Harwin Gecko - 1.25mm High Reliability Connectors

Gecko is the award-winning new high-reliability, high-performance connector from Harwin that is small, withstands extreme temperatures and is unshockable.

Pin spacing of 1.25mm
Up to 50 contacts per connector
35% space saving over other high-performance connectors
2.8A per contact in isolation, 2A per contact simultaneously
Cable connectors are available as pre-crimped assemblies or as pre-crimped cables or simply as loose contacts

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Product Description

Harwin's Gecko (G125 series) connectors provide a low-profile, dual-row cable-to-board and board-to-board interconnect solution, ideally suited for stacking and cable mating in areas where PCB real estate is at a premium.

With space and weight a consideration for many high-reliability applications, G125 connectors are designed to offer high performance in a miniature package.

Tested and proven to allow high performance in extreme conditions, the G125 family can operate within a wide temperature range (-65°C / +150°C) and under extreme vibration (Z axis 100g 6ms). This high performance is made possible by Harwin's four-finger patented (pending) Copper Alloy Contact.

Award winner

Harwin's Gecko range is the winner of the Elektra Passive and Electromechanical Product of the Year 2013.

Housing features

The keyway is polarised, the No 1 position is clearly marked for easy cable identification and the rear wall accepts potting material to reduce cable strain.

Typical applications

Commercial avionics, Medical electronics, Robotics, Military, UAVs, Oil and Gas industries.

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Manufacturer Part No	Order Code	Manufacturer / Description	Availability	Price For	Price	Quantity	Product Range	Contact Gender	Contact Termination Type	For Use With	Wire Size AWG Max	Wire Size AWG Min	Current Rating	Contact Material	Contact Plating
G125-0020005	2408689 Data Sheet + RoHS	Contact, Gecko-SL G125, Socket, Crimp, Gecko G125 Series Housing Connectors, 28 AWG, 32 AWG HARWIN You previously purchased this product. View in Order History	26,575 in stock + Check Stock & Lead Times 26,575 in stock for next day delivery (UK stock) 15,600 more will be available week commencing 14/06/26 8,400 more will be available week commencing 05/07/26 24,600 more will be available week commencing 02/08/26 More stock available week commencing 10/08/26	Each	1+ £1.28 £1.54 10+ £1.00 £1.20 100+ £0.807 £0.97 500+ £0.72 £0.86	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko-SL G125	Socket	Crimp	Gecko G125 Series Housing Connectors	28AWG	32AWG	2.8A	Beryllium Copper	Gold Plated Contacts
G125-1010005	2408690 Data Sheet + RoHS Date/Lot Code	Contact, Gecko-SL G125, Pin, Crimp, Gecko G125 Series Housing Connectors, 26 AWG, 26 AWG HARWIN You previously purchased this product. View in Order History	6,165 in stock + Check Stock & Lead Times 6,165 in stock for next day delivery (UK stock) 7,000 more will be available week commencing 31/05/26 5,600 more will be available week commencing 21/06/26 2,800 more will be available week commencing 19/07/26 11,200 more will be available week commencing 26/07/26 More stock available week commencing 03/08/26	Each	1+ £1.02 £1.22 10+ £0.813 £0.98 100+ £0.642 £0.77 500+ £0.573 £0.69	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko-SL G125	Pin	Crimp	Gecko G125 Series Housing Connectors	26AWG	26AWG	2.8A	Brass	Gold Plated Contacts
G125-1020005	2408691 Data Sheet + RoHS Date/Lot Code	Contact, Gecko-SL G125, Pin, Crimp, Gecko G125 Series Housing Connectors, 28 AWG, 32 AWG HARWIN You previously purchased this product. View in Order History	600 in stock + Check Stock & Lead Times 600 in stock for next day delivery (UK stock) 700 more will be available week commencing 24/05/26 2,100 more will be available week commencing 07/06/26 4,800 more will be available week commencing 05/07/26 More stock available week commencing 13/07/26	Each	1+ £0.998 £1.20 10+ £0.797 £0.96 100+ £0.629 £0.75 500+ £0.562 £0.67	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko-SL G125	Pin	Crimp	Gecko G125 Series Housing Connectors	28AWG	32AWG	2.8A	Brass	Gold Plated Contacts
G125-2041696L0	2408693 + RoHS Date/Lot Code	Connector Housing, Black / Green, G125, Receptacle, 16 Ways, 1.25 mm, G125 Series Contacts HARWIN You previously purchased this product. View in Order History	1,074 in stock + Check Stock & Lead Times 1,074 in stock for next day delivery (UK stock) More stock available week commencing 13/07/26	Each	1+ £2.36 £2.83 10+ £1.77 £2.12 100+ £1.51 £1.81 250+ £1.42 £1.70	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	G125	-	-	G125 Series Contacts	-	-	-	-	-
G125-2042096L0	2408694 + RoHS Date/Lot Code	Connector Housing, Black / Green, G125, Receptacle, 20 Ways, 1.25 mm, G125 Series Contacts HARWIN You previously purchased this product. View in Order History	1,787 in stock + Check Stock & Lead Times 1,787 in stock for next day delivery (UK stock) More stock available week commencing 13/07/26	Each	1+ £2.55 £3.06 10+ £1.92 £2.30 100+ £1.63 £1.96 250+ £1.53 £1.84	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	G125	-	-	G125 Series Contacts	-	-	-	-	-
G125-2042696L0	2408695 + RoHS Date/Lot Code	Connector Housing, Black / Green, G125, Receptacle, 26 Ways, 1.25 mm, G125 Series Contacts HARWIN You previously purchased this product. View in Order History	59 in stock + Check Stock & Lead Times 59 in stock for next day delivery (UK stock) 240 more will be available week commencing 07/06/26 600 more will be available week commencing 28/06/26 More stock available week commencing 13/07/26	Each	1+ £2.75 £3.30 10+ £2.08 £2.50 100+ £1.76 £2.11 250+ £1.65 £1.98	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	G125	-	-	G125 Series Contacts	-	-	-	-	-
G125-3041696L4	2408698 + RoHS Date/Lot Code	Connector Housing, Black / Green, G125, Receptacle, 16 Ways, 1.25 mm, G125 Series Contacts HARWIN You previously purchased this product. View in Order History	170 in stock + Check Stock & Lead Times 170 in stock for next day delivery (UK stock) More stock available week commencing 20/07/26	Each	1+ £3.67 £4.40 10+ £2.80 £3.36 100+ £2.38 £2.86 250+ £2.23 £2.68	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	G125	-	-	G125 Series Contacts	-	-	-	-	-
G125-3042096L4	2408699 + RoHS Date/Lot Code	Connector Housing, G125, Receptacle, 20 Ways, 1.25 mm, G125 Series Contacts HARWIN You previously purchased this product. View in Order History	29 in stock + Check Stock & Lead Times 29 in stock for next day delivery (UK stock) 400 more will be available week commencing 19/07/26 More stock available week commencing 20/07/26	Each	1+ £3.88 £4.66 10+ £2.96 £3.55 100+ £2.52 £3.02 250+ £2.36 £2.83	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	G125	-	-	G125 Series Contacts	-	-	-	-	-
G125-FS11205L0R	2408701 + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 12 Contacts, Surface Mount HARWIN You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 99 days	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408701 2408710 in Cut Tape Non-Cancellable / Non Returnable	400+ £5.50 £6.60	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	Gecko G125	-	Surface Mount	-	-	-	-	Copper	Gold Plated Contacts
G125-FS12005L0R	2408704 + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 20 Contacts, Surface Mount HARWIN You previously purchased this product. View in Order History	Available for back order + Check Stock & Lead Times More stock available week commencing 10/08/26 Contact me when back in stock	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408704 2408712 in Cut Tape	400+ £9.53 £11.44 1200+ £9.08 £10.90	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	Gecko G125	-	Surface Mount	-	-	-	-	Copper	Gold Plated Contacts
G125-FV11605L0R	2408707 Data Sheet + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 16 Contacts, Through Hole Mount HARWIN You previously purchased this product. View in Order History	250 in stock + Check Stock & Lead Times 250 in stock for next day delivery (UK stock) More stock available week commencing 10/08/26	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408707 2408716 in Cut Tape	250+ £8.00 £9.60 750+ £7.84 £9.41	Restricted Item Minimum order of 250 items Multiples of 250 only Please enter a valid quantity Add Min: 250 Mult: 250	Gecko G125	-	Through Hole	-	-	-	-	Copper	Gold Plated Contacts
G125-FV12605L0R	2408709 Data Sheet + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 26 Contacts, Through Hole Mount HARWIN You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 99 days	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408709 2408718 in Cut Tape Non-Cancellable / Non Returnable	250+ £10.40 £12.48	Restricted Item Minimum order of 250 items Multiples of 250 only Please enter a valid quantity Add Min: 250 Mult: 250	Gecko G125	-	Through Hole	-	-	-	-	Copper	Gold Plated Contacts
G125-FS11205L0P	2408710 + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 12 Contacts, Surface Mount HARWIN You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 106 days	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2408710 2408701 in Full Reel Non-Cancellable / Non Returnable	150+ £6.34 £7.61	Restricted Item Minimum order of 150 items Multiples of 150 only Please enter a valid quantity Add Min: 150 Mult: 150	Gecko G125	-	Surface Mount	-	-	-	-	Copper	Gold Plated Contacts
G125-FV11605L0P	2408716 Data Sheet + RoHS Date/Lot Code	PCB Receptacle, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 16 Contacts, Through Hole Mount HARWIN You previously purchased this product. View in Order History	Available for back order + Check Stock & Lead Times 227 more will be available week commencing 07/06/26 More stock available week commencing 17/08/26 Contact me when back in stock	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2408716 2408707 in Full Reel	1+ £12.56 £15.07 10+ £10.38 £12.46 25+ £9.61 £11.53 100+ £8.83 £10.60	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko G125	-	Through Hole	-	-	-	-	Copper	Gold Plated Contacts
G125-FW10450AAL9400	2408720 Data Sheet + RoHS Date/Lot Code	Cable Assembly, Crimp Receptacle to Free End, 17.717 ", 450 mm, Gecko G125 Series, White HARWIN You previously purchased this product. View in Order History	Available for back order + Check Stock & Lead Times 271 more will be available week commencing 31/05/26 840 more will be available week commencing 07/06/26 280 more will be available week commencing 28/06/26 560 more will be available week commencing 12/07/26 More stock available week commencing 03/08/26 Contact me when back in stock	Each	1+ £4.49 £5.39 10+ £3.93 £4.72 100+ £3.25 £3.90 250+ £2.92 £3.50	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko G125 Series	-	-	-	-	-	-	-	-
G125-FW10300F94	2408724 Data Sheet RoHS	Cable Assembly, Crimp Socket to Crimp Socket, 11.811 ", 300 mm, White HARWIN You previously purchased this product. View in Order History	No Longer Stocked	Each	null	Restricted Item	-	-	-	-	-	-	-	-	-
G125-MS11205L3R	2408728 Data Sheet + RoHS Date/Lot Code	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 12 Contacts, Surface Mount, Gecko G125 HARWIN You previously purchased this product. View in Order History	Available for back order + Check Stock & Lead Times More stock available week commencing 10/08/26 Contact me when back in stock	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408728 2408736 in Cut Tape	400+ £4.31 £5.17 1200+ £3.99 £4.79	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	Gecko G125	-	Surface Mount	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MS11605L3R	2408729 Data Sheet + RoHS Date/Lot Code	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 16 Contacts, Surface Mount, Gecko G125 HARWIN You previously purchased this product. View in Order History	400 in stock + Check Stock & Lead Times 400 in stock for next day delivery (UK stock) More stock available week commencing 10/08/26	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408729 2408737 in Cut Tape	400+ £4.74 £5.69 1200+ £4.39 £5.27	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	Gecko G125	-	Surface Mount	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MS12005L3R	2408730 Data Sheet + RoHS Date/Lot Code	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 20 Contacts, Surface Mount, Gecko G125 HARWIN You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 99 days	Each (Supplied on Full Reel) Full Reel Packaging Options Suggested replacement for:2408730 2408738 in Cut Tape Non-Cancellable / Non Returnable	400+ £4.27 £5.12	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	Gecko G125	-	Surface Mount	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MV12005L1R	2408734 Data Sheet + RoHS Date/Lot Code	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 20 Contacts, Through Hole, Gecko G125 HARWIN You previously purchased this product. View in Order History	Available to supplier Lead Time + Check lead times Lead time 99 days	Each (Supplied on Full Reel) Full Reel Non-Cancellable / Non Returnable	1000+ £3.00 £3.60	Restricted Item Minimum order of 1000 items Multiples of 1000 only Please enter a valid quantity Add Min: 1000 Mult: 1000	Gecko G125	-	Through Hole	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MS11605L3P	2408737 Data Sheet + RoHS	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 16 Contacts, Surface Mount, Gecko G125 HARWIN You previously purchased this product. View in Order History	213 in stock + Check Stock & Lead Times 213 in stock for next day delivery (UK stock) More stock available week commencing 17/08/26	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2408737 2408729 in Full Reel	1+ £7.37 £8.84 10+ £5.78 £6.94 25+ £5.35 £6.42 100+ £4.92 £5.90	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko G125	-	Surface Mount	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MV11205L1P	2408742 Data Sheet + RoHS Date/Lot Code	Pin Header, Black / Green, Wire-to-Board, 1.25 mm, 2 Rows, 12 Contacts, Through Hole, Gecko G125 HARWIN You previously purchased this product. View in Order History	66 in stock + Check Stock & Lead Times 66 in stock for next day delivery (UK stock) 300 more will be available week commencing 09/08/26 More stock available week commencing 10/08/26	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2408742 2408732 in Full Reel	1+ £4.94 £5.93 10+ £3.79 £4.55 100+ £3.23 £3.88 250+ £3.17 £3.80	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Gecko G125	-	Through Hole	-	-	-	-	Phosphor Bronze	Gold Plated Contacts
G125-MW20450L94	2408749 Data Sheet + RoHS Date/Lot Code	Cable Assembly, 17.717 ", 450 mm, White HARWIN You previously purchased this product. View in Order History	No Longer Stocked	Each	null	Restricted Item	-	-	-	-	-	-	-	-	-
G125-MW10300F94	2408751 Data Sheet + RoHS Date/Lot Code	Cable Assembly, 11.811 ", 300 mm, White HARWIN You previously purchased this product. View in Order History	No Longer Stocked	Each Non-Cancellable / Non Returnable	null	Restricted Item	-	-	-	-	-	-	-	-	-
Z125-902	2408761 Data Sheet Date/Lot Code	Insertion Tool, G125 GECKOP Crimp Contacts HARWIN You previously purchased this product. View in Order History	60 in stock + Check Stock & Lead Times 60 in stock for next day delivery (UK stock) 108 more will be available week commencing 21/06/26 More stock available week commencing 13/07/26	Each	1+ £77.02 £92.42 5+ £71.39 £85.67 10+ £69.09 £82.91 25+ £66.18 £79.42	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	-	-	-	G125 GECKOP Crimp Contacts	-	-	-	-	-