SLA7033M Equivalent & Substitute Parts

Part Overview

The SLA7033M is a unipolar stepper motor driver IC manufactured by Sanken Electric USA Inc., designed for general-purpose motor control applications. It integrates a fully functional control and power stage with Power MOSFET technology in an 18-ZIP package. The device operates across a supply voltage range of 10V to 44V and delivers 3A output current per channel.

The SLA7033M is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this driver architecture.

Substiute Parts

SLA7033M

Sanken Electric USA Inc.In Stock: 2109SLA7033M Datasheet

Current PartRFQ

SLA7026M

Sanken Electric USA Inc.In Stock: 9913SLA7026M Datasheet

SimilarRFQ

STA6940M

Sanken Electric USA Inc.In Stock: 1770STA6940M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SLA7033M is determined by the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 18-SSIP Formed Leads (18-ZIP)
• Mounting Type: Through Hole
• Output Configuration: Half Bridge (2)
• Interface: Parallel
• Technology: Power MOSFET
• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Application-Specific Criteria:

• Motor Type compatibility (Unipolar stepper or equivalent motor control capability)
• Output current rating (minimum 3A)
• Supply voltage range overlap with 10V ~ 44V
• Load voltage range overlap with 10V ~ 44V

Two substitute parts meet these criteria with varying degrees of compatibility:

SLA7026M provides direct functional equivalence as a unipolar stepper motor driver with identical electrical specifications and package format. Product status is Active, ensuring ongoing availability.

STA6940M operates within a different supply voltage range (3V ~ 5.5V) and is designed for brushed DC motor applications rather than unipolar stepper control. While it shares the same package, output configuration, and interface, its application domain and voltage specifications differ from the SLA7033M.

Parameter Comparison

Engineering Selection Recommendations

SLA7026M is the primary substitute for the SLA7033M. Both devices share identical electrical specifications, package format, and motor control application domain. The SLA7026M is classified as Active, ensuring component availability and supply chain continuity. RoHS compliance and MSL rating are equivalent. This part provides direct functional replacement without design modification.

STA6940M is a secondary option only for applications where supply voltage can be constrained to 3V ~ 5.5V and motor control requirements are compatible with brushed DC operation rather than unipolar stepper control. The higher output current rating (4A) does not offset the fundamental differences in application domain and supply voltage incompatibility with the original SLA7033M specification. This part is not recommended as a primary substitute.

Frequently Asked Questions (FAQ)

Q: Can the SLA7026M directly replace the SLA7033M without PCB modifications?

A: Yes. The SLA7026M is electrically and mechanically equivalent to the SLA7033M. Both devices use the 18-ZIP package with identical pinout, supply voltage range (10V ~ 44V), output current (3A), and unipolar stepper motor control functionality. No PCB layout changes are required.

Q: Why is the SLA7033M classified as obsolete if the SLA7026M is available?

A: Product status reflects manufacturing and distribution decisions by the original manufacturer. The SLA7026M represents the current production equivalent, while the SLA7033M has been discontinued. Designs using the SLA7033M should transition to the SLA7026M for long-term component availability.

Q: Is the STA6940M suitable for unipolar stepper motor applications?

A: No. The STA6940M is designed for brushed DC motor control and operates at supply voltages of 3V ~ 5.5V. The SLA7033M operates at 10V ~ 44V and is specifically designed for unipolar stepper motor applications. These are distinct application domains with incompatible control architectures.

Q: What is the significance of the 18-ZIP package designation?

A: The 18-ZIP package is a through-hole format with 18 pins in a dual in-line configuration. All three parts (SLA7033M, SLA7026M, and STA6940M) use this identical package, ensuring mechanical compatibility and PCB socket interchangeability.

Q: Are all three parts RoHS compliant?

A: Yes. The SLA7033M, SLA7026M, and STA6940M are all RoHS compliant with MSL rating of 1 (Unlimited), meeting environmental and regulatory requirements for industrial and commercial applications.

Q: What is the difference in operating temperature specification between the parts?

A: The SLA7033M and STA6940M specify operating temperature ranges of -20°C ~ 150°C (TJ). The SLA7026M does not provide an operating temperature specification in the available data. For applications requiring defined thermal performance, the SLA7033M or STA6940M specifications should be referenced.