Rev Date: 9/30/2009 61 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
FRN Series
Fusing Resistors
Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
• Coating meets UL 94V-0
• Flameproof – meets overload test of UL #1412
• Designed for constant current to provide overload
protection
• Consistent performance and reliability
• Cut and formed product is available on select sizes, contact
factory for details
• RoHS compliant / lead-free
Ohmic Range and Tolerance
5%
FRN 1/4 0.25W 200V 300V ±350 ppm/ºC 0.22Ω - 10KΩ
FRN 1/2 0.5W 250V 400V ±350 ppm/ºC 0.47Ω - 10KΩ
FRN 1 1W 300V 600V ±350 ppm/ºC 0.47Ω - 10KΩ
FRN 2 2W 300V 600V ±350 ppm/ºC 1Ω - 3KΩ
1 Lesser of √PR or maximum working voltage
Resistance Temperature
Coefficient
Type / Code Power Rating (Watts) @
70ºC
Maximum Working
Voltage1
Maximum Working
Voltage
Electrical Specifications
Type / Code X25 X15 X12 Fusing Time
1Ω - 4.7KΩ
2.4KΩ - 10KΩ
0.47Ω - 2Ω
1.1KΩ - 10KΩ
0.47Ω - 2Ω
1.1KΩ - 10KΩ
1Ω - 3.6Ω
1.1KΩ - 3KΩ
-
2.2Ω - 1KΩ
2.2Ω - 1KΩ
FRN 2 -
30 Sec. Maximum
3.9Ω - 1KΩ
FRN 1/4 5.1Ω - 2.2KΩ
FRN 1/2
FRN 1
0.22Ω - 0.91Ω
-
Fusing Characteristics - Magnification of Power Rating
Nominal
Resistance
4.7
Type Description Code Wattage Tolerance
V
alues SEI Types Pkg Qty Description Code
FRN Fusing Metal Film 1/4 0.25W 5% E24 FRN 1/4 5,000
1/2 0.5W FRN 1/2, 1 2,500
11W FRN 2 1,000
2 2W ALL 1,000 Ammo T
ALL 1000 Bulk A
SEI Type Code Tolerance Packaging
Tape R
FRN 1/2 5% R
How to Order
Rev Date: 9/30/2009 62 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
FRN Series
Fusing Resistors
Stackpole Electronics, Inc.
Resistive Product Solutions
AB CD
Body Length Body Diameter Lead Length (Bulk) Lead Diameter
0.024 ± 0.01 0.09 ± 0.01 1.1 ± 0.08 0.022 ± 0.002 inches
6 ± 0.2 2.3 ± 0.2 28 ± 2 0.55 ± 0.05 mm
0.35 ± 0.02 0.11 ± 0.02 1.1 ± 0.08 0.028 ± 0.002 inches
9 ± 0.5 2.8 ± 0.5 28 ± 2 0.7 ± 0.05 mm
0.43 ± 0.02 0.16 ± 0.02 1.1 ± 0.08 0.028 ± 0.002 inches
11 ± 0.5 4 ± 0.5 28 ± 2 0.7 ± 0.05 mm
0.59 ± 0.04 0.22 ± 0.02 1.38 ± 0.12 0.031 ± 0.002 inches
15 ± 1 5.5 ± 0.5 35 ± 3 0.8 ± 0.05 mm
FRN 2
Units
FRN 1/2
FRN 1
Type / Code
FRN 1/4
Mechanical Specifications
Operating Temperature Range: -40ºC to +155ºC
Load Life @ 70ºC - 1,000hrs ±5%
±2%
Resistance to Soldering Heat ±1%
Short Time Overload
±5%
±1%
Test ResultsTest
Moisture Resistance
Thermal Shock
Performance Characteristics
