1. No category

0.25 mm Pitch Ultra-low Profile
FPC Back-lock Connector
FF28 Series【Upper Contact】
OUTLINE
The FF28 connector series utilizes a cable lock mechanism
to provide positive retention of the FPC. This LIF connector
has a dedicated upper contact to interface with the FPC at a
0.25mm pitch. The ultra-low profile connector has a 0.66mm
height, making it one of the smallest board mounted FPC LIF
connectors on the market.
FEATURE
・DDK’s original cam-type back-lock system provides reliable operation and ensures retention
from inadvertent upward pulling of the FPC.
・The FF28 connector has an ultra-low height of 0.66mm.
・ Each individual contact is rated to 0.2A current.
・ The FPC is mechanically retained within the FF28 with DDK’s cable-lock design.
・These ZIF connectors are delivered with the lock lever opened for maximum production efficiency.
・Contacts utilize a nickel barrier to prevent solder wicking.
・The housing and lock lever are made of heat-resistant resin making possible lead-free reflow soldering.
・FF28 ZIF connectors are delivered in a tape and reel package for automated machine processes.
Note : Please do not close the lock lever without inserting the FPC.
Since cable lock tabs electrify next contacts, please do not use the cable lock tabs as ground tabs.
APPLICATIONS
Mobile phone, notebook PC, PDA, other Portable devices
SPECIFICATIONS
Rated Voltage
50V AC (r.m.s.)
Rated Current
0.2A / Contact
Dielectric Withstand Voltage
200V AC (r.m.s.) / 1 minute
Insulation Resistance
50 M Ω min. at 250V DC
Contact Resistance
80m Ω max.
MATERIAL/FINISH
Item
141212
RoHS
Compliant
Compliant
Material / Finish
Conatct
Copper Alloy / Au (Flash) over Ni
Housing
LCP Resin (UL94V-0) / Ivory
Lock lever
PPS Resin (UL94V-0) / Black
◎ Specifications and/or dimensions in this catalog are subject to change without notice.
Please varify the latest specifications with our drawings.
http://www.ddknet.co.jp
Unit：mm
FF28 Series
○ 0.25mm Pitch FPC Connector【Upper Contact】
FF28- □□ A- R 11A-3H
①
②
③
④ ⑤ ⑥ ⑦
⑧
① Series
FF28
② Number of Contact
Refer to th table 1
③ Contact Position
A：Upper Contact
Applicable PCB Thickness：0.12±0.03mm
④ Contact Style
R： Right Angle
⑤ Contact Tail Length
1：0.45mm　/　0.3mm
⑥ Contact Plating
1：Au (Flash) over Ni
⑦ Lock Lever Style
A： Standard
奇数芯数の場合(Applicable for the odd number contacts)
⑧ Material
3H： Halogen Free
Dimensions
Odd Number of
Contact
A
B
C±0.07
0.25±0.07
Cable Lock Tab
No.1 Contact
D
X
B
C
0.50
Cable Lock Tab
No.(n) Contact
0.10±0.03
0.20 X
No.(n) Contact
0.45
0.42
（0.05）
3.35
0.30
0.35
（0.05）
No.1 Contact
3.80
3.45
0.70 max.
（1.40）
1.45
1.75
(1.57)
（FPC Insertion Depth）
Cable Lock Tab
No.(n-1) Contact
0.10±0.03
0.20 X
0.10±0.03
0.20 X
Cable Lock Tab
No.2 Contact
0.48
0.25
0.50
奇数芯数の場合
Recommended P.C.B Pattern lay-out
Recommended PCB
Mounting Dimensions
Recommended
Applicable for
FPCDimensions
recommended dimension
FPC
0.30±0.02
0.48±0.03
No.(n-1) Contact
Cable Lock Tab
E±0.05
C±0.03
0.73±0.07
0.45±0.05
0.50±0.02
0.25±0.02
0.50±0.03
No.(n) Contact
C±0.03
Mating Side
1.50 min.
2.40±0.03
(3.65）
0.30±0.02
No.1 Contact
0.55±0.03
Pattern Prohibition
Area
R 0.20
R 0.15
0.50 min.
.20
R0
Connector
Location
（0.30 min.)
0.73±0.07
0.45±0.05
Check Mark（0.07）
0.075±0.02
0.15±0.02
0.27±0.03
0.15±0.02
No.1 Contact
R 0.15
R 0.15
0.12±0.03
2.00 min.
Lock Lever
1.40±0.10
1.30±0.10
1.05±0.10
0.75±0.10
0.65±0.10
0.50±0.10
0.30±0.10
0.20 min.
0.50±0.03
0.25±0.03
0.48±0.03
No.2 Contact
Cable Lock Tab
0.70±0.03
Contacts are arranged
zigzag on from No.1 contact.
0.72±0.05
1.17±0.05
No.1端子を基準に千鳥に配列。
（Shall be located zig zag from No.1 contacts.）
Stiffener
No.(n) Contact
奇数芯数の場合（Applicable for the odd number contacts)
0.48±0.03
0.30±0.02
No.(n) Contact
Cable Lock Tab
0.73±0.07
20.45±0.05
E±0.05
C±0.03
Check Mark（0.07）
.20
R0
Connector
Location
Lock Lever
0.50±0.02 0.27±0.03
0.73±0.07
0.45±0.05
±0.05
±0.05
0.50±0.03
0.25±0.03
0.48±0.03
No.2 Contat
Cable Lock Tab
±0.10
±0.10
±0.10
±0.10
±0.10
±0.10
±0.10
以下
http://www.ddknet.co.jp
0.70±0.03
◎ Specifications and/or dimensions in this catalog are subject to change without notice.
Please varify the latest specifications with our drawings.
0.12±0.03
偶数芯数の場合(Applicable for the even number contacts)
Unit：mm
FF28 Series
○ 0.25mm Pitch FPC Connector【Upper Contact】
（FPC Insertion
Depth）
Even Number of
Contacts
A
B
C±0.07
0.70 max.
（1.40）
1.45
1.75
(1.57)
Dimensions
3.80
3.45
0.25±0.07
奇数芯数の場合
Recommended P.C.B Pattern lay-out
Applicable for FPC recommended dimension
0.30±0.02
0.50±0.03
No.(n-1) Contact
C±0.03
Mating Side
Part Number
FF28- 5A-R11A-3H
Number of
Contact
2.00 min.
0.50 min.
R 0.20
R 0.15
0.50 min.
0.075±0.02
0.15±0.02
0.15±0.02
0.27±0.03
No.1 Contact
Table−1
偶数芯数の場合
（Applicable for the Even number contacts)
0.50±0.02 0.27±0.03
0.25±0.02
(3.65）
2.40±0.03
No.1 Contact
0.55±0.03
（0.30 min.)
Pattern Prohibition
Area
.20
R0
Connector
Location
1.40±0.10
1.30±0.10
1.05±0.10
0.75±0.10
0.65±0.10
0.50±0.10
0.30±0.10
0.20以下
Cable Lock Tab
0.73±0.07
0.45±0.05
1.50 min.
No.(n) Contact
E±0.05
C±0.03
0.73±0.07
0.45±0.05
Check Mark（0.07）
0.70±0.03
0.48±0.03
0.30±0.02
Stiffener
No.(n) Contact
Recommended
FPC Dimensions
Contacts are arranged
zigzag from No.1 contact.
Lock Lever
R 0.15
R 0.15
0.12±0.03
奇数芯数の場合（Applicable for the odd number contacts)
Recommended PCB
Mounting Dimensions
0.50±0.03
0.25±0.03
0.48±0.03
No.2 Contat
Cable Lock Tab
R 0.20
R 0.15
偶数芯数の場合（Applicable for the Even number contacts)
R 0.15
R 0.15
No.(n) Contact
A
B
C
D
E
5
3.50
1.96
1.00
2.51
2.46
FF28- 8A-R11A-3H
8
4.25
2.71
1.75
3.26
3.21
FF28-12A-R11A-3H
12
5.25
3.71
2.75
4.26
4.21
FF28-15A-R11A-3H
15
6.00
4.46
3.50
5.01
4.96
FF28-20A-R11A-3H
20
7.25
5.71
4.75
6.26
6.21
FF28-30A-R11A-3H
30
9.75
8.21
7.25
8.76
8.71
FF28-35A-R11A-3H
35
11.00
9.46
8.50
10.01
9.96
FF28-41A-R11A-3H
41
12.50
10.96
10.00
11.51
11.46
FF28-45A-R11A-3H
45
13.50
11.96
11.00
12.51
12.46
◎ Specifications and/or dimensions in this catalog are subject to change without notice.
Please varify the latest specifications with our drawings.
http://www.ddknet.co.jp
3
0.12±0.03
2.00 min.
C±0.03
Mating Side
0.075±0.02
0.15±0.02
0.27±0.03
0.15±0.02
0.72±0.05
1.17±0.05
0.50±0.03
0.48 Contact
No.(n)
0.25
0.50
0.50±0.02
0.25±0.02
Cable Lock tab
No.(n) Contact
No.1 Contact 0.10±0.03
0.20 Y
0.10±0.03
0.20 Y
0.55±0.03
0.30±0.02
0.73±0.07
0.45±0.05
0.42
（0.05）
Cable lock Tab
No.2 Contact
No.1 Contact
E±0.05
C±0.03
1.50 min.
1.40±0.10
1.30±0.10
1.05±0.10
0.75±0.10
0.65±0.10
0.50±0.10
0.30±0.10
0.20 min.
0.70±0.03
0.45
Pattern Prohibition
Area
（0.30 min.)
2.40±0.03
(3.65）
3.35
Connector
Location
0.73±0.07
0.45±0.050.10±0.03
0.20 Y
Check Mark（0.07）
No.(n-1) Contact
.20
R0
0.50
0.48±0.03
No.1 Contact
No.(n-1) Contact
0.30±0.02
Cable Lock Tab
0.30
Lock Lever
B
C
0.72±0.05
1.17±0.05
Y
0.50±0.03
0.25±0.03
0.48±0.03
No.2 Contact
Cable Lock Tab
Cable Lock Tab
No.(n) Contact
D
0.35
（0.05）
No.1端子を基準に千鳥に配列。
（Shall beCable
located zigLock
zag fromTab
No.1 contacts.）
No.1 Contact
Stiffener
Unit：mm
FF28 Series
B max.
○ Packing Specifications
D
D
C
B max.
C
■ Reel Dimensions
φ80
User Direction of Feed
φ80
φ328
φ328
User Direction of Feed
400mm min.
400mm min.
Tailer： 30 pockets min.
4000 pockets
Leader： 15 pockets min.
Empty components pockets
Empty components pockets
sealed with cover tape.
sealed with cover tape.
Tailer： 30 pockets min.
Leader： 15 pockets min.
4000 pockets
User Direction of Feed
Empty components pockets
Empty components pockets
sealed with cover tape.
sealed with cover tape.
User Direction of Feed
8.00
+0.10
φ1.50 0
Section CーC
FF28- 5A-R11A-3H
G±0.30
F min.
G±0.30
C
（1.84） CーC
Section
Part Number
E
（A）
（1.84）
F min.
4.00
2.00
（A）
C
+0.10
φ1.50 0
1.75
C
8.00
1.75
4.00
2.00
E
■ Emboss Tape Dimensions
Detail
C
Number of
Contact
A
5
3.80
FF28- 8A-R11A-3H
8
4.55
FF28-12A-R11A-3H
12
5.55
FF28-15A-R11A-3H
15
6.30
FF28-20A-R11A-3H
20
7.55
FF28-30A-R11A-3H
30
10.05
FF28-35A-R11A-3H
35
11.30
FF28-41A-R11A-3H
41
12.80
FF28-45A-R11A-3H
45
13.80
B
Detail
C
D
E
F
G
22.4
16.4
13.5
7.5
14.25
16.0
30.4
24.4
21.5
11.5
22.25
24.0
■ Quantity：4000pcs. / Reel
◎ Specifications and/or dimensions in this catalog are subject to change without notice.
Please varify the latest specifications with our drawings.
http://www.ddknet.co.jp
4
FF28　Series
単位：mm
○ Operating Instruction and Cautions
Lock lever is opened when delivery.
1．Connector mounting Instruction
・Connectors are delivered with the lock lever opened.
You do not have to operate the lock lever before inserting FPC.
（picture ①）
・Please do not re-flow with the lock lever in the closed condition.
picture ①
・Please do not close the lock lever without inserting FPC.
Otherwise, the contact gap will become narrower and FPC insertion
force will rise.（picture ②）
・Please do not load from the top of the lock lever.（figure ①）
And please do not load toward the opposite direction of the lock lever.（figure ②）
Otherwaise, the lock lever may be broken or contacts may be deformed.
0.25N×Pin 以上
0.25N×Pin 以上
figure ①
figure ②
・Please do not insert finger nail into the entry
as it may damage the connector（figure ③）
図③
◎このカタログの仕様等は、改良等で予告なく変更することがありますので、ご了承願います。
また、掲載している製品の特性､ 及び仕様は参考値です｡ 製品を使用する際は、最新の納入仕様書で内容のご確認をお願い致します。
http://www.ddknet.co.jp
5
FF28　Series
単位：mm
○ Operating Instructions and Cautions
Cable lock tabs conduct to both ends of contacts.
Please do not ground the cable lock tab pad on the mounting board.（figure ④）
Cable Lock Tab
Contact
Connector
Cable Lock Tab pad
Please do NOT ground
FPC
P.C.B(mounting side)
Cable Lock Tab
Contact
Contact pad
The cable lock tab is connected to
the adjacent contact.
figure ④
◎このカタログの仕様等は、改良等で予告なく変更することがありますので、ご了承願います。
また、掲載している製品の特性､ 及び仕様は参考値です｡ 製品を使用する際は、最新の納入仕様書で内容のご確認をお願い致します。
http://www.ddknet.co.jp
6
FF28　Series
単位：mm
○ Operating Instruction and Cautions
2．FPC Insertion
Please insert the FPC with the pattern side up.(correct: picture ② , wrong：picture ③）
・Please insert the FPC straight into the connector.
Due to the semi-retaining mechnism, some insertion force is
necessary when inserting FPC.
FPC insertion is completed when the edges of the FPC are
touching connector frange.
Stiffener side
Pattern side
NG
picture ③
picture ②
3．Correct FPC Insertion Position
・Check line enables a visual verification of the mating position.
It prevents shallow and diagonal insertion.（picture ⑤、⑥、⑦）
FPC frange
picture ⑤：Standard insertion
picture ⑥：Shallow insertion
picture ⑦：Diagonal insertion
・If cable lock tabs catch the FPC correcty, FPC patterns are not dislocated from contacts.
◎このカタログの仕様等は、改良等で予告なく変更することがありますので、ご了承願います。
また、掲載している製品の特性､ 及び仕様は参考値です｡ 製品を使用する際は、最新の納入仕様書で内容のご確認をお願い致します。
http://www.ddknet.co.jp
7
FF28　Series
単位：mm
○ Operating Instruction and Cautions
4．Closing Lock Lever
・Please rotate down the lock lever until firmly closed.(picture ④ )　そ Please do not load excessive force on the housing.(picture ⑤ )
3N Min.
picture ④
picture ⑤
・Please do not close the lock lever by tip of finger nail.（picture ⑥）
・Please hold the lock lever at least half width of it.（picture ⑦）
半分以上の幅を押すこと
picture ⑥
picture ⑦
◎このカタログの仕様等は、改良等で予告なく変更することがありますので、ご了承願います。
また、掲載している製品の特性､ 及び仕様は参考値です｡ 製品を使用する際は、最新の納入仕様書で内容のご確認をお願い致します。
http://www.ddknet.co.jp
8
FF28　Series
単位：mm
○ Operating Instruction and Cautions
5．Removing FPC
・Please lift the lock lever by flipping up in the direction of arrow.（picture ⑧）
Please do not load excessive force on the lock lever.(picture ⑨）
OK
NG
picture ⑧
picture ⑨
0.25N×pin
6．Others
・In case of hand soldering, please do not heap excesssive solder on the contact tails.
(above terminal 0.05mm max.)(figure ⑧）
0.05mm 以下
figure ⑧
7．ESD(Electrostatic Discharge)
・This connector does not protect the circuit from ESD.
8．Disposal of connector
・Please dispose the connector as industrial waste.
◎このカタログの仕様等は、改良等で予告なく変更することがありますので、ご了承願います。
また、掲載している製品の特性､ 及び仕様は参考値です｡ 製品を使用する際は、最新の納入仕様書で内容のご確認をお願い致します。
http://www.ddknet.co.jp
9