BZX84C3V6LT1 Equivalent & Substitute Parts

Part Overview

The BZX84C3V6LT1 is a Zener diode rated at 3.6 V nominal with 225 mW maximum power dissipation in a surface mount SOT-23-3 (TO-236) package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status and limited availability, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability, compliance certifications, and manufacturing support.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.6	V
Tolerance	±6%	—
Power - Max	225	mW
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BZX84C3V6LT1 is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - Zener (Nom): 3.6 V (exact match required)
Power - Max: 225 mW or greater
Impedance (Max): 90 Ohms (exact match)
Current - Reverse Leakage @ Vr: 5 µA @ 1 V (exact match)
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA (exact match)
Operating Temperature Range: -65°C to 150°C (minimum requirement)

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount (required)
Package / Case: TO-236-3, SC-59, or SOT-23-3 (interchangeable designations)

Tolerance Consideration: The main part specifies ±6% tolerance. Substitute parts with ±5% or ±1% tolerance are electrically superior and fully compatible, as tighter tolerances represent enhanced performance within the same voltage specification.

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (same manufacturer, active status), Parametric Equivalents (enhanced specifications, automotive-grade), and Similar Parts (alternative manufacturers, higher power ratings or tighter tolerances).

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ 10mA (mV)	Temp Range (°C)	Status	RoHS	AEC-Q101
BZX84C3V6LT1	onsemi	3.6	±6%	225	90	900	-65 to 150	Obsolete	Non-compliant	—
BZX84C3V6LT1G	onsemi	3.6	±6%	225	90	900	-65 to 150	Active	ROHS3 Compliant	—
SZBZX84C3V6ET1G	onsemi	3.6	±5%	225	90	900	-65 to 150	Active	ROHS3 Compliant	Yes
SZBZX84C3V6LT1G	onsemi	3.6	±5%	225	90	900	-65 to 150	Active	ROHS3 Compliant	Yes
SZBZX84C3V6LT3G	onsemi	3.6	±5%	225	90	900	-65 to 150	Active	ROHS3 Compliant	Yes
BZX84-C3V6,215	NXP Semiconductors	3.6	±5%	250	90	900	-65 to 150	Active	ROHS3 Compliant	Yes
BZX84-A3V6,215	Nexperia USA Inc.	3.6	±1%	250	90	900	-65 to 150	Active	ROHS3 Compliant	Yes
BZX84-C3V6,235	NXP USA Inc.	3.6	±5%	250	90	900	-65 to 150	Active	—	Yes
BZX84C3V6-7-F	Diodes Incorporated	3.6	±6%	300	90	900	-65 to 150	Active	ROHS3 Compliant	—
BZX84C3V6-TP	Micro Commercial Co	3.6	±6%	350	90	900	-55 to 150	Active	ROHS3 Compliant	—

Engineering Selection Recommendations

Primary Recommendation: BZX84C3V6LT1G

The BZX84C3V6LT1G is the direct equivalent from onsemi with identical electrical specifications and package configuration. This part is in active production status with ROHS3 compliance and significantly higher inventory availability (65,300 units). Selection of this part eliminates obsolescence risk while maintaining full electrical and mechanical compatibility.

Secondary Recommendation for Automotive Applications: SZBZX84C3V6LT1G or SZBZX84C3V6LT3G

Both SZBZX84C3V6LT1G and SZBZX84C3V6LT3G are onsemi automotive-grade alternatives with AEC-Q101 qualification. These parts feature improved ±5% tolerance specification and ROHS3 compliance. The SZBZX84C3V6LT3G variant offers higher inventory (27,221 units) compared to SZBZX84C3V6LT1G (3,100 units). These selections are appropriate for applications requiring automotive-grade components.

Alternative Recommendation for Higher Power Dissipation: BZX84C3V6-7-F

The BZX84C3V6-7-F from Diodes Incorporated provides 300 mW maximum power rating, exceeding the original 225 mW specification. This part maintains all other electrical parameters and is suitable for applications requiring additional thermal margin. Operating temperature range is -65°C to 150°C, matching the original specification.

Alternative Recommendation for Maximum Power Margin: BZX84C3V6-TP

The BZX84C3V6-TP from Micro Commercial Co provides 350 mW maximum power rating with the widest thermal margin. Operating temperature range is -55°C to 150°C. This selection is appropriate for applications with elevated ambient temperatures or thermal stress conditions.

NXP Alternatives: BZX84-C3V6,215 and BZX84-A3V6,215

NXP Semiconductors offers BZX84-C3V6,215 (±5% tolerance, 250 mW) and BZX84-A3V6,215 (±1% tolerance, 250 mW) with AEC-Q101 qualification. The BZX84-A3V6,215 provides the tightest tolerance specification (±1%) and is suitable for precision voltage regulation applications. Both parts are in active production with high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can BZX84C3V6LT1G be used as a direct replacement for BZX84C3V6LT1?

A: Yes. BZX84C3V6LT1G is electrically and mechanically identical to BZX84C3V6LT1. The primary difference is product status (active versus obsolete) and compliance certifications (ROHS3 compliant). This is the recommended direct substitute.

Q: What is the difference between BZX84C3V6LT1G and SZBZX84C3V6LT1G?

A: Both parts share identical electrical specifications and package configuration. SZBZX84C3V6LT1G is automotive-grade with AEC-Q101 qualification and features ±5% tolerance compared to ±6% for BZX84C3V6LT1G. Selection depends on application requirements for automotive qualification.

Q: Are the NXP parts (BZX84-C3V6,215 and BZX84-A3V6,215) compatible with the onsemi BZX84C3V6LT1?

A: Yes. All parts maintain the same 3.6 V nominal voltage, 90 Ohm impedance, and SOT-23-3 package configuration. NXP parts offer higher power ratings (250 mW versus 225 mW) and improved tolerance specifications. Operating temperature ranges are identical.

Q: What is the significance of the ±5% tolerance in SZBZX84C3V6LT1G compared to ±6% in BZX84C3V6LT1?

A: Tighter tolerance (±5%) indicates improved voltage regulation accuracy. The part will maintain the 3.6 V specification within a narrower band, reducing voltage variation across the production lot. This is beneficial for precision applications but not required for general-purpose voltage regulation.

Q: Can BZX84C3V6-7-F (300 mW) or BZX84C3V6-TP (350 mW) be used in place of the 225 mW original part?

A: Yes. Higher power ratings are fully compatible and represent enhanced thermal capability. These parts are suitable for applications requiring additional power dissipation margin or operation in elevated temperature environments. All other electrical parameters remain identical.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts bearing this qualification have undergone rigorous testing for reliability, temperature cycling, and performance consistency. Selection of AEC-Q101 qualified parts is required for automotive applications.

Q: Are all substitute parts RoHS compliant?

A: Most substitute parts listed are ROHS3 compliant. The original BZX84C3V6LT1 is RoHS non-compliant. If RoHS compliance is a design requirement, select from ROHS3 compliant alternatives: BZX84C3V6LT1G, SZBZX84C3V6ET1G, SZBZX84C3V6LT1G, SZBZX84C3V6LT3G, BZX84-C3V6,215, BZX84-A3V6,215, BZX84C3V6-7-F, or BZX84C3V6-TP.

Q: What is the difference between SOT-23-3 and TO-236-3 package designations?

A: SOT-23-3 and TO-236-3 are equivalent package designations for the same physical component. SC-59 is an alternative designation for the same package. All three designations refer to a three-lead surface mount package with identical pin configuration and footprint.

Q: Is the operating temperature range difference in BZX84C3V6-TP (-55°C to 150°C versus -65°C to 150°C) significant?

A: The BZX84C3V6-TP has a higher minimum operating temperature (-55°C versus -65°C). This is not a limitation for most applications operating above -55°C. Selection of this part is appropriate unless the application requires operation below -55°C.

Q: Which substitute part offers the best availability?

A: BZX84-C3V6,215 from NXP Semiconductors offers the highest inventory availability at 554,745 units. BZX84C3V6LT1G from onsemi provides 65,300 units. Both parts are suitable for high-volume production requirements.

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