SSC3S921 Equivalent & Substitute Parts

Part Overview

The SSC3S921 is an AC/DC converter integrated circuit manufactured by Sanken Electric USA Inc., classified as a Power Management (PMIC) component. This offline half-bridge topology controller operates across a switching frequency range of 31.5kHz to 300kHz and is designed for isolated power conversion applications. The device is currently in active production status with robust fault protection features including current limiting, overload, over-temperature, over-voltage, and UVLO (Under-Voltage Lock-Out) protection. Substitute parts are identified to provide design flexibility when the primary part number becomes unavailable or when alternative packaging configurations are required for specific manufacturing processes.

Substiute Parts

SSC3S921

Sanken Electric USA Inc.In Stock: 16503SSC3S921 Datasheet

Current PartRFQ

SSC3S921

Sanken Electric USA Inc.In Stock: 16503SSC3S921 Datasheet

Parametric EquivalentRFQ

SSC3S927L

Sanken Electric USA Inc.In Stock: 1132SSC3S927L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSC3S921 is determined by strict parametric matching across critical electrical and mechanical specifications. The following parameters establish the substitution criteria:

Electrical Parameters (Must Match):

• Topology: Half-Bridge
• Output Isolation: Isolated
• Voltage - Breakdown: 600V
• Voltage - Supply (Vcc/Vdd): 8.9V ~ 35V
• Voltage - Start Up: 17V
• Frequency - Switching: 31.5kHz ~ 300kHz
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, UVLO
• Control Features: Soft Start
• Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters (Must Match):

• Package / Case: 18-SOIC (0.213", 5.40mm Width), 16 Leads
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation:

• Packaging configuration: Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR)
• Inventory levels and supplier availability

Parts meeting all electrical, mechanical, and compliance criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both the SSC3S921 and SSC3S927L are active production parts manufactured by Sanken Electric USA Inc. and maintain full ROHS3 compliance with MSL 1 (Unlimited) moisture sensitivity rating. The parts are electrically and mechanically identical across all critical parameters including topology, voltage specifications, switching frequency range, fault protection features, and thermal operating range.

The primary distinction between these parts is the packaging configuration. The SSC3S921 is supplied in Cut Tape (CT) & Digi-Reel® format, while the SSC3S927L is supplied in Tape & Reel (TR) format. Selection between these parts should be based on manufacturing process requirements and assembly equipment compatibility. Both parts are suitable for surface mount assembly in 18-SOIC packages with identical pinout and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can SSC3S927L be used as a direct replacement for SSC3S921?

A: Yes. The SSC3S927L is a parametric equivalent to the SSC3S921. Both parts share identical electrical specifications, including topology, voltage ratings, switching frequency range, fault protection features, and operating temperature range. The parts are housed in the same 18-SOIC package with identical pinout and lead configuration. The only difference is the packaging format (Cut Tape & Digi-Reel® versus Tape & Reel).

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Cut Tape (CT) & Digi-Reel® packaging supplies components on cut tape that can be used with manual or semi-automatic assembly processes, while Tape & Reel (TR) packaging supplies components on continuous reel format optimized for high-speed automated assembly equipment. Both formats contain the same component in the same package; the difference is in the delivery and handling format for manufacturing processes.

Q: Are there any electrical performance differences between SSC3S921 and SSC3S927L?

A: No. Both parts operate identically across all specified electrical parameters. They share the same voltage ratings (600V breakdown, 8.9V to 35V supply), switching frequency range (31.5kHz to 300kHz), fault protection features (current limiting, overload, over-temperature, over-voltage, UVLO), and control features (soft start). Operating temperature range is identical at -40°C to 85°C.

Q: Which part should I select for my application?

A: Selection should be based on your manufacturing process requirements. If your assembly line uses automated high-speed pick-and-place equipment, the SSC3S927L in Tape & Reel format is appropriate. If your process uses manual or semi-automatic assembly, the SSC3S921 in Cut Tape & Digi-Reel® format may be more suitable. Both parts are electrically and mechanically interchangeable.

Q: Are both parts RoHS compliant?

A: Yes. Both the SSC3S921 and SSC3S927L are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, indicating no moisture sensitivity restrictions for storage and handling.

Q: What is the pin configuration for these parts?

A: Both parts use an 18-SOIC package with 16 leads. The package dimensions are 0.213" width with 5.40mm overall width. Pin configuration and pinout are identical between the two parts.