login Login/Signup
icon 0
close
close

Buy SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A in United States - Rehmie.com

SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A

SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A

REP1509081 0994138202552 REP1509081

SIEMENS

SIEMENS
2025-05-03 USD 255.17

$ 255.17 $ 257.75

Item Added to Cart

*Product availability is subject to suppliers inventory

SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SHIPPING ALL OVER UNITED STATES
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
100% MONEY BACK GUARANTEE
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
EASY 30 DAYSRETURNS & REFUNDS
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
24/7 CUSTOMER SUPPORT
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
TRUSTED AND SAFE WEBSITE
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
100% SECURE CHECKOUT
Description Product Specifications
Type Relays

SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A

condition: New

MPN: 3RT20181AK62

Brand: SIEMENS

NumberOfItems: 1

Weight: 0.5

Height: 1.77"

Length: 3.200

Width: 2.400

Depth: 2.87"

Height (In.): 2.26

Depth (In.): 2.87

Width (In.): 1.77

Hz: 50/60

Phase: 3

Enclosure Type: Open

Coil Volts: 120VAC

Number of Poles: 3

Action: Nonreversing

Enclosure NEMA Rating: No Enclosure

HP @ 3 Phase - 240V: 5

HP @ 3 Phase - 480V: 10

Auxiliary Contact Form: 1NC

HP @ 1 Phase - 120V: 1

HP @ 1 Phase - 230V: 2

HP @ 3 Phase - 208V: 3

HP @ 3 Phase - 575V: 10

Related Products

  See More
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
3P3T 3 Pole 3 Throw 1 Deck Band…

$ 20.36$ 20.36
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
XURUI Authorized 2Pcs XZ-15GQ-B SPDT NO+NC Panel Mount…

$ 28.07$ 28.94
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
16mm Mounting Hole Green Momentary Push Button Switch…

$ 29.12$ 30.02
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
78471-B00000030-21 Industrial Pressure Sensors 78471-3

$ 160.46$ 163.73
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
5Pcs D1 Smart Dimmer Switch DIY Smart Home…

$ 209.14$ 211.25
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SINOTIMER TM609 Home Smart 18mm 1P WiFi Remote…

$ 94.90$ 97.83
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Rainproof Hoist Crane Pendant Control Station Push Button…

$ 26.55$ 26.82
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Momentary Metal Push Button Switch 16mm Mounting 1NC…

$ 22.27$ 22.50
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Interlock Push Button Switch Piano Type DPDT 6…

$ 15.00$ 15.00
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
NTE Electronics 54-667 SWITCH SLIDE DPDT 6A 125VAC…

$ 31.51$ 31.83
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
3x6x5mm Momentary Panel PCB SMD SMT Mount 2…

$ 12.86$ 12.86
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
12mm 2 Positions Key Locking Push Button Switch…

$ 26.52$ 26.79
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
10 Pcs 12x12x9mm 2 Poles PCB Momentary Tactile…

$ 13.41$ 13.41
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
5pcs 5V Low Level Trigger One 1 Channel…

$ 34.56$ 35.63
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Momentary Metal Push Button Switch 22mm Mounting Dia…

$ 24.83$ 25.34
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Latching Metal Push Button Switch 19mm Mounting Dia…

$ 24.16$ 24.65
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
2P4T 2 Pole 4 Throw 1 Deck Band…

$ 21.44$ 21.44
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
1/2 inch DC 12V 250mA Electric Solenoid Valve…

$ 31.27$ 31.59
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Latching Push Button Switch 16mm Mounting 1NC NO…

$ 21.82$ 22.50
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
3pcs KTNNKG Blue 3V 433Mhz Wireless Remote Control…

$ 45.59$ 46.52
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A
Game Push Button 33.5mm Round 12V LED Illuminated…

$ 12.86$ 12.86
SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A SIEMENS 3RT20181AK62 120VAC Non-Reversing IEC Magnetic Contactor 3P 16A

You May Also Like

  See More
Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker
Quadplex Two Double Pole 30 Amp Outside Two…

$ 96.13$ 97.10
Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker Quadplex Two Double Pole 30 Amp Outside Two Double Pole 20 Amp Inside Circuit Breaker
New In Box SIEMENS 7NG3211-0AN00 SITRANS TH100 Temperature Transmitter
New In Box SIEMENS 7NG3211-0AN00 SITRANS TH100 Temperature…

$ 729.02$ 736.38
New In Box SIEMENS 7NG3211-0AN00 SITRANS TH100 Temperature Transmitter New In Box SIEMENS 7NG3211-0AN00 SITRANS TH100 Temperature Transmitter
SIEMENS NEW 3RG4011-0AB00 3RG4 011-0AB00 PLC INDUCTIVE PROXIMITY SENSOR 2M
SIEMENS NEW 3RG4011-0AB00 3RG4 011-0AB00 PLC INDUCTIVE PROXIMITY…

$ 206.43$ 212.81
SIEMENS NEW 3RG4011-0AB00 3RG4 011-0AB00 PLC INDUCTIVE PROXIMITY SENSOR 2M SIEMENS NEW 3RG4011-0AB00 3RG4 011-0AB00 PLC INDUCTIVE PROXIMITY SENSOR 2M SIEMENS NEW 3RG4011-0AB00 3RG4 011-0AB00 PLC INDUCTIVE PROXIMITY SENSOR 2M
Gigaset 4215 2.40 GHz Cordless Phone - Black
Gigaset 4215 2.40 GHz Cordless Phone - Black

$ 468.16$ 477.71
Gigaset 4215 2.40 GHz Cordless Phone - Black
Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk)
Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk)

$ 102.75$ 103.79
Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk) Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk) Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk) Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk) Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk) Verizon GIGASET-A510H-BK S30852-h2252-r301 A510 Handset Black (gigaseta510hbk)
Siemens S30852-H2252-R301 A510 Handset Black
Siemens S30852-H2252-R301 A510 Handset Black

$ 84.93$ 85.79
Siemens S30852-H2252-R301 A510 Handset Black
SIEMENSTPS-ESA3 TPSESA3 SECONDARY SURGE ARRESTER 277/480 VAC 25 KA (4 AVAILABLE)
SIEMENSTPS-ESA3 TPSESA3 SECONDARY SURGE ARRESTER 277/480 VAC 25…

$ 241.35$ 248.81
SIEMENSTPS-ESA3 TPSESA3 SECONDARY SURGE ARRESTER 277/480 VAC 25 KA (4 AVAILABLE) SIEMENSTPS-ESA3 TPSESA3 SECONDARY SURGE ARRESTER 277/480 VAC 25 KA (4 AVAILABLE)
Siemens Openstage 40 IP Phone
Siemens Openstage 40 IP Phone

$ 262.16$ 270.27
Siemens Openstage 40 IP Phone
GIGASET S30852-H2252-R301 Accessory Handset - BLACK GIGASET-A510H-BK
GIGASET S30852-H2252-R301 Accessory Handset - BLACK GIGASET-A510H-BK

$ 122.89$ 124.13
GIGASET S30852-H2252-R301 Accessory Handset - BLACK GIGASET-A510H-BK GIGASET S30852-H2252-R301 Accessory Handset - BLACK GIGASET-A510H-BK GIGASET S30852-H2252-R301 Accessory Handset - BLACK GIGASET-A510H-BK
Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker, Plug on Load Center Style
Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker,…

$ 122.51$ 123.75
Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker, Plug on Load Center Style Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker, Plug on Load Center Style Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker, Plug on Load Center Style Siemens Q120DF 20-Amp Afci/Gfci Dual Function Circuit Breaker, Plug on Load Center Style
New In Box SIEMENS 6AV6644-0BA01-2AX1 HMI Terminal Module
New In Box SIEMENS 6AV6644-0BA01-2AX1 HMI Terminal Module

$ 209.13$ 215.60
New In Box SIEMENS 6AV6644-0BA01-2AX1 HMI Terminal Module
Siemens Q215 15-Amp 2 Pole 240-Volt Circuit Breaker
Siemens Q215 15-Amp 2 Pole 240-Volt Circuit Breaker

$ 40.26$ 40.67
Siemens Q215 15-Amp 2 Pole 240-Volt Circuit Breaker
Siemens FS140 Whole House Surge Protection
Siemens FS140 Whole House Surge Protection

$ 674.76$ 688.53
Siemens FS140 Whole House Surge Protection Siemens FS140 Whole House Surge Protection Siemens FS140 Whole House Surge Protection Siemens FS140 Whole House Surge Protection Siemens FS140 Whole House Surge Protection
Siemens Q3030 Two 30-Amp Single Pole 120-Volt Circuit Breaker
Siemens Q3030 Two 30-Amp Single Pole 120-Volt Circuit…

$ 45.94$ 46.40
Siemens Q3030 Two 30-Amp Single Pole 120-Volt Circuit Breaker Siemens Q3030 Two 30-Amp Single Pole 120-Volt Circuit Breaker
siemens l30250-f600-a117 optipoint 500 hicom, hipath adv. telephone, manganese (renewed)
siemens l30250-f600-a117 optipoint 500 hicom, hipath adv. telephone,…

$ 85.26$ 87.90
siemens l30250-f600-a117 optipoint 500 hicom, hipath adv. telephone, manganese (renewed)
New Siemens Business Comm. Corded Phone w/ Proximity Sensor GIGASET-ES5040
New Siemens Business Comm. Corded Phone w/ Proximity…

$ 82.82$ 83.66
New Siemens Business Comm. Corded Phone w/ Proximity Sensor GIGASET-ES5040
Siemens optiSet E Basic Corded IP Business Telephone
Siemens optiSet E Basic Corded IP Business Telephone

$ 86.10$ 87.86
Siemens optiSet E Basic Corded IP Business Telephone
Q340 40-Amp Three Pole Type QP Circuit Breaker
Q340 40-Amp Three Pole Type QP Circuit Breaker

$ 140.20$ 141.62
Q340 40-Amp Three Pole Type QP Circuit Breaker Q340 40-Amp Three Pole Type QP Circuit Breaker Q340 40-Amp Three Pole Type QP Circuit Breaker
Q360 60-Amp Three Pole Type QP Circuit Breaker
Q360 60-Amp Three Pole Type QP Circuit Breaker

$ 152.91$ 157.64
Q360 60-Amp Three Pole Type QP Circuit Breaker Q360 60-Amp Three Pole Type QP Circuit Breaker
Q3100 100-Amp Three Pole Type QP Circuit Breaker
Q3100 100-Amp Three Pole Type QP Circuit Breaker

$ 273.48$ 276.24
Q3100 100-Amp Three Pole Type QP Circuit Breaker Q3100 100-Amp Three Pole Type QP Circuit Breaker
Q2125 125-Amp Double Pole Type QP Circuit Breaker
Q2125 125-Amp Double Pole Type QP Circuit Breaker

$ 187.28$ 193.07
Q2125 125-Amp Double Pole Type QP Circuit Breaker Q2125 125-Amp Double Pole Type QP Circuit Breaker