BZX84C36-7 Equivalent & Substitute Parts

Part Overview

The BZX84C36-7 is a 36 V, 300 mW Zener diode manufactured by Diodes Incorporated in SOT-23-3 surface mount packaging. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -65°C to 150°C with ±6% voltage tolerance and is RoHS non-compliant. Equivalent alternatives are available from multiple manufacturers with improved compliance status and active product availability.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Power - Max	300	mW
Tolerance	±6%	—
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 25.2 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BZX84C36-7 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 36 V nominal
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting: Surface mount
Operating temperature range: -65°C to 150°C minimum

Secondary Compatibility Factors:

Power dissipation: 300 mW or greater
Impedance: 90 Ohms maximum
Forward voltage: 900 mV maximum @ 10 mA
Reverse leakage current: 100 nA or less @ 25.2 V

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications with improved compliance) and Manufacturer Recommended Alternatives (functionally compatible with minor parameter variations). Parts meeting all primary criteria and operating within secondary parameter bounds are considered direct substitutes.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (mW)	Tolerance	Impedance (Ω)	Reverse Leakage (nA)	Vf (mV)	Temp Range (°C)	Product Status	RoHS
BZX84C36-7	Diodes Inc.	36	300	±6%	90	100 @ 25.2V	900 @ 10mA	-65 to 150	Discontinued	Non-compliant
BZX84B36-7-F	Diodes Inc.	36	300	±2%	90	100 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
BZX84C36-7-F	Diodes Inc.	36	300	±6%	90	100 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
BZX84-A36,215	Nexperia USA Inc.	36	250	±1%	90	50 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
BZX84-C36,215	Nexperia USA Inc.	36	250	±5%	90	50 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
BZX84-C36,235	Nexperia USA Inc.	36	250	±5%	90	50 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
BZX84B36-HE3-08	Vishay General Semiconductor	36	300	±2%	90	50 @ 25.2V	—	-55 to 150	Obsolete	ROHS3 Compliant
BZX84C36_R1_00001	Panjit International Inc.	36	410	±5%	90	100 @ 25.2V	—	-55 to 150	Active	ROHS3 Compliant
BZX84C36LT1G	onsemi	36	225	±6%	90	50 @ 25.2V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
CMPZ5258B TR PBFREE	Central Semiconductor Corp	36	350	±5%	70	100 @ 27V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant
MMBZ5258BLT1G	onsemi	36	225	±5%	70	100 @ 27V	900 @ 10mA	-65 to 150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Recommended for Immediate Substitution):

BZX84C36-7-F (Diodes Incorporated) provides identical electrical specifications to the original part with ROHS3 compliance and active product status. This part maintains the same 300 mW power rating, ±6% tolerance, and operating temperature range. Packaging and pinout are identical, enabling direct board-level substitution without design modification.

BZX84B36-7-F (Diodes Incorporated) offers improved tolerance (±2%) while maintaining 300 mW power dissipation and identical package configuration. This part is suitable for applications requiring tighter voltage regulation.

Tier 2 - Functionally Compatible Alternatives (Suitable with Application Review):

BZX84-A36,215 and BZX84-C36,215 (Nexperia USA Inc.) are automotive-grade components with AEC-Q101 qualification. These parts operate at reduced power (250 mW) with lower reverse leakage current (50 nA). Selection is appropriate for applications where the 300 mW specification exceeds actual circuit requirements and automotive-grade reliability is beneficial.

BZX84C36LT1G (onsemi) maintains ±6% tolerance matching the original part but operates at 225 mW power dissipation. This part is suitable for designs where thermal margin is available.

CMPZ5258B TR PBFREE (Central Semiconductor Corp) provides 350 mW power capability with reduced impedance (70 Ohms). This part is appropriate for applications requiring enhanced thermal performance or lower dynamic impedance.

MMBZ5258BLT1G (onsemi) operates at 225 mW with 70 Ohms impedance and ±5% tolerance. This part is suitable for space-constrained applications where lower power dissipation is advantageous.

Tier 3 - Limited Availability (Avoid for New Designs):

BZX84B36-HE3-08 (Vishay General Semiconductor) is classified as obsolete and should not be selected for new designs despite active inventory. The reduced operating temperature minimum (-55°C) may be limiting for certain applications.

BZX84C36_R1_00001 (Panjit International Inc.) offers enhanced power capability (410 mW) but operates at reduced temperature minimum (-55°C). This part is suitable only for applications where the lower temperature bound is acceptable.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing the non-compliance status of the original BZX84C36-7. Parts selected from Tier 1 or Tier 2 categories satisfy both electrical and regulatory requirements for modern manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can BZX84C36-7-F be used as a direct replacement for BZX84C36-7?

A: Yes. BZX84C36-7-F is a direct parametric equivalent with identical electrical specifications, package configuration, and pinout. The primary difference is ROHS3 compliance and active product status. No circuit modifications are required.

Q: What is the difference between BZX84B36-7-F and BZX84C36-7-F?

A: Both parts are manufactured by Diodes Incorporated in identical SOT-23-3 packaging with 300 mW power rating. The primary difference is voltage tolerance: BZX84B36-7-F specifies ±2% tolerance compared to ±6% for BZX84C36-7-F. Selection depends on circuit requirements for voltage regulation accuracy.

Q: Are Nexperia parts (BZX84-A36,215 and BZX84-C36,215) suitable substitutes?

A: These parts are functionally compatible but operate at reduced power (250 mW versus 300 mW). They are automotive-grade with AEC-Q101 qualification and lower reverse leakage current. Substitution is appropriate if circuit thermal analysis confirms that 250 mW dissipation is sufficient. Package and pinout are identical.

Q: What is the significance of the automotive-grade designation on Nexperia parts?

A: Automotive-grade parts meet AEC-Q101 qualification standards, indicating enhanced reliability testing and stricter manufacturing controls. These parts are suitable for applications requiring automotive-level quality assurance. Non-automotive applications may use these parts without restriction.

Q: Can onsemi parts (BZX84C36LT1G and MMBZ5258BLT1G) replace the original BZX84C36-7?

A: Both onsemi parts are compatible substitutes with identical 36 V zener voltage and SOT-23-3 packaging. BZX84C36LT1G maintains ±6% tolerance matching the original part but operates at 225 mW. MMBZ5258BLT1G operates at 225 mW with ±5% tolerance and reduced impedance (70 Ohms). Substitution is appropriate if circuit thermal requirements are satisfied at reduced power levels.

Q: What is the difference between impedance values of 90 Ohms and 70 Ohms?

A: Impedance (Zzt) represents the dynamic impedance of the zener diode at specified operating conditions. Lower impedance (70 Ohms) provides better voltage regulation under transient load conditions. Parts with 70 Ohms impedance (CMPZ5258B, MMBZ5258BLT1G) are suitable for applications requiring superior transient response.

Q: Why is BZX84B36-HE3-08 listed as obsolete?

A: BZX84B36-HE3-08 is classified as obsolete by the manufacturer despite current inventory availability. Obsolete parts should not be selected for new designs due to uncertain future availability and potential manufacturing discontinuation. Active alternatives from Tier 1 or Tier 2 categories are recommended.

Q: Are there any temperature range limitations when substituting parts?

A: The original BZX84C36-7 operates from -65°C to 150°C. Most recommended substitutes maintain this range. BZX84B36-HE3-08 and BZX84C36_R1_00001 operate from -55°C to 150°C, which may be limiting for applications requiring full -65°C operation. Verify application temperature requirements before selecting these alternatives.

Q: Can CMPZ5258B TR PBFREE be used in place of BZX84C36-7?

A: Yes. CMPZ5258B TR PBFREE is functionally compatible with identical 36 V zener voltage and SOT-23-3 packaging. It provides enhanced power capability (350 mW) and lower impedance (70 Ohms). The reverse leakage measurement point differs slightly (100 nA @ 27 V versus 100 nA @ 25.2 V), which is within acceptable engineering tolerance for this component class.

Q: What packaging format should be specified when ordering substitute parts?

A: All recommended substitutes are available in SOT-23-3 surface mount packaging. Packaging format options include Tape & Reel (TR) for production quantities and Cut Tape (CT) for smaller orders. Verify packaging availability with the supplier based on procurement volume requirements.

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