This page is a summary. The full parameter table — with a stage-by-stage description of the protection chain and the component choices — is on the product page.

Basic Parameters

Parameter	Specification
Model	XT-C-485-HIA-V3/5
Isolated transceiver	TDA51S485HC (isolated supply + isolated signal, SOIC-16W)
Supply voltage	3.0 – 5.5 V (3.3 V / 5 V typical)
Supply current	27.9 mA @ 3.31 V; 22.7 mA @ 5.01 V
Communication mode	RS-485 half-duplex, automatic direction control (no DE/RE signal needed)
Max data rate	500 kbps
Bus load	256 nodes (1/8 unit load)
Operating temperature	−40 ~ +125 °C
Dimensions	90 × 20 mm
Board thickness	1.6 mm

Mounting: SMD or Through-Hole

Every pad carries both features, so one board supports both mounting styles:

Feature	Position	Purpose
Castellated half-hole (stamp hole)	Cut at the board edge	For SMD reflow: the module sits flat on your main board like an ordinary SMD part
Full plated through-hole	Hole centre inside the board	For through-hole: insert a 2.54 mm pin header or a 5.08 mm terminal when you prefer not to reflow

The two mounting styles are electrically equivalent — pick whichever suits your production line.

Interfaces

Side	Pins	Pitch
Logic side	VIN / RX / TX / GND	2.54 mm
Bus side	B / PE / A	5.08 mm

Contributors: Yua

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