AZS-30
Aircraft Circuit Breaker
Description
AZS-30: 5–50 A family, 30 A execution
AZS-30 is a single-pole DC circuit breaker with a rated current of 30 A. The AZS series combines a manual switch with a thermobimetallic protective element and is intended to disconnect a consumer during overload or short-circuit conditions. Specified series data specifies a nominal voltage of 27 ±2.7 V DC and operation in circuits up to 30 V. The Cyrillic marking on an original unit is АЗС-30.
Full descriptionCollapse description
Construction and series data
The AZS mechanism is described as having no free trip. The positive conductor is connected to the fixed contact, so terminal orientation must be checked against the applicable wiring and maintenance data. Series values include a maximum mass of 90 g, contact voltage drop up to 180 mV at rated current, insulation withstand of 500 V AC at 50 Hz for one minute, and operation in any spatial position.
Environmental series data states an ambient range from −60 to +50 °C, relative humidity up to 98% at +25 °C, vibration from 10 to 300 Hz at acceleration up to 7g, and repeated-shock resistance up to 10g. These are reference values for the family and must be checked against the passport of the actual item, especially where an aircraft installation imposes a particular climatic execution or acceptance requirement.
Selecting the AZS-30 execution
The 30 A execution is intended for a circuit whose approved electrical data calls for that protective rating. A higher current number is not evidence that the unit can replace AZS-15, AZS-25 or AZS-40: conductor capacity, normal load and protection coordination must remain consistent with the aircraft wiring documentation. The accessible family table confirms the 30 A designation but does not state a separate, unambiguous trip interval for AZS-30.
Related catalog entries AZS-15 and AZS-40 are provided for comparison and navigation. They have different rated currents and are not presented as interchangeable substitutes.
Inspection and technical data basis
Before supply or installation, compare the complete marking, rated current, terminal condition, mounting points and housing with the removed unit. Check for cracks, overheating, corrosion, loose hardware or damaged threads. Electrical acceptance should follow TU16-526.015-73, the product passport and approved equipment documentation rather than a visual match alone.
A general explanation of this device class is available in the Wikipedia article on circuit breakers. More executions are listed in the Circuit Breakers category.
Technical details
- Product Type
- Single-pole DC circuit breaker
- Primary Designation
- AZS-30
- Original Cyrillic Designation
- АЗС-30
- Rated Current
- 30 A
- Number of Poles
- 1
All specificationsCollapse specifications
- Nominal Voltage
- 27 ±2.7 V DC
- Maximum Circuit Voltage
- 30 V DC
- Protective Element
- Thermobimetallic element
- Trip Mechanism
- Without free trip
- Connection Polarity
- Positive conductor to fixed contact
- Trip Characteristic
- Verify against the passport for the supplied execution
- Contact Voltage Drop
- Not more than 180 mV at rated current (series data)
- Insulation Withstand
- 500 V AC, 50 Hz, 1 min (series data)
- Insulation Resistance
- At least 20 MΩ cold; 6 MΩ heated; 2 MΩ after humidity exposure (series data)
- Terminal Temperature
- Not more than 120 °C at rated current (series data)
- Mechanical Endurance
- 10,000 rated-current switching cycles (series data)
- Overload Operations
- 91 automatic trips (series data)
- Short-Circuit Operations
- 5 interruptions (series data)
- Ambient Temperature
- −60 to +50 °C (series data)
- Relative Humidity
- Up to 98% at +25 °C (series data)
- Vibration
- 10–300 Hz, up to 7g (series data)
- Repeated Shock
- Up to 10g (series data)
- Minimum Atmospheric Pressure
- 12,133 Pa (series data for AZS-10 to AZS-40)
- Working Position
- Any
- Maximum Mass
- 90 g (series data)
- Technical Standard
- TU16-526.015-73
- Alternative Designation
- AZS30
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