More from Buddy RC →KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in
$90
In stock at buddyrc.com
The KST A20-3813 V8 is a brushless digital servo with an aluminum alloy case and bronze and hardened steel gears, rated 30 to 43 kg-cm from 6.0 to 8.4V. Speed runs 0.15 to 0.12 sec/60 degrees and it weighs 72g. It suits large planes, helis, UAVs and robotics that need high torque in a standard-size servo.
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Highlights
- 30 / 38 / 43 kg-cm at 6.0 / 7.4 / 8.4V
- 0.15 / 0.13 / 0.12 sec/60 degrees
- Brushless motor, aluminum alloy case
- Phosphor bronze and hardened steel gears
- Shielded 22AWG lead, plus or minus 50 degree travel
Best for
Builders of large models or UAVs needing high torque at a mid price.
Things to consider
- Travel is plus or minus 50 degrees at 1000-2000us; check that suits your linkage.
- Operating range is -10 to 55 C.
- Much of the listing is generic KST OEM copy rather than this servo.
Key specs
| Price | $90 |
|---|---|
| Torque | 43 kg-cm @ 8.4V |
| Speed | 0.12 s/60 deg @ 8.4V |
| Voltage | 6.0-8.4V |
| Gears | Phosphor bronze + hardened steel |
| Size | 40.5 x 20 x 38 mm |
| Weight | 72 g |
Our take
Lots of torque per dollar for big models.
KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in at a glance
| Brand | Buddy RC |
|---|---|
| Price | $90 |
| Type | Servo |
| Availability | In stock at buddyrc.com |
| Returns | Items can be returned within 30 days of receipt with an RMA code requested by email.… |
Price check
At $90, the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in is toward the top of Buddy RC's price range, whose 4,520 listed products run $1 to $9,999.
Similar items from other brands we track run $30.99 to $88.
Frequently asked questions
How strong is the A20-3813?
Up to 43 kg-cm (about 597 oz-in) at 8.4V.
Is it brushless?
Yes, it uses a brushless motor in an aluminum alloy case.
How much is the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in?
Buddy RC lists it at $90 on buddyrc.com. We refresh prices throughout the day, but always confirm the final price at checkout.
Is there a discount on the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in?
Buddy RC publishes these ways to save: Loyalty points with an account. Buddy RC sets the terms, which can change; our Buddy RC coupons page has the details.
What is Buddy RC's return policy?
Items can be returned within 30 days of receipt with an RMA code requested by email. Returns in new condition with original packaging have no restock fee; others are charged 10 to 20%, and shipping fees are not refunded.
How long does Buddy RC take to ship?
Orders placed before 2 p.m. EST usually ship the same business day from Columbus, Ohio, by USPS or UPS, with most packages arriving in 2 to 5 business days. Orders over $100 may ship free within the US, excluding most airplanes, and LiPo batteries ship only by UPS Ground.
Does the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in come with a warranty?
Buddy RC's published warranty terms: Products older than 30 days may be exchanged under warranty but aren't eligible for a refund. Specific warranty terms aren't published in the policy text.
Where can I buy the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in?
The KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in is sold directly by Buddy RC on buddyrc.com. The Shop now button on this page goes straight to the product there.
Is the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in in stock?
Yes. Buddy RC lists it as in stock on buddyrc.com as of our latest check. Stock and prices refresh throughout the day.
Is Buddy RC a legit store?
Buddy RC is a strong pick for RC pilots who need specific parts, power systems or helicopter spares from a US warehouse with same-day dispatch. Skip it if you want generous returns, since shipping is never refunded and returns that aren't in new condition carry a 10 to 20% restock fee. Confirm the exact part number and motor or frame compatibility before ordering, because most of the catalog is model-specific. Our full Buddy RC review covers shipping, returns and what to check before ordering.
Is the KST A20-3813 V8 Digital Servo 8.4V 0.12s 43kg.cm 597oz.in expensive?
At $90 it is toward the top of Buddy RC's range ($1 to $9,999 across 4,520 products), and similar items from other brands run $30.99 to $88.
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