| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Ohmite |
RES CAP BLEEDER 75K OHM 5% 13W |
0 |
|
 |
Ohmite |
6918 SHUNT 500A PIN |
0 |
|
 |
Ohmite |
8518 SHUNT 600A M3 |
6 |
|
 |
Ohmite |
RES CAP BLEEDER 2.5K OHM 5% 10W |
900 |
|
 |
Ohmite |
RES CAP BLEEDER 25K OHM 5% 13W |
0 |
|
 |
Ohmite |
8518 SHUNT 600A PIN |
6 |
|
 |
Ohmite |
6918 SHUNT 500A M3 |
10 |
|
 |
Ohmite |
RES CAP BLEEDER 40K OHM 5% 10W |
450 |
|
 |
Ohmite |
RES CAP BLEEDER 7.5K OHM 5% 13W |
0 |
|
 |
Ohmite |
6918 SHUNT 700A PIN |
78 |
|
 |
Ohmite |
RES CAP BLEEDER 75K OHM 5% 10W |
0 |
|
 |
Ohmite |
8518 SHUNT 840A M3 |
14 |
|
 |
Ohmite |
RES CAP BLEEDER 15K OHM 5% 13W |
800 |
|
 |
Ohmite |
8518 SHUNT 840A PIN |
2 |
|
 |
Ohmite |
RES CAP BLEEDER 50K OHM 5% 13W |
0 |
|
 |
Ohmite |
RES CAP BLEEDER 20K OHM 5% 13W |
0 |
|
 |
Ohmite |
RES CAP BLEEDER 20K OHM 5% 10W |
425 |
|
 |
Ohmite |
RES CAP BLEEDER 15K OHM 5% 10W |
600 |
|
 |
Ohmite |
8536 SHUNT 1000A M3 |
4 |
|
 |
Ohmite |
RES CAP BLEEDER 5K OHM 5% 10W |
900 |
|
Specialized resistors are precision-engineered passive components designed for specific performance requirements beyond standard resistors. They play critical roles in applications requiring high accuracy, power handling, environmental stability, or unique electrical characteristics. These components enable advanced functionality in modern electronics, from aerospace systems to medical devices.
| Type | Key Features | Applications |
|---|---|---|
| High-Precision Resistors | Tight tolerance ( 0.01%), low TCR (5-25ppm/ C) | Test equipment, precision amplifiers |
| High-Power Resistors | 25W-1000W ratings, robust thermal management | Industrial heaters, power supplies |
| PTC/NTC Thermistors | Temperature-dependent resistance ( 5% to 50%) | Temperature sensing, inrush current control |
| Fusible Resistors | Current-limiting with precise melting characteristics | Safety circuits, motor protection |
| Variable Resistors | Adjustable resistance (10 -5M range) | Audio equipment, sensor calibration |
Typical construction includes: - Resistance Element: Thin-film (NiCr, TaN), thick-film (metal glaze), or wirewound (Kanthal) - Substrate: Alumina ceramic, silicon carbide, or aluminum nitride - Terminations: Silver/palladium or tin/lead alloy for solderability - Protective Coating: Epoxy, silicone, or glass encapsulation - Heat Dissipation: Finned housings or aluminum bodies for power variants
| Parameter | Description | Importance |
|---|---|---|
| Resistance Range | 1 to 10T | Determines current-voltage relationship |
| Tolerance | 0.001% to 10% | Affects circuit accuracy |
| Power Rating | 0.1W to 1kW | Prevents thermal damage |
| Temperature Coefficient | 5 to 5000ppm/ C | Stability over operating range |
| Operating Temperature | -55 C to +300 C | Environmental reliability |
| Stability/Voltage Coefficient | 0.1% change/year | Long-term performance |
| Manufacturer | Key Products |
|---|---|
| Vishay Precision Group | Thin Film Chip Resistors (TFR Series) |
| Bourns Inc. | High-Power Wirewound Resistors (CXP Series) |
| Ohmite Mfg. Co. | Chassis Mount Resistors (1100 Series) |
| TT Electronics | AccuSensors Thin Film Resistors |
| ROHM Co., Ltd. | Automotive NTC Thermistors (MTH Series) |
Key considerations: - Required tolerance vs. operating temperature range - Power dissipation requirements with safety margin (1.5x rating) - Environmental factors (humidity, vibration, EMI) - Long-term stability needs (medical vs. industrial) - Cost vs. performance trade-offs
Example: For medical imaging equipment, select 0.1% tolerance resistors with <25ppm/ C TCR in hermetically sealed packages.
Emerging developments include: - Miniaturization: 01005 (0.4mm x 0.2mm) package sizes - Advanced materials: Graphene-enhanced composites (50% lower TCR) - Integrated solutions: Resistor networks with built-in thermal sensing - High-frequency optimization: <0.1pF parasitic capacitance for RF applications - Sustainability: Halogen-free and RoHS-compliant packaging solutions