RE-EF-5K4451X Resistor Model Number Guide

Quick answer

The RE-EF-5K4451X is a model number for a fixed resistor, typically used in industrial and electronic circuit applications. It likely features a 5kΩ resistance, ±1% tolerance, and is part of a precision resistor series. Always confirm specs from the manufacturer or datasheet before purchasing.

RE-EF-5K4451X Resistor Model: Everything You Need to Know

Resistors play a fundamental role in electronics, and finding the right one can make or break your project. If you’ve come across RE-EF-5K4451X, you’re likely searching for its specs, uses, or a datasheet. While this model number isn’t widely documented online, its structure aligns with known industrial resistor naming conventions.

This post breaks down the possible meaning of RE-EF-5K4451X, its potential specifications, applications, sourcing tips, and how to verify resistor models.

Read on to make sure you’re buying or using the right resistor for your system.

Key Facts Table

What Does the RE-EF-5K4451X Model Number Represent?

A Breakdown of the Code

Model numbers like RE-EF-5K4451X usually follow industry-specific naming schemes:

• RE-EF likely refers to the resistor series or family.
• 5K indicates the resistance value (5 kilo-ohms).
• 4451X may denote packaging, precision rating, or factory batch.

This is common in industrial resistor cataloging, similar to Vishay, Panasonic, or Yageo resistor series.

Manufacturer Identification

Currently, RE-EF-5K4451X doesn’t match a major brand’s public model listings. That suggests:

• It’s OEM-specific.
• It’s a legacy/discontinued part.
• It’s custom-ordered for a specific product or application.

In such cases, contact electronic component suppliers or consult reverse lookup databases like Octopart or FindChips.

Likely Technical Specifications

Without a confirmed datasheet, we reverse-engineer expected specs based on standard practices for similar model numbers.

Resistance and Tolerance

• Resistance: 5,000 ohms (5kΩ)
• Tolerance: ±1% (most common for labeled resistors with precision format)

Power Rating

Typical ratings for resistors in this format include:

• 1/4W to 1W depending on size and mounting type.
• If it’s RE-EF series, it may be flame-proof or military-grade.

Temperature and Stability

Expect:

• Operating temp range: -55°C to +155°C
• Temp coefficient: ±100 ppm/°C to ±250 ppm/°C

These values ensure stable resistance even under fluctuating environmental conditions.

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Use Cases of RE-EF-5K4451X

Resistors in this range are used widely in electronic design:

• Signal filtering
• Voltage dividers
• Biasing transistors
• Current limiting
• Pull-up/pull-down configurations

They are essential in:

• Consumer electronics
• Aerospace systems
• Medical devices
• Power supplies
• IoT sensors

How to Source RE-EF-5K4451X Resistor

1. Search Trusted Suppliers

Check vendors like:

• Mouser
• DigiKey
• Arrow

Use advanced search tools to filter by:

• Resistance (5kΩ)
• Tolerance (±1%)
• Package type
• Power rating

2. Check Distributors of Obsolete Parts

If it’s an old or niche model, search:

• Rutronik
• NexGen

3. Ask for Cross-References

Suppliers can provide equivalent part numbers from:

• Vishay
• KOA Speer
• Bourns
• TE Connectivity

Reading a Resistor Without a Datasheet

Step-by-Step

1. Visual inspection: Identify color bands.
2. Measure with multimeter: Verify resistance.
3. Compare dimensions: Estimate power rating.
4. Temperature test: Measure resistance change under load.

Conclusion

In short, RE-EF-5K4451X is a resistor with likely 5kΩ resistance, standard tolerance, and industrial application potential. While information is limited, it’s possible to find a working equivalent using specs.

FAQs