AS5145A-HSSM Rotary Encoder Magnetic 1024PPR Equivalent & Substitute Parts

Part Overview

The AS5145A-HSSM is a magnetic rotary encoder manufactured by ams-OSRAM USA INC. that provides 1024 pulses per revolution with quadrature (incremental) output. This surface mount device operates across dual voltage ranges (3V–3.6V and 4.5V–5.5V) and is qualified to AEC-Q100 automotive standards with RoHS compliance.

The AS5145A-HSSM is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this encoder.

Substiute Parts

AS5145A-HSSM

ams-OSRAM USA INC.In Stock: 865AS5145A-HSSM Datasheet

Current PartRFQ

AS5145A-HSST

ams-OSRAM USA INC.In Stock: 1067AS5145A-HSST Datasheet

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AS5145A-HSST-500

ams-OSRAM USA INC.In Stock: 767AS5145A-HSST-500 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AS5145A-HSSM are identified based on strict electrical and mechanical parameter matching within the AS5145 product family. The substitution logic is based on the following critical parameters:

Electrical Compatibility:

• Encoder type: Magnetic
• Output configuration: Quadrature (Incremental)
• Resolution: 1024 pulses per revolution
• Supply voltage ranges: 3V–3.6V and 4.5V–5.5V

Mechanical Compatibility:

• Mounting type: Surface Mount
• Termination style: SMD (SMT) Tab
• Actuator configuration: External Magnet, Not Included

Compliance & Qualification:

• Automotive grade classification
• AEC-Q100 qualification
• RoHS compliance

Parts meeting all these criteria are classified as direct substitutes. Variations in packaging format (bulk versus Tape & Reel) and moisture sensitivity level do not affect functional substitutability but may impact handling and storage requirements.

Parameter Comparison

Engineering Selection Recommendations

AS5145A-HSST is the primary substitute for AS5145A-HSSM. Both parts share identical electrical specifications, mechanical form factors, and automotive qualifications. The AS5145A-HSST maintains active product status, ensuring long-term availability and supply chain continuity. Moisture sensitivity level remains at MSL 3, matching the original part's handling requirements.

AS5145A-HSST-500 is an alternative substitute with identical functional and electrical characteristics. This variant is supplied in Tape & Reel packaging format and features improved moisture sensitivity (MSL 1, Unlimited), reducing moisture-related handling constraints during storage and assembly. Selection of AS5145A-HSST-500 is appropriate for high-volume production environments where automated tape-fed assembly processes are employed.

Both substitute parts carry AEC-Q100 qualification and RoHS compliance, meeting automotive-grade requirements equivalent to the obsolete AS5145A-HSSM.

Frequently Asked Questions (FAQ)

Q: Can AS5145A-HSST directly replace AS5145A-HSSM in existing designs?

A: Yes. Both parts are functionally identical across all critical parameters: magnetic encoder type, 1024 PPR quadrature output, dual voltage supply ranges (3V–3.6V and 4.5V–5.5V), surface mount configuration, and SMD Tab termination. No circuit modifications are required.

Q: What is the difference between AS5145A-HSST and AS5145A-HSST-500?

A: The primary difference is packaging format and moisture sensitivity. AS5145A-HSST is supplied in bulk packaging with MSL 3 (168 hours). AS5145A-HSST-500 is supplied in Tape & Reel format with MSL 1 (unlimited moisture exposure tolerance). Electrical and mechanical specifications are identical.

Q: Which substitute should be selected for high-volume production?

A: AS5145A-HSST-500 is recommended for high-volume automated assembly. Tape & Reel packaging enables direct integration with pick-and-place equipment, and MSL 1 rating eliminates moisture-related handling constraints.

Q: Are both substitutes qualified to the same automotive standards as the original part?

A: Yes. Both AS5145A-HSST and AS5145A-HSST-500 carry AEC-Q100 qualification and RoHS compliance, matching the automotive-grade requirements of AS5145A-HSSM.

Q: What external components are required for operation?

A: All three parts (AS5145A-HSSM, AS5145A-HSST, AS5145A-HSST-500) require an external magnet, which is not included. The magnet must be sourced separately and positioned according to the encoder's mechanical specifications.