WESTCONW3330-03SDigital Panel Meter, 115 VAC 50/60 Hz, 7 W, Panel-Mount LED Readout — Obsolete Legacy Instrument, No Published Datasheet

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. Two units are in stock.

What is published and what is not

We would rather tell you this up front than pad the page with numbers borrowed from a different model. There is no manufacturer datasheet for the W3330 or for the wider W33xx series in public circulation — not on the successor manufacturer’s site, not in the usual distributor archives, not in scanned catalogue collections. So here is the honest split.

Confirmed from the unit and its nameplate

Type: digital panel meter, panel-mountSupply: 115 VAC, 50/60 HzPower consumption: 7 WModel: W3330-03S (also written W333003S)Manufacturer: Westcon Inc., USAQuantity available: 2, same batch
Not published anywhere, and therefore not stated here as fact:

What the meter measures. The W3330 could be a counter, a timer, a rate meter or a process indicator. We are not going to guess between those, because the wrong guess would send you the wrong instrument.Display digit count.Accepted input signal types and ranges.Output, alarm and relay options.Panel cutout dimensions and DIN size. A 1/8 DIN cutout would be entirely plausible for an instrument of this vintage, but plausible is not verified — treat the bezel in the photographs as the reference, or ask us to measure it.

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; give it the ventilation clearance the panel design assumed.

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 almost certainly a range or option designation rather than a cosmetic variant. But no public decoder table for the W33xx suffixes exists, so we cannot tell you which range or which option. If the exact configuration matters to your application, the manufacturer of record can likely resolve it from the model and serial — see below.

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 by 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. That is reasonable evidence the W33xx models share one power-supply design and are variants within a single family rather than unrelated products. To be clear about the standard of proof: that is an inference from the sibling nameplate, not a statement from a datasheet.

How to verify fit before you buy

The photographs on this listing are the datasheet for this item, so use them that way. They show the housing, the bezel and the rear of the case including the terminal block, which is where the wiring arrangement and any option markings will be legible. If you need a dimension we have not published — bezel height and width, panel cutout, case depth behind the panel, terminal designations — ask and we will measure the actual unit and send you the numbers. We would rather answer a measurement question than have you fit a meter that does not seat.

Quantity and configuration

Two units are in stock from the same batch. That is worth noting if you are replacing a pair of meters on one panel or one console: matched units from a single batch will have the same bezel finish and the same display appearance, which a single replacement alongside an aged original will not. If you only need one, one is available.

Lifecycle and the current-production alternative

The W3330 is obsolete and discontinued; it is not in current production and no factory stock exists. 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 explicitly not a form-fit-function replacement for 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.