MFR-25FRF52-1K5 - 1.5 kOhm 1% 0.25W Axial Metal Film Resistor | YAGEO
MPN: MFR-25FRF52-1K5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1 | $0.10 |
| 10 | $0.08 | $0.80 |
| 100 | $0.05 | $5.00 |
| 500 | $0.04 | $20.00 |
| 1,000 | $0.03 | $30.00 |
| 5,000 | $0.02 | $100.00 |
MFR-25FRF52-1K5 Overview
A metal film resistor is a passive component whose resistive element is a metallic film (often nickel-chromium) sputtered or vacuum-deposited onto a high-purity ceramic substrate, then laser- or helix-trimmed to a precise value. Within the broader passive-component taxonomy, metal film resistors sit between carbon film (cheaper, noisier, worse TCR) and wirewound (high power, low resistance) parts, and are the standard choice for low-noise precision circuits. The MFR Series is YAGEO's workhorse general-purpose metal film line, and the 25-size code denotes a 0.25W rated axial body.
Key features include a resistance of 1.5 kOhm at ±1% tolerance, a maximum working voltage of 250V, an operating temperature range of -55 °C to +155 °C, and an axial-lead form suited to automatic insertion and wave soldering. The 100 ppm/°C TCR delivers an end-of-life resistance shift on the order of 0.25% over a 25 °C temperature excursion at 1.5 kOhm, supporting precision bias networks, op-amp gain stages, and ADC reference ladders where drift would degrade accuracy.
Technically, the MFR Series uses a homogeneous metal film with welded terminations and a flame-retardant epoxy coating. The combination of tight tolerance, low noise, and AEC-Q200 automotive qualification distinguishes it from generic carbon-film 1/4W parts, which typically show 5% tolerance and 350-500 ppm/°C TCR.
Typical applications include op-amp feedback networks, current-sense biasing with high-side or low-side amplifiers, MCU pull-up/pull-down resistors, audio pre-amp gain stages, ADC input dividers, and general signal-conditioning networks. The AEC-Q200 qualification extends its use into automotive body electronics, HVAC controllers, and infotainment modules.
When designing with this part, derate power at high ambient temperatures: above 70 °C, permissible dissipation drops linearly to zero at 155 °C. Keep lead-bend stress below 1 kg to avoid cracking the ceramic body, and maintain a minimum lead clearance of 5 mm between the body and the PCB for proper flux wash.
Drop-in alternatives for MFR-25FRF52-1K5 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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MFR-25FRF52-1K5 Maximum Ratings & Electrical Characteristics
| Resistance | 1.5 kOhm |
| Resistance Tolerance | ±1% |
| Power Rating | 0.25 W (1/4 W) |
| Temperature Coefficient (TCR) | ±100 ppm/°C |
| Maximum Working Voltage | 250 V |
| Maximum Overload Voltage | 500 V |
| Operating Temperature Range | -55 °C to +155 °C |
| Package / Case | Axial Through-Hole (MFR Series, 25 size) |
| Mounting Type | Through Hole |
| Resistor Element Material | Metal Film (NiCr on ceramic) |
| Termination Style | Axial Leads, Tinned |
| Packaging | Tape & Reel (T/R) |
| Automotive Qualification | AEC-Q200 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Series | MFR (YAGEO) |
MFR-25FRF52-1K5 axial through-hole (mfr series, 25 size) Pin Configuration Guide
Pin configuration for MFR-25FRF52-1K5 (axial through-hole (mfr series, 25 size) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for MFR-25FRF52-1K5.
Refer to the datasheet for full pin configuration.
Typical Applications
MFR-25FRF52-1K5 is suitable for 6 applications: Op-Amp Feedback Network, ADC Input Voltage Divider, MCU Pull-Up / Pull-Down, Automotive Body Electronics, Audio Pre-Amplifier Gain Stage, Current-Limiting for Indicator LEDs.
Op-Amp Feedback Network
The MFR-25FRF52-1K5's 1.5 kOhm value and ±1% tolerance make it a natural fit as the feedback or input resistor in non-inverting op-amp gain stages. The ±100 ppm/°C TCR (equivalent to 0.15 ohm drift per °C at 1.5 kOhm) keeps the closed-loop gain stable over automotive and industrial temperature swings, while the 0.25 W power rating easily handles the sub-mW dissipation typical of op-amp feedback paths. Designers commonly pair this part with a second MFR-Series resistor (e.g., 1 kOhm feedback) to build a gain-of-2.5 amplifier block with predictable gain accuracy across -40 °C to +125 °C operation. The axial package is also ideal for hand-replaceable prototype boards and laboratory instrumentation.
Recommended
ADC Input Voltage Divider
The 1.5 kOhm value of MFR-25FRF52-1K5 is well-suited for ADC input divider ladders where a 3:1 or 1:1 ratio is needed with a 5V or 3.3V rail. Pairing it with an MFR-25FRF52-3K or MFR-25FRF52-1K produces a 1:2 or 1:1 divider with predictable scaling; the ±1% initial tolerance keeps the divided voltage within one LSB of an 8-bit ADC at 5V reference, while the ±100 ppm/°C TCR contributes negligible gain error over temperature. The 250V maximum working voltage comfortably exceeds the transient overvoltages seen on industrial sensor inputs. For automotive sensor signal conditioning, AEC-Q200 qualification of MFR-25FRF52-1K5 ensures it survives engine-bay thermal cycling and vibration per YAGEO's qualification data.
Recommended
MCU Pull-Up / Pull-Down
As a digital pull-up or pull-down on I/O lines, I2C buses, or reset pins, the MFR-25FRF52-1K5's 1.5 kOhm provides a strong 2-3 mA bias when tied to a 3.3V or 5V rail. This is enough to overcome moderate noise injection on long PCB traces, while still staying within the 0.25W power rating even under continuous fault conditions (V²/R = 11 mW at 5V). The metal film construction's low 1/f noise versus carbon film makes it a better choice for ADC reference lines and low-impedance analog signal paths than typical carbon-film pull-ups. AEC-Q200 qualification extends reliability to automotive body and chassis controllers where MFR-25FRF52-1K5 may be used on LIN, CAN, or local sensor interfaces.
Recommended
Automotive Body Electronics
The MFR-25FRF52-1K5's AEC-Q200 qualification makes it directly usable on automotive body and chassis electronics PCBs, including HVAC control modules, mirror adjusters, lighting drivers, and instrument-cluster signal paths. The 0.25W rating covers the typical sub-50 mW dissipation in sensor biasing and LED driver current-setting networks, and the ±100 ppm/°C TCR maintains accuracy over -40 °C to +125 °C under-hood thermal stress. YAGEO's automotive-grade certification covers thermal-shock, biased-humidity, and mechanical-vibration testing per AEC-Q200, so designers can drop this qualification into safety-relevant PCB design flows. The axial form factor also suits wave-soldered through-hole production lines common in automotive Tier-1 factories.
Recommended
Audio Pre-Amplifier Gain Stage
For audio pre-amplifier input and feedback networks, the MFR-25FRF52-1K5's metal film construction delivers lower thermal and 1/f noise than equivalent carbon-film resistors, which directly translates to a lower noise floor in microphone preamps, phono stages, and line receivers. The 1.5 kOhm value pairs with a 1 kOhm source impedance or 470 ohm gain resistor to set typical 6-20 dB gain stages. ±1% tolerance and ±100 ppm/°C TCR ensure channel-to-channel gain matching in stereo designs and stable gain over the operating temperature range, critical for HiFi preamps and pro-audio mixers. The 250V working voltage is also well above any audio signal swing, giving ample headroom for transients.
Recommended
Current-Limiting for Indicator LEDs
A 1.5 kOhm MFR-25FRF52-1K5 used as an LED current-limit resistor at 5V supply produces roughly 2.3 mA through a standard 2V Vf indicator LED - a comfortable brightness level for panel indicators, status LEDs, and optocoupler inputs. The 0.25W rating means the resistor dissipates about 11 mW, far below its thermal limit. Using a ±1% tolerance metal film part keeps LED brightness uniform across boards, unlike ±5% carbon-film parts which produce visibly different intensities. AEC-Q200 qualification is valuable when these LEDs sit on automotive dashboards or industrial HMI panels where the part must survive thermal cycling and vibration.
Recommended
Recommended Products Summary
Engineering reference data for MFR-25FRF52-1K5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | FMF-25FRF52-1K5 | MFR-25FBF52-1K5 | CMF551K5000FKEB | RNF14FTD1K500 | MF1/4DCT52A1501F |
|---|---|---|---|---|---|---|
| Brand | YAGEO | YAGEO | YAGEO | Vishay Intertechnology | Stackpole Electronics | KOA Speer Electronics |
| Package | Axial Through-Hole (MFR-25 size) | Axial Through-Hole (FMF-25 size) - same | Axial Through-Hole (MFR-25 size) - same | Axial Through-Hole (CMF55 size) - same axial form | Axial Through-Hole (RNF14 size) - same axial form | Axial Through-Hole (MF1/4 size) - same axial form |
| Resistance | 1.5 kOhm | 1.5 kOhm | 1.5 kOhm | 1.5 kOhm | 1.5 kOhm | 1.5 kOhm |
| Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% | ±1% |
| Power Rating | 0.25 W | 0.25 W | 0.25 W | 0.25 W | 0.25 W | 0.25 W |
| TCR | ±100 ppm/°C | ±100 ppm/°C | ±50 ppm/°C (tighter) | ±100 ppm/°C | ±100 ppm/°C | ±100 ppm/°C |
| Maximum Working Voltage | 250 V | 250 V | 250 V | 250 V | 250 V | 250 V |
| Automotive Qualification | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 | AEC-Q200 |
| Special Feature | General-purpose metal film | Flame-proof safety construction | Tighter ±50 ppm/°C TCR | Vishay military-grade heritage | Standard precision | KOA standard precision |
Key Differentiators
- AEC-Q200 automotive qualification as part of the standard catalog offering (vs Generic carbon-film 1/4W 1.5 kOhm resistor)
- Tighter TCR and tolerance vs carbon film at comparable price (vs Generic carbon-film 1/4W 1.5 kOhm resistor)
- Direct YAGEO cross-brand drop-in equivalents available (vs Single-source YAGEO-only stock)
Design Notes
Apply proper power derating above 70 °C ambient. The MFR-25FRF52-1K5 is rated 0.25W at 70 °C, derating linearly to zero at 155 °C. In sealed enclosures or near heat-generating components, calculate worst-case dissipation as V²/R for the highest voltage that can appear across the resistor, and confirm junction temperature rise stays below the derated limit. A typical 5V rail through 1.5 kOhm dissipates only 17 mW, so power is rarely the binding constraint at low voltages.
Avoid bending the leads less than 2 mm from the resistor body. The MFR-25FRF52-1K5 has a ceramic substrate and metal film layer that can crack if the lead is bent too close, causing intermittent resistance or open failures. Use a lead-bend radius of at least 1.5x the lead diameter and support the body with flat-nose pliers when forming leads. Also avoid using this part in circuits where it will see pulse power above 1W even for short durations - the metal film element can degrade and shift resistance permanently.
Maintain at least 5 mm of clearance between the resistor body and the PCB solder joint for proper flux wash and to prevent trapping contaminants under the part. For high-impedance circuits (e.g., op-amp inputs >100 kOhm equivalent), keep the MFR-25FRF52-1K5 traces short and away from switching nodes to minimize leakage and stray capacitance. In precision divider networks, orient the resistor body perpendicular to expected heat flow to reduce thermal gradient-induced resistance shift.
Compliance Information
AEC-Q200 qualified (automotive passive component stress test, not AEC-Q100 which is for active ICs). RoHS and REACH compliant per YAGEO product page. Halogen-free status not explicitly stated in verified data.
