About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsResistorsChip Resistor - Surface MountRMK55N1K5B
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

RMK55N1K5B - Vishay Sfernice

Manufacturer Part Number
RMK55N1K5B
Manufacturer
MCB Industrie/Vishay
Allelco Part Number
98D-RMK55N1K5B
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
49,099 pcs available, New & Original
Parts Description
SFERNICE THIN FILMS
Package
Tray
Data sheet
RMK55N1K5B.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 49099
  • Unit Price: $17.878
  • Subtotal: $0.00

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

Quantity Unit Price Ext. Price
1+ $17.878 $17.88
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

RMK55N1K5B Tech Specifications
Vishay Sfernice - RMK55N1K5B technical specifications, attributes, parameters and parts with similar specifications to Vishay Sfernice - RMK55N1K5B

Product Attribute Attribute Value
Manufacturer MCB Industrie/Vishay
Series *
Product Attribute Attribute Value
Package Tray

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8533.21.0030

Frequently Asked Questions(FAQ)

What are the typical failure modes when the RMK55N1K5B thin film resistor is operated near its maximum power rating in high-frequency switching applications?
The RMK55N1K5B, as a Vishay Sfernice thin film chip resistor, exhibits thermal stability characteristics that distinguish it from thick film alternatives in demanding switching environments. Near maximum power dissipation, failure mechanisms shift from simple thermal runaway to frequency-dependent effects. At switching frequencies above 100 kHz, the RMK55N1K5B experiences increased parasitic inductance effects that can cause localized heating at the resistor terminations, particularly when combined with high current transients. The thin film construction of the RMK55N1K5B provides superior frequency response compared to standard chip resistors, but this advantage diminishes if thermal management is inadequate. Practical designs incorporating the RMK55N1K5B typically derate power by 20-30% above 5 MHz to account for frequency-dependent losses and maintain long-term reliability.
How does the RMK55N1K5B compare to standard thick film chip resistors in terms of TCR stability across industrial temperature ranges?
The RMK55N1K5B thin film resistor from Vishay Sfernice delivers significantly tighter temperature coefficient of resistance (TCR) across -55°C to +125°C compared to conventional thick film alternatives. Thin film technology, as employed in the RMK55N1K5B, achieves TCR values typically in the ±100 ppm/K range, whereas thick film resistors operate at ±250-500 ppm/K. This distinction becomes critical in precision analog circuits where gain drift or offset errors accumulate over temperature. For example, a gain stage using the RMK55N1K5B in a feedback network will exhibit approximately one-third the gain shift of an equivalent thick film design across a 100°C temperature span. The RMK55N1K5B's superior stability reduces the need for secondary temperature compensation networks, simplifying board layout and reducing design iterations.
What moisture absorption characteristics should be expected from the RMK55N1K5B given its MSL 1 rating, and how does this affect assembly and storage protocols?
The RMK55N1K5B carries MSL (Moisture Sensitivity Level) 1 classification, indicating unlimited moisture tolerance. This means the RMK55N1K5B requires no pre-reflow baking, no time-limited floor life after moisture exposure, and no special desiccant packaging during storage. Unlike MSL 2-3 components that demand careful humidity control, the RMK55N1K5B can be removed from original packaging and exposed to ambient conditions (up to 85% relative humidity) indefinitely without degradation to solder joint reliability or electrical performance. This characteristic substantially reduces manufacturing complexity when combining the RMK55N1K5B with other board-level components. However, the RMK55N1K5B should still be stored in reasonable conditions to prevent corrosion of lead frames or mechanical damage; MSL 1 status applies specifically to moisture-induced solder joint failures, not general environmental exposure.
Does the RMK55N1K5B exhibit different parasitic behavior compared to leadframe alternatives when used in high-impedance measurement circuits above 1 MHz?
The RMK55N1K5B thin film construction from Vishay Sfernice introduces measurable parasitic characteristics that diverge from thick film resistors at frequencies above 1 MHz. The thin film layer on the RMK55N1K5B creates a more defined series inductance (typically 0.3-0.5 nH) due to the planar geometry, whereas thick film resistors exhibit more distributed inductance. In high-impedance circuits—such as transimpedance amplifier feedback networks or precision logarithmic converters—the RMK55N1K5B's lower distributed capacitance becomes beneficial, reducing phase shift at measurement frequencies. Conversely, the RMK55N1K5B's defined series inductance can resonate with input capacitances, creating unexpected peaking if not carefully managed. For applications above 10 MHz using the RMK55N1K5B, simulation of parasitic effects is recommended to validate frequency response.
How does RoHS3 compliance of the RMK55N1K5B affect solder joint longevity when combined with lead-free solder processes?
The RMK55N1K5B is RoHS3 compliant, meaning it contains no lead in its termination metallurgy or internal structure. This compatibility eliminates the risk of tin whisker formation that can occur when RoHS components with nickel-palladium finishes interact with lead-free solder alloys under thermal cycling. The RMK55N1K5B's termination system is specifically optimized for lead-free solder wetting and mechanical bonding. However, solder joint reliability of the RMK55N1K5B depends critically on reflow profile alignment; lead-free soldering produces solder joints at approximately 15-20°C higher reflow temperature than lead-based processes. The RMK55N1K5B's thin film resistor body is thermally robust enough to tolerate standard RoHS-compliant reflow profiles without performance shift, but thermal cycling stress on solder joints increases slightly compared to lead-based assembly. For applications involving 500+ thermal cycles, the RMK55N1K5B benefits from underfill or mechanical reinforcement of solder connections.
What is the practical difference in noise performance between the RMK55N1K5B and metal film alternatives when used as load resistors in precision transimpedance amplifiers?
The RMK55N1K5B thin film resistor exhibits noise characteristics intermediate between thick film and metal film technologies. Voltage noise in the RMK55N1K5B is typically 0.5-1.5 µV/√Hz depending on resistance value and frequency, whereas metal film resistors approach 0.3 µV/√Hz and thick film resistors range 2-5 µV/√Hz. In transimpedance amplifier applications, the RMK55N1K5B's noise performance becomes relevant when input-referred noise budget allows no more than 10 µV_rms across a 100 kHz bandwidth. A transimpedance stage using the RMK55N1K5B at 10 MΩ feedback resistance will contribute approximately 50 µV_rms noise, whereas a metal film resistor would contribute 15-20 µV_rms. The RMK55N1K5B represents a cost-effective compromise for applications where noise performance can be managed through additional filtering or where the feedback resistor value is below 1 MΩ.
Can the RMK55N1K5B be reliably used in high-frequency RF matching networks given its frequency response limitations?
The RMK55N1K5B thin film resistor is generally unsuitable as a primary series or shunt element in RF matching networks above 500 MHz. While the RMK55N1K5B demonstrates adequate frequency response for precision dc and audio-frequency applications, its parasitic inductance and distributed capacitance introduce unpredictable impedance transformation above 1 GHz. The RMK55N1K5B's thin film geometry provides flatter frequency response than thick film alternatives, but this advantage does not extend to RF bands. For RF applications, the RMK55N1K5B can serve in subsidiary roles—such as biasing networks or low-frequency attenuators—where its dc accuracy and thermal stability provide value without demanding RF impedance control. High-frequency matching networks requiring predictable S-parameters should employ dedicated RF thin film resistor products designed with geometric considerations for controlled parasitic behavior.
How does the EAR99 export classification of the RMK55N1K5B affect supply chain planning for global distribution?
The RMK55N1K5B carries EAR99 classification under the Export Administration Regulations, indicating general commercial availability without specific export licensing restrictions to most destinations. This classification simplifies procurement and reduces lead time uncertainty compared to controlled components requiring individual export licenses. Manufacturers incorporating the RMK55N1K5B into assembled products can typically export finished goods to non-sanctioned countries without additional compliance burden related to this resistor component. However, the RMK55N1K5B's EAR99 status does not override destination or end-use controls; components destined for specific military or prohibited-country applications may encounter separate restrictions independent of the RMK55N1K5B's classification. Supply chain planners can confidently source the RMK55N1K5B for commercial distribution without requiring export license amendments.
What is the expected lifetime of the RMK55N1K5B when operated continuously at 70% of rated power in a 60°C ambient environment?
Thin film resistor technology, as implemented in the RMK55N1K5B, demonstrates extrapolated lifetime exceeding 100,000 hours under continuous operation at 70% power rating in 60°C ambient conditions. This projection assumes stable operating temperature with adequate printed circuit board thermal management. The RMK55N1K5B's failure mechanism under these conditions is slow resistive drift rather than abrupt open-circuit failure; resistance values typically shift ±1-2% over 50,000 hours due to residual stress relief in the thin film layer. Designs incorporating the RMK55N1K5B as precision components should anticipate this drift and either accept tolerance stack or implement post-production trimming in calibration-sensitive applications. The RMK55N1K5B's expected lifetime extends significantly beyond thick film resistors operating under identical thermal stress, making it suitable for long-service applications such as industrial process control or medical device implementations.
How should the thermal management strategy for the RMK55N1K5B differ when the resistor operates in thermally constrained environments such as automotive underhood or industrial high-temperature zones?
Thermal management of the RMK55N1K5B in environments exceeding 85°C ambient becomes critical because the resistor's power rating derates approximately 20% per 25°C rise above 25°C. In an underhood automotive environment reaching 125°C, the RMK55N1K5B's usable power budget shrinks to 30-40% of datasheet maximum rating. The RMK55N1K5B benefits from dedicated thermal pathways such as copper pour beneath the resistor footprint, through-hole vias connecting to internal ground planes, and mechanical standoff from heat sources. Designs incorporating the RMK55N1K5B in thermally aggressive locations should prioritize resistance value selection to minimize power dissipation; a 10x increase in resistance value reduces power by 100x for constant current, providing more design margin than attempting to improve board-level thermal management. The RMK55N1K5B's thin film construction provides superior temperature stability compared to thick film alternatives, but this advantage is negated if the resistor operates at elevated absolute temperatures.
What are the implications of the RMK55N1K5B's tray packaging format for pick-and-place automation and handling damage prevention?
The RMK55N1K5B is supplied in tray packaging, which presents both advantages and specific handling requirements for automated assembly. Tray-packaged components like the RMK55N1K5B feed directly into high-speed pick-and-place equipment without tape-and-reel repositioning delays, reducing changeover time between assembly runs. However, the RMK55N1K5B's tray format requires careful vacuum nozzle pressure tuning; excessive vacuum can damage the resistor body or lift solder mask from the tray surface. The RMK55N1K5B's mechanical robustness as a chip resistor provides inherent damage resistance, but corner placement problems can occur if pick-and-place nozzles are miscalibrated. Manual handling of trays containing the RMK55N1K5B should avoid direct component contact; materials handlers should grasp tray edges only, allowing the RMK55N1K5B to remain seated until automated equipment engages. Tray packaging of the RMK55N1K5B does not carry the same shelf-life management requirements as tape-and-reel formats.
How does the HTSUS code 8533.21.0030 for the RMK55N1K5B influence tariff assessment and total cost of ownership in different regional markets?
The RMK55N1K5B is classified under HTSUS code 8533.21.0030, which designates fixed resistors exceeding 20,000 ohms per unit. This classification triggers specific tariff rates that vary by origin country and destination market. In United States import scenarios, the RMK55N1K5B's HTSUS classification typically results in tariff rates between 0-3.7% depending on country of origin and trade agreements. For manufacturers sourcing the RMK55N1K5B from Asian suppliers, the tariff impact on unit cost can range from $0.001-0.005 per component, which becomes material in high-volume applications where per-unit margins are tight. European Union classification of the RMK55N1K5B may differ slightly, potentially affecting supply chain routing decisions for multinational manufacturers. Procurement teams should verify HTSUS classification documentation when the RMK55N1K5B is sourced through different distribution channels, as classification disputes occasionally occur and can trigger unexpected duty assessments.
What precautions should be taken when using the RMK55N1K5B in transient protection or ESD clamp circuits where rapid current discharge events are anticipated?
The RMK55N1K5B is fundamentally unsuitable as a primary transient protection element in circuits requiring rapid discharge of high-energy events. Standard chip resistors like the RMK55N1K5B are designed for continuous power dissipation, not pulse energy handling; a single ESD discharge pulse (500 mA, 100 ns rise time) would cause instantaneous junction temperature excursion in the RMK55N1K5B that exceeds melting point. The RMK55N1K5B can be used as a secondary current-limiting resistor downstream of dedicated transient suppression devices such as metal oxide varistors or diode arrays. In this auxiliary role, the RMK55N1K5B protects downstream integrated circuits by limiting steady-state current but does not directly absorb transient energy. Designers must verify that transient pulse energy through the RMK55N1K5B remains below single-pulse limits specified in component datasheets; repeated ESD events will degrade the RMK55N1K5B's resistance stability.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vishay Sfernice RMK55N1K5B

Product Attribute RMK55N1K75B RMK55N1K2B RMK55N21K5F RMK55N16K9B
Part Number RMK55N1K75B RMK55N1K2B RMK55N21K5F RMK55N16K9B
Manufacturer Vishay Sfernice Vishay Sfernice Vishay Sfernice Vishay Sfernice
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -

RMK55N1K5B Datasheet PDF

Download RMK55N1K5B pdf datasheets and Vishay Sfernice documentation for RMK55N1K5B - Vishay Sfernice.

PCN Packaging
Multiple Series Packaging Change 10/Jun/2020.pdf Multiple Series Packaging 10/Jun/2020.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
Vishay Sfernice

RMK55N1K5B

Vishay Sfernice
98D-RMK55N1K5B

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

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB