Other Products / Services #4956881

Throughout the years, DARE has supported the military, aerospace and ground power industry with custom and unique electro-mechanical relays. Whether for a new application or a retrofit, DARE specializes in meeting the customers needs for special electro-mechanical relays.

Working with the customer, DARE can supply an electro-mechanical relay to a customers specific requirement whether they need a special footprint, mounting arrangement, or enclosure, DARE will work with the customer to meet their exact needs.

In addition, DARE will work with a customer to supply a fit, form, and functional replacement for an old, obsolete, or discontinued electromechanical relay. These fit, form, and functional relays will fully satisfy the physical, electrical, mechanical, and environmental performance requirements of the original device and allow the military or other user to keep aging aircraft flying and systems operational.

Many of the electro-mechanical relays supplied by DARE are designed to meet the stringent requirements of MIL-R-6106 (now MIL-PRF-6106) and MIL-R-5757 and perform under the severe environmental requirements of aerospace or military usage, and several of DAREs electromechanical relays are listed on the Qualified Products List (QPL) for MIL-PRF-6106. These relays include: AN3306-2 and MS25917-1.

DAREs frequency sensors and monitors are available in both AC powered and DC powered models in a wide variety of standard or custom enclosures.

Used in aircraft, ground support equipment (GSE), ground power applications, and other military and industrial applications, DARE frequency sensors, monitors, and frequency sensing relays will protect equipment that is sensitive to fluctuations in power line frequency from damage due to over and or under frequency conditions.

When the power line frequency is within the specified limits, the output of the frequency monitor will energize. When the frequency is over or under or outside the specified frequency range, the output relay of the frequency sensor will de-energize.

Among the many various types of frequency sensors, DARE offers:
400 Hz fixed and adjustable underfrequency and overfrequency sensors
400 Hz fixed and adjustable band pass frequency sensors
60 Hz fixed and adjustable underfrequency and overfrequency sensors, and
60 Hz fixed and adjustable band point frequency sensors

Design features include:
Built-In Hysteresis to eliminate chatter due to small frequency changes, and
Maximum circuit flexibility to meet your needs

In addition, DARE can manufacture frequency sensors, monitors, and frequency sensing relays that do not require supplementary (other than input) power to operate.

Continuously monitor single or three-phase power lines for over or under voltage conditions with DAREs AC voltage sensors, voltage monitors, and voltage sensing relays. DAREs complete line of AC Voltage Sensors will protect system equipment and circuitry from voltage that is hazardous or unsuitable for operation. Whether in an airborne, ground support, military, or other high reliability application, DARE AC Voltage Sensors can be used to monitor for an under-voltage or over-voltage condition or a voltage window. In the event the voltage sensor detects an undesirable voltage condition, the output of the voltage sensor can be used to activate alarms, shed loads, or shutdown systems.

DARE AC Voltage Sensors, Voltage Monitors, and Voltage Sensing Relays are available in:
Single or three phase AC voltage sensing models (Delta or Wye)
50 Hz, 60 Hz, or 400 Hz operation
Under-voltage, over-voltage, or voltage band models
Lowest phase, highest phase, or three phase averaging

In addition, DARE AC Voltage Sensors, Voltage Monitors, and Voltage Sensing Relays can be:
Powered from sensing input lines or from separate AC or DC supply

And, are available with
Time delays on pull-in andor drop-out or with customized voltage-time trip curves
Solid State normally open outputs or
Relay outputs in SPDT, DPDT, 3PDT, or 4PDT configurations and contact ratings of 2, 5, 10 or 25 Amps

DARE AC Voltage Sensors come in wide variety of finishes, enclosures, connectors, and mounting arrangements and custom configurations are available. The table below describes just some of the various types of voltage sensors available

DARE Electronics solid state relays incorporate advanced microelectronic hybrid technology and are available from low level to 50 amps.

Solid state relays have distinct advantages over electro-mechanical devices including: no contact bounce, arcing or flashing; immunity to contact contamination and oxide formation in dry or normally open circuits; and immunity to shock and vibration thus preventing unwanted contact closures. Furthermore, DARE's solid state relays yield much longer switching life, higher reliability, and reduced electromagnetic radiated and conducted emissions.

Features include:
Optical or transformer input to output isolation
Zero voltage turn-on; zero current turn-off
Logic compatible input current levels
3 phase load switching capabilities
Hybrid microelectronic design
High transient immunity
Fast switching speed
Snap action switching

General Specifications
While DAREs solid-state relays are available in a wide variety of custom configurations, these general specifications represent some of DARE's current product capabilities:

Solid-State Relays
Input Voltages
From 3 to 200 VDC or 3 to 440 VAC

Temperature Limits
-55C to 110C (Optical)
-55C to 125C (Transformer)

Load Voltages
Up to 500 Volts AC or DC

Input to Output Isolation
Up to 4000 VRMS

Load Currents
From low level to 50 amperes

Available Outputs
(AC) Triac or inverse-parallel SCR's, 1 or 3 phase
(DC) SCR, MOSFET, Darlington or bipolar transistor

DARE Electronics designs and manufactures flashers to MIL-F-26301 and other flashers with solid-state or electro-mechanical outputs.

Used on military, airborne, or ground support applications, DARE flashers and recycle timers can periodically turn on and off navigation, position, warning or indicating light or sense and indicate a malfunction in certain systems and activate an alarm.

FA-18 Aircraft Navigation Light FlasherHermetically sealed and encapsulated for immunity to shock, vibration and environmental extremes, DARE flashers are designed and constructed to insure conformity with applicable military specifications, including:
Temperature, vibration, shock, acceleration, and altitude per MIL-STD-810
Voltage Transients per MIL-STD-704, and
EMI per MIL-STD-461

Design features and option include:
28 VDC or 115 VAC 50 Hz, 60 Hz, or 400 Hz operation
Single or multiple independent output channels
Solid state or SPDT, DPDT, 3PDT, or 4PDT electromechanical outputs

Available in a wide variety of finishes, enclosures, connectors, and mounting arrangement, DARE flashers and recycle timers can be powered from sensing input lines or from separate AC or DC supply and supplied in inductive & lamp load models.

In addition, DARE can supply flashers and recycle timers that can be used as direct replacements for thermal or motor driven timers.

Current sensors are designed to monitor the presence or absence of AC or DC current and are available in an assortment of standard & custom models with hermetic or gasket seal models designed to withstand severe environmental conditions.

Using internal electronic circuits to detect, monitor or sense AC or DC current, DARE current sensors and monitors can open or close a circuit when a certain pre-set over or under current condition exists or the current falls outside the specified current range.

Typical AC & DC current sensor specifications and ratings include:
115220440 VAC
122848 VDC
0 10 Amperes with higher current limits available with the use of an external current transformer

Output contacts are available with ratings of:
2 amp, 5 amp, 10 amp, or 25 amps SPDT through 4PDT

Output contacts can be set to trip for:
Under current, over current, or over under (band pass) condition

In addition, DARE AC and DC Current Sensors can be:
Powered from sensed input lines or from auxiliary AC or DC power

DARE has a complete line of AC or DC operated power monitors available in numerous package styles including 50 Hz, 60 Hz, and 400 Hz models. In addition, DARE has a series of external aircraft power monitors that continuously monitor the quality of electrical power in aircraft electrical systems, ground power equipment, auxiliary power units (APUs), and other equipment for pre-determined over under voltage conditions, over under frequency conditions, loss of phase, improper phase sequence or phase rotation.

AC DC Power Monitors
Available in Single or Three (3) Phase (Wye or Delta) models, DARE AC or DC operated power monitors can be customized or provided in one of DAREs standard enclosure styles with a variety of optional mounting arrangements, connectors, and finishes. Learn more about AC DC Power Monitors.

External Aircraft Power Monitors
Designed to meet the requirements of MIL-STD-704 for aircraft and missile applications and MIL-E-24021F (now MIL-PRF-24021), DAREs external aircraft power monitors will meet or exceed the severe environmental requirements of MIL-STD-810.

DC voltage sensors monitor input voltages ranging from 3 to 500 volts DC with a trip point accuracy of up to 1% in airborne, military and ground power applications. Using internal electronic circuits to detect, monitor andor sense DC voltage, DARE DC voltage sensors, monitors, and voltage sensing relays can open or close a circuit when a certain pre-set over or under voltage condition exists or the DC voltage falls outside the specified voltage band window.

The most common DC voltage sensors are designed to monitor 28 VDC and voltage transients per MIL-STD-704, but DAREs DC voltage sensors can be highly customized for a given application.

D.C. Voltage SensorDARE DC Voltage Sensors, Voltage Monitors, and Voltage Sensing Relays are available in:
Under-voltage, over-voltage, or voltage band models
Hermetic or gasket seal models designed for demanding environmental conditions

In addition, DARE DC Voltage Sensors, Voltage Monitors, and Voltage Sensing Relays can be:
Powered from sensing input lines or from separate AC or DC supply

DC Current Sensor
And, are available with
Time delays on pull-in andor drop-out or with customized voltage-time trip curves
Solid State normally open outputs or
Relay outputs in SPDT, DPDT, 3PDT, or 4PDT configurations and contact ratings of 2, 5, 10 or 25 Amps

DARE DC Voltage Sensors come in wide variety of finishes, enclosures, connectors, and mounting arrangements and custom configurations are available. The table below describes just some of the various types of voltage sensors available.

DARE Electronics designs and manufactures flashers to MIL-F-26301 and other flashers with solid-state or electro-mechanical outputs.

Used on military, airborne, or ground support applications, DARE flashers and recycle timers can periodically turn on and off navigation, position, warning or indicating light or sense and indicate a malfunction in certain systems and activate an alarm.

FA-18 Aircraft Navigation Light FlasherHermetically sealed and encapsulated for immunity to shock, vibration and environmental extremes, DARE flashers are designed and constructed to insure conformity with applicable military specifications, including:
Temperature, vibration, shock, acceleration, and altitude per MIL-STD-810
Voltage Transients per MIL-STD-704, and
EMI per MIL-STD-461

Design features and option include:
28 VDC or 115 VAC 50 Hz, 60 Hz, or 400 Hz operation
Single or multiple independent output channels
Solid state or SPDT, DPDT, 3PDT, or 4PDT electromechanical outputs

Available in a wide variety of finishes, enclosures, connectors, and mounting arrangement, DARE flashers and recycle timers can be powered from sensing input lines or from separate AC or DC supply and supplied in inductive & lamp load models.

In addition, DARE can supply flashers and recycle timers that can be used as direct replacements for thermal or motor driven timers.

DAREs frequency sensors and monitors are available in both AC powered and DC powered models in a wide variety of standard or custom enclosures.

Used in aircraft, ground support equipment (GSE), ground power applications, and other military and industrial applications, DARE frequency sensors, monitors, and frequency sensing relays will protect equipment that is sensitive to fluctuations in power line frequency from damage due to over and or under frequency conditions.

When the power line frequency is within the specified limits, the output of the frequency monitor will energize. When the frequency is over or under or outside the specified frequency range, the output relay of the frequency sensor will de-energize.

Among the many various types of frequency sensors, DARE offers:
400 Hz fixed and adjustable underfrequency and overfrequency sensors
400 Hz fixed and adjustable band pass frequency sensors
60 Hz fixed and adjustable underfrequency and overfrequency sensors, and
60 Hz fixed and adjustable band point frequency sensors

Design features include:
Built-In Hysteresis to eliminate chatter due to small frequency changes, and
Maximum circuit flexibility to meet your needs

In addition, DARE can manufacture frequency sensors, monitors, and frequency sensing relays that do not require supplementary (other than input) power to operate.

Current sensors are designed to monitor the presence or absence of AC or DC current and are available in an assortment of standard & custom models with hermetic or gasket seal models designed to withstand severe environmental conditions.

Using internal electronic circuits to detect, monitor or sense AC or DC current, DARE current sensors and monitors can open or close a circuit when a certain pre-set over or under current condition exists or the current falls outside the specified current range.

Typical AC & DC current sensor specifications and ratings include:
115220440 VAC
122848 VDC
0 10 Amperes with higher current limits available with the use of an external current transformer

Output contacts are available with ratings of:
2 amp, 5 amp, 10 amp, or 25 amps SPDT through 4PDT

Output contacts can be set to trip for:
Under current, over current, or over under (band pass) condition

In addition, DARE AC and DC Current Sensors can be:
Powered from sensed input lines or from auxiliary AC or DC power

DARE has a complete line of AC or DC operated power monitors available in numerous package styles including 50 Hz, 60 Hz, and 400 Hz models. In addition, DARE has a series of external aircraft power monitors that continuously monitor the quality of electrical power in aircraft electrical systems, ground power equipment, auxiliary power units (APUs), and other equipment for pre-determined over under voltage conditions, over under frequency conditions, loss of phase, improper phase sequence or phase rotation.

AC DC Power Monitors
Available in Single or Three (3) Phase (Wye or Delta) models, DARE AC or DC operated power monitors can be customized or provided in one of DAREs standard enclosure styles with a variety of optional mounting arrangements, connectors, and finishes. Learn more about AC DC Power Monitors.

External Aircraft Power Monitors
Designed to meet the requirements of MIL-STD-704 for aircraft and missile applications and MIL-E-24021F (now MIL-PRF-24021), DAREs external aircraft power monitors will meet or exceed the severe environmental requirements of MIL-STD-810.