RK73B1HTTC910J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC910J is a 91 Ohm ±5% thick film chip resistor rated at 0.05W (1/20W) in 0201 package form factor (0.60mm x 0.30mm). Manufactured by KOA Speer Electronics, Inc., this component is designed for automotive applications with AEC-Q200 qualification. The part carries a "Not For New Designs" status, indicating it has been superseded in the product lifecycle. Identifying equivalent and substitute parts is necessary for ongoing support of existing designs, inventory management, and sourcing flexibility across multiple manufacturers.

Substiute Parts

RK73B1HTTC910J

KOA Speer Electronics, Inc.In Stock: 1082RK73B1HTTC910J Datasheet

Current PartRFQ

RK73B1HTTCM910J

KOA Speer Electronics, Inc.In Stock: 1136RK73B1HTTCM910J Datasheet

MFR RecommendedRFQ

AC0201JR-0791RL

YAGEOIn Stock: 826AC0201JR-0791RL Datasheet

DirectRFQ

CRCW020191R0JNED

Vishay DaleIn Stock: 902CRCW020191R0JNED Datasheet

DirectRFQ

ERJ-1GNJ910C

Panasonic Electronic ComponentsIn Stock: 35169ERJ-1GNJ910C Datasheet

DirectRFQ

CRCW020191R0FKED

Vishay DaleIn Stock: 966CRCW020191R0FKED Datasheet

UpgradeRFQ

CRCW020191R0FNED

Vishay DaleIn Stock: 26276CRCW020191R0FNED Datasheet

UpgradeRFQ

ERJ-1GEF91R0C

Panasonic Electronic ComponentsIn Stock: 251595ERJ-1GEF91R0C Datasheet

UpgradeRFQ

ERJ-1GNF91R0C

Panasonic Electronic ComponentsIn Stock: 34555ERJ-1GNF91R0C Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC910J is determined by strict equivalence across the following critical parameters:

Direct Equivalence Criteria (Same Tolerance ±5%):

• Resistance value: 91 Ohms
• Power rating: 0.05W (1/20W)
• Package: 0201 (0603 Metric)
• Tolerance: ±5%
• Composition: Thick Film
• Temperature Coefficient: ±200ppm/°C
• Operating Temperature: -55°C ~ 155°C minimum
• RoHS3 Compliance
• MSL 1 rating

Upgrade Criteria (Enhanced Tolerance ±1%):

• All parameters identical to direct equivalence
• Tolerance upgraded to ±1% (tighter specification)
• Temperature Coefficient may vary (±100ppm/°C or ±200ppm/°C acceptable)
• Operating Temperature: -55°C ~ 155°C minimum

Packaging Variants:

• Cut Tape (CT) and Bulk packaging are interchangeable with Tape & Reel (TR) for electrical performance
• Packaging selection depends on assembly process requirements, not electrical function

Parts are grouped by substitution type: MFR Recommended (same manufacturer, different packaging), Direct Manufacturer (equivalent from alternative suppliers), and Upgrade (enhanced tolerance specifications).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Specifications):

RK73B1HTTCM910J is the primary recommended substitute. Manufactured by the same supplier (KOA Speer Electronics, Inc.), this part maintains identical electrical specifications (91 Ohms ±5%, 0.05W, ±200ppm/°C, -55°C ~ 155°C) and carries Active product status. The only difference is packaging format (Bulk versus Cut Tape), which does not affect electrical performance. This part is suitable for designs requiring continuity with the original specification.

AC0201JR-0791RL (YAGEO) provides an alternative direct equivalent with Active status and AEC-Q200 automotive qualification. Electrical parameters are identical to the original part. This option offers supply diversification from a different manufacturer.

For Designs Accepting Tighter Tolerance:

CRCW020191R0FNED (Vishay Dale) is an upgrade option with ±1% tolerance instead of ±5%, maintaining all other parameters including -55°C ~ 155°C operating range and ±200ppm/°C temperature coefficient. This part is suitable when improved accuracy is beneficial and the design can accommodate the tighter specification. High inventory availability (26,253 pcs) supports production requirements.

CRCW020191R0FKED (Vishay Dale) offers ±1% tolerance with ±100ppm/°C temperature coefficient and -55°C ~ 155°C operating range. This represents the highest specification upgrade available.

Avoid for New Designs:

ERJ-1GEF91R0C (Panasonic) carries Obsolete product status and should not be selected for new applications despite high inventory levels.

Operating Temperature Consideration:

ERJ-1GNJ910C and ERJ-1GNF91R0C (Panasonic) specify -55°C ~ 125°C operating range, which is narrower than the original -55°C ~ 155°C. These parts are suitable only for applications not requiring the full 155°C upper temperature limit.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM910J directly replace RK73B1HTTC910J?

A: Yes. Both parts are manufactured by KOA Speer Electronics, Inc. with identical electrical specifications: 91 Ohms ±5%, 0.05W power rating, ±200ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The difference is packaging format (Bulk versus Cut Tape), which does not affect electrical performance or compatibility. RK73B1HTTCM910J carries Active product status.

Q: What is the difference between ±5% and ±1% tolerance parts?

A: Tolerance specifies the allowable deviation from the nominal 91 Ohm resistance value. ±5% tolerance allows resistance between 86.45 and 95.55 Ohms. ±1% tolerance allows resistance between 90.09 and 91.91 Ohms. The ±1% parts (CRCW020191R0FNED, CRCW020191R0FKED, ERJ-1GNF91R0C, ERJ-1GEF91R0C) provide tighter accuracy and are suitable for applications requiring improved precision. They are electrically compatible with ±5% designs but offer enhanced performance.

Q: Are Tape & Reel and Cut Tape packages interchangeable?

A: Tape & Reel (TR) and Cut Tape (CT) packaging formats contain identical components with different presentation for assembly processes. Tape & Reel is used for automated pick-and-place assembly, while Cut Tape is used for manual or semi-automated assembly. Electrical performance is identical. Selection depends on manufacturing process requirements, not component function.

Q: Why does the original part have "Not For New Designs" status?

A: This status indicates the RK73B1HTTC910J has been superseded in the manufacturer's product lifecycle. KOA Speer Electronics recommends using RK73B1HTTCM910J for new designs. However, the original part remains available for supporting existing products and legacy applications.

Q: Can I use ERJ-1GNJ910C if my application requires -55°C to 155°C operation?

A: No. ERJ-1GNJ910C specifies -55°C ~ 125°C operating range, which does not cover the full 155°C upper limit. Use this part only for applications with maximum operating temperature of 125°C or below. For full -55°C ~ 155°C range, select RK73B1HTTCM910J, AC0201JR-0791RL, CRCW020191R0FNED, or CRCW020191R0FKED.

Q: Which substitute offers the best specification upgrade?

A: CRCW020191R0FKED provides the most enhanced specification with ±1% tolerance and ±100ppm/°C temperature coefficient (compared to ±200ppm/°C in the original). This part maintains -55°C ~ 155°C operating range. CRCW020191R0FNED offers ±1% tolerance with ±200ppm/°C temperature coefficient as an alternative upgrade option.

Q: Is AEC-Q200 automotive qualification required for my application?

A: AEC-Q200 qualification is required only for automotive applications subject to automotive industry standards. RK73B1HTTC910J and RK73B1HTTCM910J carry AEC-Q200 qualification. AC0201JR-0791RL also includes AEC-Q200 qualification. The Vishay Dale (CRCW series) and Panasonic (ERJ series) parts listed do not carry AEC-Q200 qualification. For automotive applications, select from the AEC-Q200 qualified options.

Q: What is the inventory status for each substitute?

A: RK73B1HTTCM910J: 1,037 pcs. AC0201JR-0791RL: 754 pcs. CRCW020191R0JNED: 888 pcs. ERJ-1GNJ910C: 35,110 pcs. CRCW020191R0FKED: 875 pcs. CRCW020191R0FNED: 26,253 pcs. ERJ-1GEF91R0C: 251,569 pcs (Obsolete status). ERJ-1GNF91R0C: 34,493 pcs. Inventory levels support production requirements across all active alternatives.