XH2 Half-pitch Board-to-Board Connectors
1
Allows High-density Mounting for
Electronic Devices. A Half-Pitch
Connector with a 1.27-mm Pitch for
Compactness.
■A pitch of 1.27 mm for high-density mounting of
double-row arrangements.
■A quadruple-row staggered arrangement (1.27
mm x 1.905 mm) for board connection.
■Leaf contact construction enables smooth mating
and resistance to bending.
■Space saving mating length of 3.1 mm.
■Press fitting assures long-term contact quality.
The gold/palladium plating has been improved for
better contact reliability.
■A special finish improves flux resistance (Straight
Terminals only). Also it has fastening pins to stan-
dardize all the contacts.
■Can be mounted to boards with screws.
■The XH2 conforms to UL standards (file no.
E103202).
■Not mated with XH3 and XH4 Half-pitch Connec-
tors.
■Ratings and Characteristics
Note: The contact resistance is for the XH2A-@@42 combined
with the XH2B-@@41.
■Materials and Finish
RoHS Compliant
Rated current 0.5 A
Rated voltage 125 VAC
Contact resistance
(See note.)
30 mΩ max. (20 mV max., 100 mA max.)
Insulation resistance 1,000 MΩ min. (at 500 VDC)
Dielectric strength 650 VAC for 1 min
(leakage current: 1 mA max.)
Total insertion force 0.78 N max. per contact
Total removal force 0.10 N min. per contact
Insertion durability 400 times
Ambient operating
temperature
−55 to 105°C (with no condensation or
icing)
Item
Type
Plug Socket
Housing PBT (UL94 V-0)/black
Locator PBT (UL94 V-0)/black
Contact Mating
end
Phosphor bronze/nick-
el base, gold/palladi-
um plating
Phosphor bronze/
nickel base, gold/
palladium plating
Terminal Phosphor bronze/nick-
el base, tin plating
Phosphor bronze/
nickel base, tin plat-
ing
Fastening pins Copper alloy/tin plating
2Half-pitch Board-to-Board Connectors XH2
XH2A Plug, Straight DIP Terminals
■Dimensions (unit: mm)
■Ordering Information
Note: Applicable board thickness is 1.6 mm.
Model
No. of
contacts
Plug/Straight DIP Terminals Plug/Straight DIP Terminals
with fastening pins (See note.)
20 XH2A-2041 XH2A-2041-A
30 XH2A-3041 XH2A-3041-A
40 XH2A-4041 XH2A-4041-A
50 XH2A-5041 XH2A-5041-A
60 XH2A-6041 XH2A-6041-A
68 XH2A-6841 XH2A-6841-A
80 XH2A-8041 XH2A-8041-A
100 XH2A-0141 XH2A-0141-A
Triangular mark
With fastening pins
(applicable board thickness: 1.6 mm)
30 or 50 contacts
Mounting holes
(bottom view)
30 or 50 contacts
20, 40, 60, 68, 80, or 100 contacts
Triangular mark
Reference
Reference
20, 40, 60, 68, 80, or 100 contacts
Two, 2.2 dia.
+0.1
0
0.8 dia.
+0.1
0
Two, 2.1 dia.
XH2A-@@41 (Straight DIP Terminals)
Dimensions
Dimensions
(mm)
No. of
contacts
ABCD
20 25.4 19.05 15.8 11.43
30 31.8 25.40 22.2 17.78
40 38.1 31.75 28.5 24.13
50 44.5 38.10 34.9 30.48
60 50.8 44.45 41.2 36.83
68 55.9 49.53 46.3 41.91
80 63.5 57.15 53.9 49.53
100 76.2 69.85 66.6 62.23
XH2A-@@41-A (Straight DIP Terminals
with Fastening Pins)
Half-pitch Board-to-Board Connectors XH2 3
XH2A Plug, Right-angle DIP Terminals
■Dimensions (unit: mm)
■Ordering Information
Note: Applicable board thickness is 1.6 mm.
With fastening pins
(applicable board thickness: 1.6 mm)
30 or 50 contacts
Mounting holes
(bottom view)
30 or 50 contacts 20, 40, 60, 68, 80, or 100 contacts
Triangular mark Reference
Reference
20, 40, 60, 68, 80, or 100 contacts
Triangular mark
Two, 2.2 dia.
+0.1
0
0.8 dia.
+0.1
0
Two, 2.1 dia.
XH2A-@@42 (Right-angle DIP Terminals)
Dimensions
Dimensions
(mm)
No. of
contacts
ABCD
20 25.4 19.05 15.8 11.43
30 31.8 25.40 22.2 17.78
40 38.1 31.75 28.5 24.13
50 44.5 38.10 34.9 30.48
60 50.8 44.45 41.2 36.83
68 55.9 49.53 46.3 41.91
80 63.5 57.15 53.9 49.53
100 76.2 69.85 66.6 62.23
XH2A-@@42-A (Right-angle DIP Terminals
with Fastening Pins)
Model
No. of
contacts
Plug/Right-angle DIP
Terminals
Plug/Right-angle DIP Terminals
with fastening pins (See note.)
20 XH2A-2042 XH2A-2042-A
30 XH2A-3042 XH2A-3042-A
40 XH2A-4042 XH2A-4042-A
50 XH2A-5042 XH2A-5042-A
60 XH2A-6042 XH2A-6042-A
68 XH2A-6842 XH2A-6842-A
80 XH2A-8042 XH2A-8042-A
100 XH2A-0142 XH2A-0142-A
4Half-pitch Board-to-Board Connectors XH2
XH2B Socket, Straight DIP Terminals
■Dimensions (unit: mm)
■Ordering Information
Note: Applicable board thickness is 1.6 mm.
With fastening pins
(applicable board thickness: 1.6 mm)
30 or 50 contacts
Mounting holes
(bottom view)
30 or 50 contacts
Triangular mark
Reference
Reference
20, 40, 60, 68, 80, or 100 contacts
Triangular mark
20, 40, 60, 68, 80, or 100 contacts
Two, 2.2 dia.
+0.1
0
0.8 dia.
+0.1
0
Two, 2.1 dia.
XH2B-@@41 (Straight DIP Terminals)
Dimensions
Dimensions
(mm)
No. of
contacts
ABCD
20 25.4 19.05 15.7 11.43
30 31.8 25.40 22.1 17.78
40 38.1 31.75 28.4 24.13
50 44.5 38.10 34.8 30.48
60 50.8 44.45 41.1 36.83
68 55.9 49.53 46.2 41.91
80 63.5 57.15 53.8 49.53
100 76.2 69.85 66.5 62.23
XH2B-@@41-A (Straight DIP
Terminals with Fastening Pins)
Model
No. of
contacts
Socket/Straight DIP Terminals Socket/Straight DIP Terminals with
fastening pins (See note.)
20 XH2B-2041 XH2B-2041-A
30 XH2B-3041 XH2B-3041-A
40 XH2B-4041 XH2B-4041-A
50 XH2B-5041 XH2B-5041-A
60 XH2B-6041 XH2B-6041-A
68 XH2B-6841 XH2B-6841-A
80 XH2B-8041 XH2B-8041-A
100 XH2B-0141 XH2B-0141-A
Half-pitch Board-to-Board Connectors XH2 5
XH2B Socket, Right-angle DIP Terminals
■Dimensions (unit: mm)
■Ordering Information
Note: Applicable board thickness is 1.6 mm.
With fastening pins
(applicable board thickness: 1.6 mm)
30 or 50 contacts
Mounting holes
(bottom view)
30 or 50 contacts
Triangular mark
Reference
Reference
20, 40, 60, 68, 80, or 100 contacts
Triangular mark
20, 40, 60, 68, 80, or 100 contacts
Triangular mark
Two, 2.2 dia.
+0.1
0
0.8 dia.
+0.1
0
Two, 2.1 dia.
XH2B-@@42 (Right-angle DIP Terminals)
Dimensions
Dimensions
(mm)
No. of
contacts
ABCD
20 25.4 19.05 15.7 11.43
30 31.8 25.40 22.1 17.78
40 38.1 31.75 28.4 24.13
50 44.5 38.10 34.8 30.48
60 50.8 44.45 41.1 36.83
68 55.9 49.53 46.2 41.91
80 63.5 57.15 53.8 49.53
100 76.2 69.85 66.5 62.23
XH2B-@@42-A (Right-angle DIP
Terminals with Fastening Pins)
Model
No. of
contacts
Socket/Right-angle DIP
Terminals
Socket/Right-angle DIP Terminals
with fastening pins (See note.)
20 XH2B-2042 XH2B-2042-A
30 XH2B-3042 XH2B-3042-A
40 XH2B-4042 XH2B-4042-A
50 XH2B-5042 XH2B-5042-A
60 XH2B-6042 XH2B-6042-A
68 XH2B-6842 XH2B-6842-A
80 XH2B-8042 XH2B-8042-A
100 XH2B-0142 XH2B-0142-A
6Half-pitch Board-to-Board Connectors XH2
■Accessories (Sold Separately) (unit: mm)
■Ordering Information
■Mating Diagram (Vertical/Horizontal/Stacking)
Note: The function of the standard and reverse models is the same as that of the standard XC5 DIN Connector.
Model
No. of contacts
XH2A (for Plug) XH2B (for Socket)
Model Dimensions A (mm) Model Dimensions B (mm)
20 XH2T-2001 25 XH2T-2002 15
30 XH2T-3001 31 XH2T-3002 21
40 XH2T-4001 37 XH2T-4002 27
50 XH2T-5001 44 XH2T-5002 34
60 XH2T-6001 50 XH2T-6002 40
68 XH2T-6801 55 XH2T-6802 45
80 XH2T-8001 63 XH2T-8002 53
100 XH2T-0101 75 XH2T-0102 65
(unit: mm)
Vertical (standard) (See note.) Vertical (reverse) (See note.) Stacking Horizontal
Dust Cover (material: ABS)
XH2T-@@01 (for Plug)
XH2T-@@02 (for Socket)
XH2T-@@01 (Transparent for Plug)
XH2T-@@02 (Blue for Socket)
Attach these Dust Covers to Connectors
that are not in use. They do not protect
the Connectors from flux during auto-
mated soldering.
Plug
XH2A
-@@42
Socket
XH2B
-@@41
Plug
XH2A
-@@41
Socket
XH2B
-@@42
Plug
XH2A
-@@41
Socket
XH2B
-@@41
Plug
XH2A-@@42
Socket
XH2B-@@42
Note: Order the following models in multiples of the minimum order.
Half-pitch Board-to-Board Connectors XH2 7
■Contact Numbers
Item
Model
Mated diagram Mounting holes (bottom view)
Plug, Straight
Te r m i n a l s
Plug, Right-angle
Te r m i n a l s
Socket, Straight
Te r m i n a l s
Socket, Right-angle
Te r m i n a l s
Reference
Triangular mark
Reference
Triangular mark
Reference
Triangular mark
Reference
Triangular mark
Reference
Triangular mar
k
Reference
Triangular mar
k
Reference
Triangular mark
Reference
Triangular mar
k
•Contact numbers are not printed on the
connectors. Use the triangular mark (▼)
as a guide when designing and mounting
to boards.
•On the mating side, the row of terminals
on the triangular mark side are called row
a, and the row on the other side is called
row b. The numbers are in the order
shown.
•The triangular marks on the plug and
socket must be aligned when mated. The
contact numbers on both sides must
match.
■Precautions
Correct Use
Mating Compatibility
XH2 Half-pitch Connectors do not mate
with XH3 or XH4 Half-pitch Connectors.
Special Finish for
Preventing Flux Rise
XH2 Connectors (i.e., Straight Terminals)
have a special finish that prevents flux rise.
(The Connectors are designed for auto-
mated soldering. Brush coating flux from
the back of the board applies too much flux
and may nullify the special finish. Never
use this method to apply flux.)
Soldering
Automated soldering
Use tape to mask the Right-angle Terminal
Connector prior to automated soldering.
Automated Soldering
Conditions (Jet Flow)
1. Soldering temperature: 250±5°C
2. Continuous soldering time: Within 5±1 s
Masking tape
• Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product.
• Consult your OMRON representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad
systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious
influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or
equipment, and be sure to provide the system or equipment with double safety mechanisms.
Cat. No. G048-E1-02
1014(0412)(O)
Note: Do not use this document to operate the Unit.
OMRON Corporation
Electronic and Mechanical Components Company
Contact: www.omron.com/ecb
