SI-3033KD Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The SI-3033KD is a linear voltage regulator IC from Sanken Electric USA Inc. designed for positive fixed 3.3V output applications with 1A current capacity in a TO-263-5 surface mount package. This device is classified as Not For New Designs, indicating it has reached end-of-life status. The SI-3033KD-TL serves as the parametric equivalent and active substitute, offering identical electrical specifications while maintaining current production and availability status.

Substiute Parts

SI-3033KD

Sanken Electric USA Inc.In Stock: 993SI-3033KD Datasheet

Current PartRFQ

SI-3033KD-TL

Sanken Electric USA Inc.In Stock: 1162SI-3033KD-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SI-3033KD-TL is classified as a parametric equivalent substitute based on the following criteria:

Electrical Parameters Match:

• Output voltage: 3.3V (identical)
• Output current: 1A (identical)
• Input voltage maximum: 17V (identical)
• Voltage dropout: 0.6V @ 1A (identical)
• Quiescent current: 350 µA (identical)
• PSRR: 55dB (100Hz ~ 120Hz) (identical)
• Operating temperature range: -30°C ~ 125°C (identical)
• Protection features: Over Current, Over Temperature (identical)

Mechanical Parameters Match:

• Package type: TO-263-5 (identical)
• Mounting type: Surface Mount (identical)
• Supplier device package: TO-263-5 (identical)

Compliance Parameters Match:

• RoHS Status: RoHS Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)
• ECCN: EAR99 (identical)
• HTSUS: 8542.39.0001 (identical)

The primary distinction is product status: SI-3033KD is Not For New Designs, while SI-3033KD-TL is Active, making the latter the recommended choice for ongoing production and new applications.

Parameter Comparison

Engineering Selection Recommendations

The SI-3033KD-TL is the direct substitute for SI-3033KD applications. Selection between these parts is determined by product lifecycle requirements:

Use SI-3033KD-TL for:

• New product designs
• Production continuation of existing designs
• Applications requiring active component status
• Long-term supply chain stability

Use SI-3033KD only for:

• Legacy system maintenance where original part number is mandated
• Existing inventory utilization in non-critical applications

Both parts carry identical RoHS Compliance certification and MSL Rating 1 (Unlimited), ensuring equivalent environmental and handling requirements. The TO-263-5 package footprint is identical, allowing direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can SI-3033KD-TL be used as a direct replacement for SI-3033KD?

A: Yes. All electrical, mechanical, and compliance parameters are identical. Direct substitution is possible without circuit modification or PCB redesign.

Q: What is the difference between SI-3033KD and SI-3033KD-TL?

A: The primary difference is product status. SI-3033KD is Not For New Designs (end-of-life), while SI-3033KD-TL is Active. All technical specifications are identical.

Q: Are the packages physically compatible?

A: Yes. Both use TO-263-5 (D2PAK, 5 Leads + Tab) surface mount packaging with identical pin configuration and footprint.

Q: What are the key electrical parameters that define substitution eligibility?

A: Output voltage (3.3V), output current (1A), input voltage maximum (17V), voltage dropout (0.6V @ 1A), quiescent current (350 µA), and PSRR (55dB) must remain constant for substitution validity.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are RoHS Compliant with MSL Rating 1 (Unlimited), ECCN EAR99, and HTSUS 8542.39.0001.

Q: Which part should be specified for new designs?

A: SI-3033KD-TL should be specified for new designs due to its Active product status and ongoing manufacturer support.