FND310C 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The FND310C is a single-character, 7-segment LED display module manufactured by onsemi. It features a 0.36-inch red LED display with common anode configuration, designed for numeric and alphanumeric applications. The device operates at 2V forward voltage with 20mA test current and delivers 2.7mcd brightness output.

The FND310C is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this display module.

Key Parameters

Parameter	Value
Manufacturer Part Number	FND310C
Manufacturer	onsemi
Display Type	7-Segment LED
Number of Characters	1
Digit Size	0.36" (9.14mm)
Color	Red
Common Pin Configuration	Common Anode
Package Type	10-DIP (0.200", 5.08mm)
Voltage - Forward (Vf)	2V
Current - Test	20mA
Brightness Rating	2.7mcd
Wavelength - Peak	655nm
Power Dissipation (Max)	500mW
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the FND310C are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Display type: 7-Segment LED (single character)
Common pin configuration: Common Anode
Package type: 10-DIP (0.200", 5.08mm)
Color: Red
Test current: 20mA
Forward voltage: 2V nominal (acceptable range: 1.8V to 2V)

Secondary Compatibility Considerations:

Digit size: 0.36" preferred; 0.30" acceptable with design review
Brightness rating: Minimum 2.1mcd
Wavelength: 627nm to 655nm (red spectrum)
Power dissipation: Maximum 500mW

The two substitute parts listed below meet the primary compatibility criteria and maintain electrical and mechanical interchangeability with the FND310C within standard design tolerances.

Parameter Comparison

Parameter	FND310C (onsemi)	HDSP-A151 (Broadcom)	SA36-11EWA (Kingbright)
Display Type	7-Segment	7-Segment	7-Segment
Number of Characters	1	1	1
Digit Size	0.36" (9.14mm)	0.30" (7.62mm)	0.36" (9.14mm)
Common Pin Configuration	Common Anode	Common Anode	Common Anode
Color	Red	Red	Red
Voltage - Forward (Vf)	2V	1.8V	2V
Current - Test	20mA	20mA	20mA
Brightness Rating	2.7mcd	14mcd	2.1mcd
Wavelength - Peak	655nm	645nm	627nm
Power Dissipation (Max)	500mW	96mW	75mW
Package Type	10-DIP (0.200", 5.08mm)	10-DIP (0.200", 5.08mm)	10-DIP (0.200", 5.08mm)
Physical Dimensions (H x W x D)	0.560" x 0.310" x 0.315"	0.500" x 0.300" x 0.240"	0.551" x 0.295" x 0.335"
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

HDSP-A151 (Broadcom Limited) is classified as Active and RoHS3 Compliant. This part operates at 1.8V forward voltage, which is within acceptable tolerance for common anode 7-segment applications. The HDSP-A151 delivers higher brightness (14mcd) compared to the FND310C (2.7mcd) and exhibits lower power dissipation (96mW vs. 500mW). The primary design consideration is the reduced digit size (0.30" vs. 0.36"), which may require PCB layout verification for visual display applications. Pin configuration and package type are identical.

SA36-11EWA (Kingbright) is classified as Active and RoHS3 Compliant. This part maintains identical forward voltage (2V) and digit size (0.36") as the FND310C, providing direct mechanical and electrical compatibility. The SA36-11EWA delivers slightly lower brightness (2.1mcd vs. 2.7mcd) and reduced power dissipation (75mW vs. 500mW). Pin configuration and package type are identical.

Both substitute parts maintain common anode configuration, 10-DIP package format, 20mA test current, and red color specification. Selection between these substitutes depends on specific application requirements regarding digit size visibility and brightness performance.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-A151 be used as a direct replacement for the FND310C?

A: The HDSP-A151 is electrically compatible as a common anode 7-segment display with identical package type and pin configuration. The primary difference is digit size (0.30" vs. 0.36"). Applications requiring specific visual display dimensions must verify that the smaller digit size meets design requirements. Forward voltage (1.8V vs. 2V) is within acceptable tolerance for common anode circuits.

Q: Can the SA36-11EWA be used as a direct replacement for the FND310C?

A: Yes. The SA36-11EWA maintains identical digit size (0.36"), forward voltage (2V), common anode configuration, and 10-DIP package type. Pin configuration is identical. No design modifications are required for mechanical or electrical compatibility.

Q: What is the impact of different brightness ratings among these parts?

A: The FND310C (2.7mcd), SA36-11EWA (2.1mcd), and HDSP-A151 (14mcd) have different brightness outputs. Applications with specific visibility requirements in ambient lighting conditions must account for these differences. The HDSP-A151 provides significantly higher brightness; the SA36-11EWA provides comparable brightness to the FND310C.

Q: Are there pin configuration differences between these parts?

A: All three parts use 10-DIP (0.200", 5.08mm) package format with common anode configuration. Pin assignments are identical, enabling direct socket substitution without circuit modification.

Q: What compliance certifications apply to the substitute parts?

A: Both HDSP-A151 and SA36-11EWA are RoHS3 Compliant and REACH Unaffected. The FND310C is classified as REACH Unaffected. All three parts carry ECCN EAR99 and HTSUS 8541.41.0000 classification.

Q: How do forward voltage differences affect circuit design?

A: The FND310C and SA36-11EWA operate at 2V forward voltage. The HDSP-A151 operates at 1.8V. For common anode circuits, this 0.2V difference typically requires minimal adjustment to current-limiting resistor values. Existing designs using 2V specifications can accommodate the HDSP-A151 with standard resistor tolerance ranges.

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