MM5Z47V Zener Diode Equivalent & Substitute Parts

Part Overview

The MM5Z47V is a 47 V zener diode rated for 200 mW power dissipation in a surface mount SOD-523F package, manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part maintains a nominal zener voltage of 47 V with ±6% tolerance and operates across a temperature range of -55°C to 150°C. Substitute parts are selected based on matching zener voltage, tolerance specifications, power rating compatibility, and surface mount packaging standards.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	47	V
Tolerance	±6%	-
Power - Max	200	mW
Impedance (Max)	170	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 32.9 V
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-523F	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the MM5Z47V is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 47 V nominal
Tolerance: ±6% or tighter
Power rating: 200 mW or greater
Surface mount configuration
Reverse leakage current: 50 nA @ 32.9 V or lower
Operating temperature range: -55°C to 150°C minimum

Substitution Logic: Substitute parts are grouped into three categories based on package type and power rating:

Direct Package Substitutes (SOD-523 variants): Parts maintaining the same or compatible package footprint with equal or higher power ratings
Alternate Package Substitutes (SOT-23-3, SOD-123F, SOD-323F): Parts with different surface mount packages but equivalent electrical performance and higher power ratings
Electrical Equivalents: Parts meeting all electrical specifications with active product status and modern compliance certifications

All substitute parts maintain the 47 V zener voltage specification and operate within the required temperature range. Power ratings of substitute parts equal or exceed the original 200 mW specification, ensuring thermal compatibility in existing circuit designs.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Temp Range	Package	Status
MM5Z47V	onsemi	47 V	±6%	200 mW	170 Ω	50 nA @ 32.9 V	-55 to 150°C	SOD-523F	Obsolete
BZX84C47LT1G	onsemi	47 V	±6%	225 mW	170 Ω	50 nA @ 32.9 V	-65 to 150°C	SOT-23-3	Active
BZT52H-C47,115	Nexperia USA Inc.	47 V	±5%	375 mW	90 Ω	50 nA @ 32.9 V	-65 to 150°C	SOD-123F	Active
BZX584C47_R1_00001	Panjit International Inc.	47 V	±5%	200 mW	170 Ω	100 nA @ 32.9 V	-55 to 150°C	SOD-523	Active
BZX585-B47,115	Nexperia USA Inc.	47 V	±2%	300 mW	170 Ω	50 nA @ 32.9 V	-65 to 150°C	SOD-523	Active
BZX585-C47,115	Nexperia USA Inc.	47 V	±5%	300 mW	170 Ω	50 nA @ 32.9 V	-65 to 150°C	SOD-523	Active
BZX84J-C47,115	Nexperia USA Inc.	47 V	±5%	550 mW	90 Ω	50 nA @ 32.9 V	-65 to 150°C	SOD-323F	Active

Engineering Selection Recommendations

For Direct Replacement (Same Package Footprint):

BZX584C47_R1_00001 (Panjit International Inc.) provides the closest electrical match to MM5Z47V with identical 200 mW power rating and SOD-523 package compatibility. This part maintains the same operating temperature range (-55°C to 150°C) and impedance specification (170 Ω). The part is currently active with ROHS3 compliance and AEC-Q100 qualification status.

BZX585-B47,115 and BZX585-C47,115 (Nexperia USA Inc.) offer enhanced specifications with 300 mW power ratings in SOD-523 packaging. Both parts feature active product status, automotive-grade qualification (AEC-Q100), and extended temperature range (-65°C to 150°C). BZX585-B47,115 provides tighter tolerance (±2%) while BZX585-C47,115 matches the original ±5% tolerance specification.

For Higher Power Applications:

BZX84J-C47,115 (Nexperia USA Inc.) delivers 550 mW power dissipation in SOD-323F package with automotive qualification (AEC-Q101). This part accommodates designs requiring increased thermal headroom with lower impedance (90 Ω) and extended temperature range (-65°C to 150°C).

BZT52H-C47,115 (Nexperia USA Inc.) provides 375 mW power rating in SOD-123F package with automotive-grade qualification (AEC-Q101) and ±5% tolerance matching the original specification.

For Alternative Packaging:

BZX84C47LT1G (onsemi) offers 225 mW power rating in SOT-23-3 package with ±6% tolerance identical to the original part. This substitute maintains onsemi manufacturer continuity and active product status with extended temperature range (-65°C to 150°C).

All recommended substitutes maintain REACH compliance, EAR99 export classification, and unlimited moisture sensitivity level (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can BZX584C47_R1_00001 directly replace MM5Z47V in existing PCB designs?

A: Yes. BZX584C47_R1_00001 maintains identical 200 mW power rating, 47 V zener voltage, and SOD-523 package footprint. The part operates across the same temperature range (-55°C to 150°C) with matching impedance (170 Ω). Reverse leakage current is slightly higher (100 nA vs. 50 nA @ 32.9 V), which does not affect circuit functionality in standard applications.

Q: What is the advantage of BZX585-B47,115 over BZX584C47_R1_00001?

A: BZX585-B47,115 provides 300 mW power rating (50% higher than the original 200 mW), tighter tolerance (±2% vs. ±6%), automotive-grade qualification (AEC-Q100), and extended temperature range (-65°C to 150°C). These specifications enhance reliability and thermal margin in demanding applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification. The original MM5Z47V does not specify RoHS status, but all active alternatives meet current RoHS requirements.

Q: Can BZX84C47LT1G be used as a drop-in replacement despite different packaging?

A: BZX84C47LT1G uses SOT-23-3 package instead of SOD-523F, requiring PCB layout modification. The part is electrically compatible with ±6% tolerance matching the original specification and 225 mW power rating. Footprint redesign is necessary for implementation.

Q: Which substitute part offers the best thermal performance?

A: BZX84J-C47,115 provides the highest power rating (550 mW) with lowest impedance (90 Ω) in SOD-323F package. This configuration delivers superior thermal performance for applications requiring maximum power dissipation capability.

Q: Do all substitute parts maintain the 47 V zener voltage specification?

A: Yes. All substitute parts maintain 47 V nominal zener voltage. Tolerance specifications vary from ±2% to ±5%, all tighter than or equal to the original ±6% specification.

Q: What is the difference between BZX585-B47,115 and BZX585-C47,115?

A: Both parts share identical 300 mW power rating, SOD-523 package, and automotive qualification (AEC-Q100). The primary difference is tolerance: BZX585-B47,115 specifies ±2% tolerance while BZX585-C47,115 specifies ±5% tolerance. Selection depends on circuit voltage regulation requirements.

Q: Are substitute parts available in the same packaging format (Tape & Reel)?

A: Yes. All substitute parts are available in Tape & Reel (TR) packaging format suitable for automated assembly processes. Inventory availability ranges from 816 to 4120 pieces across the substitute part list.

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