Item no. 770-704

WINSTA® MIDI Snap-in socket; 4-pole; Cod. A; 4,00 mm²; black


  • Protected against mismating and maintenance-free
  • Push-in CAGE CLAMP® spring pressure connection technology allows solid conductors to be simply pushed into a unit
  • Two-wire connection per pole for loops or bridges
  • Additional variable coding is possible


All connectors for mounted installations (snap-in versions for lighting fixtures or devices, all types of PCB and distribution connectors) are factory-equipped with locking levers to ensure plugs and sockets are securely locked. Additional locking levers are only required for flying leads (plug/socket).

Note on Protection Against Mismating:
All WINSTA® components are 100% protected against mismating in terms of:
a.) plugging different number of poles
b.) plugging when turned by 180°
c.) plugging when laterally staggered
d.) plugging one pole
Safety information 1:
Application note for the U.S. market (USR): Some versions may also be used for current interruption in accordance with the UL certificate in select applications with currents below 16 A and voltages up to 600 V. For further information, please contact your local sales office.

Product details


Electrical data

Note on Contact Resistance approx. 1mΩ contact resistance approx. 0.25mΩ contact transition plug/socket
Ratings per IEC/EN 60664-1
Rated voltage (III / 3) 400 V
Rated impulse voltage (III / 3) 6 kV
Rated current 25 A
Legend (ratings) (III / 3) ≙ Overvoltage category III / Pollution degree 3
Approvals per UL 1977
Rated voltage per UL 1977 (factory wiring only) 600 V
Rated current per UL 1977 (factory wiring only) 23 A

Connection data

Connection technology Push-in CAGE CLAMP®
Actuation type Operating tool
Nominal cross section 4 mm²
Solid conductor 0.5 … 4 mm² / 20 … 12 AWG
Solid conductor, push-in termination 1.5 … 4 mm² / 16 … 12 AWG
Stranded conductor 0.5 … 2.5 mm² / 20 … 14 AWG
Fine-stranded conductor 0.5 … 4 mm² / 20 … 12 AWG
Fine-stranded conductor with ferrule with plastic collar 0.25 … 1.5 mm² / 20 … 16 AWG
Fine-stranded conductor with ferrule without plastic collar 0.25 … 2.5 mm² / 20 … 14 AWG
Fine-stranded conductor with ferrule, push-in termination, from 1.5 mm² / 16 AWG
Strip length 9 mm / 0.35 inch
Note (strip length) see also packaging or instructions
No. of poles 4
Total number of connection points 8
Total number of potentials 4
Conductor entry direction to mating direction 0 °

Geometrical Data

Pin spacing 10 mm / 0.394 inch
Width 45.5 mm / 1.791 inch
Height 18.5 mm / 0.728 inch
Depth 36 mm / 1.417 inch

Mechanical data

Coding A
Mating force of a plug-in connection approx. 20 … 70 N (depending on pole number)
Retention force of a plug-in connection When locked: > 80 N
Unmating force of a plug-in connection when unlocked: approx. 20 … 70 N (depending on pole number)
Number of mating cycles

200, without resistive load

100, with resistive load IN = 25 A, tested (4 mm²/AWG 12)

Gehäuseblechstärke 0.5 … 2 mm / 0.02 … 0.079 inch
Mounting type Snap-in
Marking N ⏚ 2/L 1/L'
Protection class IP20
Note on protection class Only in mated condition with strain relief housing (These compact connectors are not designed for use in open, easily accessible areas.)
Potential marking N ⏚ 2/L 1/L'
Application Standard network application

Plug connection

Contact type (pluggable connector) Female connector/socket
Connector connection type for conductors
Mismating protection Yes
Locking of plug-in connection locking lever
Locking lever yes

Material Data

Color black
Insulating material Polyamide 66 (PA 66)
Clamping spring material Chrome nickel spring steel (CrNi)
Contact material Copper or copper alloy, surface-treated
Fire load 0.198 MJ
Weight 15.7

Environmental Requirements

Processing temperature -5 … +40 °C
Continuous operating temperature -35 … +85 °C
Note on Continuous Service Temperature Insulating parts for temperatures ≤ 105 °C

Commercial data

Product Group 20 (WINSTA)
Packaging type BOX
Country of origin DE
GTIN 4044918252584
Customs Tariff No. 85366990990

Approvals / Certificates

Country specific Approvals

Additional Approval Text
Certificate name
Approval: CCA
DEKRA Certification B.V.
Additional Approval Text EN 61535
Certificate name: 2173495.02
Approval: CCA
DEKRA Certification B.V.
Additional Approval Text IEC 61535
Certificate name: NL-32105

Ship Approvals

Additional Approval Text
Certificate name
Approval: ABS
American Bureau of Shipping
Additional Approval Text -
Certificate name: 19-HG1868589-PDA
Approval: DNV GL
Det Norske Veritas, Germanischer Lloyd
Additional Approval Text -
Certificate name: TAE00001Z6
Approval: LR
Lloyds Register
Additional Approval Text IEC 61984
Certificate name: 02/20050 (E6)


Additional Approval Text
Certificate name
Approval: cURus
Underwriters Laboratories Inc.
Additional Approval Text UL 1977
Certificate name: E45171 Sec. 9



CAD data

2D/3D Models 770-704

CAE data

EPLAN Data Portal 770-704
WSCAD Universe 770-704

Compatible products


Item no.: 770-201
Lockout cap; 12-pole, separable; 12-pole; for sockets; black
Item no.: 770-221
Lockout cap; for socket; 12-pole; separable; white
Item no.: 770-644
Lockout cap; 4-pole; for cutouts; Plastic; black

Installation Notes

4 pictures
Inserting a conductor

1. Strip length, outer insulation = 35 mm (2-pole), 55 mm (3- to 5-pole)

2. Strip length = 9 mm

3. Extended ground conductor = 8 mm

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1 picture
Removal a conductor

To remove the conductor, actuate the clamp via screwdriver (2.5 mm blade width) and pull out the conductor.​

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1 picture

Seal unused cutout with lockout cap.

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