BSS126L6906HTSA1 Equivalent & Substitute Parts

Part Overview

The BSS126L6906HTSA1 is an N-Channel 600V MOSFET manufactured by Infineon Technologies in the SIPMOS® series, housed in a SOT-23-3 surface mount package. This depletion mode device is rated for 21mA continuous drain current and 500mW power dissipation, designed for low-power switching applications requiring high voltage capability.

The BSS126L6906HTSA1 carries an Obsolete product status. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and legacy system requirements where this part is specified in existing designs.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	21	mA
Rds On (Max) @ 16mA, 10V	500	Ohm
Gate Threshold Voltage (Vgs(th)) @ 8µA	1.6	V
Gate Charge (Qg) @ 5V	2.1	nC
Input Capacitance (Ciss) @ 25V	28	pF
Power Dissipation (Max)	500	mW
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-3
FET Feature	Depletion Mode

Substitute Part Grouping Explanation

Substitution eligibility for the BSS126L6906HTSA1 is determined by the following critical parameters:

Primary Matching Criteria:

Drain to Source Voltage (Vdss): 600V minimum
Package Type: SOT-23-3 (TO-236-3, SC-59)
Mounting Type: Surface Mount
FET Type: N-Channel
Technology: MOSFET (Metal Oxide)

Secondary Compatibility Parameters:

Continuous Drain Current (Id): 21mA or greater
Rds On (Max) @ 16mA, 10V: 500 Ohm or less
Gate Threshold Voltage (Vgs(th)): Compatible gate drive requirements
Operating Temperature Range: -55°C to 150°C or broader
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on parametric equivalence and product status:

Category 1: Parametric Equivalents (Infineon SIPMOS® Series) Parts BSS126H6327XTSA2 and BSS126H6906XTSA1 maintain identical electrical specifications across all critical parameters while differing in product status and packaging format.

Category 2: Manufacturer Recommended Alternative (Alpha & Omega Semiconductor) Part AO3162 provides functional substitution with enhanced performance characteristics (34mA drain current, 1.39W power dissipation) while maintaining the 600V voltage rating and SOT-23-3 package compatibility.

Parameter Comparison

Parameter	BSS126L6906HTSA1	BSS126H6327XTSA2	BSS126H6906XTSA1	AO3162
Manufacturer	Infineon	Infineon	Infineon	Alpha & Omega
Vdss (V)	600	600	600	600
Id @ 25°C (mA)	21	21	21	34
Rds On @ 16mA, 10V (Ohm)	500	500	500	500
Vgs(th) @ 8µA (V)	1.6	1.6	1.6	4.1
Qg @ Vgs (nC)	2.1 @ 5V	2.1 @ 5V	2.1 @ 5V	0.15 @ 10V
Ciss @ 25V (pF)	28	28	28	6
Power Dissipation (mW)	500	500	500	1390
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 150	-50 to 150
Package	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: BSS126H6327XTSA2

The BSS126H6327XTSA2 is the preferred substitute for the obsolete BSS126L6906HTSA1. This part maintains identical electrical specifications across all critical parameters: 600V Vdss, 21mA continuous drain current, 500 Ohm Rds On, and 500mW power dissipation. The BSS126H6327XTSA2 carries Active product status, ensuring long-term availability and supply chain continuity. It is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging formats with substantial inventory (53,300 pcs). This part is suitable for direct replacement in existing designs without circuit modification.

Secondary Recommendation: BSS126H6906XTSA1

The BSS126H6906XTSA1 provides parametric equivalence identical to the primary recommendation. However, this part carries a Not For New Designs status, limiting its suitability for new applications. It is available in Tape & Reel packaging with 8,360 pcs in stock. This part may be considered for legacy system support where supply of the primary recommendation is constrained.

Alternative Recommendation: AO3162

The AO3162 from Alpha & Omega Semiconductor offers functional substitution with enhanced performance characteristics. It maintains the 600V voltage rating and SOT-23-3 package compatibility. The AO3162 provides higher continuous drain current (34mA versus 21mA) and greater power dissipation capability (1.39W versus 500mW), making it suitable for applications requiring additional thermal or current margin. However, the AO3162 exhibits different gate threshold voltage (4.1V versus 1.6V) and significantly lower gate charge (0.15 nC versus 2.1 nC), which may require gate drive circuit evaluation. The AO3162 carries Not For New Designs status and is ROHS3 compliant with 13,561 pcs available.

Frequently Asked Questions (FAQ)

Q: Can BSS126H6327XTSA2 be used as a direct replacement for BSS126L6906HTSA1?

A: Yes. The BSS126H6327XTSA2 is a direct parametric equivalent. All critical electrical specifications are identical: 600V Vdss, 21mA Id, 500 Ohm Rds On, 1.6V Vgs(th), and 500mW power dissipation. Both parts use the SOT-23-3 package. No circuit modifications are required.

Q: What is the difference between BSS126H6327XTSA2 and BSS126H6906XTSA1?

A: Both parts are parametric equivalents with identical electrical specifications. The primary difference is product status: BSS126H6327XTSA2 is Active, while BSS126H6906XTSA1 is Not For New Designs. Packaging format also differs: BSS126H6327XTSA2 is available in Cut Tape and Digi-Reel, while BSS126H6906XTSA1 is supplied in Tape & Reel.

Q: Can AO3162 replace BSS126L6906HTSA1 in all applications?

A: AO3162 provides functional substitution with enhanced performance but requires evaluation of gate drive compatibility. The AO3162 has a higher gate threshold voltage (4.1V versus 1.6V) and significantly lower gate charge (0.15 nC versus 2.1 nC). Existing gate drive circuits designed for the BSS126L6906HTSA1 may require adjustment. The higher drain current (34mA) and power dissipation (1.39W) of the AO3162 are beneficial for applications requiring additional margin.

Q: Are all substitute parts ROHS3 compliant?

A: BSS126H6327XTSA2, BSS126H6906XTSA1, and AO3162 are all ROHS3 compliant. The original BSS126L6906HTSA1 RoHS status is not specified in available documentation.

Q: What packaging formats are available for each substitute?

A: BSS126H6327XTSA2 is available in Cut Tape (CT) and Digi-Reel formats. BSS126H6906XTSA1 is supplied in Tape & Reel (TR). AO3162 is available in Tape & Reel (TR). All parts use the SOT-23-3 package.

Q: Which substitute has the best long-term availability?

A: BSS126H6327XTSA2 is the recommended choice for long-term availability. It carries Active product status with 53,300 pcs in stock, significantly higher inventory than other options. Both BSS126H6906XTSA1 and AO3162 carry Not For New Designs status, which may limit future availability.

Q: Are there any moisture sensitivity concerns with these parts?

A: All parts, including the original BSS126L6906HTSA1, carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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