Littelfuse Inc. 20LR450U
- Part No.:
- 20LR450U
- Manufacturer:
- Littelfuse Inc.
- Category:
- PTC Resettable Fuses
- Package:
- Strap
- Description:
- PTC RESET FUSE 20V 4.5A STRAP
- Quantity:
- Payment:

- Shipping:

Inventory:6,239
Please send an inquiry. Send us your inquiry, and we will respond immediately.
20LR450U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Littelfuse Inc.
- Package/Case:
- Strap
- Series:
- POLY-FUSE®, LR
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Polymeric
- Voltage - Max:
- 20V
- Current - Hold (Ih) (Max):
- 4.5 A
- Current - Trip (It):
- 8.9 A
- Current - Max:
- 100 A
- Time to Trip:
- 5 s
- Resistance - Initial (Ri) (Min):
- 11 mOhms
- Resistance - Post Trip (R1) (Max):
- 28 mOhms
- Resistance - 25°C (Typ):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Ratings:
- -
- Mounting Type:
- User Defined
- Size / Dimension:
- 0.984" L x 0.402" W (25.00mm x 10.20mm)
- Height - Seated (Max):
- -
- Thickness (Max):
- 0.039" (1.00mm)
- Lead Spacing:
- -
20LR450U FAQ
1.How can I place an order for 20LR450U through Aetrix?
Please submit a Request for Quotation (RFQ) for 20LR450U on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 20LR450U reliable?
The price and inventory of 20LR450U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 20LR450U is usually 5 days.
3.What payment methods are accepted for 20LR450U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 20LR450U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 20LR450U?
20LR450U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 20LR450U order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 20LR450U?
For technical support, including 20LR450U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 20LR450U requirements.
6.How does Aetrix verify that 20LR450U is sourced from the original manufacturer or authorized distributors?
All 20LR450U products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 20LR450U meets industry standards.
7.What is the process for return or replacement of 20LR450U?
All 20LR450U units undergo pre-shipment inspection (PSI). If there is an issue with 20LR450U, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 20LR450U part is unused and in its original packaging.
Return procedure for 20LR450U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
20LR450U Tags

-
PTS120660V010
Eaton - Electronics Division

-
MF-MSMF014-2
Bourns Inc.
-
MF-NSMF012-2
Bourns Inc.

-
MF-MSMF020-2
Bourns Inc.

-
PTS120660V005
Eaton - Electronics Division

-
0ZCJ0016FF2E
Bel Fuse Inc.

-
0ZCJ0020FF2E
Bel Fuse Inc.

-
0ZCH0010FF2E
Bel Fuse Inc.
,-Concave.jpg)
-
0ZCG0020AF2C
Bel Fuse Inc.

-
0ZCJ0005FF2E
Bel Fuse Inc.

-
0ZCJ0012FF2E
Bel Fuse Inc.

-
0ZCJ0010FF2E
Bel Fuse Inc.
Tech Hub
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
Machine vision system guide covering components, inspection workflow, camera and lens selection, FOV, pixel resolution, motion blur, strobe lighting, bandwidth, 2D/3D vision, integration, troubleshooti…
Electronic devices and circuits guide covering passive components, semiconductors, analog and digital circuits, circuit theory, practical calculations, troubleshooting, datasheet selection, and learnin…

