S6012VTP SCR 600V 12A TO-251 Equivalent & Substitute Parts

Part Overview

The S6012VTP is a standard recovery silicon controlled rectifier (SCR) manufactured by Littelfuse, rated for 600V off-state voltage and 12A RMS on-state current in a through-hole TO-251 (V-Pak/I-Pak) package. This component is active and in production with 708 units currently in stock. Substitute parts are necessary when addressing supply constraints, lead time requirements, or when design specifications permit operation with alternative SCR characteristics within the same voltage class and current rating range.

Key Parameters

Parameter	S6012VTP
Voltage - Off State	600 V
Current - On State (It RMS)	12 A
Voltage - On State (Vtm) Max	1.6 V
Voltage - Gate Trigger (Vgt) Max	1.5 V
Current - Gate Trigger (Igt) Max	20 mA
Current - Hold (Ih) Max	40 mA
SCR Type	Standard Recovery
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the S6012VTP is determined by the following critical parameters:

Voltage Class: All substitute parts must maintain 600V off-state voltage rating to ensure equivalent blocking capability in the application circuit.

Current Rating: Substitute parts are grouped by on-state RMS current capacity. The S6012VTP operates at 12A RMS, permitting direct substitution only with parts rated for 12A RMS or higher. Parts rated below 12A RMS (such as 4A or 8A variants) are not direct substitutes but are listed for reference in applications with reduced current requirements.

SCR Type: The S6012VTP is a standard recovery SCR. Sensitive gate variants (lower gate trigger voltage and current) are functionally compatible but represent a different device class with altered gate drive characteristics.

Mounting Type and Package: The S6012VTP uses through-hole TO-251 packaging. Direct substitutes must use identical or compatible through-hole TO-251 packages. Surface mount variants (DPAK/TO-252) are not mechanically compatible.

Operating Temperature Range: The S6012VTP operates from -40°C to 125°C. Substitute parts must support this range or a superset thereof.

Parameter Comparison

Parameter	S6012VTP (Littelfuse)	TN1215-600H (STMicroelectronics)	TS1220-600H (STMicroelectronics)	TS820-600H (STMicroelectronics)	TS420-600H (STMicroelectronics)	MCR708A1G (Littelfuse)
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It RMS)	12 A	12 A	12 A	8 A	4 A	4 A
Voltage - On State (Vtm) Max	1.6 V	1.6 V	1.6 V	1.6 V	1.6 V	2.2 V
Voltage - Gate Trigger (Vgt) Max	1.5 V	1.3 V	800 mV	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) Max	20 mA	15 mA	200 µA	200 µA	200 µA	75 µA
Current - Hold (Ih) Max	40 mA	40 mA	5 mA	5 mA	5 mA	5 mA
SCR Type	Standard Recovery	Standard Recovery	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, I-PAK	TO-251-3 Short Leads, IPak, TO-251AA	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 110°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Substitutes (12A RMS Rating):

TN1215-600H and TS1220-600H are the primary direct substitutes for the S6012VTP. Both maintain 600V voltage rating and 12A RMS current capacity. TN1215-600H is a standard recovery device matching the S6012VTP classification, while TS1220-600H is a sensitive gate variant with lower gate trigger requirements. Both are manufactured by STMicroelectronics, are ROHS3 compliant, and support the full -40°C to 125°C operating range. TN1215-600H offers 2,100 units in stock; TS1220-600H offers 41,300 units in stock.

Current-Limited Substitutes (Below 12A RMS):

TS820-600H (8A RMS) and TS420-600H (4A RMS) are not direct substitutes but are compatible alternatives for applications with reduced current requirements. Both are sensitive gate devices with 600V rating and through-hole TO-251 packaging. TS820-600H provides 2,100 units in stock; TS420-600H provides 1,898 units in stock.

Non-Compatible Substitute:

MCR708A1G is a 4A RMS sensitive gate SCR with surface mount TO-252 (DPAK) packaging. While electrically compatible at reduced current levels, the surface mount package is not mechanically compatible with through-hole PCB designs. This part is listed for reference only in applications permitting surface mount technology. MCR708A1G offers 8,425 units in stock and operates to -40°C to 110°C.

All listed parts are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use TN1215-600H as a direct replacement for S6012VTP?

A: Yes. TN1215-600H maintains identical 600V voltage rating, 12A RMS current capacity, and through-hole TO-251 packaging. Both are standard recovery SCRs with compatible on-state voltage characteristics (1.6V maximum). Gate trigger specifications differ slightly (TN1215-600H: 1.3V maximum vs. S6012VTP: 1.5V maximum), but this represents improved performance within the same functional class.

Q: What is the difference between standard recovery and sensitive gate SCRs?

A: Standard recovery SCRs (S6012VTP, TN1215-600H) require higher gate trigger voltage and current to initiate conduction. Sensitive gate SCRs (TS1220-600H, TS820-600H, TS420-600H, MCR708A1G) require lower gate trigger voltage (800mV maximum) and current (75µA to 200µA maximum), reducing gate drive circuit complexity. Sensitive gate devices are functionally compatible substitutes but require verification that the application gate drive circuit can accommodate the lower trigger thresholds.

Q: Can I use TS820-600H (8A) in place of S6012VTP (12A)?

A: TS820-600H is not a direct substitute due to reduced current rating. Use only if the application circuit operates at 8A RMS or below. The 600V voltage rating and through-hole TO-251 packaging are compatible, but exceeding the 8A RMS rating will cause device failure.

Q: Why is MCR708A1G listed if it is not mechanically compatible?

A: MCR708A1G is included for reference in design reviews where surface mount technology is acceptable. The part shares the same 600V voltage class and manufacturer (Littelfuse) but uses TO-252 (DPAK) surface mount packaging. It is not suitable for through-hole PCB applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts (S6012VTP, TN1215-600H, TS1220-600H, TS820-600H, TS420-600H, MCR708A1G) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the maximum operating temperature difference between substitutes?

A: S6012VTP, TN1215-600H, TS1220-600H, TS820-600H, and TS420-600H all operate from -40°C to 125°C. MCR708A1G operates from -40°C to 110°C, providing a 15°C lower maximum temperature rating. Verify application thermal requirements before selecting MCR708A1G.

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