS-0.4V(51) CL0684-9012-1-51 40 10.48 7.6 10.02
BM20B(0.8)-44DS-0.4V(51) Under planning 44 11.28 8.4 10.82
BM20B(0.8)-50DS-0.4V(51) Under planning 50 12.48 9.6 12.02
Note 1: This product is sold by full reel quantities of 8,000 pieces per reel. Please place orders in full reel quantities.
Note 2: This connector is NOT polarized.
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BRecommended metal mask size (Mask thickness 100 µm)【0.6 mm and 0.8 mm common】
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

5
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
;¤%#%' %#)¤%#%'
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0.15
0.66
P=0.4
1.78
0.4F
0.4
E
■H=0.6 mm header
■H=0.8 mm header
BRecommended PCB layout【0.6 mm and 0.8 mm common】
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BRecommendedmetalmasksize(Maskthickness100μm)【0.6mmand0.8mmcommon】
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

6
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
Unit:mm
Part No HRS No. No. of Contacts E F
BM20B(0.6)-10DP-0.4V(51) CL0684-9300-6-51 10 3.4 1.6
BM20B(0.6)-20DP-0.4V(51) CL0684-9301-9-51 20 5.4 3.6
BM20B(0.6)-24DP-0.4V(51) CL0684-9302-1-51 24 6.2 4.4
BM20B(0.6)-30DP-0.4V(51) Under planning 30 7.4 5.6
BM20B(0.6)-34DP-0.4V(51) Under planning 34 8.2 6.4
BM20B(0.6)-40DP-0.4V(51) CL0684-9305-0-51 40 9.4 7.6
Part No HRS No. No. of Contacts E F
BM20B(0.8)-10DP-0.4V(51) CL0684-9001-5-51 10 3.4 1.6
BM20B(0.8)-20DP-0.4V(51) CL0684-9002-8-51 20 5.4 3.6
BM20B(0.8)-24DP-0.4V(51) CL0684-9003-0-51 24 6.2 4.4
BM20B(0.8)-30DP-0.4V(51) CL0684-9004-3-51 30 7.4 5.6
BM20B(0.8)-34DP-0.4V(51) CL0684-9019-0-51 34 8.2 6.4
BM20B(0.8)-40DP-0.4V(51) CL0684-9005-6-51 40 9.4 7.6
BM20B(0.8)-44DP-0.4V(51) Under planning 44 10.2 8.4
BM20B(0.8)-50DP-0.4V(51) Under planning 50 11.4 9.6
Note 1: This product is sold by full reel quantities of 8,000 pieces per reel. Please place orders in full reel quantities.
Note 2: This connector is NOT polarized.
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

7
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
J±0.3
K±0.1 1.75±0.1
4±0.14±0.1 2±0.1
L±0.1
M±0.15
+0.1
0
Ø1.5
GG
H
H
Unreeling Direction
G-G (5:1)
H-H
N±0.5
P±1
Ø380±2
Ø80±1
2±0.5
Ø1.5 holes
for feed
mechanism
Ø13±0.2
Ø21±0.8
120˚
120˚
Product label
BEmbossed CarrierTape Dimensions (JIS C 0806 compliant)
●Receptacle ●Reel Condition Dimensions
Unit:mm
Part No. J K L M N P
BM20B(0.8)-10DS-0.4V(51) 16 7.5 0.3 1 17.5 21.5
BM20B(0.8)-20DS-0.4V(51) 16 7.5 0.3 1 17.5 21.5
BM20B(0.8)-24DS-0.4V(51) 16 7.5 0.3 1 17.5 21.5
BM20B(0.8)-30DS-0.4V(51) 24 11.5 0.3 1 25.5 29.5
BM20B(0.8)-34DS-0.4V(51) 24 11.5 0.3 1 25.5 29.5
BM20B(0.8)-40DS-0.4V(51) 24 11.5 0.3 1 25.5 29.5
BM20B(0.8)-44DS-0.4V(51) 24 11.5 0.3 1 25.5 29.5
BM20B(0.8)-50DS-0.4V(51) 24 11.5 0.3 1 25.5 29.5
Unit:mm
Part No. J K L M N P
BM20B(0.6)-10DS-0.4V(51) 16 7.5 0.25 0.8 17.5 21.5
BM20B(0.6)-20DS-0.4V(51) 16 7.5 0.25 0.8 17.5 21.5
BM20B(0.6)-24DS-0.4V(51) 16 7.5 0.25 0.8 17.5 21.5
BM20B(0.6)-30DS-0.4V(51) 24 11.5 0.25 0.8 25.5 29.5
BM20B(0.6)-34DS-0.4V(51) 24 11.5 0.25 0.8 25.5 29.5
BM20B(0.6)-40DS-0.4V(51) 24 11.5 0.25 0.8 25.5 29.5
Unit:mm
Part No. S T U V W Y
BM20B(0.6)-10DP-0.4V(51) 12 5.5 0.25 0.65 13.5 17.5
BM20B(0.6)-20DP-0.4V(51) 16 7.5 0.25 0.65 17.5 21.5
BM20B(0.6)-24DP-0.4V(51) 16 7.5 0.25 0.65 17.5 21.5
BM20B(0.6)-30DP-0.4V(51) 16 7.5 0.25 0.65 17.5 21.5
BM20B(0.6)-34DP-0.4V(51) 24 11.5 0.25 0.65 25.5 29.5
BM20B(0.6)-40DP-0.4V(51) 24 11.5 0.25 0.65 25.5 29.5
Unreeling Direction
R-R
Q-Q
U±0.1
V±0.15
S±0.3
T±0.1 1.75±0.1
4±0.14±0.1
+0.1
0
Ø1.5
2±0.1
QQ
R
W±0.5
Y±1
Ø380±2
Ø80±1
2±0.5
Ø1.5 holes
for feed
mechanism
Ø13±0.2
Ø21±0.8
120˚
120˚
Product label
BEmbossed CarrierTape Dimensions (JIS C 0806 compliant)
●Header ●Reel Dimensions
Unit:mm
Part No. S T U V W Y
BM20B(0.8)-10DP-0.4V(51) 12 5.5 0.3 0.88 13.5 17.5
BM20B(0.8)-20DP-0.4V(51) 16 7.5 0.3 0.88 17.5 21.5
BM20B(0.8)-24DP-0.4V(51) 16 7.5 0.3 0.88 17.5 21.5
BM20B(0.8)-30DP-0.4V(51) 16 7.5 0.3 0.88 17.5 21.5
BM20B(0.8)-34DP-0.4V(51) 16 7.5 0.3 0.88 17.5 21.5
BM20B(0.8)-40DP-0.4V(51) 24 11.5 0.3 0.88 25.5 29.5
BM20B(0.8)-44DP-0.4V(51) 24 11.5 0.3 0.88 25.5 29.5
BM20B(0.8)-50DP-0.4V(51) 24 11.5 0.3 0.88 25.5 29.5
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

8
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
BOperating Precautions
1. Recommended Solder Profile
2. Recommended hand solder
conditions
The temperature of the soldering iron should fall within the range of 340 ±10°C and
should not make contact for longer than 3 seconds
3. Recommended screen
thickness: Opening ratio
(pattern area ratio)
Thickness: 0.1 mm
Opening ratio: DS side 70% DP side 80%(H=0.8mm)
DP side 70%(H=0.6mm)
4. Leaning of PCB Maximum of 0.02 mm at the center of connector (using both edges of connector as
criteria)
5. Washing Cleaning is not recommended for this connector. Cleaning agents can deteriorate the
mechanical operation and the environmental resistance of this connector.
6. Precautions ■Do not mate or unmate these connectors until they are mounted, failure to follow
this precaution can lead to deformation or damage to these connectors.
■Provide another form of support to the PCB, this connector was not designed to be
the main form of support.
■Using excessive force to mate or unmate this connector can damage the contacts.
■Do not apply excessive amounts of flux as it may cause the solder and flux to wick.
■There may be a slight variance in the color of the molding between production lots,
this variance will not affect the performance of the connector.
■Refer to the next page for the handling precautions when mating and unmating the
connectors.
■If the connector becomes disconnected due to impact, a fall or a counterforce to
the FPC, it may be necessary to hold the connector in place with an addition to the
device’s case or other cushioning material to hold the connector in place.
[Applicable Conditions]
1. Peak temperature: 250°C peak
2. Heating parts: 220°C or above, within 60 seconds
3. Preheating parts: 150 to 180°C, 90 to 120 seconds
4. Number of times: Maximum of 2 reflow cycles
(Note 1)The temperatures mentioned above refer to the PCB surface temperature
near the connector leads.
(Note 2)When using nitrogen reflow please implement 1,000 [ppm] or higher oxygen
density.
Please contact the sales representative of our company in case of less than 1,000 [ppm].
50
Maximum of
60 seconds
100
150
200
250
Heating time(sec.)
Temperature(ç)
0100 150 200 25050
Normal
temperature
300
90 to 120 seconds
180ç
250ç
220ç
150ç
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9
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
●Handling precautions when mating
Prior to mating, locate the guidance ribs and align the
header. Do not apply excessive force during the mating
process as it may damage the contacts.
Make sure that the connector is parallel to the other
side, then press it down until it is fully mated while
maintaining the angle.
7B'%"9H"%#)K
7B'%"9E"%#)K
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10
BM20 Series●0.4 mm Pitch, 0.6 and 0.8 mm Height, Board-to-Board and Board-to-FPC Connectors
●Handling precautions for unmating
To unmate this connector, lift evenly across the header.
Make sure that each side of the connector stays parallel
to the other.
If circumstances prevent the connectors from staying
parallel to each other, then one side may be lifted as
shown in the diagram. This method is only approved if
the connector is mounted onto an extremely rigid circuit
board. If the board were to warp during this process
it may result in damage to the connector or its solder
joints.
Do not try to disconnect these connectors by pulling
on one side or a single corner, or to unmate it when
it is hasn’t been securely mounted onto a rigid FPC.
These actions may lead to deformities and ultimately
a damaged connector. Prior to the mounting of these
connectors we recommend that you check the rigidity of
your FPC to ensure that it meets the standards needed
to support these connectors.
If the FPC is not strong enough by itself, a stiffening
backing may be applied. If the FPC has a low rigidity
the connector may break (as shown in the illustration to
the left).
We recommend a backing of no less than 0.3 mm of
glass epoxy and 0.2 mm of stainless material.
BM20*(#)-*DS-0.4V
BM20*(#)-*DP-0.4V
Pitch direction
Corner direction
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.