LDS-HTC512RI Equivalent & Substitute Parts

Part Overview

The LDS-HTC512RI is a green 7-segment LED display module manufactured by Lumex Opto/Components Inc. This single-character numeric display operates as a common cathode configuration with a 0.56" digit height and is housed in a 10-DIP package. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain disruptions, or when specific performance characteristics better align with application requirements while maintaining functional compatibility within the 7-segment display category.

Key Parameters

Parameter	LDS-HTC512RI
Display Type	7-Segment LED
Number of Characters	1
Color	Green
Common Pin Configuration	Common Cathode
Digit Height	0.56" (14.22mm)
Package Type	10-DIP
Forward Voltage (Vf)	2.2V
Test Current	10mA
Wavelength - Peak	565nm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LDS-HTC512RI are qualified based on the following criteria:

Primary Compatibility Requirements:

Display Type: 7-Segment LED (numeric/alphanumeric character display)
Common Pin Configuration: Common Cathode
Color: Green
Package Type: 10-DIP (dual in-line package)
Number of Characters: 1 (single character)

Secondary Electrical Parameters:

Forward Voltage (Vf): Range 1.9V to 2.2V
Test Current: 10mA to 20mA
Wavelength - Peak: 563nm to 572nm (green spectrum)

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected
Active production status

The three identified substitute parts (LA-601ML, LAP-601ML, and SC52-11GWA) satisfy all primary compatibility requirements and operate within acceptable electrical parameter ranges for common cathode 7-segment green LED display applications.

Parameter Comparison

Parameter	LDS-HTC512RI (Lumex)	LA-601ML (Rohm)	LAP-601ML (Rohm)	SC52-11GWA (Kingbright)
Display Type	7-Segment	7-Segment	7-Segment	7-Segment
Number of Characters	1	1	1	1
Color	Green	Green	Green	Green
Common Pin	Common Cathode	Common Cathode	Common Cathode	Common Cathode
Digit Height	0.56" (14.22mm)	0.58" (14.60mm)	0.57" (14.60mm)	0.52" (13.21mm)
Package Type	10-DIP (0.600", 15.24mm)	10-DIP (0.400", 10.16mm)	10-DIP (0.600", 15.24mm)	10-DIP (0.600", 15.24mm)
Forward Voltage (Vf)	2.2V	2.1V	1.9V	2.2V
Test Current	10mA	10mA	10mA	20mA
Millicandela Rating	3.5mcd	22mcd	100mcd	10.5mcd
Wavelength - Peak	565nm	563nm	572nm	565nm
Power Dissipation (Max)	105mW	60mW	448mW	62.5mW
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

LDS-HTC512RI (Primary Part) The LDS-HTC512RI remains the baseline reference for this substitution analysis. All substitute parts maintain common cathode configuration and 7-segment display architecture. This part carries ROHS3 compliance, unlimited moisture sensitivity rating, and active production status.

LA-601ML (Rohm Semiconductor) The LA-601ML is electrically compatible with a forward voltage of 2.1V and 10mA test current. The digit height of 0.58" represents a 3.6% increase over the primary part. The 10-DIP package pitch differs at 0.400" (10.16mm) versus the primary part's 0.600" (15.24mm), requiring PCB layout verification. This part carries ROHS3 compliance and unlimited moisture sensitivity rating. Selection is appropriate when standard DIP pitch compatibility is not a constraint.

LAP-601ML (Rohm Semiconductor) The LAP-601ML operates at a lower forward voltage of 1.9V with identical 10mA test current. The digit height of 0.57" is within 1.8% of the primary part. The 10-DIP package pitch matches the primary part at 0.600" (15.24mm), enabling direct PCB compatibility. This part carries ROHS3 compliance but has a moisture sensitivity level of 3 (168 hours), requiring controlled storage conditions. The 100mcd brightness rating is significantly higher than the primary part. Selection is appropriate for applications requiring higher brightness output and standard DIP pitch compatibility.

SC52-11GWA (Kingbright) The SC52-11GWA operates at 2.2V forward voltage matching the primary part, but requires 20mA test current (double the primary specification). The digit height of 0.52" represents a 7.1% reduction from the primary part. The 10-DIP package pitch matches the primary part at 0.600" (15.24mm). This part carries ROHS3 compliance and unlimited moisture sensitivity rating. Selection requires verification that the 20mA current requirement is accommodated by the circuit design.

All substitute parts maintain ROHS3 compliance and active production status, supporting long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the LA-601ML be used as a direct replacement for the LDS-HTC512RI?

A: The LA-601ML is electrically compatible as a common cathode 7-segment green LED display. However, the 10-DIP package pitch differs (0.400" versus 0.600"), requiring PCB layout modification. The digit height is also 3.6% larger. Electrical operation is compatible at 2.1V forward voltage and 10mA test current.

Q: What is the primary difference between the LAP-601ML and the LDS-HTC512RI?

A: The LAP-601ML operates at a lower forward voltage (1.9V versus 2.2V) and provides significantly higher brightness (100mcd versus 3.5mcd). The 10-DIP package pitch is identical (0.600", 15.24mm), enabling direct PCB compatibility. The moisture sensitivity level is higher (MSL 3 versus MSL 1), requiring controlled storage conditions.

Q: Is the SC52-11GWA compatible with the LDS-HTC512RI circuit design?

A: The SC52-11GWA is compatible as a common cathode 7-segment green LED display with matching 10-DIP package pitch (0.600", 15.24mm). The forward voltage matches at 2.2V. However, the test current requirement is 20mA versus 10mA for the primary part. Circuit current-limiting resistor values must be recalculated to accommodate the doubled current specification.

Q: What does MSL 3 (168 Hours) mean for the LAP-601ML?

A: Moisture Sensitivity Level 3 indicates the component must be stored in controlled humidity conditions and has a floor life of 168 hours after exposure to ambient conditions. This requires proper handling procedures including desiccant storage and baking before reflow soldering. MSL 1 (Unlimited) parts like the LDS-HTC512RI have no floor life restrictions.

Q: Can all substitute parts be used interchangeably on the same PCB?

A: No. The LA-601ML has a different 10-DIP package pitch (0.400" versus 0.600"), requiring PCB redesign. The SC52-11GWA requires doubled current (20mA), necessitating resistor recalculation. The LAP-601ML and LDS-HTC512RI share identical package pitch and can use the same PCB footprint, but resistor values should be verified for the lower forward voltage (1.9V versus 2.2V).

Q: Which substitute part has the highest brightness output?

A: The LAP-601ML provides 100mcd brightness, significantly higher than the LDS-HTC512RI (3.5mcd), LA-601ML (22mcd), and SC52-11GWA (10.5mcd). Selection of the LAP-601ML is appropriate for applications requiring enhanced visibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (LA-601ML, LAP-601ML, and SC52-11GWA) carry ROHS3 compliance certification, matching the primary part's compliance status.

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