BZX584C15-V-G-08 Equivalent & Substitute Parts

Part Overview

The BZX584C15-V-G-08 is a 15 V Zener diode rated for 200 mW power dissipation in a surface mount SOD-523 package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary to maintain design continuity and ensure long-term supply chain reliability for new production and redesign efforts.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Tolerance	±5%	—
Power - Max	200	mW
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 8 V	—
Operating Temperature	-65°C ~ 150°C	—
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BZX584C15-V-G-08 is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 15 V nominal
Package type: SOD-523 surface mount (or equivalent 0603/SOD-523F)
Mounting type: Surface mount
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Factors:

Power rating: 200 mW or higher
Tolerance: ±5% or ±6%
Operating temperature range: -65°C to 150°C (or subset thereof)
Reverse leakage current: 100 nA or lower at specified voltage

Substitute parts are grouped into two categories based on package compatibility:

Category 1: SOD-523 Package Direct Substitutes Parts maintaining the exact SOD-523 package footprint with 15 V zener voltage and surface mount configuration.

Category 2: 0603/SOD-523F Package Alternatives Parts with equivalent electrical performance but utilizing 0603 SMD package format, suitable for designs with flexible footprint requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Impedance Max	Reverse Leakage	Temp Range	Package	Status
BZX584C15-V-G-08	Vishay	15 V	±5%	200 mW	30 Ω	100 nA @ 8 V	-65°C ~ 150°C	SOD-523	Obsolete
BZX584C15-G3-08	Vishay	15 V	±5%	200 mW	10 Ω	100 nA @ 8 V	-65°C ~ 150°C	SOD-523	Active
BZT52C15T-7	Diodes Incorporated	15 V	±6%	300 mW	30 Ω	100 nA @ 10.5 V	-65°C ~ 150°C	SOD-523	Active
BZT52C15T-TP	Micro Commercial Co	15 V	±6%	100 mW	30 Ω	100 nA @ 10.5 V	-65°C ~ 150°C	SOD-523	Active
CZRU52C15	Comchip Technology	15 V	±5%	150 mW	30 Ω	100 nA @ 11 V	-55°C ~ 125°C	0603/SOD-523F	Active
CZRUR52C15	Comchip Technology	15 V	±5%	150 mW	30 Ω	100 nA @ 11 V	-55°C ~ 125°C	0603/SOD-523F	Active
DDZ9702T-7	Diodes Incorporated	15 V	±5%	150 mW	Not specified	50 nA @ 11.4 V	-65°C ~ 150°C	SOD-523	Active

Engineering Selection Recommendations

Primary Recommendation: BZX584C15-G3-08

The BZX584C15-G3-08 is the direct equivalent from the same manufacturer (Vishay). It maintains identical zener voltage (15 V), tolerance (±5%), power rating (200 mW), and operating temperature range (-65°C to 150°C). The part is active with substantial inventory availability (11,757 pcs). The lower impedance specification (10 Ω vs. 30 Ω) represents an improvement in performance characteristics. This part is ROHS3 compliant and MSL 1 rated, matching the original specification.

Secondary Recommendation: BZT52C15T-7

The BZT52C15T-7 from Diodes Incorporated is an active part with higher power rating (300 mW), providing design margin above the original 200 mW specification. It maintains the 15 V zener voltage, SOD-523 package, and full operating temperature range (-65°C to 150°C). Tolerance is ±6% versus the original ±5%. Inventory availability is excellent (142,087 pcs). ROHS3 and MSL 1 compliance are confirmed.

Alternative for Power-Constrained Applications: BZT52C15T-TP

The BZT52C15T-TP from Micro Commercial Co is suitable for applications where the 200 mW power rating exceeds circuit requirements. It provides 100 mW rating with identical 15 V zener voltage and SOD-523 package. Full temperature range (-65°C to 150°C) is supported. This part is active with high inventory (31,398 pcs) and maintains ROHS3 and MSL 1 compliance.

Package-Alternative Options: CZRU52C15 and CZRUR52C15

Both Comchip Technology parts (CZRU52C15 and CZRUR52C15) provide 15 V zener voltage with ±5% tolerance in 0603/SOD-523F package format. Power rating is 150 mW. Operating temperature range is -55°C to 125°C, which is narrower than the original specification. These parts are suitable only for designs where the reduced temperature range is acceptable and where 0603 package footprint is compatible. Both are active with ROHS3 and MSL 1 compliance.

Lower-Power Alternative: DDZ9702T-7

The DDZ9702T-7 from Diodes Incorporated offers 150 mW power rating with 15 V zener voltage and ±5% tolerance in SOD-523 package. Operating temperature range matches the original (-65°C to 150°C). Reverse leakage is lower (50 nA @ 11.4 V). This part is active with ROHS3 and MSL 1 compliance. Inventory is available (3,300 pcs).

Frequently Asked Questions (FAQ)

Q: Can BZX584C15-G3-08 be used as a direct replacement for BZX584C15-V-G-08?

A: Yes. Both parts are manufactured by Vishay with identical zener voltage (15 V), tolerance (±5%), power rating (200 mW), and operating temperature range (-65°C to 150°C). The BZX584C15-G3-08 is active and widely available. The lower impedance specification (10 Ω) is a performance improvement.

Q: What is the difference between SOD-523 and 0603/SOD-523F packages?

A: SOD-523 and 0603/SOD-523F are equivalent package designations for the same physical form factor. The CZRU52C15 and CZRUR52C15 parts use this package type. Footprint compatibility depends on PCB design. Verify package dimensions against your design requirements before selection.

Q: Can I use BZT52C15T-7 (300 mW) instead of the 200 mW original part?

A: Yes. Higher power rating provides design margin and does not create compatibility issues. The 300 mW rating ensures the part operates within safe limits under the same circuit conditions. All other electrical parameters (15 V zener voltage, SOD-523 package, temperature range) are compatible.

Q: Are the Comchip parts (CZRU52C15, CZRUR52C15) suitable for all applications?

A: These parts are suitable only for applications where the operating temperature range of -55°C to 125°C is acceptable. The original part specification is -65°C to 150°C. If your circuit requires operation below -55°C or above 125°C, select an alternative with the full temperature range (BZX584C15-G3-08, BZT52C15T-7, or DDZ9702T-7).

Q: What is the significance of the ±6% tolerance in BZT52C15T-7 versus ±5% in the original?

A: The ±6% tolerance is slightly wider than the original ±5%. For a 15 V zener, this represents a maximum deviation of ±0.9 V versus ±0.75 V. Verify that your circuit design accommodates this tolerance range. If tighter tolerance is required, select BZX584C15-G3-08, CZRU52C15, CZRUR52C15, or DDZ9702T-7, all rated at ±5%.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference. BZT52C15T-7 has the highest availability (142,087 pcs), followed by BZT52C15T-TP (31,398 pcs) and BZX584C15-G3-08 (11,757 pcs). For long-term supply chain planning, active parts with substantial inventory are preferred over obsolete parts.

Q: Do all substitute parts meet RoHS3 and MSL 1 requirements?

A: Yes. All substitute parts listed are ROHS3 compliant and rated MSL 1 (Unlimited moisture sensitivity level), matching the original part specification.

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