Product Description
SB175 1/0 RED Multipole Power Connector (SKU AN-251) for electric lift truck parts; rated for up to 280A, accepts up to 1/0 AWG wire, silver-plated contacts, 600V max, rugged polycarbonate housing, keyed red design for safe mating, IP64 environmental protection, genderless assembly for interchangeable use.
Specifications
Electrical
| Rated Current Carrying Capacity | 280 amps continuous duty |
| Rated Voltage | 600 volts AC/DC maximum |
| Connector Type | SB175 multipole power connector |
Material
| Environmental Protection | IP64 rated (dust and splash proof) |
Part Numbers
| Manufacturer Part Number | 949 |
Frequently Asked Questions
Q: What is the AN-251 connector and what equipment does it fit?
A: The AN-251 is an SB175 1/0 red multipole power connector rated for 280 amps continuous duty. It is used on electric pallet jacks, walkie stackers, and other battery-powered material handling equipment from Crown, Toyota, Raymond, Yale, Hyster, and similar manufacturers. Verify your equipment uses SB175 connectors before ordering.
Q: What wire gauge does the AN-251 accept and why is 1/0 important?
A: The AN-251 accepts up to 1/0 AWG wire. 1/0 AWG is large-gauge copper wire that minimizes voltage drop on high-current circuits. For 280-amp applications, proper wire gauge is critical to prevent overheating, voltage sag, and battery damage. Do not use smaller wire gauges as this creates fire hazard and reduces system efficiency.
Q: What are the voltage and current ratings for the AN-251?
A: The AN-251 is rated for 600 volts AC/DC maximum with 280 amps continuous duty capacity. Silver-plated contacts ensure reliable current transfer at high amperage without excessive heat. Do not exceed these ratings as damage to contacts and housing will occur.
Q: What does keyed red design mean on the AN-251?
A: Keyed red design means the AN-251 connector has a red color-coded housing with mechanical keying that prevents connection to non-red connectors. Red designates a specific battery terminal or circuit polarity. Keying ensures safe mating and prevents reverse polarity connections that could damage equipment or batteries.
Q: What does IP64 environmental protection mean for the AN-251?
A: IP64 rating means the AN-251 connector is dust-proof and splash-resistant. It is safe for use in wet dock areas, outdoor loading zones, and cold storage environments. The polycarbonate housing resists UV and chemicals. IP64 does not mean waterproof—full submersion will eventually degrade internal seals and contacts.
Q: What maintenance and lifespan should I expect from the AN-251?
A: Inspect the AN-251 annually for cracks, discoloration, or corroded contacts. Clean mating surfaces with a dry cloth. Replace if contacts show green or white corrosion, seals shrink, or mating becomes difficult or creates intermittent connections. Expected lifespan is 5 to 10 years with normal warehouse use. Do not attempt to refinish corroded silver-plated contacts as permanent plating cannot be restored.