Free Shipping Over $99
Square D 999315 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Square D
999315
Molded Case Circuit Breaker
Brand
Square D
SKU
999315
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D 999315 - 15A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
100A 3 Pole Molded Case Circuit Breaker
15A 2 Pole Molded Case Circuit Breaker
15A 3 Pole Molded Case Circuit Breaker
Description
Part of the legacy 999 frame series, the 999315 is a 3-pole molded case circuit breaker built for commercial power distribution. It delivers reliable thermal-magnetic trip functions for standard overcurrent protection. This bolt-on unit installs into Square D ML panelboards and compatible motor control centers. As an obsolete ML-1 type breaker, it serves as an exact replacement to keep older 600VAC infrastructure operational. Rated for 15 amps, it features a 10kAIC capacity at 600VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | 999315-R |
| Series | 999 |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D ML Panelboards, Square D Motor Control Centers |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Standards | UL 489, CSA C22.2 No. 5 |
|---|---|
| Approval | UL, CSA |
| Temp Rating | 40°C |
| Construction Features | Obsolete |
Product FAQs
7 answersWhich panelboards accept the Square D 999315 circuit breaker?
The 999315 is engineered specifically for legacy Square D ML panelboards and Square D motor control centers.
Is the Square D 999315 still in active production?
No, the 999315 is an obsolete, legacy circuit breaker. It is primarily sourced as an exact replacement component to maintain existing infrastructure rather than for new installations.
What is the frame type designation for the 999315?
This breaker belongs to the Square D 99 frame group and is commonly identified in legacy documentation as a Type ML-1 molded case circuit breaker.
How is the 999315 secured inside the panelboard?
This breaker features a bolt-on connection type. It must be bolted directly to the panelboard bus, ensuring a secure and reliable connection in older motor control centers and ML panels.
Does the 999315 come with load-side terminals?
Yes, this breaker is equipped with standard lug terminals for securing the load-side wiring.
Are the trip settings on the 999315 adjustable?
No, the thermal-magnetic trip unit on this breaker is fully fixed. Both the long-time thermal overload protection and the instantaneous magnetic short-circuit protection are factory set and cannot be adjusted in the field.
What type of protection does the LI trip function provide on this breaker?
The LI designation indicates that the breaker provides Long-Time (thermal) protection against sustained overcurrents and Instantaneous (magnetic) protection against sudden short circuits.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.