IPS521S Equivalent & Substitute Parts

Part Overview

The IPS521S is an N-Channel power switch/driver manufactured by Infineon Technologies, designed for high-side switching applications in power management circuits. This component operates as a 1:1 switch with a maximum output current of 1.9A and an on-resistance of 55mOhm typical. The IPS521S is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

IPS521S

Infineon TechnologiesIn Stock: 18008IPS521S Datasheet

Current PartRFQ

BTS441RGATMA1

Infineon TechnologiesIn Stock: 7487BTS441RGATMA1 Datasheet

MFR RecommendedRFQ

VN920DB5TR-E

STMicroelectronicsIn Stock: 8448VN920DB5TR-E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IPS521S are selected based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Core Compatibility Requirements:

• Output Configuration: High Side
• Output Type: N-Channel
• Ratio - Input:Output: 1:1
• Interface: On/Off (Non-Inverting)
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Mounting Type: Surface Mount
• Package Compatibility: TO-263-5 or equivalent footprint

Performance Parameters:

• Voltage - Load: Must encompass or exceed 5.5V ~ 35V range
• Current - Output (Max): Must meet or exceed 1.9A
• Rds On: Lower values are acceptable (improved performance)
• Fault Protection: Must include at minimum Current Limiting and Over Temperature protection

The identified substitute parts meet these criteria while offering enhanced electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

BTS441RGATMA1 (Infineon Technologies, PROFET® Series)

This substitute offers direct electrical compatibility with the IPS521S while providing significant performance improvements. The BTS441RGATMA1 maintains identical package footprint (TO-263-5), operating temperature range, and interface characteristics. Current capacity increases from 1.9A to 17A, with on-resistance reduced from 55mOhm to 15mOhm typical. The component is ROHS3 compliant and carries active product status, ensuring long-term availability. Additional fault protection includes Over Voltage detection. Moisture sensitivity remains at MSL 1 (Unlimited), matching the original part.

VN920DB5TR-E (STMicroelectronics, VIPOWER™ Series)

This substitute provides functional equivalence with enhanced electrical performance. The VN920DB5TR-E operates within the required voltage and temperature specifications, with maximum output current of 30A and on-resistance of 18mOhm (Max). The component is ROHS3 compliant with active product status. Package footprint differs (P2PAK versus D2PAK), requiring PCB layout modification. Moisture sensitivity is MSL 3 (168 Hours), requiring controlled storage conditions. Fault protection includes Over Voltage detection in addition to current limiting and thermal protection.

Both substitutes are suitable for applications where the IPS521S is no longer available. Selection between them depends on package compatibility requirements and moisture handling capabilities in the manufacturing environment.

Frequently Asked Questions (FAQ)

Q: Can the BTS441RGATMA1 directly replace the IPS521S without PCB modifications?

A: Yes. Both components use the TO-263-5 package footprint, enabling direct pin-compatible replacement. No PCB layout changes are required.

Q: Is the VN920DB5TR-E a pin-compatible replacement?

A: No. The VN920DB5TR-E uses P2PAK packaging while the IPS521S uses D2PAK (TO-263-5). PCB layout modification is necessary to accommodate the different package footprint.

Q: What are the key electrical differences between the IPS521S and its substitutes?

A: The BTS441RGATMA1 and VN920DB5TR-E both provide higher current capacity (17A and 30A respectively versus 1.9A) and lower on-resistance (15mOhm and 18mOhm versus 55mOhm). Both substitutes expand the load voltage range and include Over Voltage protection. These improvements maintain backward compatibility while enhancing circuit performance.

Q: Are there compliance differences between the original part and substitutes?

A: Yes. The IPS521S is RoHS non-compliant, while both BTS441RGATMA1 and VN920DB5TR-E are ROHS3 compliant. Both substitutes are REACH Unaffected. If RoHS compliance is required for new designs, either substitute is suitable.

Q: What is the moisture sensitivity difference between VN920DB5TR-E and the other parts?

A: The VN920DB5TR-E has MSL 3 (168 Hours), requiring storage in controlled humidity conditions and baking before reflow soldering. The IPS521S and BTS441RGATMA1 both have MSL 1 (Unlimited), allowing indefinite storage without moisture control measures.

Q: Do all three parts support the same fault protection features?

A: The IPS521S provides Current Limiting (Fixed), Open Load Detect, and Over Temperature protection. Both substitutes add Over Voltage protection to this feature set. All three components include the core protection mechanisms required for safe operation.

Q: What is the operating temperature range for all parts?

A: All three components operate across -40°C to 150°C (TJ), providing identical thermal performance specifications.