B554-2T SCR Module Equivalent & Substitute Parts

Part Overview

The B554-2T is a thyristor module manufactured by Sensata Technologies, classified as a 1-Phase Controller SCR module with integrated diodes for chassis mount applications. This component is rated for 1.2 kV off-state voltage and 250A non-repetitive surge current at 60Hz, designed for 480VAC switching applications with .250" quick-connect terminals.

The B554-2T is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement, repair, and new design implementations where this module specification remains applicable.

Substiute Parts

B554-2T

Sensata TechnologiesIn Stock: 771B554-2T Datasheet

Current PartRFQ

B554-2

Sensata-CrydomIn Stock: 1184B554-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B554-2T is determined by equivalence across the following critical parameters:

• Voltage Rating (Off State): 1.2 kV minimum
• Current Capacity (Itsm): 250A @ 60Hz minimum
• Gate Trigger Specifications: Vgt ≤ 2.5 V, Igt ≤ 60 mA
• SCR Configuration: 2 SCRs with integrated diodes
• Mounting Interface: Chassis mount with .250" quick-connect terminals
• Temperature Range: -40°C to 125°C junction temperature
• Regulatory Compliance: RoHS compliant status

The B554-2 (Sensata-Crydom) qualifies as a direct substitute based on matching all electrical parameters, maintaining identical voltage and current ratings, gate trigger specifications, and operating temperature range. The primary distinction is the addition of isolation barriers in the B554-2 package design and its active product status.

Parameter Comparison

Engineering Selection Recommendations

The B554-2 (Sensata-Crydom) is the manufacturer-recommended substitute for the obsolete B554-2T. Both components maintain identical electrical specifications across all critical parameters: 1.2 kV off-state voltage, 250A surge current capacity, and matching gate trigger thresholds.

The B554-2 offers the advantage of active product status, ensuring continued manufacturing support and availability. The addition of isolation barriers in the B554-2 design provides enhanced electrical isolation, which is compatible with the original B554-2T application requirements.

Both parts maintain RoHS compliance and identical operating temperature ranges (-40°C to 125°C junction temperature), supporting direct substitution in existing designs and new implementations requiring this thyristor module specification.

Frequently Asked Questions (FAQ)

Q: Can the B554-2 directly replace the B554-2T in existing applications?

A: Yes. The B554-2 is the manufacturer-recommended substitute. All electrical parameters—voltage rating, current capacity, gate trigger specifications, and operating temperature range—are identical. The isolation barriers in the B554-2 design are compatible with B554-2T applications.

Q: What is the primary difference between the B554-2T and B554-2?

A: The B554-2T is obsolete, while the B554-2 is an active product. The B554-2 includes isolation barriers in its module design. All electrical specifications remain equivalent.

Q: Are there any packaging or terminal differences?

A: Both components use chassis mount configuration with .250" quick-connect terminals. The B554-2 is packaged as a module with isolation barriers, while the B554-2T is a standard module. Terminal compatibility is maintained.

Q: What compliance certifications apply to both parts?

A: Both the B554-2T and B554-2 are RoHS compliant and carry ECCN EAR99 classification with HTSUS code 8541.30.0080.

Q: Is the B554-2 suitable for -40°C to 125°C operating environments?

A: Yes. The B554-2 maintains the same operating temperature range as the B554-2T: -40°C to 125°C junction temperature.