BZX84C3V6-7-F-79 Equivalent & Substitute Parts

Part Overview

The BZX84C3V6-7-F-79 is a 3.6 V Zener diode rated for 300 mW power dissipation in a surface mount SOT-23-3 package, manufactured by Diodes Incorporated. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while conforming to the same physical package specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	3.6	V
Tolerance	±5.56%	%
Power - Maximum	300	mW
Impedance (Maximum)	90	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	SOT-23-3	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the BZX84C3V6-7-F-79 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage (Vz) must equal 3.6 V
Maximum power dissipation must be 300 mW or greater
Impedance (Zzt) must not exceed 90 Ohms
Reverse leakage current must not exceed 5 µA @ 1 V
Forward voltage must not exceed 900 mV @ 10 mA
Operating temperature range must encompass -65°C to 150°C

Mechanical Compatibility Requirements:

Package must be SOT-23-3 (TO-236-3, SC-59)
Mounting type must be surface mount

Regulatory Compliance:

RoHS3 compliance required
REACH unaffected status required

Substitute parts are grouped into two categories: direct packaging equivalents (identical packaging and tape & reel specifications) and parametric equivalents (identical electrical specifications with enhanced tolerance or automotive qualification). All listed substitutes maintain full electrical and mechanical compatibility with the original part.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power (mW)	Zzt (Ohms)	Vf Max @ If (mV @ mA)	Temp Range (°C)	Package	Status	Qualification
BZX84C3V6-7-F-79	Diodes Incorporated	3.6	±5.56	300	90	900 @ 10	-65 to 150	SOT-23-3	Obsolete	-
BZX84C3V6-7-F	Diodes Incorporated	3.6	±6	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	-
BZX84B3V6Q-7-F	Diodes Incorporated	3.6	±2	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	AEC-Q101
BZX84C3V6Q-13-F	Diodes Incorporated	3.6	±5.56	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	AEC-Q101
BZX84C3V6Q-7-F	Diodes Incorporated	3.6	±5.56	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	AEC-Q101
BZX84C3V6	Taiwan Semiconductor Corporation	3.6	±5.56	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	-
BZX84C3V6 RFG	Taiwan Semiconductor Corporation	3.6	±5	300	90	900 @ 10	-65 to 150	SOT-23-3	Active	-

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: BZX84C3V6-7-F (Diodes Incorporated) is the active production equivalent of the obsolete BZX84C3V6-7-F-79. This part maintains identical electrical specifications and packaging, with only a minor tolerance variance (±6% versus ±5.56%). Inventory availability is significantly higher at 16,880 units.

Secondary Recommendation - Enhanced Tolerance: BZX84B3V6Q-7-F (Diodes Incorporated) provides tighter tolerance control at ±2% and includes AEC-Q101 automotive qualification. This part is suitable for applications requiring enhanced voltage regulation precision and automotive-grade reliability. Active status with 36,310 units in stock.

Alternative Recommendation - Automotive Grade: BZX84C3V6Q-7-F and BZX84C3V6Q-13-F (Diodes Incorporated) both provide AEC-Q101 automotive qualification with active product status. These parts maintain the original ±5.56% tolerance specification and are suitable for automotive and mission-critical applications.

Cross-Manufacturer Alternative: BZX84C3V6 and BZX84C3V6 RFG (Taiwan Semiconductor Corporation) provide electrical equivalence with active product status. These parts are suitable for non-automotive applications where manufacturer diversity is acceptable. Tolerance specifications are ±5.56% and ±5% respectively.

All recommended substitutes maintain full compliance with RoHS3 and REACH requirements, identical operating temperature ranges, and SOT-23-3 package compatibility.

Frequently Asked Questions (FAQ)

Q: Can BZX84C3V6-7-F directly replace BZX84C3V6-7-F-79? A: Yes. BZX84C3V6-7-F is the active production equivalent with identical electrical specifications and SOT-23-3 packaging. The tolerance specification differs slightly (±6% versus ±5.56%), which remains within acceptable substitution parameters for standard voltage regulation applications.

Q: What is the difference between BZX84C3V6Q-7-F and BZX84C3V6-7-F? A: BZX84C3V6Q-7-F includes AEC-Q101 automotive qualification and is supplied in tape & reel packaging with 3,000-unit reels. BZX84C3V6-7-F is the standard industrial grade equivalent. Both maintain identical electrical specifications and SOT-23-3 packaging.

Q: Why is BZX84B3V6Q-7-F listed as a substitute if it has different tolerance? A: BZX84B3V6Q-7-F provides tighter tolerance (±2%) and AEC-Q101 qualification, making it a parametric upgrade suitable for applications requiring enhanced voltage regulation precision. The tighter tolerance is a functional improvement, not a limitation, for voltage reference applications.

Q: Are Taiwan Semiconductor Corporation parts (BZX84C3V6) compatible with Diodes Incorporated designs? A: Yes. BZX84C3V6 and BZX84C3V6 RFG maintain identical electrical specifications, operating temperature ranges, and SOT-23-3 packaging. These parts are suitable for applications where cross-manufacturer sourcing is acceptable. Automotive qualification is not included.

Q: What packaging format should be selected for production assembly? A: BZX84C3V6-7-F, BZX84B3V6Q-7-F, BZX84C3V6Q-13-F, and BZX84C3V6Q-7-F are supplied in tape & reel (TR) format suitable for automated pick-and-place assembly. BZX84C3V6 and BZX84C3V6 RFG are also available in tape & reel format. Verify specific reel quantities (3K, 10K, etc.) with supplier documentation.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: Can these parts be used interchangeably in automotive applications? A: Parts with AEC-Q101 qualification (BZX84B3V6Q-7-F, BZX84C3V6Q-13-F, BZX84C3V6Q-7-F) are suitable for automotive applications. Standard industrial grade parts (BZX84C3V6-7-F, BZX84C3V6, BZX84C3V6 RFG) are not automotive qualified and should not be used in automotive designs without design review and validation.

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