MM3Z5V6ST1 Equivalent & Substitute Parts

Part Overview

The MM3Z5V6ST1 is a Zener diode rated at 5.6 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-323 package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, equivalent substitute parts with active product status and improved specifications are available to support ongoing design requirements and procurement needs.

Substiute Parts

MM3Z5V6ST1

onsemiIn Stock: 782MM3Z5V6ST1 Datasheet

Current PartRFQ

MM3Z5V6ST1G

onsemiIn Stock: 71878MM3Z5V6ST1G Datasheet

DirectRFQ

BZX384-B5V6,115

Nexperia USA Inc.In Stock: 81993BZX384-B5V6,115 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM3Z5V6ST1 are selected based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Matching Parameters:

• Zener voltage: 5.6 V nominal
• Tolerance: ±2%
• Impedance (Max): 40 Ohms
• Reverse leakage current: 1 µA @ 2 V
• Operating temperature range: -65°C ~ 150°C
• Package type: SOD-323 (SC-76)
• Mounting type: Surface Mount

Allowable Variation:

• Power rating: Substitute parts may exceed the 200 mW specification of the original part, provided all other electrical characteristics remain within tolerance
• Forward voltage: Minor variations in forward voltage characteristics are acceptable within the specified test conditions

The MM3Z5V6ST1G (onsemi) and BZX384-B5V6,115 (Nexperia USA Inc.) both satisfy these criteria with identical zener voltage, tolerance, impedance, and package specifications. Both substitute parts feature 300 mW power ratings, representing an increase from the original 200 mW specification.

Parameter Comparison

Engineering Selection Recommendations

MM3Z5V6ST1G (onsemi): This part is the direct manufacturer equivalent with active product status. It maintains identical electrical specifications to the original MM3Z5V6ST1 while offering increased power dissipation capability (300 mW versus 200 mW). The MM3Z5V6ST1G achieves ROHS3 compliance, addressing regulatory requirements that the original part does not meet. This substitute is recommended for new designs and ongoing production requiring onsemi sourcing.

BZX384-B5V6,115 (Nexperia USA Inc.): This part provides cross-manufacturer substitution with active product status and ROHS3 compliance. Electrical parameters match the original specification with the exception of forward voltage characteristics measured at a different test condition (1.1 V @ 100 mA versus 900 mV @ 10 mA). The BZX384-B5V6,115 offers supply chain diversification and is suitable for applications where multi-source qualification is required.

Both substitute parts support the same operating temperature range and package footprint as the original MM3Z5V6ST1, ensuring mechanical and thermal compatibility in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can MM3Z5V6ST1G be used as a direct replacement for MM3Z5V6ST1?

A: Yes. The MM3Z5V6ST1G maintains identical zener voltage (5.6 V), tolerance (±2%), impedance (40 Ohms), reverse leakage current (1 µA @ 2 V), and operating temperature range (-65°C ~ 150°C). The increased power rating (300 mW versus 200 mW) is compatible with applications designed for the original 200 mW part. Both parts use the SOD-323 package with identical pinout and footprint.

Q: What is the difference between MM3Z5V6ST1 and MM3Z5V6ST1G?

A: The primary differences are product status and power rating. MM3Z5V6ST1 is obsolete with 200 mW maximum power, while MM3Z5V6ST1G is active with 300 mW maximum power. MM3Z5V6ST1G also achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. All critical electrical parameters remain identical.

Q: Can BZX384-B5V6,115 replace MM3Z5V6ST1 in existing designs?

A: Yes. The BZX384-B5V6,115 provides equivalent zener voltage, tolerance, impedance, reverse leakage, and operating temperature specifications. The SOD-323 package ensures mechanical compatibility. The forward voltage specification is measured at different test conditions but does not affect zener diode operation in voltage regulation applications. This part is suitable for designs requiring cross-manufacturer qualification.

Q: Why do the substitute parts have higher power ratings?

A: The MM3Z5V6ST1G and BZX384-B5V6,115 both feature 300 mW power dissipation compared to the original 200 mW specification. Higher power ratings provide additional thermal margin and do not negatively impact circuit performance. Applications designed for 200 mW operation remain fully compatible with 300 mW parts.

Q: Are there packaging differences between these parts?

A: All three parts use the SOD-323 package (SC-76). MM3Z5V6ST1 and MM3Z5V6ST1G differ in packaging format (standard versus Cut Tape & Digi-Reel), but the component package itself is identical. BZX384-B5V6,115 is supplied in Tape & Reel format. These packaging differences affect procurement and handling but not circuit compatibility.

Q: What is the significance of RoHS compliance for these parts?

A: MM3Z5V6ST1 is RoHS non-compliant, while both MM3Z5V6ST1G and BZX384-B5V6,115 are ROHS3 compliant. RoHS compliance is required for products sold into regulated markets and for manufacturers subject to environmental directives. If your application or supply chain requires RoHS compliance, substitute parts must be selected accordingly.

Q: Can these parts be used interchangeably in the same PCB design?

A: Yes. All three parts share identical SOD-323 package dimensions and pinout. PCB footprints designed for MM3Z5V6ST1 accommodate MM3Z5V6ST1G and BZX384-B5V6,115 without modification. Electrical performance in voltage regulation circuits remains equivalent across all three parts.