Nichrome Resistor Networks
on Silicon Substrates
SFN08A, SFN08B Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
01. 12
Isolated and bussed circuits
Thin film resistor network
RoHS compliant
Precision Nichrome Resistors on Silicon Passivation coating provides protection in humid environments
Industry Standard Packaging 8 pad SON1 4mm square with 0.8 mm pitch (JEDEC MO-229D)
Ratio Tolerances < ± 0.05%
TCR Tracking Tolerances < ± 5 ppm/°C
Standard Resistance Range31K ohms to 100K ohms (Isolated)
1K ohms to 30K ohms (Bussed)
Resistor Tolerances ± 0.25%
Ratio Tolerances ± 0.05%
TCR Reference TCR table
Operating Temperature Range -55°C to +125°C
Interlead Capacitance < 2 pF
Insulation Resistance ≥ 10,000 Megohms
Maximum Operating Voltage 100 Vdc or PR
Noise, Maximum (Mil-STD-202, Method 308) -25 dB
Resistor Power Rating at 70°C 0.1 Watts
Electrical2
Features
Schematics
1 Small outline no lead (SON) package is also referred to as quad flat no lead (QFN) or dual flat no lead (DFN) packages.
2 Specifications subject to change without notice.
3 E96 codes available.
Model Package Power @ 70°C(watts)4
SFN08 0.4
Nichrome Resistor Networks
on Silicon Substrates
SFN08A, SFN08B Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
01. 12
Package Power And Derating Curve
Thermal Shock plus Power Conditioning ΔR 0.25%
Short Time Overload ΔR 0.1%
Terminal Strength ΔR 0.1%
Moisture Resistance ΔR 0.2%
Mechanical Shock ΔR 0.25%
Vibration ΔR 0.25%
Low Temperature Operation ΔR 0.05%
High Temperature Exposure ΔR 0.1%
Resistance to Solder Heat ΔR 0.1%
Marking Permanency Per MIL-STD-202, Method 215
Flammability UL-94V-0 Rated
Storage Temperature Range -55°C to +125°C
Environmental (MIL-R-83401)
Pad Plating 100 matte Tin (RoHS compliant)
Pad Material Copper Alloy
Pad Coplanarity 0.003” (0.08 mm)
Substrate Material Silicon
Resistor Material Passivated Nichrome
Body Material Molded Epoxy
Mechanical
4 Maximum power per resistor @ 70C is 100 mW, not to exceed package power
Nichrome Resistor Networks
on Silicon Substrates
SFN08A, SFN08B Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
01. 12
Ordering Information5
S FN 08 A XXXX F S LF 13
Model Series:
S = Passivated Nichrome
on Silicon
Package Type:
Pad Count:
Circuit Type:
A=Isolated
B=Bussed
Resistance code:
Bulk packaging option:
7=7” Tape & Reel
13 = 13” Tape & Reel
Lead Finish:
LF=Lead Free (RoHS)
TCR Code:
Tolerance Code:
Package Codes Package Size Pad count Mechanical Outline
SON FN 4mm x 4mm 8 MO-229D
Accuracy Code at 25°C CA CB D FA F G J
Absolute Resistance Tolerances (%) ± 0.25 ± 0.25 ± 0.5 ± 1.0 ± 1.0 ± 2.0 ± 5.0
Ratio Tolerances (R1 Ref) (%) ± 0.05 ± 0.1 ± 0.1 ± 0.05 ± 1.0 N/A N/A
TCR Code (-55°C to 125°C) Q P S L
Absolute (ppm/°C) ± 25 ± 50 ± 100 ± 200
Tracking (R1 Ref) (ppm/°C) ± 5 ± 5 N/A N/A
Quantity
Model + Pad Count 7” Reel 13” Reel
SFN08 1000 3000
First 3 digits are significant. Fourth digit denotes number of trailing zeros. For values less than 100, use “R” to denote a
decimal point. Example, 51 and 10000 ohms are coded as 51R0 and 1002 respectively. Standard values follow E96.
Package Type
Resistance Tolereance
Temperature Coefficient Of Resistance (TCR)
Bulk Packaging Options
Resistance
5 Contact customer service for custom designs and features.
