Jefferson Electric 636 series control transformers cross to Micron by VA and voltage. The most common one, 636-1131-200 (100 VA, 230 x 460 V to 115 V), crosses to Micron B100BTZ13JK. The -200 suffix means primary fusing provision and -300 means primary and secondary fusing; both cross to the same Micron part. Tell us which fusing you need.
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230x460 to 115 V · 240x480 to 120 V, high inrush · 24 V secondary · 208/277 to 120 V · 400 series (CE)
Jefferson 200/300 series: 230 x 460 V primary, 115 V secondary (standard inrush)
| VA | Jefferson | Micron |
|---|---|---|
| 50 VA | 636-1111-200, 636-1111-300 | B050BTZ13JK |
| 75 VA | 636-1121-200, 636-1121-300 | B075BTZ13JK |
| 100 VA | 636-1131-200, 636-1131-300 | B100BTZ13JK |
| 150 VA | 636-1141-200, 636-1141-300 | B150BTZ13JK |
| 200 VA | 636-1151-200, 636-1151-300 | B200BTZ13JK |
| 250 VA | 636-1161-200, 636-1161-300 | B250BTZ13JK |
| 300 VA | 636-1171-200, 636-1171-300 | B300BTZ13JK |
| 350 VA | 636-1181-200, 636-1181-300 | B350BTZ13JK |
| 500 VA | 636-1191-200, 636-1191-300 | B500BTZ13JK |
| 750 VA | 636-1201-200, 636-1201-300 | B750BTZ13JK |
| 1 kVA | 636-1211-200, 636-1211-300 | EF1K0BTZ13 |
| 1.5 kVA | 636-1221-200, 636-1221-300 | EF1K5BTZ13 |
| 2 kVA | 636-1231-200, 636-1231-300 | EF2K0BTZ13 |
| 3 kVA | 636-1241-200, 636-1241-300 | EF3K0BTZ13 |
| 5 kVA | 636-1261-200, 636-1261-300 | EF5K0BTZ13 |
Micron Group A: 220x440, 230x460 or 240x480 V primary, 110, 115 or 120 V secondary. 1 kVA and up are EconoTRAN, 180°C.
Jefferson 200/300 series: 240 x 480 V primary, 120 V secondary (high inrush)
| VA | Jefferson | Micron |
|---|---|---|
| 25 VA | 636-2401-200, 636-2401-300 | B025BTZ13JK |
| 50 VA | 636-2411-200, 636-2411-300 | B050BTZ13JK |
| 75 VA | 636-2421-200, 636-2421-300 | B075BTZ13JK |
| 100 VA | 636-2431-200, 636-2431-300 | B100BTZ13JK |
| 150 VA | 636-2441-200, 636-2441-300 | B150BTZ13JK |
| 200 VA | 636-2451-200, 636-2451-300 | B200BTZ13JK |
| 250 VA | 636-2461-200, 636-2461-300 | B250BTZ13JK |
| 300 VA | 636-2471-200, 636-2471-300 | B300BTZ13JK |
| 350 VA | 636-2481-200, 636-2481-300 | B350BTZ13JK |
| 500 VA | 636-2491-200, 636-2491-300 | B500BTZ13JK |
| 750 VA | 636-2501-200, 636-2501-300 | B750BTZ13JK |
| 1 kVA | 636-2511-200, 636-2511-300 | EF1K0BTZ13 |
| 1.5 kVA | 636-2521-200, 636-2521-300 | EF1K5BTZ13 |
| 2 kVA | 636-2531-200, 636-2531-300 | EF2K0BTZ13 |
| 3 kVA | 636-2541-200, 636-2541-300 | EF3K0BTZ13 |
| 5 kVA | 636-2561-200, 636-2561-300 | EF5K0BTZ13 |
The sheet crosses the high inrush units to the same Micron Group A parts. If your load has a high inrush, send the inrush VA and we check the size.
Jefferson 200/300 series: 240x480, 230x460, 220x440 V primary, 24/23/22 V secondary
| VA | Jefferson | Micron |
|---|---|---|
| 50 VA | 636-1112-200, 636-1112-300 | B050MBT713XK |
| 75 VA | 636-1122-200, 636-1122-300 | B075MBT713XK |
| 100 VA | 636-1132-200, 636-1132-300 | B100MBT713XK |
| 150 VA | 636-1142-200, 636-1142-300 | B150MBT713XK |
| 250 VA | 636-1162-200, 636-1162-300 | B250MBT713XK |
Micron MBT713XK: 208/230/460 V primary, 24 and 115 V secondary.
Jefferson 200/300 series: 208/277 V primary, 120 V secondary
| VA | Jefferson | Micron |
|---|---|---|
| 50 VA | 636-1116-200, 636-1116-300 | B050MQ15XK |
| 75 VA | 636-1126-200, 636-1126-300 | B075MQ15XK |
| 100 VA | 636-1136-200, 636-1136-300 | B100MQ15XK |
| 150 VA | 636-1146-200, 636-1146-300 | B150MQ15XK |
| 200 VA | 636-1156-200, 636-1156-300 | B200MQ15XK |
| 250 VA | 636-1166-200, 636-1166-300 | B250MQ15XK |
| 500 VA | 636-1196-200, 636-1196-300 | B500MQ15XK |
| 750 VA | 636-1206-200, 636-1206-300 | B750MQ15XK |
| 1 kVA | 636-1216-200, 636-1216-300 | Ask us |
| 1.5 kVA | 636-1226-200, 636-1226-300 | Ask us |
| 2 kVA | 636-1236-200, 636-1236-300 | Ask us |
| 3 kVA | 636-1246-200, 636-1246-300 | Ask us |
| 5 kVA | 636-1266-200, 636-1266-300 | Ask us |
Micron Group F: 208/277 V primary, 120 V secondary. Above 750 VA, ask us about the 277 V primary.
Jefferson 400 series (CE): 230 x 460 V primary, 115 V secondary
| VA | Jefferson | Micron |
|---|---|---|
| 50 VA | 636-1111-400 | B050-0001-GA |
| 75 VA | 636-1121-400 | B075-0002-GA |
| 100 VA | 636-1131-400 | B100-0003-GA |
| 150 VA | 636-1141-400 | B150-0004-GA |
| 200 VA | 636-1151-400 | B200-0005-GA |
| 250 VA | 636-1161-400 | B250-0006-GA |
| 300 VA | 636-1171-400 | B300-0007-GA |
| 350 VA | 636-1181-400 | B350-0008-GA |
| 500 VA | 636-1191-400 | B500-0009-GA |
| 750 VA | 636-1201-400 | B750-0010-GA |
| 1 kVA | 636-1211-400 | E1K0-0008-GA |
| 1.5 kVA | 636-1221-400 | E1K5-0009-GA |
| 2 kVA | 636-1231-400 | E2K0-0010-GA |
| 3 kVA | 636-1241-400 | E3K0-0011-GA |
| 5 kVA | 636-1261-400 | E5K0-0012-GA |
Micron GlobalTRAN Group A, built to IEC 60742 under the CB Scheme. The sheet prints 636-1131-400 and 636-1141-400 again at 2 and 3 kVA; by the series pattern those are 636-1231-400 and 636-1241-400. We confirm on the quote.
Source: Micron Industries control transformer cross reference for Jefferson 200/300 and 400 series, March 2018. Micron units through 750 VA are ImperviTRAN or ValuTRAN, 105°C construction, with 13/32 x 1-1/2 in secondary fuse clips where applicable and a class CC primary fuse block option. Jefferson universal-voltage units (636-1118 series) are not listed; send the number and we cross it. Linked Micron numbers open the part we list at the same VA and voltage. Our listing can carry an added suffix letter (for example B150BTZ13JKF); we confirm the exact suffix on every quote.
How to read a Jefferson 636 number
636 is the Jefferson control transformer line. The middle four digits set the voltage and VA together (1131 is 230 x 460 V to 115 V, 100 VA). The last three digits are the fusing: -200 primary fusing provision, -300 primary and secondary, -400 the CE series. 636-1161-300 is 250 VA, 230 x 460 V to 115 V, and crosses to Micron B250BTZ13JK.
Common questions
What Micron transformer replaces Jefferson 636-1131-200?
Micron B100BTZ13JK, 100 VA, Group A. Primary 220x440, 230x460 or 240x480 V. Secondary 110, 115 or 120 V.
What replaces Jefferson 636-1111-300?
Micron B050BTZ13JK, 50 VA, Group A. Ask for secondary fusing to match the -300.
What replaces Jefferson 636-1211-200 (1 kVA)?
Micron EF1K0BTZ13, a 1 kVA EconoTRAN unit, 180°C construction.
What replaces the Jefferson 400 series?
Micron GlobalTRAN Group A. 636-1131-400 crosses to B100-0003-GA.
Get it crossed and quoted
Send the Jefferson number and the quantity. We send back the Micron part and lead time.
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Related: GE 9T58 cross · HPS PT cross · Siemens MT cross · Square D 9070T cross · Micron control transformers by kVA · All cross references
Jefferson and Jefferson Electric are trademarks of their owner. Applied Control Inc. is not affiliated with them. Names appear only to identify the part being replaced. Check the current Micron datasheet before you specify.