Float27 - Our Solution for Floating

ept's Float27 connectors expand the company's proven and reliable One27 product family in the floating connector segment. The floating function allows for the compensation of tolerances of ±0.8 mm during mating and while the connectors are mated.
Float27 2026 Steckeransicht mit Gegenstecker DE

Key Features

  • 1.27 mm pitch,
  • 26.1 mm to 30.7 mm PCB spacing
  • , ±0.8 mm tolerance compensation in the X and Y directions,
  • up to 2.4 mm contact overlap in the Z direction

Advantages

  • High resistance to vibration and shock
  • Reduced stress on the connection area and solder joint
  • Low displacement forces
Filter
Straight spring strip

Float27 Spring Strip x²high-profile Part No. 424-56080-51

Float27 2026 ohne LP mit Pfeile 01
Number of poles: 80, Height (unassembled): 24.35 mm, Can be combined for PCB spacing of 26.1–30.7 mm, SMT Connectivity, Grid: 1.27 mm, Performance Level 1
Parallel
Perpendicular
Float
SMT
High Density
Rugged
Float27 Spring Strip x²high-profile Part No. 424-56080-51 - Technical data

Basics

No. of Contacts80
Termination TechnologySMT
Board-to-Board Distance26.1–30.7 mm
Operating Temperature Range-55°C to +125°C

Material

Insulator MaterialLCP, UL 94 V-0
CTI value
IEC 60112
175
Contact Materialcopper alloy
PlatingAu over PdNi over Ni
Termination areaSn over Ni

Mechanical

Pitch1.27 mm
Mating Force per Pin≤ 0.5 N
Separating Force per Pin≥ 0.1 N
Durability
IEC 60512-9-1
Grade 1: 500 insertion cycles
Coplanarity≤ 0.1 mm

Electrical

Operational Current
IEC 60512-5-2
1.8 A at 20°C (2 of 80 pins)
1.4 A at 20°C (4 of 80 pins)
0.9 A at 20°C (80 of 80 pins)
Contact Resistance
IEC 60512-2-1
≤ 95 mΩ
Clearance and Creepageat least 0.45 mm
Insulation Resistance
IEC 60512-3-1
≥ 10 GΩ
Test Voltage
IEC 60512-4-1
500 VDC

Processing

Soldering Temperature
JEDEC J-STD-020E
20–40 seconds at 260°C
MSL
JEDEC J-STD-020E
1
AssemblyPick and Place

Approval / Compliance

UL fileIn progress
EnvironmentRoHS compliant
Stock Check
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Straight blade bar

One27 Low-Profile Blade Holder Part No. 413-52080-51

ept One27 Messerleiste gerade Low 403 52080 51
Can be combined for PCB spacing of 8.0–16.9 mm, Contact overlap: 1.5 mm, 80 poles in a 1.27 mm grid, SMT Connectivity, Height (unplugged): 1.75 mm, Performance Level 1
Parallel
Perpendicular
SMT
Cable-to-Board
High Density
Rugged
One27 Low-Profile Blade Holder Part No. 413-52080-51 - Technical data

Basics

No. of Contacts80
Termination TechnologySMT
Board-to-Board Distance8.0 mm – 16.9 mm
Operating Temperature Range-55°C to +125°C

Material

Insulator MaterialLCP, UL 94 V-0
CTI value
IEC 60112
175
Contact Materialcopper alloy
PlatingAu over NiP over Ni
Termination areaSn over Ni

Mechanical

Pitch1.27 mm
Mating Force per Pin≤ 0.5 N
Separating Force per Pin≥ 0.1 N
Durability
IEC 60512-9-1
Grade 1: 500 insertion cycles
Coplanarity≤ 0.1 mm
Vibration, sinusoidal
IEC 60512-6-4
10–2000 Hz, 20 g
Contact mating problems if vibrations occur, sinusoidal
IEC 60512-2-5
≤ 1 µs
Shock, semi-sinusoidal
IEC 60512-6-3
50 g, 11 ms
Contact mating problems if shock occur, semi-sinusoidal
IEC 60512-2-5
≤ 1 µs
Overmating Distance0.9 mm
Wipe lenght1.5 mm
Center offset± 0.7 mm
Axial offset when mated (x/y)± 0.4 mm
Angular offset longitudinally± 4°
Angular offset transversally± 2°

Electrical

Operational Current
IEC 60512-5-2
3.1 A at 20°C (4-pin out of 50-pin)
1.4 A at 20°C (50-pin out of 50-pin)
Contact Resistance
IEC 60512-2-1
≤ 25 mΩ
Clearance and Creepageat least 0.4 mm
Insulation Resistance
IEC 60512-3-1
≥ 10 GΩ
Test Voltage
IEC 60512-4-1
500 VAC

Processing

Soldering Temperature
JEDEC J-STD-020E
20–40 seconds at 260°C
MSL
JEDEC J-STD-020E
1
AssemblyPick and Place

Approval / Compliance

UL fileE130314
EnvironmentRoHS compliant
Stock Check
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One27 Mid-Profile Knife Strip Part No. 413-53080-51

ept One27 Messerleiste gerade Mid 403 53080 51
Can be combined for PCB spacing of 9.5–18.4 mm, Contact overlap: 1.5 mm, 80 poles in a 1.27 mm grid, SMT Connectivity, Height (unplugged): 3.25 mm, Performance Level 1
Parallel
Perpendicular
SMT
Cable-to-Board
High Density
Rugged
One27 Mid-Profile Knife Strip Part No. 413-53080-51 - Technical data

Basics

No. of Contacts80
Termination TechnologySMT
Board-to-Board Distance9.5 mm – 18.4 mm
Operating Temperature Range-55°C to +125°C

Material

Insulator MaterialLCP, UL 94 V-0
CTI value
IEC 60112
175
Contact Materialcopper alloy
PlatingAu over NiP over Ni
Termination areaSn over Ni

Mechanical

Pitch1.27 mm
Mating Force per Pin≤ 0.5 N
Separating Force per Pin≥ 0.1 N
Durability
IEC 60512-9-1
Grade 1: 500 insertion cycles
Coplanarity≤ 0.1 mm
Vibration, sinusoidal
IEC 60512-6-4
10–2000 Hz, 20 g
Contact mating problems if vibrations occur, sinusoidal
IEC 60512-2-5
≤ 1 µs
Shock, semi-sinusoidal
IEC 60512-6-3
50 g, 11 ms
Contact mating problems if shock occur, semi-sinusoidal
IEC 60512-2-5
≤ 1 µs
Overmating Distance0.9 mm
Wipe lenght1.5 mm
Center offset± 0.7 mm
Axial offset when mated (x/y)± 0.4 mm
Angular offset longitudinally± 4°
Angular offset transversally± 2°

Electrical

Operational Current
IEC 60512-5-2
3.1 A at 20°C (4-pin out of 50-pin)
1.4 A at 20°C (50-pin out of 50-pin)
Contact Resistance
IEC 60512-2-1
≤ 25 mΩ
Clearance and Creepageat least 0.4 mm
Insulation Resistance
IEC 60512-3-1
≥ 10 GΩ
Test Voltage
IEC 60512-4-1
500 VAC

Processing

Soldering Temperature
JEDEC J-STD-020E
20–40 seconds at 260°C
MSL
JEDEC J-STD-020E
1
AssemblyPick and Place

Approval / Compliance

UL fileE130314
EnvironmentRoHS compliant
Stock Check
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One27 High-Profile Blade Holder Part No. 403-54080-51

ept One27 Messerleiste gerade High 403 54080 51
Can be combined for PCB spacing of 11.1–20.0 mm, Contact overlap: 1.5 mm, 80 poles in a 1.27 mm grid, SMT Connectivity, Height (unassembled): 4.85 mm, Performance Level 1
Parallel
Perpendicular
SMT
High Density
Rugged
One27 High-Profile Blade Holder Part No. 403-54080-51 - Technical data

Basics

No. of Contacts80
Termination TechnologySMT
Board-to-Board Distance11.1–20.0 mm
Operating Temperature Range-55°C to +125°C

Material

Insulator MaterialLCP, UL 94 V-0
CTI value
IEC 60112
175
Contact Materialcopper alloy
PlatingAu over NiP over Ni
Termination areaSn over Ni

Mechanical

Pitch1.27 mm
Mating Force per Pin≤ 0.5 N
Separating Force per Pin≥ 0.1 N
Durability
IEC 60512-9-1
Grade 1: 500 insertion cycles
Coplanarity≤ 0.1 mm
Vibration, sinusoidal
IEC 60512-6-4
10–2000 Hz, 20 g
Contact mating problems if vibrations occur, sinusoidal
IEC 60512-2-5
≤ 1 µs
Shock, semi-sinusoidal
IEC 60512-6-3
50 g, 11 ms
Contact mating problems if shock occur, semi-sinusoidal
IEC 60512-2-5
≤ 1 µs
Overmating Distance0.9 mm
Wipe lenght1.5 mm
Center offset± 0.7 mm
Axial offset when mated (x/y)± 0.4 mm
Angular offset longitudinally± 4°
Angular offset transversally± 2°

Electrical

Operational Current
IEC 60512-5-2
3.1 A at 20°C (4-pin out of 50-pin)
1.4 A at 20°C (50-pin out of 50-pin)
Contact Resistance
IEC 60512-2-1
≤ 25 mΩ
Clearance and Creepageat least 0.4 mm
Insulation Resistance
IEC 60512-3-1
≥ 10 GΩ
Test Voltage
IEC 60512-4-1
500 VAC

Processing

Soldering Temperature
JEDEC J-STD-020E
20–40 seconds at 260°C
MSL
JEDEC J-STD-020E
1
AssemblyPick and Place

Approval / Compliance

UL fileE130314
EnvironmentRoHS compliant
Stock Check
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Other number of contacts? Other stacking heights? alternative plating? Individual assembly? Lagging contacts?
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Highlights of the Float27 SMT floating connector

± 0.8 mm tolerance compensation
Float27 2026 ohne LP mit Pfeile 01
  • in the X and Y directions
  • during the insertion process
  • and while the connector is inserted

Technical Features of the Float27 Connector

The Float27® provides highly flexible yet reliable connectors for a wide range of board-to-board applications. The connector is based on a 1.27 mm pitch, allows for a tolerance of ±0.8 mm, and is compatible with the One27 product family’s blade connectors thanks to its proven mating system.
image
One27 Knife Block

Details at a Glance

image
Anti-twist protection

to ensure proper connection between the blade and the terminal strip

image
Lead-in chamfers

to compensate for axial and angular misalignment during assembly

image
Boardlock

secure connection to the circuit board

image
Positioning pin

Optimal processing thanks to precise placement

image
Coplanarity

Reliable soldering during processing

image
Meniscus formation

high strength and durability of the solder joint

Float27 2026 Gruen
Float27 Connector Strip

Details at a Glance

image
Double-arm spring contact

for secure and reliable connections

image
Smooth surface

Reliable contact through contact closure on a rolled, smooth surface

28915 100x100x72x72x100 image
Overlap area

High reliability due to high tolerance compensation

Maeander
meander

to achieve high tolerance compensation

Float27 PCB Connectors

Schreibtisch ept
"Maximum PCB spacing, high tolerance compensation thanks to a floating function—all within a small, proven pitch? We wanted to take on this challenge!

Our Float27 SMT PCB connectors with a 1.27 mm pitch and floating function now deliver exactly that—and much more: thanks to their high tolerance compensation of up to ±0.8 mm, they are ideal for a wide range of applications that are subject to extremely high shock and vibration loads, require bridging of large PCB spacing, and are also processed automatically. By combining the Float27 female connector with the various designs of the One27 male connectors and a large overlap range, virtually any PCB spacing from 26.1 to 30.7 mm can be achieved. Optimal processability of the SMT PCB connectors is ensured by a coplanarity tolerance of just 0.1 mm, and maximum robustness is provided by the double-legged spring contact.
Experience the Float27 connectors firsthand and request your free samples today.

Dominik Dotzer, Product Manager, ept GmbH

FAQ: Questions and Answers About Float27 SMT PCB Connectors

How can Float27 SMT PCB connectors be assembled?In what ways can printed circuit boards be connected to each other using Float27 SMT connectors?What PCB spacing options are available with the Float27 connectors?Why is the contact between the blade and the spring strip particularly reliable in Float27 connectors?What applications are Float27 PCB connectors used for?What tolerances do Float27 PCB connectors accommodate?Can the solder joints of the Float27 SMT connectors on the printed circuit board be inspected using automatic optical inspection (AOI)?Are ept PCB connectors RoHS-compliant?
How can Float27 SMT PCB connectors be assembled?

The Float27 connector system is manufactured using surface mount technology (SMT) and is therefore soldered directly onto printed circuit boards. Positioning pins on the underside of the Float27 connectors ensure precise positioning on the printed circuit board. ept also guarantees contact coplanarity of no more than 0.1 mm to ensure reliable soldering during assembly.

In what ways can printed circuit boards be connected to each other using Float27 SMT connectors?

By combining them with the various blade strips from the One27 connector family, connections between printed circuit boards can be established in both parallel and right-angle configurations.

What PCB spacing options are available with the Float27 connectors?

With the Float27 PCB connectors, a minimum PCB spacing of 26.1 mm and a maximum PCB spacing of 30.70 mm can be achieved. This is made possible, in part, by the large 2.4 mm over-insertion range. The male and female connectors can thus be pulled apart by up to 1.5 mm while still ensuring optimal and reliable contact.

One27 UEberstecksicherheit Pictogramm schwarzer Rand
Why is the contact between the blade and the spring strip particularly reliable in Float27 connectors?

In Float27 connectors, electrical contact is established via a double-pronged spring contact that encloses the contact pin of the female connector. Additionally, contact is made via the smooth, rolled surface of the spring contact. This prevents wear on the contact surface and the formation of metal shavings when inserting Float27 plugs.

One27 Federkontakt
What applications are Float27 PCB connectors used for?

Float27 connectors are suitable for all applications involving high shock and vibration loads. Tolerance compensation via the meander relieves stress on the soldering area, reduces stress on the solder joint, and ensures low displacement forces. Float27 connectors are also suitable for automated assembly processes or when multiple connectors are to be soldered onto a printed circuit board. Manufacturing tolerances are compensated for up to ±0.8 mm by the floating function.

What tolerances do Float27 PCB connectors accommodate?

Float27 connectors provide a high degree of tolerance compensation. This allows for an alignment tolerance of ±0.8 mm in both the longitudinal and transverse axes when mating the male and female connectors, as well as when they are mated. In addition, a contact overlap of up to 2.4 mm ensures this high tolerance compensation in the Z-direction as well.

Can the solder joints of the Float27 SMT connectors on the printed circuit board be inspected using automatic optical inspection (AOI)?

Yes, the contact design of the Float27 connectors is engineered for automatic optical inspection after soldering. The contacts on the Float27 PCB connectors are staggered, allowing automatic optical inspection to be performed from one side.

Are ept PCB connectors RoHS-compliant?

RoHS (Restriction of the Use of Certain Hazardous Substances) is the directive restricting the use of certain hazardous substances in electrical and electronic equipment.
We confirm that Float27 connectors from ept are compliant with RoHS Directive 2011/65/EU, as evidenced by the RoHS certificate. For more information, please visit RoHS & REACH.

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