What is the umot pin for?

I believe this is the VMOT pin. VMOT is the stepper motor supply. The Pololu specs show this voltage can be up to 45V DC.

Are they pre-soldered with the header pins?

The top header isn’t but the bottom rails are as pictured.

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HiLetgo 5pcs DRV8825 Stepper Motor Driver Module for 3D Printer RepRap 4 RAMPS1.4 StepStick

Product ID: 42237235

Details

Brand
HiLetgo
Item Weight
0.21 Kilograms
Manufacturer
HiLetgo
Material
Plastic

⚡45V max supply voltage

🎯Up to 1.5A per phase current without cooling

🔥4-layer 2oz copper PCB for heat dissipation

NZ$46

Duties & taxes included

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Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Step up your 3D printing game with precision and power that won’t quit!

ROBUST POWER HANDLING - Supports up to 45V supply and 1.5A per coil without a heat sink—power your projects with confidence.
PLUG PLAY COMPATIBILITY - Drop-in replacement for A4988 drivers with seamless 3.3V/5V system interface—upgrade without hassle.
OPTIMIZED HEAT DISSIPATION - 4-layer, 2 oz copper PCB design keeps your drivers cool under pressure for longer, reliable runs.
ADVANCED THERMAL PROTECTION - Built-in overcurrent and overtemperature shutdown safeguards your investment from burnout.
PRECISION MICROSTEPPING MASTERY - Achieve ultra-smooth motion with 1/32-step microstepping for flawless 3D prints and robotics.

The HiLetgo DRV8825 Stepper Motor Driver Module is a high-performance, compact driver designed for 3D printers and robotics. It supports up to 45V and 1.5A per phase without cooling, offers six microstepping resolutions down to 1/32-step, and features advanced protections including overcurrent and thermal shutdown. Its 4-layer copper PCB ensures superior heat dissipation, while compatibility with 3.3V and 5V systems makes it a versatile drop-in upgrade for A4988 drivers.

Specifications

ASIN	B01NCE3ZW1
Best Sellers Rank	#55,735 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in 3D Printer Interface & Driver Modules
Brand	HiLetgo
Brand Name	HiLetgo
Customer Reviews	4.2 out of 5 stars 193 Reviews
EU Spare Part Availability Duration	1 years
Item Weight	0.21 kg
Manufacturer	HiLetgo
Material	Plastic
Material Type	Plastic
Model	3-01-1177
Number of Items	5
Part Number	3-01-1177

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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NZ$46

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to New Zealand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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