Eaton · Bussmann Series
Branch-circuit, supplementary, PV and high-speed protection — one page covering the full Bussmann series range, from 0.1 A control circuits to 6 000 A service entrances.
| Type / Class | Image | Voltage Rating | Current Range | Breaking Capacity | Typical Applications |
|---|---|---|---|---|---|
|
Class CC
UL 248-4 · Rejection-type, current-limiting
|
|
600 V AC
300 V DC
|
0.1 – 60 A
|
200 kA
Very high · AC
|
Control transformers, small motors, lighting branch circuits, panelboard feeders. |
|
Class CF (CUBEFuse)
UL Class CF · Finger-safe, UL 98 disconnect rated
|
|
600 V AC
300 V DC
|
1 – 400 A
|
300 kA
≤ 100 A · 200 kA above
|
IP20 finger-safe panels, compact OEM enclosures, motor disconnects. |
|
Class J
UL 248-8 · Time-delay & fast-acting
|
|
600 V AC
300 V DC
|
1 – 600 A
|
200 – 300 kA
Very high · current-limiting
|
Motor branch circuits, VFD input, transformer primary, general distribution. |
|
Class L
UL 248-10 · Main & feeder protection
|
|
600 V AC
300 V DC
|
601 – 6 000 A
|
300 kA
Very high · AC
|
Service entrance, main switchboards, large feeders, high-rise risers. |
|
Class RK1
UL 248-12 · Dual-element, time-delay
|
|
250 / 600 V AC
125 – 300 V DC
|
0.1 – 600 A
|
200 – 300 kA
Very high · current-limiting
|
Motor circuits, combination starters, retrofit into Class H / RK5 holders. |
|
Class RK5
UL 248-12 · Dual-element, time-delay
|
|
250 / 600 V AC
125 – 300 V DC
|
0.1 – 600 A
|
200 kA
High · AC
|
Cost-sensitive motor & transformer protection, legacy panel upgrades. |
|
Class T
UL 248-15 · Fast-acting, compact body
|
|
300 / 600 V AC
JJN 160 V DC · JJS none
|
1 – 1 200 A
|
200 kA
High · AC
|
Space-limited panels, lighting, disconnects, busway taps. |
|
Class H / K
UL 248-6 / -9 · One-time & renewable
|
|
250 / 600 V AC
Non-current-limiting
|
1 – 600 A
|
10 – 50 kA
Low · H 10 kA / K 50 kA
|
Legacy equipment replacement, general-purpose non-current-limiting duty. |
|
NH (DIN) / BESS
IEC 60269 · gG / gPV / aR blade links
NH1 · NH2 · NH3BESS links
|
|
690 V AC
1 000 V DC
|
40 – 1 250 A
|
120 kA
Very high · IEC
|
Battery energy storage clusters, LV distribution, industrial main boards. |
|
High-Speed Semiconductor
IEC 60269-4 · aR / gR, UL recognized
|
|
250 – 1 500 V
AC / DC, series dependent
|
10 – 2 000 A
|
200 kA
Very high · extremely low I²t
|
VFDs, UPS, rectifiers, traction converters, electrolyzers. |
|
Solar PV (gPV)
UL 2579 / IEC 60269-6 · 1 000 – 1 500 V DC
|
|
1 000 – 1 500 V DC
gPV characteristic
|
1 – 600 A
|
50 kA
DC rated · per UL 2579
|
String protection, combiner boxes, inverter input, array isolation. |
|
EV / Battery Pack
Automotive & DC fast-charge · aR / EV fuse
|
|
500 – 1 000 V DC
Traction & charger circuits
|
50 – 500 A
|
20 – 50 kA
DC rated · high cyclic life
|
Traction battery packs, BDU / PDU, on-board chargers, DC charging piles. |
Notes|Breaking capacity = interrupting rating (IR) at rated voltage; AC and DC ratings differ and are shown separately where applicable.
|Voltage and current ranges are the envelope across the listed series — individual catalogue numbers may cover a narrower band.
|All figures are UL / CSA (or IEC where noted) maximum ratings; always confirm against the dedicated series datasheet before specifying.
