BZX84C39T-7-F Equivalent & Substitute Parts

Part Overview

The BZX84C39T-7-F is a 39 V, 150 mW Zener diode manufactured by Diodes Incorporated in SOT-523 surface mount packaging. This component is classified as Active and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1). The device operates across a temperature range of -65°C to 150°C and is suitable for voltage regulation and protection applications requiring precise 39 V reference voltage with ±5% tolerance.

Equivalent and substitute parts are identified when designs require alternative packaging formats, higher power dissipation capabilities, improved tolerance specifications, or different supplier sourcing while maintaining functional compatibility at the 39 V nominal voltage specification.

Substiute Parts

BZX84C39T-7-F

Diodes IncorporatedIn Stock: 952BZX84C39T-7-F Datasheet

Current PartRFQ

MMBZ5259BT-7-F

Diodes IncorporatedIn Stock: 1035MMBZ5259BT-7-F Datasheet

DirectRFQ

BZX84C39W-7-F

Diodes IncorporatedIn Stock: 731BZX84C39W-7-F Datasheet

MFR RecommendedRFQ

BZX84-A39,215

NXP USA Inc.In Stock: 890BZX84-A39,215 Datasheet

MFR RecommendedRFQ

BZX84-C39,215

Nexperia USA Inc.In Stock: 7548BZX84-C39,215 Datasheet

MFR RecommendedRFQ

BZX84-C39,235

NXP USA Inc.In Stock: 25830BZX84-C39,235 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX84C39T-7-F is determined by the following critical parameters that must remain constant or compatible:

Primary Substitution Criteria:

• Voltage - Zener (Nominal): 39 V (exact match required)
• Tolerance: ±5% or better (tighter tolerance acceptable)
• Power - Maximum: 150 mW or greater (equal or higher acceptable)
• Operating Temperature Range: Must encompass or match -65°C to 150°C
• Mounting Type: Surface Mount (required)
• RoHS3 Compliance: Required for regulatory compatibility

Secondary Compatibility Factors:

• Package / Case: SOT-523, SOT-323, SOT-23, or TO-236AB formats (all surface mount variants)
• Impedance (Maximum): 130 Ohms or lower (lower impedance acceptable)
• Current - Reverse Leakage: 100 nA or lower (lower leakage acceptable)
• Voltage - Forward: 900 mV @ 10 mA (standard across all variants)

Substitute parts are grouped by packaging format and power rating. Parts with identical electrical specifications but different package types are direct functional equivalents. Parts with higher power ratings or improved tolerance specifications provide enhanced performance margins while maintaining full backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Package, Same Power Rating):

MMBZ5259BT-7-F is a direct functional equivalent to BZX84C39T-7-F. Both devices are manufactured by Diodes Incorporated in SOT-523 packaging with 150 mW power rating and 39 V nominal voltage. The MMBZ5259BT-7-F exhibits superior impedance characteristics (80 Ω versus 130 Ω maximum) and maintains identical electrical performance across all critical parameters. Both devices are Active status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Enhanced Power Rating Alternatives:

BZX84C39W-7-F provides increased power dissipation capability at 200 mW within SOT-323 packaging. This device maintains the 39 V nominal voltage and ±5.13% tolerance specification. The operating temperature range is -65°C to 125°C (TJ), which is 25°C lower than the main part at the upper limit. This device is suitable for applications requiring higher thermal margin or increased power handling capacity.

BZX84-A39,215 and BZX84-C39,215 both provide 250 mW power rating in SOT-23 packaging. BZX84-A39,215 (NXP USA Inc.) offers superior ±1% tolerance specification with AEC-Q101 automotive qualification. BZX84-C39,215 (Nexperia USA Inc.) maintains ±5% tolerance with identical AEC-Q101 automotive qualification. Both devices support the full -65°C to 150°C operating temperature range.

BZX84-C39,235 (NXP USA Inc.) is functionally identical to BZX84-C39,215 with 250 mW power rating and SOT-23 packaging. This variant is available in bulk packaging format and maintains AEC-Q101 automotive qualification.

Selection Criteria by Application:

For space-constrained designs requiring minimal footprint, MMBZ5259BT-7-F in SOT-523 packaging is the optimal equivalent. For applications requiring automotive-grade components with AEC-Q101 qualification, BZX84-A39,215, BZX84-C39,215, or BZX84-C39,235 are appropriate selections. For designs with elevated thermal requirements or higher power dissipation, BZX84C39W-7-F provides enhanced performance margin.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5259BT-7-F be used as a direct replacement for BZX84C39T-7-F?

A: Yes. Both devices are 39 V, 150 mW Zener diodes in SOT-523 surface mount packaging manufactured by Diodes Incorporated. Electrical specifications are identical with the exception of impedance (MMBZ5259BT-7-F: 80 Ω maximum versus BZX84C39T-7-F: 130 Ω maximum), which represents improved performance. Both maintain RoHS3 compliance and unlimited moisture sensitivity rating.

Q: What is the primary difference between BZX84C39W-7-F and BZX84C39T-7-F?

A: BZX84C39W-7-F provides 200 mW power rating compared to 150 mW for BZX84C39T-7-F. The package format differs (SOT-323 versus SOT-523). The maximum operating temperature is reduced to 125°C (TJ) from 150°C. This device is suitable for applications requiring higher power dissipation capability.

Q: Are the automotive-grade variants (BZX84-A39,215 and BZX84-C39,215) compatible with the standard BZX84C39T-7-F?

A: Yes. Both automotive variants maintain the 39 V nominal voltage specification and support the full -65°C to 150°C operating temperature range. The primary differences are higher power rating (250 mW versus 150 mW), different package format (SOT-23 versus SOT-523), and AEC-Q101 automotive qualification. These variants provide enhanced performance margins and are suitable for automotive applications.

Q: What is the significance of the ±1% tolerance specification in BZX84-A39,215?

A: The ±1% tolerance specification provides tighter voltage regulation accuracy compared to the ±5% tolerance of the main part. This enhanced precision is beneficial for applications requiring strict voltage reference accuracy. The ±1% tolerance is a superior specification that maintains full backward compatibility.

Q: Can BZX84-C39,235 be substituted for BZX84-C39,215?

A: Yes. Both devices are functionally identical 39 V, 250 mW Zener diodes in SOT-23 packaging manufactured by NXP USA Inc. with AEC-Q101 automotive qualification. The primary difference is packaging format (bulk versus tape & reel). Electrical specifications and performance characteristics are identical.

Q: What packaging considerations apply when selecting a substitute part?

A: The main part BZX84C39T-7-F uses SOT-523 packaging. Substitute parts are available in SOT-523 (MMBZ5259BT-7-F), SOT-323 (BZX84C39W-7-F), and SOT-23 (BZX84-A39,215, BZX84-C39,215, BZX84-C39,235) formats. PCB layout and footprint compatibility must be verified before substitution. All variants are surface mount devices.

Q: Are all substitute parts RoHS3 compliant?

A: BZX84C39T-7-F, MMBZ5259BT-7-F, BZX84C39W-7-F, and BZX84-C39,215 are explicitly specified as ROHS3 Compliant. BZX84-A39,215 and BZX84-C39,235 do not have RoHS status specified in the provided data. Verification with the manufacturer is required for these variants if RoHS3 compliance is a design requirement.

Q: What is the moisture sensitivity level for all substitute parts?

A: BZX84C39T-7-F, MMBZ5259BT-7-F, BZX84C39W-7-F, and BZX84-C39,215 are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. BZX84-A39,215 and BZX84-C39,235 do not have moisture sensitivity level specified in the provided data.