Low Ohmic Ultra Precision Resistors (NE)

precision resistors metal film

Direct advanced film (NE) low resistance ultra precision resistors spell high precision.

A homogenous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper are welded to the end-caps.

The resistors are moulding which provides electrical, mechanical, and climatic protection.

Direct has complete capability to develop specific reliability programs designed to customer requirements. Products equate Vishay, Ohmite, Caddock, IRC, EBG, Panasonic Precision Devices with more competitive price and fast delivery.

Full line products meet RoHS compliant. Detailed specifications, both mechanical and electrical, can be download here Low Ohmic Ultra Precision Resistor PDF (318KB), or contact our sales representative for more information.

MIL-PRF-55182 :
The NE series meets the electrical, environmental and dimensional requirements of MIL-PRF-55182.
Referencing to Chinese National Quality Standard GJB244A-2001.

POWER RATING :
Power ratings are based on the following two conditions,
  1. ± 2.0 % maximum ΔR in 10 000 h load life.
  2. + 175 °C maximum operating temperature.
Applications :
  1. Measuring and calibration equipment
  2. Industrial process control systems
  3. Space and aircraft electronics
  4. Test and measurement
  5. Telecom
Features :
  1. Direct NE Series meets MIL-PRF-55182 and GJB244A-2001 quality standards.
  2. Controlled temperature coefficient and narrowed to C7 (±5PPM/°C).
  3. Extensive stocking program at distributors and factory.
  4. Extreme precision tolerance tight to A5(±0.05%).
  5. Caps range of ultra low resistance 0.05Ω ~ 10Ω.
  6. Excellent stability and High reliability.
  7. Industrial grades, RoHS Compliant.
  8. Metal film moulding type
Dimensions & Technical Characteristics (NE)
Mold Type (NE) Dimensions
Mold Type (NE) Dimensions
(NE) Power Derating Curve
(NE) Power Derating Curve
Type NE1/20 NE1/10 NE1/8 NE1/4 NE1/2
Rated Wattage (W) 70 °C 0.125 (1/8W) 0.25 (1/4W) 0.5 (1/2W) 0.75 W 1 W
Max. Working Voltage (V) 200V 200V 250V 300V 350V
Resistance Range (Ω) 0.05 ~ 10 0.05 ~ 10 0.05 ~ 10 0.05 ~ 10 0.05 ~ 10
Dimensions (Unit: mm) L ± 0.3 4.3 6.8 10.2 15.1 18.4
D ± 0.4 1.9 2.5 3.8 5.2 6.5
A ± 0.05 0.40 0.60 0.60 0.60 0.80
Working Temperature Range -55°C ~ +175°C
Nominal Resistance Tolerance
J(±5.0%) F(±1.0%)
D(±0.5%) C(±0.25%)
B(±0.10%)
A5(±0.05%)

all resistance:
0.05Ω≤R<1Ω:
1Ω≤R<5Ω:
5Ω≤R≤10Ω:
  J
  J / F
  B / C / D / F
  A5 / B / C / D / F
Temperature Coefficient PPM
Normal test range(+25°C ~ +85°C)
0.05Ω≤R<1Ω:
1Ω≤R<5Ω:
5Ω≤R≤10Ω:
  >±100PPM/°C
  C2(±50PPM/°C), C3(±25PPM/°C), C5(±15PPM/°C), C6(±10PPM/°C)
  C2(±50PPM/°C), C3(±25PPM/°C), C5(±15PPM/°C),   C6(±10PPM/°C), C7(±5PPM/°C)
Remark: Please contact Direct's Representatives if your requirement is not in above range.
Mechanical and Electrical Test Conditions (NE)
Type Item Method Requirement
Long Period Life time GJB244A (MIL-PRF-55182) 4.8.18
Rated Wattage,125°C,2000h,10000h
GJB244A (MIL-PRF-55182) 3.24
ΔR≤±(0.5%R+0.01Ω)
ΔR≤±(2%R+0.01Ω)
Humidity GJB244A (MIL-PRF-55182) 4.8.18
-10°C ~ +65°C, RH<90%
Rated Wattage, Cycle 240h.
GJB244A (MIL-PRF-55182) 3.21
ΔR≤±(0.4%R+0.01Ω)
High temp exposed GJB244A 4.8.19
175°C 2000h
GJB244A (MIL-PRF-55182) 3.25
ΔR≤±(2.0%R+0.01Ω)
Short Period Dielectric voltage GJB244A (MIL-PRF-55182)
4.8.12/4.8.23/4.8.10
GJB244A (MIL-PRF-55182) 3.18/3.29/3.16
ΔR≤±(0.15%R+0.01Ω)
no physical damage, arc,
isolation break through
Lead strength
Impact
High frequency vibration
GJB244A (MIL-PRF-55182)
4.8.11/4.8.16/4.8.17
GJB244A (MIL-PRF-55182) 3.17/3.22/3.23
ΔR≤±(0.20%R+0.01Ω)
no physical damage
Solderability GJB244A (MIL-PRF-55182) 4.8.14 GJB244A (MIL-PRF-55182) 3.20
ΔR≤±(0.10%R+0.01Ω)
no physical damage
Order Codes (NE)
NE1/8 0.5W 10R B C6 P
Part Number
NE1/20
NE1/10
NE1/8
NE1/4
NE1/2
Rated Power
(W)
NE1/20 70°C 0.125W
NE1/10 0.25W
NE1/8 0.5W
NE1/4 0.75W
NE1/2 1.0W
Resistance Value
(Ω)
0R1 0.1Ω
1R
10R 10Ω
Resistance Tolerance
(%)
A5 ±0.05%
B ±0.10%
C ±0.25%
D ±0.50%
F ±1.00%
J ±5.00%
Temperature coefficient
(PPM/°C)
C2 ±50ppm/°C
C3 ±25ppm/°C
C5 ±15ppm/°C
C6 ±10ppm/°C
C7 ±5ppm/°C
Package
P Bulk