Micron 3.0 kVA control transformers, 5 catalog numbers in the common voltage groups. Every catalog number below is single phase, 50/60 Hz, epoxy encapsulated and UL/cUL Listed. Click a part number for full specs, or send us a competitor part number and we will cross it.
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Micron 3.0 kVA control transformers
| Catalog number | Primary | Secondary | Secondary full load amps | Terminals | Temp class | Secondary fuse clip | Size A x B x C (in) | Weight (lb) |
|---|---|---|---|---|---|---|---|---|
| B3K0BTZ13JXH | 220x440 / 230x460 / 240x480 V | 110 / 115 / 120 V | 26.09 A | 6 | 180 C | No (above 2 kVA) | 8.00 x 9.00 x 7.50 | 68.8 |
| B3K0MBT13XXH | 208 / 230 / 460 V | 115 V | 26.09 A | 6 | 180 C | No (above 2 kVA) | 8.50 x 9.00 x 7.50 | 77.1 |
| B3K0-0503-3H | 240x480 V | 120x240 V | 26.09 A at 120 V, 13.04 A at 240 V | 6 | 180 C | No | 8.00 x 9.00 x 7.62 | 80.0 |
| B3K0BTWZ37XXH | 230 / 460 / 575 V | 95 / 115 V | 31.58 A at 95 V, 26.09 A at 115 V | 6 | 180 C | No (above 2 kVA) | 8.69 x 9.00 x 7.50 | 83.6 |
| B3K0-0324-3H | 240 / 347 / 380 V | 120x240 V | 25.00 A at 120 V, 12.50 A at 240 V | 6 | 180 C | No | 8.50 x 9.00 x 7.62 | 80.0 |
A = width, B = height, C = depth, in inches, from the Micron ImperviTRAN catalog CCT-16A dimensional tables. Terminal cover kit TPTC-2002 fits 6-terminal designs, TPTC-2001 fits 4-terminal designs. Terminal torque is 20 lb-in up to 30 A and 30 lb-in above 30 A. Two-letter suffix is 105 C, three letters ending in F is 130 C, ending in H is 180 C. Add an R in the suffix (or -8 on serialized numbers) for a factory installed Class CC primary fuse block.
Do not see your primary and secondary combination? Micron builds more 3.0 kVA voltage groups than are listed here. Send the voltages and we will pull the catalog number.
Which part number to pick
- B3K0BTZ13JXH when the panel is fed from 230 or 460 V three-phase and you want 115 V control. The BTZ primary is triple rated, so the same part covers 220, 230 and 240 V (or 440, 460 and 480 V) within 5 percent.
- B3K0MBT13XXH when the feed can be 208, 230 or 460 V and the panel ships to different sites.
- B3K0-0503-3H for a 240x480 V primary and a 120x240 V secondary. Wire the secondary series for 240 V or parallel for 120 V.
- B3K0BTWZ37XXH for 575 V Canadian feeds. Secondary taps at 95 and 115 V.
- B3K0-0324-3H for 240, 347 or 380 V primaries with a 120x240 V secondary.
Sizing a 3.0 kVA control transformer
Control transformers are sized twice. First for steady load, then for inrush.
- Add the sealed VA of every coil, relay, timer and pilot light on the secondary. That is the continuous load.
- Find the largest contactor or starter on the panel and take its inrush VA.
- Add that inrush to the sealed VA of everything already pulled in. The transformer has to hold secondary voltage up during that moment or the coil will not pick up.
3.0 kVA gives you 3000 VA continuous. Long secondary runs and low line voltage both eat into what is left, so check the inrush number before you settle on a size.
Why Micron
- Epoxy encapsulated windings, built for moisture, coolant mist and plant dust.
- UL and cUL Listed, file E46323.
- 20 year manufacturer warranty.
- Made in the USA.
Cross reference from Acme, Hammond, Sola and others
We cross 3.0 kVA control transformers from Acme, Hammond Power Solutions, Sola, Jefferson, Eaton, Square D, Schneider Electric, Siemens and Allen-Bradley. Send the part number with the primary and secondary voltage and the quote comes back with the Micron catalog number beside it. See the Micron control transformer line page or the full Micron collection.
Other sizes
All sizes, and what to do for 2.5, 7.5 and 10 kVA 1.0 kVA 1.5 kVA 2.0 kVA 5.0 kVA
Common questions
What is a 3.0 kVA control transformer used for?
A 3.0 kVA control transformer steps panel line voltage down to a control voltage, most often 115V or 120V, so contactor coils, relays, timers and pilot devices run at a safe level. 3.0 kVA is 3000 VA of continuous capacity.
How do I know if 3.0 kVA is the right size?
Add the sealed VA of every coil and device on the secondary. Then check the inrush VA of the largest contactor pulling in while the rest are already sealed. The transformer has to hold secondary voltage high enough during that inrush for the coil to pick up. Send us the device list and we will size it.
What replaces an Acme, Hammond Power Solutions or Sola 3.0 kVA control transformer?
Micron builds 3.0 kVA catalog numbers that match the common primary and secondary combinations. Send the competitor part number and we will come back with the Micron equivalent and a price.
How fast can I get a price?
Send the part number through the quote form. Quotes go out the same business day, 8 to 5 Eastern, Monday through Friday.
Get a price
Send the catalog number and the quantity. If the panel is still on paper, take 15 minutes and we will size it with you.
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Email: chris@appliedcontrolinc.com
Phone: 248-830-4850
Acme®, Sola®, Square D®, Schneider Electric®, Siemens®, Eaton®, Jefferson®, Allen-Bradley® and Hammond Power Solutions® are registered trademarks of their respective owners. Applied Control Inc. is not affiliated with, endorsed by, or sponsored by any of these companies. Competitor part numbers appear here solely to identify products for comparison. Verify current specifications against the manufacturer’s own datasheet before purchase or installation.