Bussmann
®
SMT Chip Fuse
Subminiature Surface Mount Fuses
R
3216FF
R
Dimensional Data
mm (inches)
3.20
±
0.2
(0.126
±
0.008)
1A
Catalog Symbol:
3216FF
Voltage Rating:
32 Volt AC, 63 Volt DC (250mA-3A)
32 Volt AC, 32 Volt DC (4-6.5A)
Interrupting Rating:
50 Amp AC/DC
Physical Size:
EIA SOCM-3216AC (Equivalent to 1206)
3.2
≈
1.6
≈
0.90mm
0.126
≈
0.063
≈
0.035 in.
Agency Approvals:
UL Recognized, Std. 248-14
All Ratings - File E19180, Guide JDYX2
CSA Certified:
1.5-3A - File 53787, Class 1422-01
CSA Component Acceptance
250mA,1A, 4-6.5A - File 53787, Class 1422-30
EIA-RS481 (equivalent to IEC 286, Part 3).
• Fuses are orientated in embossed pockets with ceramic
side facing up to facilitate proper mounting (see “Electrical
Characteristics”, General Note 4.)
0.50
±
0.25
(0.020
±
0.010)
1.60
±
0.2
(0.063
±
0.008)
0.90 + 0.20, -0.15
(0.035 + 0.008, -0.006)
General Information:
• Bussmann SMT Chip Fuses utilize metal film and ultrasonic
wire bond technologies for superior fusing action and
enhanced reliability.
• The fuse element is bonded to a ceramic substrate and
encapsulated with green-colored glass, providing excellent
short-circuit performance and environmental integrity.
• Substrate and coating thermal expansion coefficients are
closely matched to that of FR-4 epoxy-glass circuit board
for superior joint reliability.
• The end terminations are over-plated with nickel and tin-
lead.
Time-Current Characteristics
• Fast acting fuse: Will carry 100% of rated current for a
minimum of 4 hours, and will open within 5 seconds at
250% of rated current (250mA-3A).
• The 4-6.5A fuses will open within 1 second at 350% of
rated current.
Packaging & Ordering Information:
•
Tape and Reel:
Standard 8mm tape, in compliance with
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 636-527-1270 for more information.
3216FF
Product
Symbol
(See Table)
Rated Current
Package Code
TR/
3,000 pcs., on a 178mm reel, 8mm tape width
SP/
50 pcs. on tape in a plastic box
TR1/
15,000 pcs., on a 330mm reel, 8mm tape width
Electrical Characteristics
Part Number
Current
Rating
(Ampere)
Mark
Appearing
On Part
Typical Melting
Integral @ 50A
(A
2
* sec)
Typical Total
Clearing Integral
@ 50A (A
2
* sec)
Typ. Resistance
@
≤10%
Rated
Current (Ohms)
4.50
1.80
1.15
.75
.168
.098
.063
.046
.037
.019
.014
.013
.0085
Typ. Voltage
Drop @ Rated
Current (Volts)
1.4
.73
.66
.63
.20
.18
.16
.14
.13
.11
.10
.09
.076
(XX=Package Code)
AC
DC
AC
DC
XX/3216FF-250mA
.250
.25
.00016
.000084
.00017
.0001
XX/3216FF-375mA
.375
White Dot
.001
.0002
.0010
.0009
XX/3216FF-500mA
.500
0.5
.0014
.0019
.0016
.0026
XX/3216FF-750mA
.750
.75
.0033
.00095
.0033
.0042
XX/3216FF-1A
1
1
.012
.007
.014
.009
XX/3216FF-1.5A
1.5
1.5
.047
.029
.048
.034
XX/3216FF-2A
2
2
.116
.081
.136
.092
XX/3216FF-2.5A
2.5
2.5
.208
.171
.210
.198
XX/3216FF-3A
3
3
.426
.359
.507
.369
XX/3216FF-4A
4
4
.187
.164
.208
.168
XX/3216FF-4.5A
4.5
4.5
.546
.463
.550
.47
XX/3216FF-5A
5
5
.663
.619
.668
.623
XX/3216FF-6.5A
6.5
6.5
2.18
3.21
2.21
3.23
General Notes:
1.
AC interrupting rating, melting integral and total clearing integral measured at 32V, unity power factor.
2.
DC interrupting rating, melting integral and total clearing integral measured at 63V (250mA-3A) and 32V (4-6.5A), with a battery source.
3.
Voltage drop measured at 23 ± 3°C ambient temperature with the device mounted on a suitable circuit board trace.
4.
It is recommended that fuses be mounted with ceramic (white) side facing up.
5.
Device designed to carry rated current for four hours minimum. An operating current of 80% or less of rated current is recommended,
with further derating required at elevated ambient temperatures.
6.
Contact Bussmann if higher ampere ratings are needed.
9-7-99
E99039
Rev. A
Form No. 3216FF
Page 1 of 2
BIF Doc #3001
Bussmann
®
SMT Chip Fuse
Subminiature Surface Mount Fuses
R
3216FF
R
Construction
Time-Current Characteristic Curve
250mA
375mA
500mA
750mA
1A
Construction:
Metal Film Fusible
Element
(250mA - 6.5A)
(Full Size Curves Available)
1.5A
2A
2.5A
3A
CURRENT
RATING
10
1
2
3
4
8
5
6
7
1.
2.
3.
4.
Ceramic Substrate
5. Silver End Termination
Glass Cover (Green)
6. Nickel Barrier (3.88 - 4.3
µm)
Termination Pad
7. 90/10 Tin-lead Plating (7.6 - 12.7
µm)
Metal Film Element
8. Marking
Drawing is not to scale.
1
Recommended Land Pattern - mm (inches)
TIME IN SECONDS
2.50
(0.10)
4A
4.5A
.1
5A
1.80
(0.07)
1.00
(0.04)
.01
NOTE: Trace geometry may affect fuse performance (time-cur-
rent characteristics
≤
300% of rated current and voltage drop at
rated current).
E
D
0
.001
.1
1
10
CURRENT IN AMPERES
40
Form No. 3216FF
Page 2 of 2
BIF Doc #3001
F
A
0
B
0
W
P
1
P
2
P
0
Carrier Dimensions - mm
W
F
E
P
2
P
0
P
1
A
0
B
0
D
0
8.0 + 0.3 / -0.1
3.5 ± 0.05
1.75 ± 0.1
2.0 ± 0.05
4.0 ± 0.1
4.0 ± 0.1
1.73 ± 0.2
3.56 ± 0.2
1.5 + 0.1 / -0.0
Environmental Specifications
Operating Temperature Range:
-55 to +125°C, with proper derating.
T
hermal Shock:
MIL-STD-202, Method 107, Test
Condition B (-65 to 125°C).
Vibration:
MIL-STD-202, Method 204, Test Condition C
(55
to 2000
H
Z
,
10G).
S
olderability:
Withstands 60 seconds above 200°C, 260°C maximum.
Moisture Resistance:
MIL-STD-202, Method 106, 10 day cycle.
Solder Leach Resistance & Terminal Adhesion:
EIA-576.
9-7-99
E99039
Rev. A
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