TMA56S-L Equivalent & Substitute Parts

Part Overview

The TMA56S-L is a standard TRIAC thyristor rated for 600V off-state voltage and 5A on-state current, manufactured by Sanken Electric USA Inc. in a TO-220-3 Full Pack configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations where this functionality is required.

Substiute Parts

TMA56S-L

Sanken Electric USA Inc.In Stock: 2296TMA56S-L Datasheet

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Q6006L5TP

Littelfuse Inc.In Stock: 1509Q6006L5TP Datasheet

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T435T-600FP

STMicroelectronicsIn Stock: 2214T435T-600FP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TMA56S-L is determined by the following critical parameters:

• Voltage Rating (Off State): Must be 600V or higher
• Current Rating (On State): Must meet or exceed 5A RMS
• Gate Trigger Voltage (Vgt): Must be compatible with existing gate drive circuits
• Gate Trigger Current (Igt): Must be within acceptable gate drive capability
• Operating Temperature Range: Must support -40°C to 125°C operation
• Mounting Type: Through Hole configuration required
• Package Compatibility: TO-220-3 or equivalent isolated tab variants acceptable
• Configuration: Single TRIAC only

The substitute parts Q6006L5TP and T435T-600FP meet these core substitution criteria while maintaining functional equivalence within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Q6006L5TP (Littelfuse Inc.): This substitute provides 6A on-state current capability, exceeding the TMA56S-L requirement of 5A. The higher gate trigger voltage (2.5V maximum) and gate trigger current (50mA maximum) require verification of gate drive circuit compatibility. The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. The TO-220-3 Isolated Tab package is mechanically compatible with standard TO-220 footprints.

T435T-600FP (STMicroelectronics): This substitute is classified as an Alternistor - Snubberless type TRIAC with 4A on-state current rating, which is below the TMA56S-L specification of 5A. The lower gate trigger voltage (1.3V maximum) provides improved gate drive compatibility. The part is in active production status with ROHS3 compliance. The TO-220-3 Full Pack configuration provides direct package compatibility with the original TMA56S-L.

For applications requiring exact current rating maintenance, Q6006L5TP is the preferred substitute. For applications with reduced current requirements or improved gate drive characteristics, T435T-600FP is suitable.

Frequently Asked Questions (FAQ)

Q: Can Q6006L5TP directly replace TMA56S-L in all applications?

A: Q6006L5TP meets the core voltage and current requirements with higher current capability (6A vs 5A). However, the gate trigger voltage is higher (2.5V vs 1.5V maximum), requiring verification that existing gate drive circuits can supply adequate gate current at this voltage level.

Q: Why is T435T-600FP listed as a substitute if its current rating is lower?

A: T435T-600FP is listed as a substitute for applications where the actual operating current is below 4A RMS. The lower gate trigger voltage (1.3V) provides superior gate drive compatibility. Applications requiring the full 5A rating should use Q6006L5TP instead.

Q: Are the TO-220-3 Full Pack and TO-220-3 Isolated Tab packages interchangeable?

A: Both packages use the same TO-220-3 pin configuration and are mechanically compatible with standard TO-220 PCB footprints. The isolated tab variant (Q6006L5TP) provides electrical isolation of the mounting tab, which may be beneficial in certain thermal management configurations.

Q: What is the impact of the Alternistor - Snubberless classification on T435T-600FP?

A: The Alternistor - Snubberless design reduces the need for external snubber circuits in AC switching applications. This is a functional enhancement that does not prevent substitution but may allow circuit simplification in new designs.

Q: Are both substitute parts RoHS compliant?

A: Yes. The original TMA56S-L is RoHS Compliant. Both substitute parts Q6006L5TP and T435T-600FP are ROHS3 Compliant, meeting current regulatory requirements.