MMSZ5239C-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5239C-TP is a 9.1 V, 500 mW Zener diode manufactured by Micro Commercial Co, designed for interface applications in surface mount configurations. This component operates across a temperature range of -55°C to 150°C and is housed in an SOD-123 package. The part maintains Active product status with REACH compliance and is currently in stock with 755 units available.

Equivalent and substitute parts are identified based on matching electrical specifications including nominal Zener voltage, power dissipation capability, package type, and operating temperature range. Substitutes enable design flexibility, support supply chain continuity, and provide alternative sourcing options when the primary part becomes unavailable.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	9.1	V
Tolerance	±2%	-
Power - Max	500	mW
Impedance (Max)	10	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 6.5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-123	-

Substitute Part Grouping Explanation

Substitution eligibility for the MMSZ5239C-TP is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage of 9.1 V
Surface mount package type (SOD-123 or compatible)
Operating temperature range compatibility (-55°C to 150°C minimum)
Power dissipation capability of 500 mW or greater

Secondary Compatibility Factors:

Zener voltage tolerance (±2% to ±6% acceptable)
Impedance maximum rating (10 to 15 Ohms acceptable)
Reverse leakage current specifications
Forward voltage characteristics

Parts are grouped into two categories based on substitution suitability:

Category A - Direct Substitutes (Identical Power Rating): Parts with 500 mW power dissipation in SOD-123 package maintain full electrical equivalence with the MMSZ5239C-TP.

Category B - Functional Substitutes (Reduced Power Rating): Parts with 300-410 mW power dissipation in SOD-123 package provide functional equivalence for applications not requiring the full 500 mW capability.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Temp Range	Status
MMSZ5239C-TP	Micro Commercial Co	9.1 V	±2%	500 mW	10 Ω	SOD-123	-55 to 150°C	Active
BZT52B9V1-E3-08	Vishay General Semiconductor	9.1 V	±2%	410 mW	10 Ω	SOD-123	-55 to 150°C	Active
BZT52C9V1-E3-08	Vishay General Semiconductor	9.1 V	±5%	410 mW	10 Ω	SOD-123	-55 to 150°C	Active
BZT52C9V1-G3-18	Vishay General Semiconductor	9.1 V	±5%	410 mW	10 Ω	SOD-123	-55 to 150°C	Active
BZT52C9V1T-7	Diodes Incorporated	9.1 V	±6%	300 mW	15 Ω	SOD-523	-65 to 150°C	Active
DDZ9696Q-7	Diodes Incorporated	9.1 V	±5%	500 mW	-	SOD-123	-65 to 150°C	Active
MMSZ4696-E3-08	Vishay General Semiconductor	9.1 V	±5%	500 mW	-	SOD-123	-55 to 150°C	Active
MMSZ5239BT1G	onsemi	9.1 V	±5%	500 mW	10 Ω	SOD-123	-55 to 150°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (500 mW, SOD-123):

The following parts provide direct substitution with identical power dissipation and package specifications:

DDZ9696Q-7 (Diodes Incorporated): Maintains 500 mW rating with SOD-123 package. Includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C). RoHS3 compliant.
MMSZ4696-E3-08 (Vishay General Semiconductor): Maintains 500 mW rating with SOD-123 package and matching temperature range. RoHS3 compliant with MSL 1 rating.
MMSZ5239BT1G (onsemi): Maintains 500 mW rating with SOD-123 package. Part of the MMSZ52xxxT1G series with RoHS3 compliance and MSL 1 rating.

Functional Substitutes (410 mW, SOD-123):

The following parts provide functional substitution with reduced power dissipation:

BZT52B9V1-E3-08 (Vishay General Semiconductor): Maintains ±2% tolerance matching the primary part with 410 mW rating. RoHS3 compliant with MSL 1 rating.
BZT52C9V1-E3-08 (Vishay General Semiconductor): Provides 410 mW rating with ±5% tolerance. RoHS3 compliant with MSL 1 rating and higher inventory availability (25,682 units).
BZT52C9V1-G3-18 (Vishay General Semiconductor): Provides 410 mW rating with ±5% tolerance in BZT52-G series. RoHS3 compliant with MSL 1 rating.

Limited Substitution (300 mW, SOD-523):

BZT52C9V1T-7 (Diodes Incorporated): Operates in SOD-523 package with reduced 300 mW power rating and increased impedance (15 Ω). Extended temperature range (-65°C to 150°C). Suitable only for applications with lower power requirements.

All substitute parts maintain Active product status, REACH compliance, and RoHS3 certification where applicable.

Frequently Asked Questions (FAQ)

Q: Can BZT52C9V1-E3-08 replace MMSZ5239C-TP directly?

A: BZT52C9V1-E3-08 is functionally compatible with MMSZ5239C-TP for applications not requiring the full 500 mW power dissipation. Both parts share identical 9.1 V nominal voltage, SOD-123 package, and -55°C to 150°C operating range. The substitute has 410 mW maximum power versus 500 mW for the primary part. Tolerance differs at ±5% versus ±2%.

Q: What is the difference between BZT52B9V1-E3-08 and BZT52C9V1-E3-08?

A: Both parts are manufactured by Vishay and share identical electrical specifications except for Zener voltage tolerance. BZT52B9V1-E3-08 maintains ±2% tolerance matching the MMSZ5239C-TP primary part. BZT52C9V1-E3-08 has ±5% tolerance. Both provide 410 mW power dissipation in SOD-123 package.

Q: Why does DDZ9696Q-7 have automotive qualification?

A: DDZ9696Q-7 is qualified to AEC-Q101 automotive standards and carries automotive grade designation. This qualification indicates the part meets automotive industry reliability and performance requirements. The part maintains 500 mW power rating and SOD-123 package matching the primary MMSZ5239C-TP.

Q: Is BZT52C9V1T-7 suitable as a substitute?

A: BZT52C9V1T-7 provides functional substitution only for applications with power requirements below 300 mW. The part uses SOD-523 package instead of SOD-123, has increased impedance (15 Ω versus 10 Ω), and reduced power rating (300 mW versus 500 mW). Extended temperature range (-65°C to 150°C) provides additional margin.

Q: What packaging differences exist among substitute parts?

A: All substitute parts except BZT52C9V1T-7 use SOD-123 package matching the primary MMSZ5239C-TP. BZT52C9V1T-7 uses SOD-523 package, which is physically different and requires PCB layout modification. Tape & Reel (TR) packaging is standard for all substitutes, whereas the primary part is supplied in Bulk packaging.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed maintain RoHS3 compliance. The primary MMSZ5239C-TP does not specify RoHS status. All substitutes carry MSL 1 (Unlimited) moisture sensitivity level rating.

Q: Which substitute offers the best inventory availability?

A: BZT52C9V1-E3-08 provides the highest inventory availability with 25,682 units in stock, followed by MMSZ5239BT1G with 35,100 units. MMSZ4696-E3-08 has 18,300 units available. DDZ9696Q-7 has the lowest availability at 1,087 units.

Q: Can MMSZ5239BT1G replace MMSZ5239C-TP?

A: MMSZ5239BT1G is a direct electrical equivalent with identical 9.1 V nominal voltage, 500 mW power rating, 10 Ω impedance, and SOD-123 package. Both parts share -55°C to 150°C operating range. The substitute has ±5% tolerance versus ±2% for the primary part. MMSZ5239BT1G is part of the onsemi MMSZ52xxxT1G series with RoHS3 compliance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message