F1857HD600 Equivalent & Substitute Parts

Part Overview

The F1857HD600 is an SCR/Diode chassis mount module manufactured by Sensata-Crydom, designed for 600V applications with series connection architecture. This component integrates one SCR and one diode in a single module package, suitable for high-voltage switching applications requiring 55A operation at 240VAC.

The F1857HD600 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for repair, replacement, and new design implementations where this topology is required.

Substiute Parts

F1857HD600

Sensata-CrydomIn Stock: 865F1857HD600 Datasheet

Current PartRFQ

VS-VSKH56/06

Vishay General Semiconductor - Diodes DivisionIn Stock: 916VS-VSKH56/06 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F1857HD600 is determined by the following critical parameters that must remain consistent:

• Voltage Rating (Off State): 600V minimum
• Structure: Series Connection - SCR/Diode configuration
• Component Count: 1 SCR and 1 Diode per module
• Gate Trigger Parameters: Vgt ≤ 3V and Igt ≤ 150mA
• Mounting Configuration: Chassis Mount
• Operating Temperature Range: -40°C to 125°C (TJ)
• Surge Current Capability: Itsm ≥ 1200A

The VS-VSKH56/06 manufactured by Vishay General Semiconductor - Diodes Division meets these substitution criteria. Both parts maintain identical voltage ratings, series connection architecture, component structure, gate trigger specifications, mounting type, and operating temperature range. The substitute part is classified as active product status with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The VS-VSKH56/06 is a qualified substitute for the obsolete F1857HD600 based on the following engineering criteria:

Product Status: The VS-VSKH56/06 maintains active product status with Vishay, ensuring continued availability and manufacturing support. The F1857HD600 obsolescence necessitates transition to an active equivalent.

Compliance & Certifications: Both parts maintain RoHS compliance. The VS-VSKH56/06 carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications.

Electrical Compatibility: The substitute part maintains all critical electrical parameters within acceptable ranges. Gate trigger voltage is lower (2.5V vs. 3V maximum), which is compatible with existing gate drive circuits. Surge current capability is slightly lower (1200A/1256A vs. 1500A), which remains adequate for the specified 55A continuous operation at 240VAC.

Mechanical & Thermal Compatibility: Identical chassis mount configuration and operating temperature range (-40°C to 125°C) ensure direct mechanical and thermal compatibility in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the VS-VSKH56/06 directly replace the F1857HD600 in existing designs?

A: Yes. Both parts maintain identical series connection architecture, voltage ratings, component structure, gate trigger current specifications, mounting type, and operating temperature range. The substitute part is electrically and mechanically compatible for direct replacement.

Q: What is the difference in gate trigger voltage between these parts?

A: The F1857HD600 specifies a maximum gate trigger voltage (Vgt) of 3V, while the VS-VSKH56/06 specifies 2.5V maximum. The lower specification of the substitute part is compatible with existing gate drive circuits designed for the original part, as it represents a tighter tolerance rather than a functional limitation.

Q: Are there differences in surge current capability?

A: The F1857HD600 is rated for 1500A non-repetitive surge current at 60Hz, while the VS-VSKH56/06 is rated for 1200A and 1256A. Both ratings exceed the continuous operating requirement of 55A at 240VAC. The substitute part remains suitable for the intended application.

Q: What is the difference in package designation?

A: The F1857HD600 uses a generic Module package designation, while the VS-VSKH56/06 uses ADD-A-PAK (3 + 4) designation. Both are chassis mount configurations with identical mechanical mounting interfaces and pin configurations for series connection SCR/Diode modules.

Q: Are both parts RoHS compliant?

A: Yes. The F1857HD600 is RoHS Compliant, and the VS-VSKH56/06 is ROHS3 Compliant. Both meet current environmental and regulatory requirements.

Q: Why is the F1857HD600 classified as obsolete?

A: Obsolescence indicates that Sensata-Crydom has discontinued manufacturing and support for this part number. The VS-VSKH56/06 remains in active production, ensuring long-term availability and technical support for new designs and replacements.