MMSZ5238B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5238B-TP is an 8.7 V, 500 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-123 packaging. This component is classified as Active and is in current production. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to ensure functional equivalence in circuit applications requiring precision voltage regulation or transient protection.

Substiute Parts

MMSZ5238B-TP

Micro Commercial CoIn Stock: 1129MMSZ5238B-TP Datasheet

Current PartRFQ

MMSZ5238BT1G

onsemiIn Stock: 3391MMSZ5238BT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMSZ5238B-TP are identified through direct equivalence of the following critical parameters:

• Zener Voltage (Vz): 8.7 V nominal with ±5% tolerance
• Power Dissipation: 500 mW maximum rating
• Impedance (Zzt): 8 Ohms maximum
• Reverse Leakage Current: 3 µA @ 6.5 V
• Operating Temperature Range: -55°C to 150°C
• Package Type: SOD-123 surface mount
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The MMSZ5238BT1G from onsemi meets all specified electrical and mechanical parameters, confirming direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

The MMSZ5238BT1G from onsemi is a direct functional equivalent to the MMSZ5238B-TP. Both components are Active products with identical electrical specifications, mechanical packaging, and regulatory compliance status. Selection between these parts may be based on:

• Availability: MMSZ5238BT1G currently has 3300 units in stock versus 1083 units for MMSZ5238B-TP
• Manufacturer Preference: Design specifications may require a specific manufacturer designation
• Supply Chain Continuity: Either part maintains equivalent performance in circuit applications
• Regulatory Requirements: Both parts satisfy ROHS3, REACH, and EAR99 classifications

No electrical or mechanical redesign is required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5238BT1G replace MMSZ5238B-TP in existing designs?

A: Yes. Both parts share identical zener voltage (8.7 V), power rating (500 mW), impedance (8 Ohms), reverse leakage current (3 µA @ 6.5 V), operating temperature range (-55°C to 150°C), and SOD-123 package specifications. No circuit modifications are required.

Q: Are there differences in forward voltage characteristics?

A: The MMSZ5238BT1G datasheet specifies forward voltage (Vf) of 900 mV @ 10 mA. This parameter is not provided for the MMSZ5238B-TP in the available documentation. Both parts operate identically in reverse-biased zener regulation applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both MMSZ5238B-TP and MMSZ5238BT1G are ROHS3 Compliant, REACH Unaffected, and classified as EAR99. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: Is the SOD-123 package identical between manufacturers?

A: Yes. Both parts use the SOD-123 surface mount package with identical mechanical dimensions and land pattern requirements. PCB layout and reflow soldering parameters remain unchanged.

Q: What is the tolerance specification for zener voltage?

A: Both parts maintain ±5% tolerance on the 8.7 V nominal zener voltage, resulting in an operating range of 8.265 V to 9.135 V.