SST41Z-600B TRIAC Equivalent & Substitute Parts

Part Overview

The SST41Z-600B is a standard TRIAC thyristor rated for 600V off-state voltage and 40A on-state current, packaged in TO-3P insulated through-hole configuration. This component is designed for AC switching and power control applications requiring high voltage and current handling capability. The part is currently active in production with full RoHS3 and REACH compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It (RMS)) (Max)	40	A
Voltage - Gate Trigger (Vgt) (Max)	1.3	V
Current - Non Rep. Surge 50, 60Hz (Itsm)	400	A @ 50Hz
Current - Gate Trigger (Igt) (Max)	70	mA
Current - Hold (Ih) (Max)	80	mA
Operating Temperature Range	-40 to 125	°C (TJ)
Package / Case	TO-3P-3, SC-65-3	TO-3P Insulated
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

The SST41Z-600BW is identified as a parametric equivalent to the SST41Z-600B based on strict electrical and mechanical compatibility criteria. Substitution is valid when all of the following conditions are met:

Voltage - Off State: 600V (identical)
Current - On State (It (RMS)) (Max): 40A (identical)
Voltage - Gate Trigger (Vgt) (Max): 1.3V (identical)
Current - Non Rep. Surge 50, 60Hz (Itsm): 400A @ 50Hz (identical)
Current - Gate Trigger (Igt) (Max): 70mA (identical)
Current - Hold (Ih) (Max): 80mA (identical)
Operating Temperature Range: -40°C to 125°C (identical)
Package / Case: TO-3P-3, SC-65-3 (identical)
Mounting Type: Through Hole (identical)
Configuration: Single (identical)

Both parts share the same base product number (SST41) and are manufactured by SMC Diode Solutions. The substitute maintains full electrical and thermal performance specifications, enabling direct replacement in circuit designs.

Parameter Comparison

Parameter	SST41Z-600B	SST41Z-600BW	Match
Voltage - Off State	600 V	600 V	✓
Current - On State (It (RMS)) (Max)	40 A	40 A	✓
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	✓
Current - Non Rep. Surge 50, 60Hz (Itsm)	400A @ 50Hz	400A @ 50Hz	✓
Current - Gate Trigger (Igt) (Max)	70 mA	70 mA	✓
Current - Hold (Ih) (Max)	80 mA	80 mA	✓
Operating Temperature Range	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	✓
Package / Case	TO-3P-3, SC-65-3	TO-3P-3, SC-65-3	✓
Mounting Type	Through Hole	Through Hole	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
REACH Status	REACH Affected	REACH Affected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

Both SST41Z-600B and SST41Z-600BW are active production parts manufactured by SMC Diode Solutions with identical electrical specifications and mechanical packaging. Selection between these parts may be based on inventory availability and supply chain requirements. Both parts maintain full RoHS3 compliance and REACH regulatory status, ensuring compatibility with current environmental and safety standards. The TO-3P insulated through-hole package is suitable for applications requiring isolated gate control and robust thermal management through direct PCB mounting or heatsink attachment.

Frequently Asked Questions (FAQ)

Q: Can SST41Z-600BW be used as a direct replacement for SST41Z-600B?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including voltage ratings, current ratings, gate trigger characteristics, and thermal operating range. The TO-3P insulated package is identical, enabling direct PCB substitution without circuit modification.

Q: What determines whether a TRIAC can substitute for the SST41Z-600B?

A: A substitute TRIAC must match all critical parameters: 600V off-state voltage, 40A on-state current (RMS), 1.3V maximum gate trigger voltage, 70mA maximum gate trigger current, 80mA maximum hold current, and -40°C to 125°C operating temperature range. The package must be TO-3P-3 or SC-65-3 through-hole configuration.

Q: Are there any compliance differences between SST41Z-600B and SST41Z-600BW?

A: No. Both parts carry identical RoHS3 compliance and REACH regulatory status. Moisture sensitivity level (MSL) is 1 (Unlimited) for both parts, indicating no special moisture handling requirements during storage or assembly.

Q: What is the significance of the TO-3P insulated package for these TRIACs?

A: The TO-3P insulated package provides electrical isolation between the mounting surface and the semiconductor die, enabling safe mounting to conductive heatsinks without additional isolation hardware. This configuration is essential for applications requiring direct thermal coupling to chassis or heatsink structures while maintaining gate control isolation.

Q: Can these SST41Z-600B series TRIACs be used in both 50Hz and 60Hz applications?

A: Yes. The non-repetitive surge current rating of 400A is specified for both 50Hz and 60Hz operation, confirming suitability for AC power systems operating at either frequency.

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