THIN FILM CHIP RESISTORS
61 Series 0.030” x 0.030”
Spectrum Microwave 61 Series 0.030 x 0.030 Thin-film Resistor Chips are available in a wide range of resistances and
tolerances. Values are available from 1.25 ohms to 1 megohm. Center-tapped resistors are standard for values up to
500 K. Applications include military and industrial hybrids, and medical, aerospace and communications equipment.
61 Series resistor chips are available with either passivated nichrome or tantalum-nitride resistor metalization. Nichrome
provides excellent stability and temperature coefficient in hermetic applications while tantalum-nitride provides superior
moisture-resistance for non-hermetic applications.
Spectrum Microwave
Tel: 508-485-6350 Fax: 508-485-5168
165 Cedar Hill Street, Marlborough, Ma 01752
www.SpectrumMicrowave.com
Electrical Specifications
Parameter Limit Test Conditions
Power Rating 200 mW (derated at 70° to 0 mW @ 150°)
Life ±0.2% max 1000 hours @ 125° C
Noise -35 dB typ MIL-STD-202 method 308
High Temp Exposure ±0.2% max 100 hours at 150° C
TCR (61AC, 61AL) ±50 ppm/°C -55° to 125° C
TCR (61ACT) -50 to -120 ppm/°C -55° to 125° C
Operating voltage 100 VDC max
Moisture resistance ±0.5% max MIL-STD-202 method 106
Thermal shock ±0.5% max MIL-STD-202 method 107
Mechanical Specifications
Substrate Silicon with 1 micron thermal oxide
Bond pad metalization Gold, 100 microinches
Size 0.031 x 0.031 ±0.002 (0.78 x 0.78 mm ±0.05 mm)
Thickness 0.013 ±0.003 (0.33 ±0.07 mm)
Bond pad dimensions 0.004 x 0.004 minimum (0.1 x 0.1 mm)
Protective overcoat (passivation) 0.6 microns SiO2 (61AC & 61AL versions only)
Back side Lapped silicon
Typical Configurations
Spectrum Microwave also manufactures Custom Substrates on a variety of materials, a wide range of Microwave, PIN
Diode Drivers, and Custom Hybrid Circuits. Please contact the factory or your local representative for more information.
(Specifications subject to change without notice.)
THIN FILM CHIP RESISTORS
61 Series 0.030” x 0.030”
All parts are 100% electrically tested, sample tested per MIL-STD-38534 section 3.4, and
visually inspected to MIL-STD-883 requirements. Chips are supplied in standard 2" x 2"
matrix tray packaging.
Base Part Code
61xxx-
61AC (Nichrome center-tapped)
61AL (Nichrome, no center-tap,
values above 500K only)
61ACT (Tantalum-nitride center-
tapped)
Value (3 digits plus exponent)
NNNE
(Under 100 ohms, an R indicates the
decimal point location.)
Tolerance Letter
X
B = 0.1%
C = 0.25%
D = 0.5%
F = 1%
G = 2%
J = 5%
K = 10%
M = 20%
Ordering examples:
61AC-5002K is a 50 kilohm 10% center-tapped resistor with nichrome metalization.
61AL-1004J is a 1 megohm 5% resistor with nichrome metalization.
61ACT-50R1F is a 50.1 ohm 1% center-tapped resistor with tantalum-nitride metalization.
Availability and Limitations:
61AC series is available from 2.5 ohms to 600 kohms.
61AL series is available from 250 kohms to 1 megohm.
61ACT series is available from 1.25 ohms to 300 kohms.
B tolerance is available above 250 ohms.
C tolerance is available above 100 ohms.
D tolerance is available above 50 ohms.
F tolerance is available above 25 ohms.
G tolerance is available above 12 ohms.
J tolerance is available above 5 ohms.
Ordering Information
