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HomeProductsResistorsThrough Hole ResistorsRN65D15R8FRE6
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RN65D15R8FRE6 - Vishay Dale

Manufacturer Part Number
RN65D15R8FRE6
Manufacturer
Dale / Vishay
Allelco Part Number
98D-RN65D15R8FRE6
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
41,399 pcs available, New & Original
Parts Description
RES 15.8 OHM 1/2W 1% AXIAL
Package
Axial
Data sheet
RN65D15R8FRE6.pdf
RoHs Status
 
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In stock: 41399
  • Unit Price: $0.446
  • Subtotal: $0.00

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Specifications

RN65D15R8FRE6 Tech Specifications
Vishay Dale - RN65D15R8FRE6 technical specifications, attributes, parameters and parts with similar specifications to Vishay Dale - RN65D15R8FRE6

Product Attribute Attribute Value
Manufacturer Dale / Vishay
Tolerance ±1%
Temperature Coefficient ±100ppm/°C
Supplier Device Package Axial
Size / Dimension 0.180' Dia x 0.562' L (4.57mm x 14.27mm)
Series Military, MIL-R-10509/2, RN65
Resistance 15.8 Ohms
Power (Watts) 0.5W, 1/2W
Package / Case Axial
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -65°C ~ 175°C
Number of Terminations 2
Height - Seated (Max) -
Features Flame Retardant Coating, Military, Moisture Resistant, Safety
Failure Rate -
Composition Metal Film
Base Product Number RN65

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) Not Applicable
ECCN EAR99
HTSUS 8533.21.0090

Frequently Asked Questions(FAQ)

What makes the RN65D15R8FRE6 suitable for military and aerospace applications compared to standard commercial resistors?
The RN65D15R8FRE6 is manufactured to MIL-R-10509/2 specification, which imposes stricter screening, testing, and quality control than commercial-grade components. The metal film construction with flame retardant coating and moisture-resistant characteristics ensures stable performance in harsh environments. The ±100ppm/°C temperature coefficient maintains predictable behavior across the -65°C to 175°C operating range, critical for circuits in unpressurized aircraft, ground vehicles, and space platforms where thermal cycling and humidity exposure are routine. The 15.8-ohm precision at ±1% tolerance combined with the 0.5W power rating supports reliable bias networks, temperature compensation circuits, and signal conditioning in avionics and defense systems where component drift can cascade into system-level failures.
How does the RN65D15R8FRE6's metal film construction affect its frequency response and noise characteristics in precision analog circuits?
Metal film resistors like the RN65D15R8FRE6 exhibit superior high-frequency performance compared to carbon-composition alternatives due to their structure—a thin resistive film deposited on a ceramic substrate rather than a bulk carbon matrix. This geometry reduces parasitic inductance and capacitance, making the RN65D15R8FRE6 better suited for signal conditioning, instrumentation amplifier feedback networks, and audio preamp applications where noise floor and distortion matter. The low inherent noise of the metal film 15.8-ohm element supports low-noise transimpedance amplifier designs and lock-in detector front ends. However, the axial lead geometry introduces approximately 1–2 nanohenries of lead inductance, which becomes relevant above 100 MHz; layout practices like minimizing loop area and using twisted-pair return paths help mitigate this effect in high-speed switched-mode or RF bias circuits.
What is the practical difference between the RN65D15R8FRE6's ±1% tolerance and a ±5% tolerance resistor in a precision current-sense application?
In a current-sensing shunt circuit, tolerance directly impacts measurement accuracy. If the RN65D15R8FRE6 at 15.8 ohms with ±1% tolerance is paired with a transimpedance amplifier to convert current to voltage, the initial calibration uncertainty is ±1%, or ±0.158 ohms. A ±5% component would introduce ±0.79 ohms of uncertainty—roughly five times worse. When sensing currents in the 0.5–5 ampere range (typical for battery management or motor control), the RN65D15R8FRE6's tighter tolerance reduces post-manufacturing trim adjustment or calibration overhead. Additionally, over the -65°C to 175°C operating window, the RN65D15R8FRE6's ±100ppm/°C coefficient contributes approximately ±1.5% drift across a 150°C span, which stacks with the initial tolerance but remains acceptable for applications requiring <2% total measurement error.
How should the RN65D15R8FRE6 be derated in high-ambient-temperature environments, and what happens if it approaches its 175°C maximum rating?
The RN65D15R8FRE6 is rated for 0.5W at 25°C. In environments where ambient exceeds 70°C, military and aerospace standards typically require linear derating—typically 0.5–1% power reduction per degree Celsius above 70°C. At 125°C ambient, applying 50% derating reduces the safe dissipation to 0.25W. Near the 175°C maximum junction temperature, the RN65D15R8FRE6's resistance value becomes increasingly temperature-sensitive; the ±100ppm/°C coefficient means a 50°C excursion produces a 0.5% resistance shift. In thermally constrained designs (e.g., downhole logging tools, engine-mounted sensor amplifiers), the RN65D15R8FRE6's flame-retardant coating and military qualification ensure it won't fail catastrophically, but derating calculations must account for self-heating. A 10 mA continuous current through 15.8 ohms dissipates 1.58 mW; a 1 A pulse dissipates 15.8 mW, requiring careful PCB thermal design to avoid exceeding the practical operating window.
In what design scenarios does the RN65D15R8FRE6's 0.5W rating prove limiting, and when should a higher-power alternative be considered?
The RN65D15R8FRE6's 0.5W rating is appropriate for small-signal bias, feedback, and low-current sensing circuits typical in data acquisition and control modules. However, in power distribution networks, load-switching circuits, or inductive-load transient suppression, even brief overcurrent events can exceed this margin. For example, in a soft-start circuit limiting inrush current to a 48V bus, calculating the resistor power dissipation over the soft-start ramp reveals whether 0.5W is adequate. A 10-ohm series resistor (closer to the RN65D15R8FRE6's 15.8-ohm value) limiting 10A inrush dissipates 1000W instantaneously—obviously excessive. Even average-case power calculations must account for duty cycle. In boost converter output feedback dividers or precision current-mirror biasing, the RN65D15R8FRE6 suffices because steady-state power dissipation rarely exceeds 50–100 mW. When designing circuits where peak power might transiently exceed 0.5W or sustained power exceeds 0.3W under worst-case conditions, substituting a 1W or 2W axial resistor (often available in the same 15.8-ohm value from Vishay Dale's portfolio) provides a safety margin without circuit redesign.
How does the RN65D15R8FRE6 compare to thin-film surface-mount resistors in terms of precision, stability, and manufacturing complexity?
The RN65D15R8FRE6 is an axial through-hole metal-film component, while modern precision circuits increasingly use thin-film surface-mount resistors (e.g., Vishay thin-film arrays) with tolerances of ±0.1% or better and temperature coefficients of ±25ppm/°C. The RN65D15R8FRE6's ±1% tolerance and ±100ppm/°C coefficient are less tight but adequate for many military and industrial applications. The trade-off is manufacturing ecosystem: the RN65D15R8FRE6 aligns with legacy through-hole PCB assembly infrastructure, familiar soldering and wave-soldering processes, and long-term component availability from qualified suppliers. Thin-film packages demand reflow soldering, tighter PCB design rules, and often higher unit costs. For retrofit or field-repair scenarios in military systems designed in the 1990s–2010s, the RN65D15R8FRE6 remains the drop-in replacement; new designs with space and precision constraints increasingly shift to SMD, but the RN65D15R8FRE6's robustness, thermal stability across -65°C to 175°C, and proven reliability history make it the preferred choice when through-hole construction is already committed.
What is the expected failure mode and end-of-life behavior of the RN65D15R8FRE6 under thermal cycling and vibration stress?
Metal-film resistors like the RN65D15R8FRE6 typically fail open (infinite resistance) rather than short. Under repeated thermal cycling between -65°C and 175°C (common in aerospace), the primary failure mechanism is lead fatigue at the solder joint due to coefficient-of-thermal-expansion mismatch between the copper leads and the PCB pad. The RN65D15R8FRE6's 0.180-inch diameter and 0.562-inch length place it in the mid-range for axial components; longer leads generally experience higher stress. Vibration (per MIL-STD-810H) can accelerate fatigue by creating micro-slip at the solder interface. The metal-film resistive element itself is extremely stable and rarely fails; instead, open-circuit conditions result from mechanical joint failure. Military procurement typically specifies accelerated life testing (ALT) with combined thermal and vibration stimulus to validate solder-joint reliability. In fielded systems, the RN65D15R8FRE6's observed mean time to failure (MTTF) under flight-profile cycling is measured in tens of thousands of hours. The flame-retardant coating reduces the risk of catastrophic failure if the resistor is inadvertently stressed; it chars rather than igniting, maintaining circuit integrity temporarily and allowing graceful degradation detection.
Why is the RN65D15R8FRE6 rated 'RoHS non-compliant,' and what are the implications for new military and commercial designs?
The RN65D15R8FRE6 is RoHS non-compliant primarily because its solder terminations likely contain lead (Pb), a substance restricted under the Restriction of Hazardous Substances (RoHS) Directive in the European Union. Military components, including those conforming to MIL-R-10509/2, often receive exemptions from RoHS due to the technical necessity of lead-based solder for reliability in extreme thermal and vibration environments. Lead-tin (Pb-Sn) solder exhibits superior creep resistance and joint longevity compared to lead-free (Pb-free) alternatives over the RN65D15R8FRE6's -65°C to 175°C operating range. New military designs in the US and allied nations can continue specifying the RN65D15R8FRE6 without RoHS concerns; however, EU procurement or export-controlled applications may encounter sourcing or regulatory friction. Commercial designs targeting RoHS compliance must either seek lead-free equivalents (which may sacrifice some thermal stability) or request RoHS exemptions from regulatory bodies. The REACH-Affected status indicates that the component's manufacturing process or materials are subject to EU chemical registration and evaluation, but this typically does not restrict purchase or use.
How should the RN65D15R8FRE6 be integrated into a precision transimpedance amplifier (TIA) front end for low-light photodiode sensing?
In a transimpedance amplifier, the feedback resistor (often a precision 10–100 kilohm component) sets the transimpedance gain, but the RN65D15R8FRE6's 15.8-ohm value is better suited for biasing and low-impedance signal conditioning roles. However, if a design cascade uses the RN65D15R8FRE6 as a low-value shunt element in a TIA output attenuator or a bias-network component, its ±1% tolerance and ±100ppm/°C stability become critical for maintaining gain linearity across temperature. Placing the RN65D15R8FRE6 in a high-impedance transimpedance node (such as a summing junction) requires careful PCB layout: keep lead lengths short (<10 mm where feasible), route trace away from high-speed clock or switching signals, and use a ground plane to minimize parasitic capacitance. The RN65D15R8FRE6's metal-film construction and relatively low noise (<25 nV/√Hz typical for 15.8-ohm film resistors) support dark-current-limited (DCL) detection in the nanoampere range, such as in single-photon-counting applications or ultra-low-light infrared imaging. The military-grade specifications ensure consistent noise performance across production batches, a requirement for space-based scientific instruments.
What is the thermal stability advantage of the RN65D15R8FRE6 in a power-supply reference divider network spanning military altitude and temperature profiles?
In military avionics and satellite systems, a voltage-reference divider must maintain output accuracy despite simultaneous altitude (vacuum or thin air), vibration, and thermal transients. A simple two-resistor divider using the RN65D15R8FRE6 as the lower element in a precision 5V reference network experiences output drift due to the ±100ppm/°C temperature coefficient. If the reference circuit must maintain ±1% accuracy over a -55°C to 125°C operational window (100°C span), the RN65D15R8FRE6's drift contribution is approximately ±1%, stacking with the initial ±1% tolerance to produce worst-case ±2% deviation. To minimize drift, designers often parallel multiple RN65D15R8FRE6 units or use trimmer potentiometers at the production test stage to null the combined tolerance and temperature effects. The metal-film construction of the RN65D15R8FRE6 ensures that its temperature coefficient remains linear (not subject to the non-linearity sometimes seen in carbon-film resistors), simplifying temperature-compensation calculations. In sealed, thermally controlled avionics bays, the RN65D15R8FRE6's stability is often sufficient; in external sensor-pod applications with direct sun/shadow cycling, supplementary thermal management or post-trim calibration becomes necessary.
Can the RN65D15R8FRE6 safely replace a carbon-film resistor in a legacy military circuit modification, and what potential issues should be evaluated?
Direct substitution of the RN65D15R8FRE6 (metal film, MIL-R-10509/2) for a carbon-film component is generally safe from an electrical standpoint—the 15.8-ohm value, 0.5W rating, and axial package are compatible—but design review is necessary. Carbon-film resistors exhibit higher noise (typically 50–200 nV/√Hz versus <25 nV/√Hz for metal film), so substitution may improve signal-to-noise ratio in sensitive analog circuits, a beneficial side effect. However, carbon-film components often have wider tolerance and higher temperature coefficients (±500–1000ppm/°C), meaning the circuit was potentially designed with looser specifications. If the RN65D15R8FRE6's tighter ±1% tolerance and lower ±100ppm/°C coefficient alter the circuit's bias point, feedback loop gain, or frequency response beyond intended margins, unintended behavior (oscillation, gain changes, or offset drift) can emerge. The RN65D15R8FRE6 may also have slightly different parasitic inductance due to manufacturing process changes, affecting high-frequency response in circuits operating above 10 MHz. Retrofit documentation should specify a functional test to confirm that circuit performance (gain, bandwidth, DC bias, noise figure) remains within specification after substituting the RN65D15R8FRE6 for the original component.
How does the RN65D15R8FRE6's package size and lead geometry influence PCB layout decisions for minimal EMI in high-speed digital control circuits?
The RN65D15R8FRE6's axial lead format (0.180-inch diameter, 0.562-inch length) creates a loop area that can act as an unintended antenna in high-frequency environments. The lead length of 0.562 inches (14.27 mm) corresponds to an inductive reactance of approximately 0.5–1 ohm at 100 MHz, which can couple common-mode noise into adjacent signal traces or create return-path impedance issues if grounding is not carefully managed. In digital control applications with fast-edge microcontroller outputs or PWM switching at >10 kHz, the RN65D15R8FRE6 should be soldered with minimal loop area: leads inserted vertically through the PCB and soldered on both sides, then placed close to ground or power planes. Twisted-pair routing of the leads before soldering can reduce loop inductance by up to 50%. The RN65D15R8FRE6's position relative to EMI sources (switching converters, high-speed clock nets) should maintain >1 inch separation where feasible, or surround the component with a Faraday cage (ground mesh) if space is constrained. In precision analog circuits where the RN65D15R8FRE6 functions as a bias or feedback element, placing it within a few millimeters of the op-amp or comparator it supports minimizes lead length and reduces susceptibility to differential-mode interference from nearby digital switching.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vishay Dale RN65D15R8FRE6

Product Attribute RN65D15R4FRE6 RN65D15R0FRE6 RN65D15R8FRSL RN65D15R0FR36
Part Number RN65D15R4FRE6 RN65D15R0FRE6 RN65D15R8FRSL RN65D15R0FR36
Manufacturer Vishay Dale Vishay Dale Vishay Dale Vishay Dale
Failure Rate - - - -
Size / Dimension - - - -
Height - Seated (Max) - - - -
Number of Terminations - - - -
Temperature Coefficient - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Resistance - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Tolerance - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Composition - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Features - - - Simultaneous Sampling
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Power (Watts) - - - -
Series - - - -

RN65D15R8FRE6 Datasheet PDF

Download RN65D15R8FRE6 pdf datasheets and Vishay Dale documentation for RN65D15R8FRE6 - Vishay Dale.

Datasheets
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HTML Datasheet
Cylindrical Battery Holders.pdf

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RN65D15R8FRE6 Image

RN65D15R8FRE6

Vishay Dale
98D-RN65D15R8FRE6

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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