BZX584C39-V-G-08 Equivalent & Substitute Parts

Part Overview

The BZX584C39-V-G-08 is a 39 V Zener diode rated for 200 mW maximum 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 current inventory availability, equivalent substitute parts from active manufacturers are necessary to ensure design continuity and long-term supply chain reliability.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	39 V
Tolerance	±5%
Power - Max	200 mW
Impedance (Max)	130 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 27.3 V
Operating Temperature Range	-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 eligibility for the BZX584C39-V-G-08 is determined by the following critical parameters:

Mandatory Matching Parameters:

Zener voltage: 39 V nominal
Package type: SOD-523 surface mount
Operating temperature range: -65°C to 150°C minimum
RoHS3 compliance
Impedance (Max): 130 Ohms

Allowable Variation Parameters:

Power rating: Equal to or greater than 200 mW
Tolerance: ±5% or tighter
Reverse leakage current: Equal to or less than 50 nA @ reference voltage

Substitute parts must maintain electrical equivalence at the 39 V zener voltage specification while accommodating higher power dissipation ratings, which provide enhanced thermal margin and design flexibility. All substitute parts listed are active products from established manufacturers with current inventory availability.

Parameter Comparison

Parameter	BZX584C39-V-G-08	BZT585B39T-7	CMOZ39V TR PBFREE	BZT52C39T-TP	DDZ9716T-7
Manufacturer	Vishay	Diodes Inc	Central Semiconductor	Micro Commercial Co	Diodes Inc
Voltage - Zener (Nom)	39 V	39 V	39 V	39 V	39 V
Tolerance	±5%	±2%	±5%	±5%	±5%
Power - Max	200 mW	350 mW	300 mW	100 mW	150 mW
Impedance (Max)	130 Ohms	130 Ohms	130 Ohms	130 Ohms	Not specified
Current - Reverse Leakage @ Vr	50 nA @ 27.3 V	50 nA @ 27.3 V	50 nA @ 27.3 V	100 nA @ 27.3 V	50 nA @ 29.6 V
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: BZT585B39T-7 (Diodes Incorporated)

The BZT585B39T-7 is the optimal substitute for the BZX584C39-V-G-08. This part maintains identical zener voltage (39 V), impedance (130 Ohms), and reverse leakage specifications while providing 350 mW power rating—exceeding the original 200 mW specification. The tighter tolerance (±2% versus ±5%) provides improved voltage regulation accuracy. The part is active with substantial inventory availability (24,200 units) and carries full ROHS3 compliance.

Secondary Substitute: CMOZ39V TR PBFREE (Central Semiconductor Corp)

The CMOZ39V TR PBFREE provides 300 mW power rating with matching zener voltage and impedance. Tolerance and reverse leakage specifications are equivalent to the original part. This option offers a mid-range power rating with active product status and 11,989 units in stock.

Alternative Substitute: DDZ9716T-7 (Diodes Incorporated)

The DDZ9716T-7 provides 150 mW power rating, which is below the original 200 mW specification but maintains all other critical electrical parameters. This part is suitable only for applications where power dissipation does not exceed 150 mW. The part is active with 45,400 units in inventory.

Not Recommended: BZT52C39T-TP (Micro Commercial Co)

The BZT52C39T-TP provides only 100 mW power rating, which is insufficient for applications requiring the full 200 mW capability of the original part. This part is suitable only for reduced-power applications.

Not Recommended: CZRU52C39 and CZRUR52C39 (Comchip Technology)

These parts use a different package format (0603/SOD-523F) and have a reduced operating temperature range (-55°C to 125°C), which does not meet the original specification of -65°C to 150°C. These parts are not direct substitutes for the BZX584C39-V-G-08.

Frequently Asked Questions (FAQ)

Q: Can the BZT585B39T-7 be used as a direct replacement for the BZX584C39-V-G-08?

A: Yes. The BZT585B39T-7 maintains identical zener voltage (39 V), impedance (130 Ohms), reverse leakage current, and operating temperature range. The higher power rating (350 mW versus 200 mW) provides additional thermal margin and is electrically compatible. Both parts use the SOD-523 package.

Q: What is the difference between the substitute parts in terms of power rating?

A: The substitute parts offer varying power dissipation capabilities: BZT585B39T-7 (350 mW), CMOZ39V TR PBFREE (300 mW), DDZ9716T-7 (150 mW), and BZT52C39T-TP (100 mW). Higher power ratings provide greater thermal headroom but do not affect electrical performance at nominal operating conditions. Selection depends on the actual power dissipation requirements of the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original BZX584C39-V-G-08 specification.

Q: Why are CZRU52C39 and CZRUR52C39 not recommended as direct substitutes?

A: These parts use a different package format (0603/SOD-523F versus SC-79/SOD-523) and have a reduced operating temperature range (-55°C to 125°C versus -65°C to 150°C). They do not meet the full environmental specifications of the original part.

Q: What is the significance of the ±2% tolerance on the BZT585B39T-7?

A: The ±2% tolerance on the BZT585B39T-7 provides tighter voltage regulation compared to the ±5% tolerance of the original part. This results in more precise zener voltage control, which may improve circuit performance in voltage regulation applications.

Q: Can BZT52C39T-TP be used in place of the BZX584C39-V-G-08?

A: The BZT52C39T-TP is not suitable as a direct replacement. Its 100 mW power rating is insufficient for applications requiring the full 200 mW capability of the original part. Use this part only in applications where power dissipation does not exceed 100 mW.

Q: What inventory considerations should be evaluated when selecting a substitute?

A: Current inventory availability varies significantly among substitute parts. BZT585B39T-7 has the highest availability (24,200 units), followed by DDZ9716T-7 (45,400 units), CMOZ39V TR PBFREE (11,989 units), BZT52C39T-TP (4,896 units), CZRU52C39 (1,052 units), and CZRUR52C39 (823 units). For long-term supply chain planning, parts with higher inventory and active product status are preferred.

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