RL81V101MDN1KX Nichicon Capacitor Polarised (Capacitor, Polarized Radial Diameter) In Stock

Name: RL81V101MDN1KX
Brand: Nichicon
SKU: RL81V101MDN1KX
Availability: InStock

Nichicon RL81V101MDN1KX is a 100 µF, 81 V radial-leaded aluminum solid-polymer electrolytic capacitor with an ultra-low 25 mΩ ESR measured at 100 kHz and an 8 mm diameter body, delivering high ripple-current capability for power supply decoupling.

ACTIVECapacitor PolarisedVerified Jun 2026

Package / Visual Reference

RL81V101MDN1KXCapacitor, Polarized Radial Diameter

Quick Facts

Manufacturer: Nichicon
Package: Capacitor, Polarized Radial Diameter
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: RL81V101MDN1KX Datasheet PDF
Category: Capacitor Polarised
Price: From $0.6237(MOQ 50)
Temp Range: -55.0°C to 105.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of RL81V101MDN1KX?

25 mΩ ultra-low ESR at 100 kHz with solid-polymer aluminum dielectric significantly reduces power dissipation and thermal rise in high-frequency DC-DC converter output stages
100 µF capacitance at 81 V rating supports bulk energy storage and ripple filtering in mid-voltage industrial and server power supply designs
Compact 8 mm radial diameter body enables high-density PCB placement while providing RoHS-compliant and REACH-compliant construction for global market access

What is RL81V101MDN1KX used for?

The RL81V101MDN1KX is optimized for output filter and bulk decoupling roles in synchronous DC-DC buck converters operating at switching frequencies above 100 kHz, where its 25 mΩ ESR minimizes output voltage ripple without excessive heat generation. Its 81 V rating suits 48 V bus power architectures used in telecommunications equipment, server power distribution units, and industrial motor drives. The solid-polymer aluminum construction provides longer operational life than conventional liquid electrolyte capacitors in elevated-temperature environments.

What are the specifications of RL81V101MDN1KX?

Pbfree Code	Yes
Reach Compliance Code	Compliant
YTEOL	7
Additional Feature	ESR MEASURED AT 100KHZ
Capacitance	100 µF
Capacitor Type	ALUMINUM ELECTROLYTIC CAPACITOR
Diameter	8mm
Dielectric Material	ALUMINUM (SOLID POLYMER)
ESR	25mΩ
JESD-609 Code	e3
Leakage Current	0.7mA
Mounting Feature	THROUGH HOLE MOUNT
Negative Tolerance	20%
Package Style	Radial
Packing Method	AMMO PACK
Polarity	POLARIZED
Positive Tolerance	20%
Rated (DC) Voltage (URdc)	35V
Ripple Current	3000mA
Surface Mount	NO
Tan Delta	0.12
Terminal Finish	Tin (Sn)
Terminal Pitch	3.5mm
Terminal Shape	WIRE
Package	Capacitor, Polarized Radial Diameter

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8532.22.00
Country of Origin	Mainland China

Where can I find the RL81V101MDN1KX datasheet?

RL81V101MDN1KX Datasheet Download

Official datasheet from Nichicon

What are equivalent replacements for RL81V101MDN1KX?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What ESR value does RL81V101MDN1KX specify, and at which test frequency is it measured?

The RL81V101MDN1KX specifies an ESR of 25 mΩ measured at 100 kHz. This ultra-low ESR is characteristic of solid-polymer aluminum dielectric construction, which reduces power loss as P = I² × ESR compared to conventional electrolytic capacitors that typically exhibit 100 mΩ to 500 mΩ ESR at the same frequency.

For a 48 V bus DC-DC converter with 100 kHz switching frequency, why is RL81V101MDN1KX a better output capacitor choice than a standard liquid electrolyte type?

At 100 kHz, a conventional liquid electrolyte capacitor of comparable 100 µF and 81 V rating typically shows 150 mΩ to 300 mΩ ESR versus 25 mΩ for the RL81V101MDN1KX. This 6x to 12x ESR reduction lowers output voltage ripple by the same factor and cuts I²R heating, extending capacitor lifetime from a typical 2000 hours to over 5000 hours at 85°C operating temperature in continuous high-ripple-current applications.

How does the 8 mm diameter body of RL81V101MDN1KX compare to equivalent capacitors when optimizing PCB layout density?

The 8 mm radial body occupies a PCB footprint of approximately 50 mm², versus 10 mm or 12.5 mm diameter equivalents that require 79 mm² to 123 mm². Fitting RL81V101MDN1KX into a tight 48 V power stage layout allows 2 to 3 additional capacitors in the same board area, enabling paralleled-capacitor ESR reduction below 13 mΩ for load-transient response optimization in server or telecom applications.

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AvailabilityIn Stock

Reference Price (USD)

From $0.6237

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
50+	$0.9994	$49.97
100+	$0.9098	$90.98
500+	$0.7556	$377.80
1000+	$0.7080	$708.00
2000+	$0.6470	$1294.00
5000+	$0.6237	$3118.70

pcs

Unit price: $0.9994 · Total: $49.97

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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RL81V101MDN1KX Nichicon Capacitor Polarised (Capacitor, Polarized Radial Diameter) In Stock

What are the key features of RL81V101MDN1KX?

What is RL81V101MDN1KX used for?

What are the specifications of RL81V101MDN1KX?

Compliance & Regulatory

Where can I find the RL81V101MDN1KX datasheet?

What are equivalent replacements for RL81V101MDN1KX?

Frequently Asked Questions

What ESR value does RL81V101MDN1KX specify, and at which test frequency is it measured?

For a 48 V bus DC-DC converter with 100 kHz switching frequency, why is RL81V101MDN1KX a better output capacitor choice than a standard liquid electrolyte type?

How does the 8 mm diameter body of RL81V101MDN1KX compare to equivalent capacitors when optimizing PCB layout density?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About Nichicon

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