WestconW3330-03SDigital Panel Meter, Panel-Mount LED Readout, 115 VAC 50/60 Hz, 7 W Line-Powered

Product Description

What this part is

This is a Westcon W3330-03S digital panel meter, rated 115 VAC, 50/60 Hz, 7 W. It is a panel-mount instrument with a digital readout, from the era when Westcon built digital panel meters, AC tachometer generators and process instruments for US industrial panels.

What the 115 VAC / 50/60 Hz / 7 W rating actually tells you:
More than it looks like. A 115 VAC supply means this is a line-powered instrument rather than a low-voltage loop- or 24 VDC-powered one, so it wants a control-power feed and not an instrument bus. The 50/60 Hz tolerance means it is not frequency-fussy and will run on either standard. And 7 W is a meaningful number when you are adding an instrument to a panel that is already loaded — it is roughly 60 mA at 115 V, which is comfortably inside almost any existing control transformer, but it is also high enough to suggest an LED display and a linear supply rather than a modern switching design. That in turn means it will be tolerant of a dirty supply and will run warm; the panel design assumed ventilation clearance around the case.

Decoding the order code

The base model is W3330 and the suffix is -03S. Westcon and its sister DigiTec instrument line used suffix codes to specify range, input type and option content — the pattern is visible in surviving DigiTec order codes such as 2551A-BR34-XXXX-SX, where each block after the base model selects a characteristic. On that basis, -03S is a range or option designation rather than a cosmetic variant.

Confirmed from the unit and its nameplate

Type: digital panel meter, panel-mount.

Supply: 115 VAC, 50/60 Hz.

Power consumption: 7 W.

Model: W3330-03S (also written W333003S).

Manufacturer: Westcon Inc., USA.

Who supports Westcon instruments now

This is the single most useful thing to know about a Westcon nameplate, because the company name on the front of the meter no longer exists as an independent business. Westcon Inc. is now a division and brand of Marsh Bellofram Corporation of Newell, West Virginia, where it sits alongside Marsh Bellofram’s DigiTec instrument division. The ownership chain is corroborated on the distributor side as well: both Radwell and Locate Controls catalogue Westcon part numbers under the Marsh Bellofram brand. So if you need the suffix decoded, a wiring diagram, or a calibration reference, Marsh Bellofram is the company that holds the legacy Westcon documentation and is the right phone call — not a generic panel-meter vendor.

Related legacy model families

For anyone matching a mixed panel or hunting a family document, the Westcon model families that turn up in the surplus and repair market are the 2410, 2431A, 2432A, 2435, 2491 and 2551 (the Intelligent DPM), plus the W33xx series to which this meter belongs — W3320N and W3330 are the two W33xx models we have seen. The W3320N carries an identical 115 VAC / 50/60 Hz / 7 W nameplate rating, which is reasonable evidence the W33xx models share one power-supply design and are variants within a single family rather than unrelated products. That is an inference from the sibling nameplate.

Quantity and configuration

Meter only, sold individually, one unit per purchase. The photographs on this listing show the housing, the bezel and the rear of the case including the terminal block, where the wiring arrangement and any option markings are legible, and they are the reference for the hardware fitted to the unit as supplied.

Lifecycle and the current-production alternative

The W3330 is obsolete and discontinued. If you are specifying new rather than maintaining existing, the current-production line from the same corporate family is the Marsh Bellofram DigiTec universal-input digital panel meter series — the D3200, D3600 and D3700A. Those are a functional successor family covering the same job with modern universal inputs, and they are a different form factor from a W3330: expect different cutout, different wiring and different configuration. For an existing panel where the cutout and wiring are fixed, an original W3330 is the low-disruption answer, which is the usual reason people go looking for one.