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Description
Eaton Cutler-Hammer RD316T33WS21 1600A 3 Pole Molded Case Circuit Breaker – Bolt-On Mount – 600VAC – S21 Shunt Trip OptionThe Eaton Cutler Hammer RD316T33WS21 is a high performance molded case circuit breaker designed for precise protection in industrial and commercial electrical systems. Built on the RD R Frame platform, it integrates the Digitrip RMS 310 electronic trip unit to reliably detect and interrupt overloads, short circuits, and instantaneous faults. This model features LS protection functions for long delay and short delay trips, and includes the S21 option,
The Eaton Cutler-Hammer RD316T33WS21 is a high-performance molded case circuit breaker designed for precise protection in industrial and commercial electrical systems. Built on the RD R-Frame platform, it integrates the Digitrip RMS 310 electronic trip unit to reliably detect and interrupt overloads, short circuits, and instantaneous faults.
This model features LS protection functions for long-delay and short-delay trips, and includes the S21 option, which equips the breaker with a 24 VAC or VDC shunt trip mounted on the right pole with rear exit. This feature allows remote breaker tripping for enhanced system control and safety.
Voltage and Ratings
- Rated Current: 1600 Amperes
- Maximum Voltage: 600 VAC
- Frequency: 50/60 Hz
- Interrupting Capacity:
-
- 125 kA at 240 VAC
- 65 kA at 480 VAC
- 50 kA at 600 VAC
- Temperature Rating: 1600A at 40°C
- Application Rating: Rated for 100% continuous operation
Key Specifications
- Digitrip RMS 310 electronic trip unit for accurate fault detection
- LS protection functions (Long Delay, Short Delay)
- Adjustable long-delay pickup via rating plug
- Short-delay protection with selectable I²t or flat response
- Includes S21 Shunt Trip Option (24 VAC/VDC, right pole mounted, exiting rear)
- High interrupting capacity suitable for commercial and industrial systems
Technical Specifications
- Breaker Type: Molded Case Circuit Breaker (MCCB)
- Model Number: RD316T33WS21
- Frame Type: R Frame
- Trip Unit Type: Electronic Non-Interchangeable – Digitrip RMS 310
- Protection Functions: LS (Long Delay, Short Delay)
- Long Delay Pickup: Adjustable via rating plug
- Short Delay Response: I²t response or flat response selectable
- Trip Setting Range: 2–8 × Continuous Ampere Rating
- Number of Poles: 3 Pole
- Connection Type: Bolt-On
- Optional Configuration: S21 Shunt Trip – 24 VAC/VDC, right pole mounted, rear exit
Product Data
- Manufacturer: Eaton / Cutler Hammer
- Series: RD
- Rated Current: 1600A
- Maximum Voltage: 600VAC
- Mounting Type: Bolt-On Installation
- Warranty: 1 Year
Important Notice:
This breaker requires a compatible rating plug for proper operation. Optional accessories, including the S21 shunt trip, can be installed before shipment to meet your system configuration needs.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Quality
Color: Black
This is by far the best frother I've used. Battery life is great. Its UX is excellent. Feels nice in the hand and has great power. Also like the on/off button as opposed to haveing to hold a switch down. Looking forward to getting their s3 scale.
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Reviewed in the United States on April 11, 2026
★★★★★ 4
Overall good frother
Color: Black
Bought the Maestri and the Zulay frother to test which one is better since both had good reviews. Returned the Zulay (see Zulay review) and kept the Maestri. Been using it for a few days now and works well. Mixes chai and hot chocolate well. It has one speed that is a good speed to mix, but not so fast that it causes the drink to spill over the top as long as the cup is filled to about 80% full. Because I tend to use the tall 20 oz Contigo autoseal cups, it could benefit from offering longer attachments to reach the bottom of the cup (note: that I did not find any company that offers longer attachment arms).
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Reviewed in the United States on January 28, 2026
★★★★★ 5
LOVE this frother and the creamy results!
Color: Black
I LOVE this gadget! And I'm not a gadget person.
Since I got it a few days ago, I've switched from using my Nespresso coffee maker, which uses pods and which I really like, to using Starbucks instant coffee packets (cheaper and more environmentally friendly than pods). I put a packet of the coffee and two packets of Equal in a cup, add half and half, then use this frother to mix them. Within a few seconds -- no more than 5, if that -- I have a thick mound of creamy froth. Then I had the water to finish making the coffee. Fantastic. This thing is so easy and fun to use.
This is not the cheapest frother available. I wanted a rechargeable unit that has sufficient power to make nice, creamy froth. Also, I didn't want to spend $10 and have the thing break and have to replace it. Reviews suggest the cheaper ones are fine if you don't regularly use a frother. I never used one before and didn't really think I would use it very often. But I like it so much, I've been using it twice a day.
Also, I first saw one in use while traveling in India. Another guest at my small hotel had one, which she used to make a latte with rather than drink the rather tepid offering at the more tea-oriented hotel. That's when I decided to get one. I'll be taking it on future trips. Some come with travel containers; this one didn't.
The only learning curve was making sure the cup or pitcher for the cream is deap enough not to splash out the cream. I think I'm actually using a little less cream than I used to because the volume increases so much. I use cold cream, not heated (I used to heat it in the microwave when I was using the NesPresso.) I find I like the initial contrast with the cold cream at the top, then I stir it down into the coffee. The Starbucks coffee is excellent. I've used it for iced lattes in the past, so I knew it was good. I can hardly wait for a heat wave to make them with this frother.
I did try to beater attachment in eggs when I was making an omelet. Not worth the trouble -- first, the bowl I was using to beat the eggs was too shallow and egg got all over. Second, a fork works just as well. If I were whipping cream, I would definitely use it.
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Reviewed in the United States on March 7, 2026
★★★★★ 5
Best frother ever
Color: White
This brother is wickedly powerful you don't need to use it for very long to get phenomenal frothing results
Incorporates ingredients quickly
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Works great and so much fun!
Color: Black
How did I live without this for so long? I love this little gadget! It gets used multiple times a day. It's not only great for frothing milk but it will whip eggs for a recipe and stir other ingredients as well. People who have complained that the stirring attachment was missing a piece did not read the description. The picture clearly shows there is no "boot" on that attachment, you don't want that one to spin like the frother. The Frother holds a charge for quite a while as well. I use mine multiple times a day and it is still holding a charge after weeks of daily use. Great item!
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Reviewed in the United States on February 15, 2026
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