| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
Ohmite |
HIGH CURRENT SHUNT 500AMPS |
99 |
|
|
Ohmite |
175 W 50 OHMS 10% |
8 |
|
|
Ohmite |
RES BRAKE BLEEDER 5 OHM 10% 175W |
0 |
|
|
Ohmite |
RES CAP BLEEDER 40K OHM 5% 13W |
0 |
|
|
Ohmite |
200 W 25 OHMS 10% |
32 |
|
|
Ohmite |
RES CAP BLEEDER 50K OHM 5% 10W |
150 |
|
|
Ohmite |
HIGH CURRENT SHUNT 800AMPS |
99 |
|
|
Ohmite |
22KCAPACITOR MOUNT 5% |
4100 |
|
|
Ohmite |
HIGH CURRENT SHUNT 500 AMPS |
16 |
|
|
Ohmite |
175 W 150 OHMS 10% |
2 |
|
|
Ohmite |
175 W 500 OHMS 10% |
20 |
|
|
Ohmite |
175 W 100 OHMS 10% |
19 |
|
|
Ohmite |
RES CAP BLEEDER 1K OHM 5% 13W |
300 |
|
|
Ohmite |
175 W 100 OHMS 10% |
12 |
|
|
Ohmite |
RES CAP BLEEDER 7.5K OHM 5% 10W |
900 |
|
|
Ohmite |
250 W 24 OHMS 10% |
5 |
|
|
Ohmite |
270 W 6 OHMS 10% |
0 |
|
|
Ohmite |
HIGH CURRENT SHUNT 300AMPS |
93 |
|
|
Ohmite |
RES BRAKE BLEEDER 10OHM 10% 175W |
0 |
|
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