CTRB6025 Equivalent & Substitute Parts

Part Overview

The CTRB6025 is a 3-phase solid state relay (SSR) manufactured by Sensata-Crydom, rated for 25A load current at 48–600V AC output with zero-cross switching. This relay operates on 90–140VAC input and features screw terminal connections suitable for chassis mount and DIN rail installations. The product is designated as Last Time Buy, indicating discontinued production. Equivalent and substitute parts are necessary to ensure continued availability and system continuity for applications requiring 3PST-NO (3 Form A) AC switching functionality.

Key Parameters

Parameter	CTRB6025
Manufacturer	Sensata-Crydom
Series	CTR
Circuit Configuration	3PST-NO (3 Form A)
Load Current Rating	25 A
Output Voltage Range	48–600V AC
Input Voltage Range	90–140VAC
Output Type	AC, Zero Cross
Mounting Type	Chassis Mount, DIN Rail
Termination Style	Screw Terminal
Package Type	Module
Product Status	Last Time Buy
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CTRB6025 is determined by the following critical parameters:

Circuit Configuration: Must be 3PST-NO (3 Form A) to maintain identical switching topology
Load Current Rating: Must be rated for minimum 25A continuous operation
Output Voltage Range: Must encompass or exceed the 48–600V AC specification
Output Type: Must support AC switching with zero-cross functionality
Termination Style: Must use screw terminals for direct connection compatibility
Mounting Compatibility: Must support DIN Rail and/or Chassis Mount installation

The two substitute parts listed below meet these criteria while offering extended input voltage ranges and active product status, providing improved long-term availability compared to the Last Time Buy CTRB6025.

Parameter Comparison

Parameter	CTRB6025	DR6760A25P	GNR25ACZH
Manufacturer	Sensata-Crydom	Sensata-Crydom	Crouzet
Circuit Configuration	3PST-NO (3 Form A)	3PST-NO (3 Form A)	3PST-NO (3 Form A)
Load Current Rating	25 A	25 A	25 A
Output Voltage Range	48–600V AC	48–600V AC	24–660V AC
Input Voltage Range	90–140VAC	90–280VAC/DC	24–255VAC/DC
Output Type	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross
Mounting Type	Chassis Mount, DIN Rail	Chassis Mount, DIN Rail	DIN Rail
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal
Package Type	Module	SSR with Integrated Heat Sink	Module
Product Status	Last Time Buy	Active	Active
RoHS Compliance	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

DR6760A25P is the primary substitute from Sensata-Crydom, maintaining manufacturer continuity. This part is Active status with extended input voltage capability (90–280VAC/DC) and includes an integrated heat sink, providing thermal management advantages. It meets all critical substitution parameters and is recommended for applications where Sensata-Crydom product line continuity is preferred.

GNR25ACZH is an alternative from Crouzet, also Active status. This part offers the widest input voltage range (24–255VAC/DC) and highest output voltage ceiling (24–660V AC), providing greater flexibility for variable supply conditions. It is ROHS3 compliant and suitable for applications requiring broader voltage tolerance. Note that mounting is limited to DIN Rail only, without chassis mount option.

Both substitutes are currently in active production with confirmed inventory availability, ensuring long-term supply security compared to the Last Time Buy CTRB6025.

Frequently Asked Questions (FAQ)

Q: Can DR6760A25P directly replace CTRB6025 in existing installations?

A: Yes. Both parts share identical circuit configuration (3PST-NO), load current rating (25A), output voltage range (48–600V AC), output type (AC, zero cross), and screw terminal termination. The DR6760A25P supports both chassis mount and DIN rail installation. The integrated heat sink on DR6760A25P provides additional thermal management without affecting electrical compatibility.

Q: What is the key difference between DR6760A25P and GNR25ACZH?

A: Both are functionally equivalent 3PST-NO 25A AC SSRs with zero-cross switching. The primary differences are: (1) DR6760A25P supports both chassis mount and DIN rail, while GNR25ACZH supports DIN rail only; (2) GNR25ACZH has wider input voltage range (24–255VAC/DC vs. 90–280VAC/DC) and higher output voltage ceiling (24–660V vs. 48–600V); (3) Manufacturer differs (Sensata-Crydom vs. Crouzet).

Q: Is GNR25ACZH suitable if the application requires chassis mount installation?

A: No. GNR25ACZH is specified for DIN rail mounting only and does not support chassis mount. For applications requiring chassis mount capability, DR6760A25P is the appropriate substitute.

Q: Are there input voltage compatibility concerns when substituting?

A: The CTRB6025 operates on 90–140VAC input. DR6760A25P accepts 90–280VAC/DC, which fully encompasses this range. GNR25ACZH accepts 24–255VAC/DC, which also encompasses the CTRB6025 range. Both substitutes are compatible with the original input voltage specification and support wider supply ranges.

Q: What is the significance of the integrated heat sink on DR6760A25P?

A: The integrated heat sink improves thermal dissipation during continuous 25A operation, reducing junction temperature and potentially extending component life. This is a functional enhancement that does not affect electrical substitution compatibility.

Q: Are both substitutes RoHS compliant?

A: GNR25ACZH is explicitly ROHS3 compliant, matching the CTRB6025. DR6760A25P RoHS status is not specified in available documentation. For applications with mandatory RoHS compliance requirements, GNR25ACZH provides explicit certification.

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