S8006V Equivalent & Substitute Parts

Part Overview

The S8006V is an SCR (Silicon Controlled Rectifier) rated at 800V with 6A RMS current capacity, manufactured by Littelfuse Inc. in a through-hole TO-251 package. This component is classified as a Standard Recovery thyristor designed for high-voltage switching applications. The S8006V is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and system maintenance.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	6 A
Voltage - On State (Vtm) (Max)	1.6 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V
Current - Gate Trigger (Igt) (Max)	15 mA
Current - Hold (Ih) (Max)	30 mA
Operating Temperature Range	-40°C to 125°C
SCR Type	Standard Recovery
Mounting Type	Through Hole
Package / Case	TO-251-3

Substitute Part Grouping Explanation

The MCR12DSN-1G qualifies as a functional equivalent based on the following critical parameters:

Voltage Rating Compatibility: Both parts maintain 800V off-state voltage, meeting the primary voltage requirement for high-voltage switching applications.

Current Capacity: The MCR12DSN-1G provides 12A RMS current capacity, which exceeds the S8006V's 6A RMS rating. This higher current capacity allows the substitute to handle the same or greater load conditions.

Gate Trigger Characteristics: The MCR12DSN-1G features a lower gate trigger voltage (1V maximum) and reduced gate trigger current (200µA maximum) compared to the S8006V (1.5V, 15mA). These parameters indicate a Sensitive Gate design, which provides improved gate sensitivity for triggering applications.

On-State Voltage: The MCR12DSN-1G on-state voltage (1.9V maximum) is slightly higher than the S8006V (1.6V maximum), remaining within acceptable operating margins for thyristor applications.

Temperature Range: The MCR12DSN-1G operates across -40°C to 110°C, which covers the lower end of the S8006V range (-40°C to 125°C). Applications requiring operation above 110°C require verification against specific system requirements.

Package Difference: The MCR12DSN-1G uses surface-mount TO-252 (DPAK) packaging, whereas the S8006V uses through-hole TO-251 packaging. This represents a fundamental change in mounting technology and PCB integration approach.

Parameter Comparison

Parameter	S8006V	MCR12DSN-1G
Manufacturer	Littelfuse Inc.	Littelfuse Inc.
Category	Thyristors	Thyristors
Voltage - Off State	800 V	800 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1 V
Current - Gate Trigger (Igt) (Max)	15 mA	200 µA
Voltage - On State (Vtm) (Max)	1.6 V	1.9 V
Current - On State (It (RMS)) (Max)	6 A	12 A
Current - Hold (Ih) (Max)	30 mA	6 mA
Current - Off State (Max)	10 µA	10 µA
SCR Type	Standard Recovery	Sensitive Gate
Operating Temperature	-40°C to 125°C	-40°C to 110°C
Mounting Type	Through Hole	Surface Mount
Package / Case	TO-251-3	TO-252-3 (DPAK)
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MCR12DSN-1G is available as an active product with ROHS3 compliance, addressing the obsolescence of the discontinued S8006V. The substitute provides equivalent voltage ratings and superior current capacity with improved gate sensitivity characteristics.

Selection of the MCR12DSN-1G requires PCB redesign due to the transition from through-hole TO-251 to surface-mount TO-252 (DPAK) packaging. This packaging change affects board layout, thermal management, and assembly processes.

The operating temperature range of the MCR12DSN-1G (-40°C to 110°C) is narrower than the S8006V (-40°C to 125°C). Applications requiring operation above 110°C must evaluate alternative solutions or confirm that system requirements remain within the MCR12DSN-1G specifications.

The Sensitive Gate design of the MCR12DSN-1G reduces gate trigger current requirements (200µA versus 15mA), potentially simplifying gate drive circuitry in new designs.

Frequently Asked Questions (FAQ)

Q: Can the MCR12DSN-1G directly replace the S8006V without circuit modifications?

A: Electrical substitution is possible based on voltage and current ratings. However, the packaging change from through-hole TO-251 to surface-mount TO-252 (DPAK) requires PCB redesign. Gate drive circuits may be simplified due to the Sensitive Gate design and lower trigger current requirements.

Q: What is the significance of the Sensitive Gate designation on the MCR12DSN-1G?

A: Sensitive Gate SCRs require lower gate trigger current (200µA maximum) compared to Standard Recovery types (15mA maximum). This reduces gate drive power requirements and allows simpler triggering circuits.

Q: Does the higher on-state voltage of the MCR12DSN-1G (1.9V vs. 1.6V) affect system performance?

A: The 0.3V difference in on-state voltage increases power dissipation in the thyristor. For applications with tight thermal budgets or high current operation, this difference must be evaluated against system thermal design margins.

Q: Is the MCR12DSN-1G suitable for applications requiring operation above 110°C?

A: The MCR12DSN-1G maximum operating temperature is 110°C. Applications requiring operation above this temperature must use alternative components or confirm that system requirements remain within this specification.

Q: What are the compliance differences between the S8006V and MCR12DSN-1G?

A: The S8006V is RoHS non-compliant. The MCR12DSN-1G is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for new designs.

Q: How does the higher current rating of the MCR12DSN-1G (12A vs. 6A) affect thermal design?

A: The MCR12DSN-1G can handle twice the RMS current of the S8006V. Thermal management depends on actual operating current, gate drive frequency, and package thermal characteristics. Surface-mount TO-252 (DPAK) packaging typically provides different thermal performance than through-hole TO-251.

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