Pacific Scientific


Pacific Scientific

S31HNNA-HSNS-04 Image 1


The S31HNNA-HSNS-04 is a high performance servo motor in the S Motor Series by Pacific Scientific. This compact, brushless motor is known for its ability to support a wide range of torque, from 0.5 to 6.6 Nm, despite its small size. It comes in two different frame sizes and is available with metric and NEMA 23 & 34 mounting faces. The brushless design obviates the need for frequent maintenance or brush replacements, making it suited for the demanding conditions of a factory floor. In addition, the S31HNNA-HSNS-04 motor supports a substantial amount of torque across varying speeds, thereby enhancing the machine's throughput. It incorporates an anti-cog design for smooth, low-speed functioning. Other key features of this motor include Class H insulation that enhances the motor’s longevity and reduces downtime, and an overtemperature thermistor which protects the motor against any potential heat damage. The S31HNNA-HSNS-04 motor also has global approvals and agency recognition, which enable efficient data processing. Moreover, it provides multiple feedback and brake options that improve both safety measures and control methods.

S31HNNA-HSNS-04 by Pacific Scientific is a Brushless Servo Motor in the S Series. The S31HNNA-HSNS-04 features a Frame Size/Stack Length of NEMA 34/1 Stack and a Holding Brake Option of No Brake. This Brushless Servo Motor also has a Hall Sensor for Primary Feedback and a Secondary Feedback of Factory Assigned. Additional specifications include a NEMA Frame for Shaft & Mounting and a Factory Assigned for Terminations.

Revision Part #:

Manufacturer Pacific Scientific
Product Type Servo Motor
Model S31HNNA-HSNS-04
Design Brushless
Torque Range 0.5 to 6.6 Nm
Frame Sizes Two distinct sizes (metric, NEMA 23 & 34 faces)
Additional Features Anti-cog design for smooth low-speed operation
Insulation Class H
Safety Features Overtemperature thermistor for motor protection
Options Multiple feedback and brake options

Distribution Cache Shipping Info and Options

Shipping Carriers: Here at Distribution Cache we ship using UPS, FedEx, DHL, or TNT. In most cases we get very competitive rates based on our volume and will be happy quote shipping cost to your location upon request. We also know that many customers would prefer to ship collect on their own account numbers and welcome this option.

Shipping Blind: We recognize that many of our customers intend to re-sell the product to their end user. We respect our customer’s relationships with their clients and offer blind shipping as an option to ensure that the package arrives in the most clandestine way possible.

Shipping Process: We take pride in the way we package your order and spare no cost in making sure that it arrives safely at your facility. In the case of new parts, we are always sure to package the factory box inside another larger box for safe transit. For reconditioned parts we often use Distribution Cache customized packaging that is specially made to protect the products from the bumps and falls present during shipment.


Shipping Options:

Next Day Air Early AM - This service is the fastest overnight delivery option available. For most locations the package will be guaranteed by 8:30AM.

Next Day Air – This service guarantees delivery by 10:30AM and is the most frequently used option for overnight shipments.

Next Day Air Saver – This cost saving overnight alternative guarantees delivery by 3PM the next day.

2nd Day Air – For domestic shipments that would take 3-5 days if shipped via Ground, sometimes having the order in 2 days is a great way to go

Ground – Ground is the most inexpensive shipping option provided. Please ask if we are doing a “free domestic ground” shipping promotion on your order. We often provide free ground shipping on larger orders.


Emergency Courier – At times we can help work with a courier service to get the part to your facility during downtimes scenarios. We prefer that the customer sets up the courier but we can be there to make sure the product is handed off to the driver. Please give us a call to see if this is an option on your order.

Please Note: Products listed as “ships today” can ship same-day if an order is placed before 4PM. For larger drives and motors we ask that notification for same-day shipments be provided by 2PM at the latest. For any products listed as “ships in 3-5 days”, please give us a call to see if this can be expedited.