NKR141SC 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The NKR141SC is a single-character, 0.4-inch red 7-segment LED display module manufactured by Stanley Electric Co. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production, maintenance, and new design implementations. The NKR141SC features a common cathode configuration with a 10-DIP package format, designed for applications requiring compact numeric display capabilities with standard forward voltage and current characteristics.

Substiute Parts

NKR141SC

Stanley Electric CoIn Stock: 922NKR141SC Datasheet

Current PartRFQ

HDSP-F103

Broadcom LimitedIn Stock: 1681HDSP-F103 Datasheet

SimilarRFQ

LA-401VN

Rohm SemiconductorIn Stock: 1230LA-401VN Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NKR141SC is determined by the following mandatory parameters:

Primary Compatibility Criteria:

• Display Type: 7-Segment (required match)
• Number of Characters: 1 (required match)
• Common Pin Configuration: Common Cathode (required match)
• Package / Case: 10-DIP (0.300", 7.62mm) (required match)
• Digit/Alpha Size: 0.40" (10.16mm) (required match)

Secondary Compatibility Parameters:

• Color: Red (required match)
• Physical Dimensions: Must accommodate 0.512" H x 0.378" W x 0.276" D envelope or equivalent within manufacturing tolerance
• Voltage - Forward (Vf): Acceptable range 1.7V to 2.0V for standard circuit compatibility
• Current - Test: Acceptable range 5mA to 10mA for standard driver compatibility
• Power Dissipation (Max): Must not exceed 40mW

The identified substitute parts HDSP-F103 and LA-401VN meet all primary compatibility criteria and fall within acceptable secondary parameter ranges for direct substitution in applications originally designed for the NKR141SC.

Parameter Comparison

Engineering Selection Recommendations

HDSP-F103 (Broadcom Limited):

• Active product status ensures long-term availability and supply chain stability
• ROHS3 compliance and MSL 1 rating support modern manufacturing and environmental standards
• Identical forward voltage (1.7V) and package dimensions to NKR141SC enable direct circuit compatibility
• Reduced test current (5mA vs. 10mA) results in lower power consumption and reduced thermal load
• Lower millicandela rating (3.9mcd vs. 6.4mcd) and peak wavelength shift (645nm vs. 660nm) may require brightness assessment in light-sensitive applications
• Tube packaging supports automated assembly processes

LA-401VN (Rohm Semiconductor):

• Active product status ensures long-term availability and supply chain stability
• ROHS3 compliance and MSL 1 rating support modern manufacturing and environmental standards
• Identical physical dimensions and package configuration to NKR141SC enable direct mechanical compatibility
• Identical test current (10mA) maintains original circuit current characteristics
• Forward voltage increase (2.0V vs. 1.7V) requires circuit verification for voltage-sensitive applications
• Higher millicandela rating (16mcd vs. 6.4mcd) provides enhanced brightness for improved visibility
• Peak wavelength (650nm) remains within standard red LED spectrum
• Bulk packaging supports high-volume procurement

Frequently Asked Questions (FAQ)

Q: Can HDSP-F103 be used as a direct replacement for NKR141SC in existing circuit designs?

A: HDSP-F103 is mechanically and electrically compatible with NKR141SC for standard applications. The identical forward voltage (1.7V), package type (10-DIP), and physical dimensions enable direct substitution. However, the reduced test current (5mA vs. 10mA) and lower brightness (3.9mcd vs. 6.4mcd) require brightness verification in applications where display visibility is critical.

Q: What is the primary difference between HDSP-F103 and LA-401VN?

A: The primary differences are forward voltage and brightness. HDSP-F103 operates at 1.7V with 3.9mcd brightness and 5mA test current. LA-401VN operates at 2.0V with 16mcd brightness and 10mA test current. LA-401VN provides higher brightness but requires circuit adjustment for the increased forward voltage. HDSP-F103 maintains the original voltage characteristics of NKR141SC.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both HDSP-F103 and LA-401VN are ROHS3 compliant, meeting current environmental and regulatory requirements. The original NKR141SC does not specify RoHS status.

Q: What is the impact of the 0.3V forward voltage difference in LA-401VN?

A: The 0.3V increase (from 1.7V to 2.0V) in LA-401VN requires circuit verification. In series resistor-based driver circuits, this voltage increase will reduce current flow through the LED segment. Current-limiting circuits or driver ICs with adjustable output voltage may require recalibration to maintain consistent brightness and performance.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all three parts use identical 10-DIP (0.300", 7.62mm) package footprints. Physical PCB layout compatibility is confirmed. However, circuit schematic verification is required to ensure driver compatibility with the electrical characteristics of the selected substitute part.

Q: What is the wavelength difference between the three parts?

A: NKR141SC operates at 660nm peak wavelength (standard red). HDSP-F103 operates at 645nm (orange-red shift). LA-401VN operates at 650nm (standard red). These wavelength differences are within the red LED spectrum range and are not typically visible to the human eye in standard applications.

Q: Which substitute part is recommended for new designs?

A: Both HDSP-F103 and LA-401VN are active products suitable for new designs. HDSP-F103 is recommended for applications requiring minimal circuit modification due to identical forward voltage. LA-401VN is recommended for applications requiring enhanced brightness. Both parts meet current compliance standards (ROHS3, REACH Unaffected).

Q: What is the moisture sensitivity level (MSL) significance?

A: Both substitute parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. This simplifies supply chain management and reduces storage requirements compared to higher MSL ratings.