SIM-012SBT87 Infrared Emitter - Equivalent & Substitute Parts

Part Overview

The SIM-012SBT87 is a 950nm infrared emitter manufactured by Rohm Semiconductor, designed for surface mount applications requiring side-view emission characteristics. This component operates at 1.2V forward voltage with a maximum forward current of 40mA and delivers 0.9mW/sr radiant intensity at 20mA with a 24° viewing angle. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production and maintenance applications.

Substiute Parts

SIM-012SBT87

Rohm SemiconductorIn Stock: 1252SIM-012SBT87 Datasheet

Current PartRFQ

XZTNI56W-1

SunLEDIn Stock: 6805XZTNI56W-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SIM-012SBT87 is determined by the following critical parameters:

• Wavelength compatibility: The substitute must operate within the near-infrared spectrum suitable for the application. The SIM-012SBT87 operates at 950nm; substitutes at 940nm fall within acceptable tolerance for most IR detection and transmission applications.
• Forward voltage (Vf): Must match or be compatible with existing circuit design. The SIM-012SBT87 operates at 1.2V typical; substitutes must maintain this voltage specification.
• Maximum forward current (If): The substitute must support the required current level. The SIM-012SBT87 is rated for 40mA maximum; substitutes rated at 50mA or higher maintain backward compatibility.
• Radiant intensity (Ie): The substitute must deliver sufficient optical output. The SIM-012SBT87 provides 0.9mW/sr @ 20mA; substitutes with equal or greater intensity ensure optical performance.
• Viewing angle: The substitute must provide equivalent or wider beam dispersion. The SIM-012SBT87 has a 24° viewing angle; substitutes with 30° or greater maintain or improve coverage.
• Mounting and package: Surface mount orientation and lead configuration must be compatible with PCB layout. Both parts use side-view orientation and surface mount technology.
• Operating temperature range: The substitute must support the required thermal environment. The SIM-012SBT87 operates from -30°C to 85°C; substitutes with equal or extended range ensure reliability.
• Compliance certifications: RoHS3 compliance and REACH unaffected status ensure regulatory compatibility.

Parameter Comparison

Engineering Selection Recommendations

The XZTNI56W-1 from SunLED qualifies as a functional substitute for the obsolete SIM-012SBT87 based on the following criteria:

• Regulatory compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and safety standards.
• Electrical compatibility: Forward voltage is identical at 1.2V, allowing direct circuit integration without modification. The XZTNI56W-1 supports higher maximum forward current (50mA vs. 40mA), providing design margin and backward compatibility.
• Optical performance: The XZTNI56W-1 delivers superior radiant intensity (1.2mW/sr vs. 0.9mW/sr @ 20mA) and a wider viewing angle (30° vs. 24°), enhancing optical coverage and signal strength.
• Thermal range: The XZTNI56W-1 extends the lower operating temperature limit to -40°C, providing improved performance in cold environments compared to the original -30°C specification.
• Product availability: The XZTNI56W-1 maintains active product status with substantial inventory availability, ensuring long-term supply continuity.
• Package consideration: The XZTNI56W-1 uses a 2-SMD package versus the original 4-SMD package. PCB layout verification is required to confirm footprint compatibility and mounting orientation alignment.

Frequently Asked Questions (FAQ)

Q: Can the XZTNI56W-1 directly replace the SIM-012SBT87 without circuit modification?

A: The XZTNI56W-1 is electrically compatible at the forward voltage level (1.2V). However, PCB layout verification is necessary due to package differences (2-SMD vs. 4-SMD). The higher maximum forward current rating (50mA vs. 40mA) and superior radiant intensity require confirmation that the application circuit can accommodate these enhanced specifications without adverse effects.

Q: What is the wavelength difference between 950nm and 940nm, and does it affect functionality?

A: The 10nm wavelength difference falls within the near-infrared spectrum and is typically acceptable for IR detection and transmission applications. However, system-level validation is required if the application includes wavelength-specific filtering, detector tuning, or optical alignment that depends on the original 950nm specification.

Q: Are the moisture sensitivity levels equivalent?

A: Both parts carry MSL 3 (168 Hours) classification, indicating identical moisture handling and storage requirements. No difference in moisture management procedures is necessary.

Q: Does the wider viewing angle (30° vs. 24°) create compatibility issues?

A: The wider viewing angle of the XZTNI56W-1 provides broader optical coverage. This is generally beneficial for applications requiring wider beam dispersion. However, applications with strict beam angle requirements or optical isolation constraints should verify that the increased angle does not introduce unwanted optical crosstalk or performance degradation.

Q: What is the significance of the "Right Angle" mounting designation for the XZTNI56W-1?

A: The "Right Angle" designation indicates the emitter orientation relative to the PCB surface. This must be verified against the original PCB layout and mechanical assembly requirements to ensure proper optical alignment and component clearance.