DZ4J039K0R Equivalent & Substitute Parts

Part Overview

The DZ4J039K0R is a Zener Diode Array manufactured by Panasonic Electronic Components, configured as 2 independent 3.9 V devices in a 4-SMD, Flat Leads package (SMini4-F3-B). This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. The part delivers 200 mW maximum power dissipation and is suitable for surface mount applications requiring dual independent Zener protection or voltage regulation circuits.

Substiute Parts

DZ4J039K0R

Panasonic Electronic ComponentsIn Stock: 3891DZ4J039K0R Datasheet

Current PartRFQ

MMBZ5228BS-7-F

Diodes IncorporatedIn Stock: 9370MMBZ5228BS-7-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ4J039K0R is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage (Nom): 3.9 V
• Configuration: 2 Independent devices
• Power dissipation: 200 mW maximum
• Reverse leakage current: 10 µA @ 1 V
• Forward voltage: Compatible with 1 V @ 10 mA specification

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Lead configuration: Flat leads suitable for automated assembly
• Moisture sensitivity: MSL 1 (Unlimited)

The MMBZ5228BS-7-F from Diodes Incorporated satisfies all electrical parameters while maintaining the 2 independent configuration and 200 mW power rating. Although packaged in SOT-363 (6-TSSOP) rather than SMini4-F3-B, both packages are surface mount with flat leads and support equivalent circuit functionality. The substitute part is active and carries RoHS3 compliance and REACH Unaffected status, providing long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MMBZ5228BS-7-F

The MMBZ5228BS-7-F is the recommended substitute for the obsolete DZ4J039K0R. Both parts maintain identical Zener voltage (3.9 V), configuration (2 independent), power rating (200 mW), and reverse leakage specifications (10 µA @ 1 V). The substitute part is currently active with confirmed inventory availability (9300 pcs), ensuring procurement continuity.

Compliance and Certification Advantages:

The MMBZ5228BS-7-F carries RoHS3 compliance and REACH Unaffected status, providing regulatory alignment for modern manufacturing environments. Both parts share MSL 1 (Unlimited) moisture sensitivity classification, eliminating special handling requirements during assembly.

Package Transition Considerations:

The substitute transitions from SMini4-F3-B (4-SMD) to SOT-363 (6-TSSOP). Both are surface mount packages with flat leads suitable for automated pick-and-place assembly. PCB layout modifications are required to accommodate the different footprint geometry. The SOT-363 package provides improved thermal characteristics through additional lead count, potentially enhancing performance in high-dissipation applications.

Performance Differential:

The MMBZ5228BS-7-F exhibits lower impedance (23 Ohms vs. 130 Ohms) and reduced forward voltage (900 mV vs. 1 V @ 10 mA), representing improved electrical performance. These characteristics support tighter voltage regulation and reduced power loss in protection circuits. The substitute includes specified operating temperature range (-65°C ~ 150°C) and ±5% Zener voltage tolerance, providing enhanced specification clarity for design validation.

Frequently Asked Questions (FAQ)

Q: Can the MMBZ5228BS-7-F directly replace the DZ4J039K0R without circuit modification?

A: Electrical substitution is direct—both parts maintain 3.9 V Zener voltage, 2 independent configuration, 200 mW power rating, and 10 µA reverse leakage. However, PCB layout modification is required due to package footprint differences (SMini4-F3-B vs. SOT-363). Circuit functionality remains unchanged.

Q: What is the significance of the impedance difference (130 Ohms vs. 23 Ohms)?

A: Lower impedance in the substitute part (MMBZ5228BS-7-F) results in improved voltage regulation performance and reduced dynamic resistance. This provides tighter voltage stability under load transients, representing an electrical improvement over the original part.

Q: Are there any thermal or reliability concerns with the package transition?

A: The SOT-363 package (6-TSSOP) provides equivalent or superior thermal performance compared to SMini4-F3-B due to increased lead count and improved heat dissipation pathways. Both packages maintain MSL 1 (Unlimited) moisture sensitivity, eliminating special handling differences.

Q: Does the ±5% Zener voltage tolerance of the substitute affect circuit design?

A: The MMBZ5228BS-7-F specifies ±5% tolerance, while the original part tolerance is not documented. For applications requiring tighter voltage tolerance, design margins should accommodate ±5% variation. This specification provides explicit tolerance definition for the substitute part.

Q: What is the forward voltage difference (1 V vs. 900 mV) and does it impact circuit operation?

A: The substitute exhibits 100 mV lower forward voltage at 10 mA, reducing power dissipation in forward-biased conditions. This represents improved efficiency and is not detrimental to circuit operation. Circuits designed for the original 1 V specification operate within acceptable margins with the lower forward voltage.

Q: Is the MMBZ5228BS-7-F available in alternative packaging formats?

A: The MMBZ5228BS-7-F is supplied in Tape & Reel (TR) format. The base product number MMBZ5228 may be available in alternative packaging configurations through Diodes Incorporated; however, only the SOT-363 package variant is specified as equivalent to the DZ4J039K0R.

Q: What compliance certifications apply to the substitute part?

A: The MMBZ5228BS-7-F is RoHS3 Compliant and REACH Unaffected. Both certifications align with current environmental and regulatory requirements for electronic component manufacturing and distribution.