F1857HD1000 Equivalent & Substitute Parts

Part Overview

The F1857HD1000 is an SCR/Diode thyristor module manufactured by Sensata-Crydom, designed for high-voltage switching applications at 1 kV off-state voltage with 55A rated current capacity. This module features a series connection configuration with integrated SCR and diode elements, suitable for chassis mount installations in industrial power control systems.

The F1857HD1000 is classified as obsolete. Identifying equivalent 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

F1857HD1000

Sensata-CrydomIn Stock: 882F1857HD1000 Datasheet

Current PartRFQ

VS-VSKH71/10

Vishay General Semiconductor - Diodes DivisionIn Stock: 839VS-VSKH71/10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F1857HD1000 is determined by the following critical parameters that must remain consistent:

• Off-State Voltage: 1 kV (primary electrical rating)
• Structure: Series Connection - SCR/Diode configuration
• Component Count: 1 SCR, 1 Diode (functional topology)
• Gate Trigger Current (Igt): 150 mA maximum (control signal compatibility)
• Operating Temperature Range: -40°C ~ 125°C (thermal envelope)
• Mounting Type: Chassis Mount (mechanical interface)

The VS-VSKH71/10 meets all these critical substitution criteria. While the substitute part exhibits higher on-state current ratings (75A average, 165A RMS) and different surge current specifications, these represent enhanced performance characteristics within the same functional class and do not preclude substitution for applications within the F1857HD1000's original design envelope.

Parameter Comparison

Engineering Selection Recommendations

The VS-VSKH71/10 is the manufacturer-recommended substitute for the obsolete F1857HD1000. Selection of this substitute is supported by the following factors:

• Product Status: VS-VSKH71/10 maintains Active status, ensuring continued availability and supply chain reliability.
• Regulatory Compliance: VS-VSKH71/10 is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.
• Electrical Equivalence: All critical electrical parameters—off-state voltage, gate trigger specifications, and operating temperature range—are identical or superior to the original part.
• Functional Compatibility: Identical SCR/Diode series connection topology and chassis mount configuration ensure direct functional replacement.
• Inventory Availability: 733 pieces of VS-VSKH71/10 are in stock as new original components.

Frequently Asked Questions (FAQ)

Q: Can the VS-VSKH71/10 directly replace the F1857HD1000 in existing applications?

A: Yes. The VS-VSKH71/10 meets all critical substitution parameters: identical 1 kV off-state voltage, matching gate trigger current (150 mA), identical series SCR/Diode structure, and compatible operating temperature range (-40°C ~ 125°C). Chassis mount configuration and functional topology are identical.

Q: What is the difference in package format between these parts?

A: The F1857HD1000 uses a standard Module package, while the VS-VSKH71/10 uses ADD-A-PAK (3 + 4) format. Both are chassis mount configurations. Physical dimensions and mounting interface compatibility must be verified for the specific application.

Q: Are there differences in current ratings between these parts?

A: The VS-VSKH71/10 provides higher on-state current ratings (75A average, 165A RMS) compared to the F1857HD1000 (55A). This represents enhanced performance capability. Non-repetitive surge current (Itsm) is slightly lower in the substitute (1300A, 1360A vs. 1500A @ 60Hz), but remains within acceptable operating parameters for equivalent applications.

Q: What is the gate trigger voltage difference?

A: The VS-VSKH71/10 has a maximum gate trigger voltage (Vgt) of 2.5 V, compared to 3 V for the F1857HD1000. This lower threshold is compatible with control circuits designed for the original part and may provide improved gate sensitivity.

Q: Is the VS-VSKH71/10 compliant with current environmental standards?

A: Yes. The VS-VSKH71/10 is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements. The F1857HD1000 is RoHS Compliant but carries obsolete product status.