RK73B2ATTD912J KOA Speer Resistor (Resistor Chip) In Stock

Name: RK73B2ATTD912J
Brand: KOA Speer
SKU: RK73B2ATTD912J
Availability: InStock

RK73B2ATTD912J is a KOA thick-film surface-mount resistor in an 0805 case with a 9.1 kΩ resistance value, ±5% tolerance, 0.25 W rated power, and ±200 ppm/°C temperature coefficient. It measures 2 mm x 0.5 mm and meets RoHS and REACH compliance requirements. Available in tape-and-reel packaging for automated PCB assembly with worldwide shipping.

ACTIVEResistorVerified Jun 2026

Package / Visual Reference

RK73B2ATTD912JResistor Chip

Quick Facts

Manufacturer: KOA Speer
Package: Resistor Chip
Pin Count: 2
Lifecycle: ACTIVE
Datasheet: RK73B2ATTD912J Datasheet PDF
Category: Resistor
Price: From $0.0069(MOQ 1)
Temp Range: -55.0°C to 155.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of RK73B2ATTD912J?

9.1 kΩ thick-film resistor in compact 0805 (2 mm x 0.5 mm) surface-mount package for high-density PCBs
0.25 W power rating with ±5% tolerance suitable for general-purpose signal conditioning and biasing
±200 ppm/°C temperature coefficient ensuring stable resistance across typical -55°C to +155°C operating ranges
RoHS and REACH compliant Pb-free construction for global regulatory compliance

What is RK73B2ATTD912J used for?

The RK73B2ATTD912J is a general-purpose thick-film chip resistor well-suited for pull-up/pull-down networks, voltage dividers, and current limiting in consumer electronics, industrial control PCBs, and IoT sensor modules. Its 0805 footprint and 0.25 W rating accommodate automated SMT assembly lines at high placement speeds. The ±200 ppm/°C drift makes it appropriate for non-precision biasing applications where temperature variation from -55°C to +155°C is expected.

What are the specifications of RK73B2ATTD912J?

Pbfree Code	Yes
Reach Compliance Code	Compliant
YTEOL	12
Construction	Rectangular
JESD-609 Code	e3
Mounting Feature	SURFACE MOUNT
Package Height	0.5mm
Package Length	2mm
Package Shape	RECTANGULAR PACKAGE
Package Style	SMT
Package Width	1.25mm
Packing Method	TR, Punched Paper, 7 Inch
Rated Power Dissipation (P)	0.25W
Rated Temperature	70°C
Reference Standard	AEC-Q200, IEC60115-8
Resistance	9100Ω
Resistor Type	FIXED RESISTOR
Size Code	0805
Surface Mount	YES
Technology	METAL GLAZE/THICK FILM
Temperature Coefficient	200ppm/°C
Terminal Finish	MATTE TIN OVER NICKEL
Terminal Shape	WRAPAROUND
Tolerance	5%
Working Voltage	150V
Package	Resistor Chip

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8533.21.00.30
Country of Origin	Japan, Mainland China, Malaysia

Where can I find the RK73B2ATTD912J datasheet?

RK73B2ATTD912J Datasheet Download

Official datasheet from KOA Speer

What are equivalent replacements for RK73B2ATTD912J?

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

Frequently Asked Questions

How does the ±200 ppm/°C temperature coefficient of the RK73B2ATTD912J affect resistance in a wide-temperature industrial design?

At ±200 ppm/°C, the RK73B2ATTD912J 9.1 kΩ resistor drifts by up to ±1.82 Ω per degree Celsius. Over a 100°C operating range from -40°C to +85°C, the total resistance shift can reach ±182 Ω, which is a 2% change on top of the ±5% initial tolerance. Designers should account for this in precision voltage divider or bias network calculations for industrial-grade circuits.

For a 3.3 V logic pull-up network, how much current does the RK73B2ATTD912J source when the line is pulled low?

With a 9.1 kΩ resistance and a 3.3 V pull-up supply, the RK73B2ATTD912J sources approximately 0.36 mA when the driven line is pulled to ground. Power dissipation in this state is about 1.2 mW, well within the 0.25 W (250 mW) rated limit, providing a large safety margin for standard I2C or GPIO pull-up applications.

When should an engineer select the 0805 package of the RK73B2ATTD912J over a smaller 0402 resistor for a PCB layout?

The 0805 package (2 mm x 1.25 mm) of the RK73B2ATTD912J is preferred over 0402 when manual rework or hand soldering is required, as its larger pad area and 0.5 mm height improve pick-and-place reliability at speeds below 30,000 CPH. It also handles 0.25 W power dissipation versus the typical 0.063 W of a 0402, making it suitable for resistors in higher-current bias paths of 5 mA or more.

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AvailabilityIn Stock

Reference Price (USD)

From $0.0069

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$0.0184	$0.02
250+	$0.0115	$2.88
273+	$0.0115	$3.14
500+	$0.0097	$4.84
1000+	$0.0080	$8.00
1740+	$0.0069	$12.01

pcs

Unit price: $0.0184 · Total: $0.02

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

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RK73B2ATTD912J KOA Speer Resistor (Resistor Chip) In Stock

What are the key features of RK73B2ATTD912J?

What is RK73B2ATTD912J used for?

What are the specifications of RK73B2ATTD912J?

Compliance & Regulatory

Where can I find the RK73B2ATTD912J datasheet?

What are equivalent replacements for RK73B2ATTD912J?

Frequently Asked Questions

How does the ±200 ppm/°C temperature coefficient of the RK73B2ATTD912J affect resistance in a wide-temperature industrial design?

For a 3.3 V logic pull-up network, how much current does the RK73B2ATTD912J source when the line is pulled low?

When should an engineer select the 0805 package of the RK73B2ATTD912J over a smaller 0402 resistor for a PCB layout?

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 KOA Speer

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