Datasheet

Axial Lead & Cartridge Fuses
6x25mm > 70VDC Fuse > 688 Series
688 Series Lead-Free, 6x25mm Fuse
RoHS
Pb
Description
A 70Vdc rated ceramic fuse with remarkable interrupting
rating in a compact 6x25mm package, which is well suited
for circuit protection in telecom applications.
Features
• In accordance with Underwriter’s Laboratories
Standard UL 248-14
• Available in cartridge version
• RoHS compliant and Lead-free
Agency Approvals
Agency
Applications
Agency File Number
Ampere Range
T 50257715 01
30A
E10480
5A - 40A
• PDU in Telecom Datacenter
• Wireless Transmission Base Station
Additional Information
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Ampere Rating
5A - 40A
Opening Time
Datasheet
Samples
Resources
4 Hours, Min.
120 Second, Max.
Electrical Characteristic Specifications by Item
Nominal Cold
Resistance
(mOhms)
Nominal
Melting I2t
Under 10In (A2
sec)
Agency Approvals
Amp Code
Amp Rating
Voltage Rating
Interrupting
Rating
005.
5
70Vdc
2500A @ 70Vdc
22
118
x
006.
6
70Vdc
2500A @ 70Vdc
21
132
x
010.
10
70Vdc
2500A @ 70Vdc
10
570
x
015.
15
70Vdc
2500A @ 70Vdc
6
554
x
030.*
30
70Vdc
2500A @ 70Vdc
2.1
4200
040.*
40
70Vdc
250Vac
2500A @ 70Vdc
1500A @ 250Vac
1.55
7800
x
x
x
Note: *Surge rating: 1.2/50-8/20μs, 20KV/10KA surge is available for 30A and 40A.
© 2015 Littelfuse, Inc.
Application testing is strongly recommended. Specifications are subject to change without notice.
Revised: 07/14/15
Axial Lead & Cartridge Fuses
6x25mm > 70VDC Fuse > 688 Series
30A
40A
10000
15A
10A
Average Time Current Curves
5A
6A
Temperature Re-rating Curve
1000
TIME IN SECONDS
100
10
1
0.1
0.01
1
10
CURRENT IN AMPERES
100
1000
Note:
Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
Wave Parameter
260
240
Preheat:
220
(Depends on Flux Activation Temperature)
200
180
160
140
120
100
80
60
40
Lead-Free Recommendation
(Typical Industry Recommendation)
Temperature Minimum:
100°C
Temperature Maximum:
Preheat Time:
150°C
60-180 seconds
Solder Pot Temperature:
260°C Maximum
Solder Dwell Time:
2-5 seconds
Recommended Hand-Solder Parameters:
Time (Seconds)
Cooling Time
Preheat Time
Dwell Time
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/14/15
240
230
220
210
200
190
180
170
160
150
140
130
120
110
90
100
80
70
60
50
40
30
0
0
20
20
10
Temperature (°C) - Measured on bottom side of board
300
Solder Iron Temperature: 350°C +/- 5°C
Heating Time: 5 seconds max.
Note: These devices are not recommended for IR or
Convection Reflow process.
Axial Lead & Cartridge Fuses
6x25mm > 70VDC Fuse > 688 Series
Product Characteristics
Materials
Terminal Strength
Solderability
Product Marking
Packaging
Body : Ceramic
Cap : Tin–plated Copper
Leads: Tin-plated Copper
MIL-STD-202, Method 211,
Test Condition A
Operating
Temperature:
–55ºC to 125ºC.
Thermal
Shock:
MIL-STD-202, Method 107, Test Condition B
MIL-STD-202 Method 208
Vibration
MIL-STD-202, Method 201
Brand logo, current and voltage ratings,
agency approval marks
Available in Bulk and Ammo packaging
(M=1000 pcs/pkg)
Humidity
MIL-STD-202, Method 103, Test Condition A:
High RH (95%) and elevated temp (40ºC) for
240 hours
Salt Spray
MIL-STD-202, Method 101, Test Condition B
Dimensions
Part Numbering System
Measurements displayed in millimeters
0688 xxxx M X P
Series
Amp Code
25.2㼼0.3
Refer to Amp Code column of
Electrical Characteristics Table
6.3+0.15/-0.05
Quantity Code
M = 1000
Packaging Code
5.5㼼0.2
X = Filler
Lead-free
Packaging
Packaging Specification
Quantity
Quantity & Packaging
Code
Taping Width
Ammo
N/A
1000
MAT4P
N/A
Bulk
N/A
1000
MX
N/A
Packaging Option
688 Series
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/14/15