STR4A164D Equivalent & Substitute Parts

Part Overview

The STR4A164D is an AC/DC converter integrated circuit manufactured by Sanken Electric USA Inc., designed for offline flyback topology applications. This Power Management (PMIC) component operates at 65kHz switching frequency and delivers 8.5W output power with isolated topology. The device is currently in Active product status with 767 pieces available in new original inventory. Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, lead time requirements, or design optimization needs while maintaining electrical and mechanical compatibility.

Substiute Parts

STR4A164D

Sanken Electric USA Inc.In Stock: 865STR4A164D Datasheet

Current PartRFQ

STR4A164D

Sanken Electric USA Inc.In Stock: 865STR4A164D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STR4A164D is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Topology: Flyback (offline converter architecture)
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 730V
• Voltage - Supply (Vcc/Vdd): 8.1V ~ 32V
• Voltage - Start Up: 15.2V
• Frequency - Switching: 65kHz
• Power (Watts): 8.5W
• Duty Cycle: 74%
• Internal Switch(s): Yes
• Fault Protection: Current Limiting, Over Load, Over Temperature, Over Voltage, UVLO
• Control Features: Soft Start

Mechanical Compatibility Requirements:

• Package / Case: 8-DIP (0.300", 7.62mm), 7 Leads
• Mounting Type: Through Hole

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Operating Temperature: -40°C ~ 125°C (TA)

A substitute part must match all electrical parameters, mechanical package specifications, and compliance certifications to ensure direct interchangeability without circuit redesign or board layout modification.

Parameter Comparison

Engineering Selection Recommendations

The STR4A164D maintains Active product status with confirmed inventory availability of 767 pieces in new original condition. The device carries ROHS3 compliance certification and MSL Level 1 rating, indicating full environmental and regulatory qualification for industrial and commercial applications.

When selecting between the main part and substitute options, both the STR4A164D main part and STR4A164D substitute demonstrate identical electrical specifications, mechanical packaging, and compliance certifications. Selection should be based on procurement lead time, inventory availability, and supply chain logistics rather than technical performance differentiation.

The 8-DIP through-hole package format ensures compatibility with standard PCB assembly processes and existing board layouts. The isolated flyback topology with integrated switching capability and comprehensive fault protection (current limiting, overload, over-temperature, over-voltage, and UVLO) provides robust operation across the -40°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: What makes the STR4A164D suitable for AC/DC converter applications?

A: The STR4A164D integrates a high-voltage switching element (730V breakdown rating) with offline flyback topology control, enabling direct AC mains rectification and isolated DC output generation at 8.5W power level with 65kHz switching frequency.

Q: Are there any differences between the main part and substitute part?

A: No. The STR4A164D main part and STR4A164D substitute are identical across all electrical parameters, mechanical specifications, and compliance certifications.

Q: What is the significance of the 8-DIP package format?

A: The 8-DIP (0.300", 7.62mm) through-hole package is a standard dual-in-line configuration compatible with conventional PCB drilling, wave soldering, and hand assembly processes. This package format ensures direct board-level compatibility without requiring layout modifications.

Q: Does the STR4A164D require external switching elements?

A: No. The STR4A164D incorporates an internal switching element, eliminating the need for external power transistors and reducing component count and board space requirements.

Q: What fault protection mechanisms are integrated into the STR4A164D?

A: The device includes current limiting, overload protection, over-temperature shutdown, over-voltage clamping, and UVLO (Under-Voltage Lock-Out) functions to protect against fault conditions and extend operational reliability.

Q: Is the STR4A164D compliant with environmental regulations?

A: Yes. The STR4A164D carries ROHS3 compliance certification and MSL Level 1 rating, confirming compliance with hazardous substance restrictions and moisture sensitivity requirements for industrial applications.

Q: What is the operating temperature range for the STR4A164D?

A: The device operates across -40°C to 125°C ambient temperature range, supporting applications in industrial, automotive, and wide-temperature-range environments.

Q: Can the STR4A164D be used in isolated power supply designs?

A: Yes. The isolated output topology and integrated high-voltage switching capability enable the STR4A164D for isolated AC/DC power supply applications requiring galvanic separation between input and output circuits.