AA2-B0-34-650-9D1-C
Carling A-Series 50A double-pole hydraulic-magnetic supplementary protector with slant terminals.
SKU CB-AA2-50A-SP
Carling A-Series 50A double-pole hydraulic-magnetic supplementary protector with slant terminals. MPN AA2-B0-34-650-9D1-C. UL 1077 Recognized; CSA Accepted.
- Carling part number
- AA2-B0-34-650-9D1-C
- Current
- 50A
- Poles
- 2
- Protection
- Hydraulic-magnetic supplementary protector
- Trip response
- Medium delay (code 34)
- Terminal
- Slant
- Color
- Black
- Series
- A-Series
Stocked items typically ship the next business day from our US warehouse. 30-day returns on unused stocked items. Exclusions apply. Return policy · Shipping policy
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About this product
AA2-B0-34-650-9D1-C is a Carling A-Series 50A double-pole hydraulic-magnetic component supplementary protector. Its complete ordering identity, rather than the family limits alone, should be used for selection.
Product overview
- Series and poles: A-Series AA2; 2 poles
- Protection: Series-trip hydraulic-magnetic supplementary protector
- Rated current: 50A
- Trip response: Medium delay (code 34)
- Old or replaced part number: AA2-X0-08-539-XD1-C
Verified specifications
- Trip-free: Trips on overload even when the actuator is held ON
- Trip indication: Actuator moves positively to OFF on electrical trip
- Insulation resistance: Minimum 100 megohms at 500 VDC
- Dielectric strength: 1,500 VAC, 60 Hz for one minute between electrically isolated terminals
- Mechanical endurance: 10,000 ON-OFF operations at six operations per minute with rated current and voltage
Installation details
- Terminal orientation: Slant
- Terminal configuration: Code 9 CGM slanted rear terminal; 10-32 combination binding-head screw
- Mounting: Use the mounting arrangement encoded by the complete part number
Environmental durability
- Operating temperature: -40 C to +85 C
- Shock: 100 G, 6 ms sawtooth, MIL-STD-202 Method 213 Condition I
- Vibration: 0.060-inch excursion at 10-55 Hz and 10 G at 55-500 Hz, Method 204C Condition A
- Salt spray: Method 101 Condition A, 5% NaCl for 96 hours
- Thermal shock: Method 107D Condition A, five cycles from -55 C to +85 C
Agency recognition and selection
- Configuration: UL 1077 Recognized; CSA Accepted
Part-number breakdown
- Reference manual
- Carling A-Series datasheet, UL 1077 Handle Ordering Scheme (p. 6)
- Complete manufacturer part number
- AA2-B0-34-650-9D1-C
- 1. Series
- A — A-Series
- 2. Actuator
- A — Handle, one per pole
- 3. Poles
- 2 — 2 poles
- 4. Circuit
- B — Series trip (current)
- 5. Auxiliary/alarm switch
- 0 — Without auxiliary switch
- 6. Frequency and delay
- 34 — DC / 50–60 Hz medium
- 7. Current rating code
- 650 — 50 A
- 8. Terminal
- 9 — Slant orientation
- 9. Actuator color and legend
- D — Black actuator, white legend (ON–OFF)
- 10. Mounting / barriers
- 1 — Two 6-32 × 0.195 in threaded inserts per pole; no barriers
- 11. Agency approval
- C — UL Recognized; CSA Accepted
Product details
- Carling part number
- AA2-B0-34-650-9D1-C
- Current
- 50A
- Poles
- 2
- Protection
- Hydraulic-magnetic supplementary protector
- Trip response
- Medium delay (code 34)
- Terminal
- Slant
- Color
- Black
- Series
- A-Series
- Voltage
- Not specified
- Amperage
- 50A
- Trip Free
- Yes - trips on overload with actuator held ON
- Illumination
- Non-illuminated
- Product Type
- Component supplementary protector
- Actuator Type
- Handle, one per pole
- Housing Color
- Black
- Terminal Type
- Slant
- Actuator Color
- Black
- Actuator Style
- Toggle
- Protection Type
- Hydraulic-magnetic
- Trip Indication
- Positive OFF-position indication on electrical trip
- Pole Configuration
- Double pole
- Current Rating Code
- 650
- Dielectric Strength
- 1,500 VAC, 60 Hz, 1 minute between electrically isolated terminals
- Mechanical Endurance
- 10,000 ON-OFF operations at 6 per minute with rated current and voltage
- Replaces Part Number
- AA2-X0-08-539-XD1-C
- Insulation Resistance
- Minimum 100 megohms at 500 VDC
- Operating Temperature
- -40 C to +85 C
- Terminal Configuration
- Code 9 CGM slanted rear terminal; 10-32 combination binding-head screw
- Manufacturer Part Number
- AA2-B0-34-650-9D1-C
Shipping & returns
- Stocked items typically ship the next business day from our US warehouse.
- 30-day returns on unused stocked items. Exclusions apply. See policy
- Custom and quoted items are non-returnable once production begins.
Warranty
Backed by the original manufacturer’s warranty plus our workmanship guarantee on assembled harnesses. Contact us with your invoice and we’ll coordinate any covered repair or replacement.
Read the full warranty termsInstallation guidance
These notes are a starting point. They cover the common considerations for a marine install — they don't replace a project review against your specific boat, helm, and circuit list.
- Disconnect the battery and verify zero voltage at the working point before cutting or splicing.
- Match wire gauge to the breaker and the run length, not just to the load.
- Use marine-rated, tinned terminals and seal every crimp against moisture and vibration.
- Route conductors clear of heat sources and protect them where they pass through bulkheads.
Technical support
Need help choosing the right part?
Our marine electrical team can review your setup and recommend compatible products. Send a photo, a sketch, or your circuit list and we'll come back with a parts list that fits the boat.
Certifications & training
- ABYC-aware build practices
- OEM-grade marine wire & terminals
Additional capabilities are based on hands-on experience building marine wiring systems rather than third-party certification.
Share your project
Have you used this product in a project? Send us photos of your install for consideration in our project gallery.
Why buy from Common Ground Marine
- 20+ years building marine wiring harnesses, panels, and shore-power systems.
- Engineers — not a phone tree — review every custom build before parts are cut.
- OEM-grade components: tinned copper, sealed connectors, marine-rated jackets.