SPEKTRUM FIRMA™ 3900KV 4-Pole Brushless Motor SPMXSM3300 Instruction Manual

: June 6, 2024
: SPEKTRUM

Table of Contents

System Specifications
Gearing
Connecting the Motor to the ESC
1-Year Limited Warranty
Warranty and Service Contact Information
Compliance Information for the European Union
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SPEKTRUM LOGO2 SPMXSM3300
SPMXSM3300 FIRMA™ 3900KV 4-POLE BRUSHLESS MOTOR
Instruction Manual

NOTICE
All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC. For up-todate product literature, visit horizonhobby.com or towerhobbies.com and click on the support or resources tab for this product.

Meaning of Special Language
The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:
WARNING: Procedures, which if not properly followed, create the probability of property damage, collateral damage, and serious injury OR create a high probability of superficial injury.
CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility of serious injury.
NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or no possibility of injury.

WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating. Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic mechanical ability.
Failure to operate this Product in a safe and responsible manner could result in injury or damage to the product or other property. This product is not intended for use by children without direct adult supervision. Do not attempt disassembly, use incompatible components or augment product in any way without the approval of Horizon Hobby, LLC. This manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.

Age Recommendation: Not for children under 14 years. This is not a toy.
NOTICE: This product is only intended for use with unmanned, hobby-grade, remote-controlled vehicles and aircraft. Horizon Hobby
disclaims all liability outside of the intended purpose and will not provide warranty service related thereto.

System Specifications

SPEKTRUM FIRMA™ 3900KV 4 Pole Brushless Motor

Operation Voltage	12.6V
RPM/Volt (Kv)	3900
Current@7.4V	5.2±1.0A
Maximum Continuous Current	45A
Output	1420W (3S)
Efficiency	80%
Motor Diameter	36mm
Motor Length	60mm
Weight	253g
Shaft Extension Length	19.25±0.5mm
Shaft Diameter	D5mm
Rotor Type	4 Pole
Plug	4mm Bullet
Extension Wire Length	45±5mm

Gearing

Improper gearing will cause excessive heat buildup in the motor and speed control. Use your vehicle’s kit manual in order to find the manufacturer’s recommended pinion size. It is best to monitor the system’s operating temperature when you are operating on new and different tracks or racing surfaces. Your system’s operating temperature should never exceed 160°F (71°C). The best place to monitor the system’s temperature is at the center of the end bell. If the temperature is higher than 160°F (71°C) after a 5-minute run, the gearing should be lowered (change to a smaller pinion gear).
CAUTION: Once the battery is connected to the system, stay clear of the rotating shaft and pinion gear. Failure to do so could result in personal injury.

Installation of the System
Always ensure the mounting screws are long enough to properly seat into the motor. However, ensure the screws do not enter into the the motor too far, which could cause damage.
The maximum depth that the mounting screws can enter into the motor is approximately 3/16 inches (5mm). We suggest using the mounting hardware included with your vehicle. The use of screws that are too long will damage the system and void any warranty.
When installing the motor into your vehicle, it is very important that the gear mesh is correct and smooth with no binding. The vehicle’s
motor mounts usually feature adjustable slotted mounting holes so that you can adjust the gear mesh properly.

Proper gear mesh (how gear teeth meet) is important to the performance of the vehicle.
When the gear mesh is too loose, the spur gear could be damaged by the pinion gear of the motor. If the mesh is too tight, speed could be limited and the system will overheat. Insert a small piece of paper in between the pinion and spur gears as you are installing them. Push the gears together while tightening the screws that mount the system.
When the mesh is at the correct distance, remove the small piece of paper by rotating the spur gear until the paper comes out. Check the mesh at multiple points around the larger spur gear before finalizing the motor mounting position.

Connecting the Motor to the ESC

Connect ESC Terminal A to Motor Terminal A.
Connect ESC Terminal B to Motor Terminal B.
Connect ESC Terminal C to Motor Terminal C.
Follow the ESC manufacturer’s instructions for additional setup and programming. If the motor happens to run in the opposite direction for your vehicle type, reverse any two motor wires.

NOTICE: Always disconnect the battery from the system when you have finished operating your vehicle. The system’s switch only controls power to the receiver and servos. The system will continue to draw current when connected to the battery, resulting in possible damage to the battery through over-discharge.

SPEKTRUM FIRMA™ 3900KV 4 Pole Brushless Motor - Connecting the Motor to the
ESC

1-Year Limited Warranty

What this Warranty Covers
Horizon Hobby, LLC, (Horizon) warrants to the original purchaser that the product purchased (the “Product”) will be free from defects in materials and workmanship for a period of 1 year from the date of purchase.

What is Not Covered
This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or due to improper use, installation, operation or maintenance, (iii) modification of or to any part of the Product, (iv) attempted service by anyone other than a Horizon Hobby authorized service center, (v) Product not purchased from an authorized Horizon dealer, (vi) Product not compliant with applicable technical regulations, or (vii) use that violates any applicable laws, rules, or regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON MAKES NO OTHER WARRANTY OR REPRESENTATION, AND HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.

Purchaser’s Remedy
Horizon’s sole obligation and purchaser’s sole and exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY, OR ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Further, in no event, shall the liability of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use, setup, final assembly, modification, or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the user accepts all resulting liability. If you as the purchaser or user are not prepared to accept the liability associated with the use of the Product, the purchaser is advised to return the Product immediately in new and unused condition to the place of purchase.

Law
These terms are governed by Illinois law (without regard to conflict of law principles). This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Horizon reserves the right to change or modify this warranty at any time
without notice.

WARRANTY SERVICES
Questions, Assistance, and Services
Your local hobby store and/or place of purchase cannot provide warranty support or service. Once assembly, setup or use of the Product has been started, you must contact your local distributor or Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance. For questions or assistance, please visit our website at www.horizonhobby.com, submit a Product Support Inquiry, or call the toll free telephone number referenced in the Warranty and Service Contact Information section to speak with a Product Support representative.

Inspection or Services
If this Product needs to be inspected or serviced and is compliant in the country you live and use the Product in, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA)
number. Pack the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection.
Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until
it arrives and is accepted at our facility. An Online Service Request is available at http://www.horizonhobby.com/content/servicecenter_render- service-center. If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service.
When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you cane reached during business hours.
When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem.
A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.

NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office.

Warranty Requirements
For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. Service or replacement decisions are at the sole discretion of Horizon.

Non-Warranty Service
Should your service not be covered by warranty, service will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for service you are agreeing to payment of the service without notification. Service estimates are available upon request. You must include this request with your item submitted for service. Non-warranty service estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Horizon accepts money orders and cashier’s checks, as well as Visa, MasterCard, American Express, and Discover cards. By submitting any item to Horizon for service, you are agreeing to Horizon’s Terms and Conditions found on our website http://www.horizonhobby.com/content /service-center_renderservice-center.

ATTENTION: Horizon service is limited to Product compliant in the country of use and ownership. If received, a noncompliant Product will not be serviced.
Further, the sender will be responsible for arranging return shipment of the unserviced Product, through a carrier of the sender’s choice and at the sender’s expense. Horizon will hold non-compliant Product for a period of 60 days from notification, after which it will be discarded.

Warranty and Service Contact Information

Country of Purchase| Horizon Hobby| Contact Information| Address
---|---|---|---
United States of America| Horizon Service Center
(Repairs and Repair Requests)| servicecenter.horizonhobby.com/RequestForm/| 2904 Research Rd.
Champaign, Illinois
61822
USA
Horizon Product Support
(Product Technical Assistance)| productsupport@horizonhobby.com
877-504-0233
Sales| websales@horizonhobby.com
800-338-4639

Compliance Information for the European Union

EU Compliance Statement:
SPM FIRMA 3900Kv 4-pole BL Motor (SPMXSM3300) Hereby, Horizon Hobby, LLC declares that the device is in compliance with the following: EU EMC Directive 2014/30/EU; RoHS 2 Directive 2011/65/EU; RoHS 3 Directive – Amending 2011/65/EU
Annex II 2015/863.
The full text of the EU declaration of conformity is available at the following internet address: https://www.horizonhobby.com/content /supportrender-compliance.

EU Manufacturer of Record:
Horizon Hobby, LLC
2904 Research Road
Champaign, IL 61822 USA
EU Importer of Record:
Horizon Hobby, GmbH
Hanskampring 9
22885 Barsbüttel Germany

WEEE NOTICE:
This appliance is labeled in accordance with European Directive 2012/19/EU concerning waste of electrical and electronic equipment (WEEE). This label indicates that this product should not be disposed of with household waste. It should be deposited at an appropriate facility to enable recovery and recycling.

Created 02/2021 | 190501