Q2012LH5 TRIAC Alternistor Equivalent & Substitute Parts

Part Overview

The Q2012LH5 is a Snubberless TRIAC Alternistor rated for 200 V off-state voltage and 12 A on-state current in a TO-220 Isolated Tab package. Manufactured by Littelfuse Inc., this component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -40°C to 125°C and is ROHS3 compliant.

Key Parameters

Parameter	Value
Manufacturer Part Number	Q2012LH5
Manufacturer	Littelfuse Inc.
Category	Thyristors
Triac Type	Alternistor - Snubberless
Voltage - Off State	200 V
Current - On State (It (RMS)) (Max)	12 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	50 mA
Current - Hold (Ih) (Max)	50 mA
Configuration	Single
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q2012LH5 is determined by the following critical parameters:

Voltage Rating (Off State): The substitute must support the application voltage. The Q2012LH5 operates at 200 V; substitutes rated at 600 V provide higher voltage margin and are electrically compatible for 200 V applications.
Current Rating (On State): Both substitutes maintain the 12 A maximum on-state current specification.
Gate Trigger Voltage (Vgt): Maximum 1.3 V to 1.5 V range ensures gate drive compatibility.
Gate Trigger Current (Igt): Maximum 50 mA specification is maintained across all parts.
Mounting Type and Package: All substitutes use Through Hole TO-220 packaging, ensuring mechanical and thermal compatibility.
Operating Temperature Range: All parts support -40°C to 125°C operation.
Configuration: Single TRIAC configuration across all parts.

The two identified substitutes differ in TRIAC type classification (Alternistor - Snubberless vs. Standard) and specific surge current ratings, but both meet the core electrical and mechanical requirements for direct substitution in 200 V, 12 A applications.

Parameter Comparison

Parameter	Q2012LH5	BTA12-600BWRG	BTA212X-600B,127
Manufacturer	Littelfuse Inc.	STMicroelectronics	WeEn Semiconductors
Triac Type	Alternistor - Snubberless	Alternistor - Snubberless	Standard
Voltage - Off State	200 V	600 V	600 V
Current - On State (It (RMS)) (Max)	12 A	12 A	12 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.5 V
Current - Gate Trigger (Igt) (Max)	50 mA	50 mA	50 mA
Current - Hold (Ih) (Max)	50 mA	50 mA	60 mA
Configuration	Single	Single	Single
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Isolated Tab	TO-220-3	TO-220-3 Full Pack, Isolated Tab
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

BTA12-600BWRG (STMicroelectronics): This substitute is classified as active product status with ROHS3 compliance. It maintains the Snubberless Alternistor type matching the original Q2012LH5 and provides identical gate trigger voltage specification (1.3 V maximum). The 600 V off-state voltage rating provides increased voltage margin for 200 V applications. Current availability is 30,430 pieces in stock.

BTA212X-600B,127 (WeEn Semiconductors): This substitute is classified as active product status with RoHS compliance. It differs from the original in TRIAC type classification (Standard vs. Snubberless) and gate trigger voltage specification (1.5 V maximum vs. 1.3 V maximum). The 600 V off-state voltage rating provides increased voltage margin. Current availability is 713 pieces in stock.

Both substitutes maintain the 12 A on-state current rating, 50 mA gate trigger current, single configuration, and through-hole TO-220 mounting required for direct replacement in the Q2012LH5 application.

Frequently Asked Questions (FAQ)

Q: Can BTA12-600BWRG directly replace Q2012LH5 in existing designs?

A: Yes. Both parts share identical on-state current (12 A), gate trigger current (50 mA), gate trigger voltage (1.3 V maximum), and operating temperature range (-40°C to 125°C). The higher 600 V off-state voltage rating of the BTA12-600BWRG is compatible with 200 V applications. Both use TO-220 through-hole packaging with isolated tab configuration.

Q: Can BTA212X-600B,127 directly replace Q2012LH5?

A: Yes, with the following considerations. The BTA212X-600B,127 maintains 12 A on-state current, 50 mA gate trigger current, and TO-220 through-hole packaging. The gate trigger voltage specification is 1.5 V maximum compared to 1.3 V maximum for the Q2012LH5, which may affect gate drive circuit design. The TRIAC type differs (Standard vs. Snubberless). The operating temperature range specification differs (125°C maximum vs. -40°C to 125°C range).

Q: What is the difference between Snubberless and Standard TRIAC types?

A: This information is not provided in the component specifications. Consult manufacturer datasheets for detailed functional differences.

Q: Are all substitutes available in the same package configuration?

A: All three parts use TO-220-3 through-hole packaging. The Q2012LH5 and BTA212X-600B,127 specify isolated tab configuration. The BTA12-600BWRG specifies standard TO-220 packaging. Verify mechanical compatibility with your PCB layout and thermal management requirements.

Q: Which substitute has the best availability?

A: BTA12-600BWRG has 30,430 pieces in stock. BTA212X-600B,127 has 713 pieces in stock. Availability may vary by distributor and region.

Q: Are all substitutes RoHS compliant?

A: Yes. Q2012LH5 is ROHS3 compliant. BTA12-600BWRG is ROHS3 compliant. BTA212X-600B,127 is RoHS compliant.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message