TF541S-A Equivalent & Substitute Parts

Part Overview

The TF541S-A is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 400V off-state voltage with 7.8A RMS current capacity in a TO-220-3 through-hole package. Manufactured by Sanken Electric USA Inc., this component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The part is RoHS compliant and suitable for applications requiring thyristor switching in the 400V range with sensitive gate triggering characteristics.

Substiute Parts

TF541S-A

Sanken Electric USA Inc.In Stock: 827TF541S-A Datasheet

Current PartRFQ

TS820-600FP

STMicroelectronicsIn Stock: 3203TS820-600FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TS820-600FP qualifies as a functional substitute for the TF541S-A based on the following substitution criteria:

Matching Parameters:

• SCR Type: Both are Sensitive Gate SCRs
• Gate Trigger Current (Igt): Both rated at 200 µA maximum
• Operating Temperature Range: Both operate from -40°C to 125°C
• Mounting Type: Both are through-hole mounted
• Package Family: Both use TO-220-3 full pack configuration
• RoHS Compliance: Both are RoHS compliant

Voltage Consideration: The TS820-600FP operates at 600V off-state voltage, which exceeds the TF541S-A requirement of 400V. This higher voltage rating provides margin and is acceptable for applications designed for 400V operation.

Current Consideration: The TS820-600FP is rated for 8A RMS current, which exceeds the TF541S-A rating of 7.8A RMS. This higher current capacity is compatible with existing designs.

Parameter Comparison

Engineering Selection Recommendations

The TS820-600FP is suitable as a direct substitute for the TF541S-A in new designs and production applications. The substitute part is currently in active production status with 3100 units available in inventory, compared to the obsolete TF541S-A with limited stock of 737 units.

Both parts maintain identical operating temperature ranges and gate trigger current specifications. The TS820-600FP provides higher voltage and current ratings, which are compatible with applications originally specified for the TF541S-A. Both parts carry RoHS compliance certifications appropriate for regulated manufacturing environments.

The TO-220-3 package compatibility ensures mechanical and thermal interface equivalence without requiring PCB redesign or thermal management modifications.

Frequently Asked Questions (FAQ)

Q: Can the TS820-600FP replace the TF541S-A in existing designs?

A: Yes. The TS820-600FP maintains the same gate trigger current specification (200 µA), operating temperature range (-40°C to 125°C), and TO-220-3 package configuration. The higher voltage and current ratings are compatible with applications designed for the TF541S-A.

Q: What is the primary difference between these two SCRs?

A: The TS820-600FP operates at 600V off-state voltage and 8A RMS current, while the TF541S-A is rated for 400V and 7.8A RMS. Both are Sensitive Gate SCRs with identical gate trigger current specifications and operating temperature ranges.

Q: Are there package compatibility concerns?

A: No. Both parts use the TO-220-3 full pack configuration with through-hole mounting. No PCB modifications are required for substitution.

Q: What is the availability status of each part?

A: The TF541S-A is obsolete with 737 units in stock. The TS820-600FP is in active production with 3100 units available, providing better long-term supply continuity.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. The TF541S-A is RoHS compliant, and the TS820-600FP is ROHS3 compliant, both meeting current regulatory standards for restricted substances.