BYT30PI-400RG Equivalent & Substitute Parts

Part Overview

The BYT30PI-400RG is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 400 V DC reverse voltage and 30 A average rectified current in a DOP3I through-hole package. This component is classified as obsolete, making identification of suitable substitute parts necessary for ongoing design support and procurement continuity. The part operates across a junction temperature range of -40°C to 150°C and features fast recovery characteristics with a reverse recovery time of 100 ns.

Substiute Parts

BYT30PI-400RG

STMicroelectronicsIn Stock: 857BYT30PI-400RG Datasheet

Current PartRFQ

STTH30R04W

STMicroelectronicsIn Stock: 16273STTH30R04W Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BYT30PI-400RG is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
• Current - Average Rectified (Io): Must equal or exceed 30 A
• Reverse Recovery Time (trr): Must equal or be faster than 100 ns
• Speed Classification: Must maintain Fast Recovery characteristics

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole configuration required
• Package Type: Alternative through-hole packages acceptable if lead configuration and footprint support direct substitution

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Manufacturer: STMicroelectronics

The STTH30R04W meets all electrical and compliance requirements while offering improved performance characteristics and active product status. The primary difference is the package format transition from DOP3I to DO-247, both supporting through-hole mounting with straight leads.

Parameter Comparison

Engineering Selection Recommendations

The STTH30R04W is the qualified substitute for the BYT30PI-400RG based on the following engineering factors:

Electrical Equivalence: Both devices maintain identical voltage and current ratings at 400 V and 30 A respectively, with matching reverse recovery time of 100 ns. The STTH30R04W exhibits lower forward voltage (1.45 V versus 1.5 V) and significantly reduced reverse leakage current (15 µA versus 35 µA), resulting in improved thermal efficiency and reduced standby power dissipation.

Product Status and Availability: The BYT30PI-400RG is classified as obsolete, whereas the STTH30R04W maintains active product status with substantially higher inventory availability (16,179 pieces versus 817 pieces). This transition ensures long-term supply chain continuity and manufacturing support.

Compliance and Regulatory: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent regulatory requirements. The STTH30R04W supports an extended operating temperature range (-40°C to 175°C versus -40°C to 150°C), providing additional thermal margin for demanding applications.

Package Transition: The shift from DOP3I to DO-247 packaging represents a standard industry evolution for this device class. Both packages employ through-hole mounting with straight leads, supporting direct PCB footprint compatibility with appropriate mechanical verification.

Frequently Asked Questions (FAQ)

Q: Can the STTH30R04W directly replace the BYT30PI-400RG in existing designs?

A: Electrical substitution is valid based on matching voltage, current, and recovery time specifications. Mechanical compatibility requires verification of the DO-247 package footprint against the original DOP3I layout. Lead spacing and mounting hole alignment must be confirmed before implementation.

Q: What are the performance advantages of the STTH30R04W?

A: The substitute device provides lower forward voltage drop (1.45 V versus 1.5 V) and reduced reverse leakage current (15 µA versus 35 µA), resulting in decreased power dissipation and improved efficiency. The extended junction temperature rating (-40°C to 175°C) offers additional thermal operating margin.

Q: Why is the BYT30PI-400RG classified as obsolete?

A: Obsolescence reflects STMicroelectronics' product lifecycle management. The STTH30R04W represents the current-generation equivalent, offering improved performance and active manufacturing support.

Q: Are there any compliance differences between these devices?

A: Both components maintain identical RoHS3 and REACH compliance status. No regulatory or environmental differences exist between the devices.

Q: What is the primary difference between DOP3I and DO-247 packages?

A: Both are through-hole packages with straight leads. The DO-247 represents a more compact, industry-standard format. Physical dimensions and lead pitch differ; PCB layout verification is required for direct substitution.

Q: Is the STTH30R04W available in higher volumes?

A: Yes. The STTH30R04W maintains active product status with 16,179 pieces in stock compared to 817 pieces for the obsolete BYT30PI-400RG, ensuring reliable procurement for production quantities.

Q: Do these devices require different thermal management approaches?

A: The improved electrical characteristics of the STTH30R04W (lower forward voltage and leakage current) reduce thermal load. Existing thermal management solutions designed for the BYT30PI-400RG remain applicable, with potential for optimization based on the lower dissipation profile.