Description
• Very fast-acting
• Optional axial leads available
• 1⁄4" x 1 1⁄4" (6.3 x 32mm) physical size
• Ceramic tube, nickel-plated brass endcap construction
• 100pc-carton quantity weighs 1.0 lb (0.45 kg)
• UL Recognized product meets standard 248-14

Electrical Characteristics

Rated Current	% of Amp Rating	Opening Time
1A - 20A	100%	None
	150%	2 minutes maximum
	250%	1 seconds maximum
	400%	-
25A, 30A	100%	None
	150%	2 minutes maximum
	250%	6 seconds maximum
	400%	-

Agency Information
• UL Recognized Card: 1-30A (JFHR2, E56412)
• CSA Component Accepted Card: 1-30A (Class 1422-30 File 53787)

Ordering
• Specify packaging, product, and option code

Dimensions - mm/in

Specifications

Part Number	Voltage Rating		AC Interrupting Rating (amps)*		DC Interrupting Rating (amps)* 125Vdc	Typical DC Cold Resistance (Ω)**	Typical Voltage Drop (V)‡
	Vac	Vdc	250Vac	125Vac
GBB-1-R	250	125	200	10,000	10,000	0.1775	0.2096
GBB-1-1/4-R	250	125	200	10,000	10,000	0.179	0.2497
GBB-2-R	250	125	200	10,000	10,000	0.0662	0.1687
GBB-3-R	250	125	200	10,000	10,000	0.04475	0.1816
GBB-4-R	250	125	200	10,000	10,000	0.03175	0.1778
GBB-5-R	250	125	200	10,000	10,000	0.02125	0.1217
GBB-6-R	250	125	200	10,000	10,000	0.018	0.1324
GBB-7-R	250	125	200	10,000	10,000	0.0155	0.1355
GBB-8-R	250	125	200	10,000	10,000	0.0136	0.1144
GBB-9-R	250	125	200	10,000	10,000	0.0107	0.1218
GBB-10-R	250	125	200	10,000	10,000	0.00934	0.0877
GBB-12-R	250	125	200	10,000	10,000	0.0062	0.0806
GBB-15-R	250	125	200	10,000	10,000	0.00472	0.0735
GBB-20-R	250	125	200	200	200	0.0033	0.0728
GBB-25-R	250	125	200	200	200	0.00252	0.061
GBB-30-R	250	125	200	200	200	0.00206	0.0657

* Interrupting ratings: Interrupting ratings for 1-15A at 125Vdc was measured at 10,000A, 3.5 ms maximum, with time constant. Ratings 20-30A at 125Vdc were measured at 200A, 0.5 ms maximum, with time constant. Ratings 1-15A at 125Vac were measured at 10,000A, and 70% - 80% power factor. The interrupting ratings for 1-30A at 250Vac were measured at 90% - 100% power factor.
** DC Cold Resistance (Measured at <10% of rated current)
† Typical Melting I2t (I2t was measured at listed interrupting rating and rated voltage) Interrupting ratings were measured at 70% to 80% power factor on AC.
‡ Typical Voltage drop (Voltage drop was measured at 25°C±3°C ambient temperature at rated current)

Time-Current Curve


Packaging

Packaging Code	Description
BK	100 fuses packed into a cardboard carton
BK1	1,000 fuses packed into a cardboard carton

Option Code

Option Code	Description
B	Sealed to withstand aqueous cleaning (board washable)
V	Axial leads - copper tinned wire with nickel plated brass overcaps