AA1111C-TR Orange Diffused 0603 (1608 Metric) LED Equivalent & Substitute Parts

Part Overview

The AA1111C-TR is an orange diffused 0603 (1608 Metric) surface mount LED manufactured by Stanley Electric Co. This part is classified as obsolete and is no longer recommended for new designs. The device operates at a forward voltage of 2.2V with a test current of 20mA, producing an orange indication at 606nm dominant wavelength with a brightness rating of 3.4mcd. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for ongoing production support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	AA1111C-TR
Manufacturer	Stanley Electric Co
Product Status	Obsolete
Color	Orange
Lens Transparency	Diffused
Package / Case	0603 (1608 Metric)
Voltage - Forward (Vf) (Typ)	2.2V
Current - Test	20mA
Wavelength - Dominant	606nm
Millicandela Rating	3.4mcd
Viewing Angle	149°, 153°
Size / Dimension	1.60mm L x 0.80mm W
Height (Max)	0.80mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution of the AA1111C-TR is determined by the following critical parameters:

Primary Substitution Criteria:

Package / Case: 0603 (1608 Metric) surface mount form factor
Color: Orange LED indication
Lens Transparency: Diffused optical characteristic
Voltage - Forward (Vf): 2.2V nominal operation
Current - Test: 20mA standard test condition
Wavelength - Dominant: 606nm orange spectrum
Mounting Type: Surface Mount

Compatibility Parameters:

Lens Style: Rectangle with Flat Top
Lens Size: 1.10mm x 0.80mm
Viewing Angle: Minimum 140° for wide-angle applications
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Substitute parts must maintain electrical compatibility (forward voltage and test current), physical compatibility (0603 package dimensions and height), and optical compatibility (orange diffused lens). Parts with different colors, lens transparency, or significantly different brightness ratings are listed as similar but not direct substitutes.

Parameter Comparison

Parameter	AA1111C-TR (Main)	VFHA1111C-3BZ2C-TR (MFR Recommended)	5975203407F (Dialight)	HSMD-C191 (Broadcom)	HSMD-C197 (Broadcom)
Manufacturer	Stanley Electric Co	Stanley Electric Co	Dialight	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active
Color	Orange	Orange	Orange	Orange	Orange
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused
Package / Case	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)
Voltage - Forward (Vf) (Typ)	2.2V	1.9V	2.2V	2.2V	2.2V
Current - Test	20mA	20mA	20mA	20mA	20mA
Wavelength - Dominant	606nm	605nm	606nm	604nm	604nm
Millicandela Rating	3.4mcd	110mcd	2mcd	8mcd	8mcd
Viewing Angle	149°, 153°	140°	152°	170°	170°
Size / Dimension	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W
Height (Max)	0.80mm	0.80mm	0.70mm	0.60mm	0.40mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)	4 (72 Hours)	3 (168 Hours)	2A (4 Weeks)	2A (4 Weeks)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Recommendation: VFHA1111C-3BZ2C-TR

The VFHA1111C-3BZ2C-TR is the manufacturer-recommended substitute from Stanley Electric Co. This part maintains the same manufacturer lineage as the obsolete AA1111C-TR and is classified as Active product status. It shares identical package dimensions (0603/1608 Metric), lens characteristics (orange diffused), and test current (20mA). The forward voltage is 1.9V compared to the original 2.2V, which represents a 0.3V reduction and must be evaluated within the circuit design context. The brightness rating of 110mcd is significantly higher than the original 3.4mcd, providing enhanced visibility. RoHS3 compliance and REACH unaffected status are maintained. This part is suitable for direct replacement in new designs and ongoing production.

Secondary Recommendation: 5975203407F (Dialight)

The 5975203407F from Dialight is an active product offering identical electrical characteristics to the AA1111C-TR: 2.2V forward voltage, 20mA test current, and 606nm dominant wavelength. The package is 0603 (1608 Metric) with orange diffused lens. Height is 0.70mm compared to the original 0.80mm, which is acceptable for most PCB layouts. Brightness rating of 2mcd is closer to the original 3.4mcd than other alternatives. Viewing angle of 152° matches the original specification. MSL rating of 3 (168 Hours) is improved compared to the original MSL 4. This part is suitable for applications requiring electrical and optical characteristics closely aligned with the original design.

Tertiary Recommendation: HSMD-C191 or HSMD-C197 (Broadcom)

The HSMD-C191 and HSMD-C197 from Broadcom Limited are active products with 2.2V forward voltage and 20mA test current matching the original specification. Both parts feature 604nm dominant wavelength (within the orange spectrum), orange diffused lens, and 0603 package. HSMD-C191 has a height of 0.60mm and HSMD-C197 has a height of 0.40mm, both lower than the original 0.80mm. Brightness rating of 8mcd is higher than the original. Viewing angle of 170° provides wider optical coverage. MSL rating of 2A (4 Weeks) represents improved moisture sensitivity performance. These parts are suitable for space-constrained applications where reduced height is beneficial.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance with the original part.

Frequently Asked Questions (FAQ)

Q1: Can the VFHA1111C-3BZ2C-TR be used as a direct replacement for AA1111C-TR?

The VFHA1111C-3BZ2C-TR is the manufacturer-recommended substitute and shares the same manufacturer (Stanley Electric Co), package (0603/1608 Metric), color (orange), and lens transparency (diffused). The forward voltage differs by 0.3V (1.9V vs 2.2V), which must be evaluated within the specific circuit design. The brightness is significantly higher (110mcd vs 3.4mcd). Physical dimensions and mounting type are identical. This part is suitable for replacement in applications where the voltage and brightness differences are acceptable.

Q2: What are the key electrical parameters that determine substitutability?

The critical electrical parameters are: forward voltage (Vf), test current, and wavelength. The AA1111C-TR operates at 2.2V with 20mA test current at 606nm. Substitute parts must operate within compatible voltage ranges and maintain the same test current. Wavelength should remain within the orange spectrum (approximately 600-610nm). Parts with significantly different forward voltages require circuit redesign to maintain proper LED operation and brightness.

Q3: Are there any package height restrictions for substitution?

The original AA1111C-TR has a maximum height of 0.80mm. Substitute parts with lower heights (0.70mm, 0.60mm, or 0.40mm) are physically compatible with the same PCB footprint and will not cause assembly or clearance issues. Substitute parts with greater heights would require PCB layout verification. All recommended substitutes have heights equal to or less than the original specification.

Q4: How does the brightness difference affect circuit design?

The AA1111C-TR has a brightness rating of 3.4mcd. Substitute parts range from 2mcd (5975203407F) to 110mcd (VFHA1111C-3BZ2C-TR). Lower brightness (2mcd) may require circuit adjustments to increase LED current for adequate visibility. Higher brightness (8mcd or 110mcd) may require current limiting adjustments to prevent over-brightness or excessive power consumption. The circuit design must accommodate the selected substitute's brightness characteristics.

Q5: What is the significance of the MSL (Moisture Sensitivity Level) rating?

The original AA1111C-TR has MSL 4 (72 Hours), indicating the component must be used within 72 hours of package opening in standard humidity conditions. Substitute parts with lower MSL ratings (MSL 3 or MSL 2A) have longer shelf life and more relaxed moisture handling requirements. Lower MSL ratings provide manufacturing flexibility and reduced risk of moisture-induced failures during assembly.

Q6: Are all recommended substitutes RoHS3 compliant?

Yes, all recommended substitute parts (VFHA1111C-3BZ2C-TR, 5975203407F, HSMD-C191, and HSMD-C197) are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original AA1111C-TR. This ensures compatibility with environmental and regulatory requirements.

Q7: What is the difference between diffused and clear lens transparency?

The AA1111C-TR features a diffused lens, which scatters light over a wider viewing angle and provides a softer, more uniform appearance. Clear lens parts transmit light more directly with higher intensity in the forward direction. For direct substitution, diffused lens parts should be selected to maintain the original optical appearance and viewing characteristics.

Q8: Can parts with different viewing angles be substituted?

The AA1111C-TR has a viewing angle of 149° to 153°. Substitute parts with viewing angles of 140° to 170° are generally compatible, as the difference represents minor variations in optical cone width. Parts with significantly narrower viewing angles (less than 120°) may not provide adequate visibility in all directions. Parts with wider viewing angles (170°) provide enhanced visibility but may appear dimmer in the forward direction due to light distribution over a larger area.

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