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SD1440-003L Equivalent & Substitute Parts Reference
Part Overview
The SD1440-003L is a phototransistor optical sensor manufactured by Honeywell Sensing and Productivity Solutions. This component features a top view coaxial metal can package design and operates across an extended temperature range of -55°C to 125°C. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Collector Emitter Breakdown (Max) | 30 | V |
| Current - Collector (Ic) (Max) | 3 | mA |
| Current - Dark (Id) (Max) | 100 | nA |
| Viewing Angle | 24 | ° |
| Power - Max | 75 | mW |
| Mounting Type | Through Hole | — |
| Orientation | Top View | — |
| Operating Temperature | -55°C ~ 125°C | TA |
| Package / Case | Coaxial, Metal Can | — |
| RoHS Status | RoHS Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the SD1440-003L is determined by electrical and mechanical compatibility across the following critical parameters:
Electrical Compatibility Criteria:
- Voltage - Collector Emitter Breakdown rating must equal or exceed 30 V
- Current - Collector (Ic) maximum must support 3 mA operation
- Current - Dark (Id) maximum must not exceed 100 nA
- Power dissipation capability must accommodate 75 mW
Mechanical Compatibility Criteria:
- Mounting type must be Through Hole
- Orientation must be Top View
- Package configuration must support coaxial or equivalent mechanical interface
Environmental Compliance:
- RoHS compliance status must be verified
- Moisture Sensitivity Level must be rated at MSL 1 or equivalent
The LTR-3208E from Lite-On Inc. satisfies these substitution criteria within the defined parameter boundaries.
Parameter Comparison
| Parameter | SD1440-003L (Honeywell) | LTR-3208E (Lite-On) | Compatibility |
|---|---|---|---|
| Voltage - Collector Emitter Breakdown (Max) | 30 V | 30 V | Equal |
| Current - Collector (Ic) (Max) | 3 mA | 3.12 mA | Compatible |
| Current - Dark (Id) (Max) | 100 nA | 100 nA | Equal |
| Viewing Angle | 24° | 20° | Narrower in substitute |
| Power - Max | 75 mW | 100 mW | Higher in substitute |
| Mounting Type | Through Hole | Through Hole | Equal |
| Orientation | Top View | Top View | Equal |
| Operating Temperature | -55°C ~ 125°C | -40°C ~ 85°C | Narrower in substitute |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | Both compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Equal |
Engineering Selection Recommendations
Primary Substitute: LTR-3208E
The LTR-3208E is an active product with current manufacturing status and established supply chain availability (39,084 units in stock). This component meets all critical electrical parameters for direct substitution of the obsolete SD1440-003L.
Compliance Status:
- Both components carry RoHS compliance certifications
- Both components are classified under identical HTSUS code 8541.49.7080
- Both components carry ECCN classification EAR99
Parameter Deviations: The LTR-3208E exhibits two parameter differences relative to the SD1440-003L:
-
Operating temperature range is reduced from -55°C ~ 125°C to -40°C ~ 85°C. Applications requiring operation below -40°C or above 85°C cannot use this substitute.
-
Viewing angle is narrower at 20° compared to 24°. Applications requiring the full 24° viewing angle must account for this optical characteristic difference.
Both deviations represent constraints rather than enhancements. Component selection must confirm that application requirements fall within the LTR-3208E operating boundaries.
Frequently Asked Questions (FAQ)
Q: Can the LTR-3208E directly replace the SD1440-003L in all applications?
A: The LTR-3208E is electrically compatible with the SD1440-003L for current and voltage specifications. However, two application constraints exist: the operating temperature range is narrower (-40°C to 85°C versus -55°C to 125°C), and the viewing angle is reduced (20° versus 24°). Substitution is valid only when application requirements fall within these boundaries.
Q: What is the significance of the wavelength specification listed for the LTR-3208E?
A: The LTR-3208E is specified for 940nm wavelength operation. The SD1440-003L does not include wavelength specification in the provided parameters. If wavelength-specific performance is required in the original application, compatibility must be independently verified.
Q: Are there mechanical differences between the coaxial metal can package and the radial package?
A: The SD1440-003L uses a coaxial metal can package, while the LTR-3208E uses a radial package. Both are through-hole mounted components with top view orientation. Physical board layout and mechanical mounting considerations may differ. PCB footprint verification is required before implementation.
Q: What is the inventory status for these components?
A: The SD1440-003L has 657 units in stock but is classified as obsolete. The LTR-3208E has 39,084 units in stock and is classified as active product. For new designs or ongoing production, the LTR-3208E represents the sustainable supply option.
Q: Are both components RoHS compliant?
A: Yes. The SD1440-003L is RoHS Compliant. The LTR-3208E is ROHS3 Compliant. Both meet RoHS environmental compliance requirements.
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