Technical Glossary

Key terms and definitions for all catalogues

A     B     C     D     G     I     L     M     N     O     P     R     S     T     W

A

Ambient temperature

Temperature of the air or other medium in which a connector or a corresponding cable assembly is intended to be used.

Autoclavability
AWG

American Wire Gauge

B

Base curve

A current-carrying capacity curve metrologically determined according to the method described in IEC 60512-5-2:2002 (DIN EN 60512-5-2:2003-01) depending on the permissible limit temperature of the materials.

C

Chemical resistance

Chemical resistance is the ability of a material to protect itself against chemical attack or solvent reaction. In contrast to corrosion, there is no material removal, which is particularly typical for plastics and elastomers.

Adhesives, cleaning agents or other chemicals are often used on our products within the scope of general deployment and further handling. Contact with unsuitable chemicals may have an adverse effect on the mechanical and electrical properties of the insulation and housing materials. The connector specifications may no longer be sustainable. Please observe our handling suggestions and technical instructions as given in this catalog or corresponding assembly instructions.

Clearance distance

The shortest distance by air between two conductive parts (according to IEC 60664-1:2007).

Creepage distance

The shortest distance between two conductive parts along the surface of a solid insulation material (according to IEC 60664-1:2007). This factors in all elevations and recesses in the insulator, as long as defined minimum dimensions are on hand. 

Crimp barrel

A terminal sleeve which can accommodate one or more conductors and be crimped by a crimping tool.

Crimp connection (crimp termination)

The permanent, non-detachable and solder-free mounting of a contact to a conductor via deforming or shaping under pressure to make a good electrical and mechanical connection. Executed with crimping tool, press or automatic crimping machine.

Coding (mechanical)

Geometry detail that prevents interchangeability of otherwise identical connectors.This is useful when two or more identical connectors are attached to the same device.
 

Connectors

An element which enables electrical conductors to be connected and is intended to create and/or separate connections with a suitable counterpart (according to IEC 61984:2008 (VDE 0627:2009-11)). If not otherwise specified, these are connectors without breaking capacity (COC).

Connector with breaking capacity (CBC)

Connector that may be mated or unmated during intended use, live or under load (according to IEC 61984:2008 (VDE 0627:2009-11)).
 

Connector without breaking capacity (COC)

Connector which is not deemed to be engagend or disengaged in normal use when live under load (according to IEC 61984:2008 (VDE 0627:2009-11)).

Contact resistance

The contact resistance is the resistance at the contact zone of an electrical contact pair. The contact resistance is significantly lower than the total resistance (refer to total resistance). The specifications are average values.

Cores

Electrical conductor, solid wire or multi-wire strand, with insulation as well as any conductive layers. Cables or leads may have one or more cores.

Current-carrying capacity (Nominal current and maximum continuous current)

The value is derived from an adequately dimensioned connection cable in accordance with IEC 60228:2004 (VDE 0295:2005-09; class 5), so that a significant temperature increase is not incurred. The indicated temperature increase takes place through the contact. The specifications are average values.

D

Delivery form

Connectors can be delivered in assembled form or as individual parts.

Derating curve

only refer to page!
See page XX

Derating measurement method in accordance with IEC 60512-5-2:2002 (DIN EN 60512-5-2:2003-01)

only refer to page!
See page XX

G

General note

The connectors and cable assemblies listed in this catalog are generally designed as connectors without breaking capacity unless otherwise stated. The rated voltage specification given on the respective data sheet must be respected. Suitable precautionary measures must be taken to ensure that people do not come into contact with live conductors during installation and operation. All entries in this catalog were thoroughly reviewed before printing. ODU reserves the right to make changes based on the current status of knowledge without prior notice and without being obliged to provide replacement deliveries or refinements of older designs.

I

Insertion and Withdrawal force

The force required to fully insert or withdraw pluggable elements without the influence of a coupling or locking device.  

Insulator

Part of a connector that separates conductive parts with different potential, usually identical to the contact carrier.

L

Lubrication

All standard contacts are lubricated at the factory. We recommend using the ODU Electrical Contacts Service kit.

M

Mating cycles

A mating cycle consists of one insertion and withdrawal action of both connector parts with each other. The given values are only valid under the following conditions: clean environment, adequate radial alignment, flawless counter contact pins.

Max. continuous current

The metrologically determined amperage at room temperature (approx. 20° C) which increases the contact temperature to the limit temperature. The values specified in the catalog apply to either individual contacts or completely assembled inserts / modules, as indicated. Refer to page xx for the derating curve, if a different ambient temperature is valid

N

Nominal Current

See Rated Current 

Nominal single contact current load

The current-carrying capacity which each individual contact can be loaded with on its own

Nominal voltage

The nominal voltage of the power source for which the connector is being used. The nominal voltage may not be higher than the rated voltage of the connector.

O

Operating Temperature

Permissable temperature range between the uppermost and lowermost limits. This includes contact heating through current-carrying capacity.

Operating voltage

The operating voltage is the voltage supply at the device. The operating voltage may not be higher than the rated voltage of the connector.

Overvoltage category

Numeral defining a transient overvoltage condition as defined in Table F.1 in IEC 60664-1:2020 (VDE 0110-1:2022-07). This table provides the value of the rated impulse voltage that must be met.

P

PCB termination

A conductive connection between the PCB and an element in through-hole assembly, THT (through-hole technology).

Pollution Degree

Numerical value indicating the expected pollution of the micro-environment. The pollution levels 1-4 were defined. (Pollution: any deposit of solid, liquid or gaseous foreign matter that may reduce the electrical strength or surface resistance of the insulation; micro-environment: immediate vacinity of the insulation, which in particular influences the dimensioning of the creepage distances). See IEC 60664-1:2007 (VDE 0110-1:2008-01)).

Pollution degree 1

No or only dry, non-conductive pollution is present. The pollution has no influence. For example, this is common for computer systems and measuring instruments in clean, dry, or air-conditioned rooms.

Pollution degree 2

(= standard, if no specific pollution degree is indicated)
Only non-conductive pollution is present. However, temporary conductivity due to condensation must be anticipated. For example, this is common for devices in laboratories, residential, sales, and other business areas.

Pollution degree 3

Conductive pollution is present or dry, non-conductive pollution that will become conductive because condensation is expected. For example, this is common for devices in industrial, commercial, and agricultural operations, unheated storage areas, and workshops.

Printed circuit board (PCB)

A PCB is a carrier for electronic components. It serves the purposes of mechanical mounting and electrical connection.

R

Rated current (nominal current)

only refer to page!
See page XX [Chapter: Current load of turned contacts].
TEXT für Derating Seite:
The measured current which flows through all contacts simultaneously and continuously when the largest permissible conducting wires are connected and the temperature at the contacts has increased by 45 Kelvin. The rated current is determined according to the Derating Measurement Method in accordance with IEC 60512-5-2:2002 (DIN EN 60512-5-2:2003-01) and derived from the Derating Curve.

Rated impulse voltage

The specified rated impulse voltage confirms the dielectric withstand voltage and thereby the withstand capability of its insulation against transient overvoltages according to the standard by applying the test voltage according to Table F.6 in IEC 60664-1:2020 (VDE 0110-1:2022-07) over a defined time range.

Rated voltage

The rated voltage which the manufacturer specifies for a connector and which the operating and performane features relate to

Reduction factor

Based on VDE 0298-4:2013-06, connectors and cables with more than 5 contacts have a higher heating rate compared to individual contacts. For this reason, the aforementioned standard is calculated with a reduction.

S

Sliding force

Please refer to Insertion and Withdrawal force.
The higher value of the insertion force is caused by the “attachment peak”. Subsequently, only the pure sliding force has an effect. In the case of lamella contacts, the data refers to contacts in the lubricated state (status at delivery) and after approx. 30 mating cycles. The forces are/may be higher in new condition (lubricated). In the case of springwire contacts, the data refers to contacts in new condition. The data represents average values with a potential fluctuation of ± 50 %.

Solder connection (solder termination)

Termination technology in which a molten additional metal (solder) with a lower melting point than the base materials to be connected is used to attach two metallic materials to one another. 

Spindle locking

Ergonomic locking of the housings with an easy-to-operate precsision locking spindle. This spindle enables easy closing and opening of the housings with a single turning movement. The mating and sliding forces which are thereby overcome ease handling significantly. For relubrication, we recommend the ODU Electrical Contacts Service Kit.

Stranded wire

The stranded wire is an electrical conductor consisting of thin individual wires and is therefore easy to bend.

Surge Current Load

One-time impulse current with a 10 ms load duration.

Surge voltage

The generic term for high impulse test voltages used to test power supply equipment.

T

Termination cross-section

The specified cross-sections correspond to a a “fine-wire” conductor structure (7/19 wire) according to AWG (ASTM B258-14) or to a “fine-wire” conductor structure pursuant to IEC 60228:2004 (VDE 0295:2005-09; Class 5), borderline conductor structures require a separate review. 

Termination technologies

Methods for connecting the leads to the electro-mechanical element, such as solder-free connections pursuant to IEC 60352 (DIN EN 60352): crimp, screw connection etc. or soldering connection.

Test voltage

The test voltage which a connector or a corresponding cable assembly can withstand under defined conditions without dielectric breakdown or flashover.

Tightness IEC 60529:1989 (VDE 0470-1:2014-09)

W

Wire

Solid conductor