®
Bussmann
Panel Mount Fuseholders
For ⁄Ω¢∑ ≈ 1⁄Ω¢∑ and 5mm ≈ 20mm Fuses
HTB
Series
Knob and Screwdriver
Slot Carriers
⁄Ω¢∑ ≈ 1⁄Ω¢∑ and 5mm ≈ 20mm
Fuse Carriers
High and Low
Profile
FTI
20
30
FTM
(a)
(b)
STI
(a) Knob-type carrier interchangeable
with all HTB-20, 40, 60 and 80
series holders.
(b) Screwdriver slot-type carrier inter-
changeable with all HTB-30, 50 and
90 series holders.
STM
⁄Ω¢∑ ≈ 1⁄Ω¢∑
5mm x 20mm
40
50
• All holder bodies have the option of
using either ⁄Ω¢∑ ≈ 1⁄Ω¢∑ or
5mm ≈ 20mm carriers.
• This feature allows the OEM the
flexibility of shipping equipment to
international destinations simply by
changing the fuse carriers.
• The HTB-20 and 30 series are low
profile versions minimizing front panel
exposure.
• The HTB-40 and 50 series are high
profile versions conserving critical,
behind-panel space.
Catalog Symbol: HTB
Agency Approvals:
U.L. Recognized, 20A (‹Ω¡§∑ quick-connect 15A) @ 250V
Guide IZLT2, File E14853
CSA, 16A @ 250V; Screwdriver slot carrier only,
Class 6225-01, File E47235; VDE, 10 A @ 250V (49890);
SEMKO 10A @ 250V (8945092, 9005230).
Electrical Data: Insulation resistance (per IEC 257),
10,000 ohms @ 500 Vdc; contact resistance (per IEC 257),
0.005 ohms max. @ 1A; standoff voltage (per IEC 257),
480V/Mil @ .125 in. thickness.
Molded Components: High temperature, flame retardant,
thermoplastic; U.L. Component Recognized; 94 VO; mount-
ing nut, spacer-black polycarbonate.
Mounting: Withstands 15 to 20 lbs-ins torque to mounting
nut when mounting fuseholder to panel. Maximum panel
thickness 0.300 inches.
Degree of Protection:
• IEC 529 provides a classification system for the degree of
protection of equipment enclosures and associated panel
components, with respect to ingress of solid objects and
water.
Temperature Rating (RTI): 130°C
Environmental: Maximum operating temperature
–55°C to 85°C.
• Finger grip (knob type) and screwdriver slot versions have
a rating of IP-40.
• Finger grip versions with the splash proof (SP) option have
a rating of IP-67.
Terminals: Tin-plated brass.
Form No. HTB Series
Page 1 of 3
9-7-99
SB99034
Rev. A
BIF Doc #2119