S6006VS2 Equivalent & Substitute Parts

Part Overview

The S6006VS2 is a 600V, 6A sensitive gate SCR (silicon-controlled rectifier) manufactured by Littelfuse Inc. in a through-hole TO-251 (I-Pak/V-Pak) package. This thyristor is designed for applications requiring controlled rectification and switching at moderate current levels with sensitive gate triggering characteristics. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	S6006VS2
Voltage - Off State	600 V
Current - On State (It RMS)	6 A
Voltage - Gate Trigger (Vgt) Max	800 mV
Current - Gate Trigger (Igt) Max	200 µA
Voltage - On State (Vtm) Max	1.6 V
SCR Type	Sensitive Gate
Mounting Type	Through Hole
Package / Case	TO-251-3 (I-Pak/V-Pak)
Operating Temperature	-40°C ~ 110°C
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the S6006VS2 is determined by the following critical parameters:

Voltage Rating (Off State): All substitutes must maintain 600V blocking voltage capability
SCR Type: Sensitive gate operation is required to match the original triggering characteristics
Gate Trigger Parameters: Vgt (Max) 800 mV and Igt (Max) 200 µA define the gate sensitivity profile
On-State Voltage (Vtm): Maximum 1.6V ensures compatible voltage drop characteristics
Mounting Type & Package: Through-hole TO-251 (I-Pak) maintains PCB compatibility
Current Rating: RMS current capacity must meet or exceed 6A for the application

Substitutes are grouped into two categories based on current handling capacity and mounting technology:

Category 1 - Through-Hole Sensitive Gate (Direct Pin-Compatible)

TS1220-600H (12A RMS) and TS820-600H (8A RMS) provide higher current capacity in the same package
Both maintain sensitive gate characteristics with identical Vgt and Igt specifications
Suitable for applications where higher current margin is beneficial

Category 2 - Surface Mount Alternative

MCR708A1G (4A RMS) offers reduced current capacity in surface-mount TO-252 (DPAK) package
Maintains 600V voltage rating and sensitive gate type, but with lower gate trigger current (75 µA)
Applicable only when PCB redesign for surface-mount is feasible

Parameter Comparison

Parameter	S6006VS2	TS1220-600H	TS820-600H	TN1215-600H	MCR708A1G
Manufacturer	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics	Littelfuse Inc.
Voltage - Off State	600 V	600 V	600 V	600 V	600 V
Current - On State (It RMS)	6 A	12 A	8 A	12 A	4 A
Voltage - Gate Trigger (Vgt) Max	800 mV	800 mV	800 mV	1.3 V	800 mV
Current - Gate Trigger (Igt) Max	200 µA	200 µA	200 µA	15 mA	75 µA
Voltage - On State (Vtm) Max	1.6 V	1.6 V	1.6 V	1.6 V	2.2 V
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Standard Recovery	Sensitive Gate
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	TO-251-3 (I-Pak)	TO-251-3 (I-Pak)	TO-251-3 (I-Pak)	TO-251-3 (I-Pak)	TO-252 (DPAK)
Operating Temperature	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 110°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active

Engineering Selection Recommendations

Preferred Substitutes (Through-Hole, Pin-Compatible)

TS1220-600H and TS820-600H are the primary substitutes for the S6006VS2. Both parts maintain identical gate trigger specifications (Vgt 800 mV, Igt 200 µA), matching sensitive gate operation. TS1220-600H provides 12A RMS current capacity with extended temperature range (-40°C to 125°C) and ROHS3 compliance. TS820-600H offers 8A RMS capacity, exceeding the original 6A requirement while maintaining the same package footprint. Both are active products with established supply chains.

Secondary Substitute (Through-Hole, Different SCR Type)

TN1215-600H is a through-hole TO-251 alternative with 12A RMS capacity and ROHS3 compliance. However, it is a standard recovery SCR rather than sensitive gate type, with significantly higher gate trigger current (15 mA vs. 200 µA). This part is suitable only when gate drive circuitry can accommodate the higher trigger current requirement.

Surface-Mount Alternative (PCB Redesign Required)

MCR708A1G provides a 600V, 4A RMS sensitive gate SCR in surface-mount TO-252 (DPAK) package with ROHS3 compliance. This option requires PCB layout modification and is applicable only when current capacity of 4A RMS is sufficient for the application. The higher on-state voltage (2.2V vs. 1.6V) and lower gate trigger current (75 µA) must be evaluated against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can TS1220-600H or TS820-600H be used as direct replacements for S6006VS2?

A: Yes, both parts are pin-compatible through-hole TO-251 (I-Pak) substitutes with identical gate trigger specifications (800 mV, 200 µA). They maintain the same 600V voltage rating and sensitive gate operation. TS1220-600H and TS820-600H provide higher current capacity (12A and 8A RMS respectively) compared to the original 6A rating, offering improved design margin.

Q: Why is TN1215-600H listed as a substitute if it has different gate trigger parameters?

A: TN1215-600H maintains 600V voltage rating, through-hole TO-251 package, and 1.6V on-state voltage. However, as a standard recovery SCR with 15 mA gate trigger current (versus 200 µA for sensitive gate), it requires different gate drive circuitry. This part is a functional substitute only when the application can accommodate higher gate drive current.

Q: Is MCR708A1G suitable for direct PCB replacement?

A: No. MCR708A1G requires PCB redesign due to surface-mount TO-252 (DPAK) package versus through-hole TO-251. Additionally, the 4A RMS current rating is below the original 6A specification, and the 2.2V on-state voltage exceeds the original 1.6V maximum. This part is applicable only when PCB layout modification is feasible and current requirements do not exceed 4A RMS.

Q: What is the impact of RoHS compliance differences?

A: The original S6006VS2 is RoHS non-compliant. All active substitutes (TS1220-600H, TS820-600H, TN1215-600H, MCR708A1G) are ROHS3 compliant. For new designs or procurement in regulated markets, ROHS3-compliant substitutes are required. For legacy system maintenance, RoHS compliance may not be a selection criterion.

Q: Can I use a lower current-rated substitute if my application only requires 4A?

A: MCR708A1G (4A RMS) is current-sufficient for applications requiring 4A or less. However, it requires PCB redesign for surface-mount installation and has a higher on-state voltage (2.2V). For through-hole applications, TS820-600H (8A RMS) is preferred as it maintains package compatibility while providing adequate current margin.

Q: What are the temperature operating range implications?

A: The original S6006VS2 operates from -40°C to 110°C. TS1220-600H, TS820-600H, and TN1215-600H extend the upper limit to 125°C, providing wider temperature margin. MCR708A1G maintains the -40°C to 110°C range. For applications operating near 110°C, the extended range of STMicroelectronics parts offers additional design headroom.

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