F18107SD1200 Equivalent & Substitute Parts

Part Overview

The F18107SD1200 is an SCR module manufactured by Sensata-Crydom, designed for high-current thyristor applications requiring 1.2 kV off-state voltage capability. This module features series-connected SCRs in a chassis-mount configuration, rated for 105 A operation at 480 VAC. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications where this component is specified.

Substiute Parts

F18107SD1200

Sensata-CrydomIn Stock: 881F18107SD1200 Datasheet

Current PartRFQ

CD431290B

Powerex Inc.In Stock: 1050CD431290B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the F18107SD1200 is determined by strict equivalence across the following critical parameters:

• Voltage - Off State: Must equal 1.2 kV
• Structure: Must be Series Connection - All SCRs
• Number of SCRs: Must be 2 SCRs
• Mounting Type: Must be Chassis Mount
• Voltage - Gate Trigger (Vgt) Max: Must not exceed 3 V
• Current - Gate Trigger (Igt) Max: Must not exceed 150 mA
• Operating Temperature Range: Must support -40°C to 125°C (TJ)

The CD431290B meets all substitution criteria as an active product with identical voltage ratings, SCR configuration, mounting type, and gate trigger specifications. This part maintains functional compatibility while offering improved availability and active product support status.

Parameter Comparison

Engineering Selection Recommendations

The CD431290B (Powerex Inc.) is the qualified substitute for the obsolete F18107SD1200. Selection is based on the following engineering criteria:

Voltage and Trigger Specifications: Both parts maintain identical 1.2 kV off-state voltage and 3 V / 150 mA gate trigger specifications, ensuring direct functional compatibility in gate drive circuits and voltage-clamped applications.

Configuration Equivalence: Both modules employ series-connected SCR architecture with two SCRs per module, maintaining identical electrical topology and thermal behavior in series-stacked applications.

Compliance Status: The CD431290B holds active product status with ROHS3 compliance, providing superior supply chain availability and regulatory alignment compared to the obsolete F18107SD1200. Both parts carry EAR99 ECCN classification and identical HTSUS codes.

Thermal Operating Range: Identical -40°C to 125°C junction temperature range ensures equivalent thermal performance across industrial and extended-temperature applications.

Non-Repetitive Surge Current: The CD431290B specifies 2000 A / 2100 A non-repetitive surge current versus 2250 A for the F18107SD1200. This represents a 7–11% reduction in surge capability. Applications requiring the full 2250 A surge rating must conduct detailed fault analysis to confirm CD431290B suitability.

Frequently Asked Questions (FAQ)

Q: Can the CD431290B directly replace the F18107SD1200 in existing designs?

A: Yes, for applications within the specified electrical parameters. Both parts share identical voltage ratings (1.2 kV), gate trigger specifications (3 V / 150 mA), SCR configuration (2 series SCRs), and operating temperature range (-40°C to 125°C). The CD431290B is qualified as a direct substitute. However, applications dependent on the full 2250 A non-repetitive surge rating require verification that the CD431290B's 2000–2100 A rating is acceptable.

Q: What is the difference between the F18107SD1200 and CD431290B package types?

A: The F18107SD1200 uses a standard Module package, while the CD431290B uses the POW-R-BLOK™ Module package. Both are chassis-mount configurations with equivalent mechanical and thermal interfaces. Physical dimensions and mounting hole patterns must be verified during integration to confirm mechanical compatibility.

Q: Why is the F18107SD1200 obsolete?

A: The F18107SD1200 is classified as obsolete by Sensata-Crydom. The CD431290B represents the active equivalent from Powerex Inc., offering continued product support, improved compliance certifications (ROHS3), and reliable supply chain availability.

Q: Are there any compliance differences between these parts?

A: Both parts are RoHS compliant. The F18107SD1200 carries RoHS Compliant status, while the CD431290B carries ROHS3 Compliant status, representing a more current regulatory standard. Both parts share identical EAR99 ECCN and HTSUS classifications.

Q: What is the moisture sensitivity level of the CD431290B?

A: The CD431290B carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. The F18107SD1200 lists MSL as Not Applicable. This difference does not affect substitution compatibility.