Hirose Electric EM-W Specifications
Waterproof Bayonet Lock Connector for 50A Power Supply
EM-W Series
Mated condition
117
Fig.1
Features
1. High current 4 position connector
(Three-phase power source + ground)
Compatible with 50A current 3-position connectors and
cables. (For the relationship between ambient temperature
and current, see the derating curve shown in Fig.2)
2. Easy crimp termination
Crimp contact is user-friendly and the easy-to-assemble
design allows for uniform termination.
3. Uses a standard crimp tool
The crimp contacts can be terminated by using the JIS C
9711-compliant crimp tool.
4. Sequential ground contact
Sequential mating allows the ground contact to mate first.
The ground contact touches the metal shell. (Receptacle)
5. Quick and secure bayonet lock
Easy to operate One-touch Bayonet lock.
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.
6. Waterproof design
IP68 compliant water resistance in mated condition
IP68 : No water intrusion while submerged in 2m water
depth for 14 days in mated condition
7. Safety Standard
TÜV certified
100
90
80
70
60
50
40
Current (A)
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100 110 120 130
Measurement Condition :
3 contacts connected in series with 8mm
Measurement performed with the plug sealed for
air tightness (waterproofness).
Comment : 50A current rating assumes the
connector is used at maximum of 85℃ ambient
temperature. The actual current used should be
determined individually based on the derating
curve. The derating curve is not guaranteed
and will change dependent on factors such as
the cable used. The values in this diagram are
not guaranteed, but should be used as
reference values. Actual measurement may
vary even when all the measurements are done
under the same conditions.
Derating Curve
Ambient temperature
（℃）
Basic curve
Derating curve
2
wire.
Fig.2
In cases where the application will demand a high level of reliability, such as automotive,
please contact a company representative for further information.
2016.5
1
EM-W Series●Waterproof Bayonet Lock Connector for 50A Power Supply
Product Specifications
Rated current
Ratings
Rated voltage AC 250V, DC 250V
Item Specifications Conditions
1. Contact resistance 1mø max. Measured at DC 1A
2. Insulation resistance 5000Mø min. Measured at DC 500V
3. Withstanding voltage No flashover or breakdown Apply AC 2210V for 1 minute.
4. Vibration resistance
5. Shock resistance
6. Mechanical operation Contact resistance : 1mø max. 500 times
7. Temperature cycles Insulation resistance : 5000Mø min.
8. Humidity resistance
(Steady state)
9. Waterproofness No water intrusion inside connector
(See the Derating Curve on page 1.)
No electrical discontinuity of 10µs or
more
No electrical discontinuity of 10µs or
more
Insulation resistance :
50Mø min. (at high humidity)
500Mø min. (dry environment)
50A
Operating
temperature range
Storage
temperature range
10 to 50 to 10Hz/cycle, half amplitude of 0.75mm,
5 minutes/cycle, 10 cycles in each of the three axial directions
Acceleration : 490m/s
3 directions, 3 cycles for each
-55ç : 30 minutes/Room temperature : 2 to 3
minutes/+125ç 30 minutes/Room temperature :
2 to 3 minutes, 5 cycles
Left at a temperature of 40°C and in humidity of
90 to 95% for 96 hours.
Submerged in 1.8m water depth for 48 days in
mated condition.
2
, duration : 11ms,
-40 to +125ç
-10 to +60ç
Materials / Finish
Item Materials Finish Remarks
Outer shell Aluminum alloy Nickel plated --------------------
Insulator PBT resin -------------------- UL94V-0
Contact Copper alloy
Waterproof packing Silicon rubber -------------------- --------------------
Tin plated (over nickel under plating)
Product Number Structure
Refer to the chart below when determining the product specifications from the product number.
Please select from the product numbers listed in this catalog when placing orders.
Connector
EM 35 W B P
❶❷❸❹❺ ❻❼❽ ❾
-
4SC(**
Code clamp
EM 35 W CC
Mar.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.
❶❷❸❺ ❿ ❾
-
23(**
)
Crimp contact
EM - S C - 1 3 3(**
❶❼❽⓫⓬⓭❾
❶ Series name : EM
❷ Shell size : 35
❸ Specialty:
❹
Lock mechanism: B=Bayonet lock
❺ Connector type :
R=Receptacle
❻ Number of contacts :
❼
Discrimination between contacts : S=Female contact
P=Male contact
❽ Termination method : C=Crimp
W=Waterproof
P=Plug
CC=Code clamp
4
)
)
❾ Specifications : When different types of
❿ Applicable cable diameter
⓫ Contact shape : 1=Loose piece contact
⓬ Change in shape/gender :
When contacts of the same size vary in shape/
gender, discriminate them by attaching a serial
number (1, 2, 3, ...) to each.
⓭ Plating : 3=Tin plated
--------------------
specifications are provided, attach
(01), (02), ... for identification.
2
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