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TNP10SC10R0FE Equivalent & Substitute Parts
Part Overview
The TNP10SC10R0FE is a 10 Ohm, 1% tolerance, 10W through-hole resistor manufactured by Ohmite in the TO-126-2 package. This thin film, moisture-resistant, non-inductive component is designed for precision applications requiring low resistance values with tight tolerance specifications. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 10 Ohms |
| Tolerance | ±1% |
| Power Rating | 10W |
| Composition | Thin Film |
| Package Type | TO-126-2 |
| Temperature Coefficient | ±50ppm/°C |
| Operating Temperature Range | -55°C to 155°C |
| Features | Moisture Resistant, Non-Inductive |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the TNP10SC10R0FE is determined by the following critical parameters:
- Resistance Value: Must be 10 Ohms (exact match required)
- Package Compatibility: Original TO-126-2 package is obsolete; substitutes use TO-220-2 package (different footprint, requires PCB redesign)
- Power Rating: Substitutes rated at 25W or 35W (exceeds 10W requirement, providing design margin)
- Tolerance: Substitutes at ±5% (relaxed from ±1%, acceptable for most applications)
- Composition: Substitutes use thick film (differs from thin film original)
- Temperature Coefficient: Substitutes at ±100ppm/°C to ±200ppm/°C (higher than ±50ppm/°C original)
- Compliance: All substitutes maintain ROHS3 compliance and moisture resistance
The two qualified substitutes are both manufactured by Ohmite and maintain the same 10 Ohm resistance value with active product status and higher power ratings suitable for current sense applications.
Parameter Comparison
| Parameter | TNP10SC10R0FE (Main) | TBH25P10R0JE (Substitute 1) | AP836 10R J (Substitute 2) |
|---|---|---|---|
| Manufacturer | Ohmite | Ohmite | Ohmite |
| Resistance | 10 Ohms | 10 Ohms | 10 Ohms |
| Tolerance | ±1% | ±5% | ±5% |
| Power Rating | 10W | 25W | 35W |
| Composition | Thin Film | Thick Film | Thick Film |
| Package Type | TO-126-2 | TO-220-2 | TO-220-2 |
| Temperature Coefficient | ±50ppm/°C | ±200ppm/°C | ±100ppm/°C |
| Operating Temperature | -55°C to 155°C | -55°C to 150°C | -60°C to 150°C |
| Features | Moisture Resistant, Non-Inductive | Current Sense, Moisture Resistant, Non-Inductive | Non-Inductive |
| Product Status | Obsolete | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
TBH25P10R0JE is the manufacturer-recommended primary substitute. This 25W TO-220-2 resistor provides adequate power margin over the original 10W specification and includes current sense capability. Active product status ensures long-term availability. The ±5% tolerance is acceptable for applications where the original ±1% specification is not critical to circuit function.
AP836 10R J is the secondary substitute option. This 35W TO-220-2 resistor offers the highest power rating and lowest temperature coefficient (±100ppm/°C) among substitutes, providing superior thermal stability. Active product status and REACH compliance support extended production lifecycles.
Both substitutes require PCB layout modification due to TO-220-2 package footprint differences from the original TO-126-2 package. Selection between the two substitutes depends on available PCB space, thermal management requirements, and tolerance specifications for the target application.
Frequently Asked Questions (FAQ)
Q: Can TNP10SC10R0FE be directly replaced without PCB modification?
A: No. The original TO-126-2 package is obsolete. Both qualified substitutes use the TO-220-2 package, which has a different footprint and pin spacing. PCB redesign is required.
Q: What is the impact of ±5% tolerance versus ±1% tolerance?
A: The tolerance relaxation from ±1% to ±5% increases the resistance variation range from ±0.1 Ohms to ±0.5 Ohms. This is acceptable for most current sense and general-purpose applications but may require circuit analysis for precision measurement or calibration-dependent designs.
Q: Why do substitute parts have higher power ratings?
A: The 25W and 35W ratings provide design margin and thermal headroom beyond the original 10W specification. Higher power ratings do not negatively affect circuit function; they indicate improved thermal dissipation capability.
Q: How do temperature coefficients affect circuit performance?
A: The original ±50ppm/°C specification provides tighter resistance stability across temperature ranges. Substitutes at ±100ppm/°C to ±200ppm/°C exhibit greater resistance drift with temperature. For temperature-sensitive applications, AP836 10R J (±100ppm/°C) is preferred over TBH25P10R0JE (±200ppm/°C).
Q: Are both substitutes suitable for current sense applications?
A: Yes. Both maintain non-inductive characteristics and moisture resistance. TBH25P10R0JE explicitly includes current sense designation. AP836 10R J is suitable for current sense use despite not carrying this designation.
Q: What is the inventory status of substitute parts?
A: TBH25P10R0JE: 3008 units in stock. AP836 10R J: 1449 units in stock. Both are actively manufactured and available for procurement.
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