MMSZ5260B-TP Equivalent & Substitute Parts

Part Overview

The MMSZ5260B-TP is a Zener diode manufactured by Micro Commercial Co, rated at 43 V nominal voltage with 500 mW maximum power dissipation in a surface mount SOD-123 package. This component is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified to provide design flexibility, supply chain alternatives, and packaging options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	43	V
Tolerance	±5%	—
Power - Maximum	500	mW
Impedance (Maximum)	93	Ohms
Current - Reverse Leakage @ 33 V	100	nA
Voltage - Forward (Maximum) @ 10 mA	900	mV
Operating Temperature Range	-55 to 150	°C
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MMSZ5260B-TP is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 43 V nominal
Tolerance: ±5% or tighter (±2% acceptable)
Maximum power dissipation: 500 mW
Package: SOD-123 surface mount
Impedance: 93 Ohms maximum
Reverse leakage current: 100 nA @ 33 V
Operating temperature range: -55°C to 150°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

All identified substitute parts meet these electrical and mechanical parameters. Packaging format variations (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical compatibility but may influence procurement and assembly workflows. One substitute part (SZMMSZ5260BT1G) includes automotive-grade qualification (AEC-Q101), which represents an enhanced specification level suitable for automotive applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ 33V	Vf (Max) @ 10mA	Temp Range	Package	Packaging Format	RoHS3
MMSZ5260B-TP	Micro Commercial Co	43 V	±5%	500 mW	93 Ω	100 nA	900 mV	-55 to 150°C	SOD-123	Tape & Reel	Yes
MMSZ5260B-E3-08	Vishay General Semiconductor	43 V	±5%	500 mW	93 Ω	100 nA	—	-55 to 150°C	SOD-123	Tape & Reel	Yes
MMSZ5260BT1G	onsemi	43 V	±5%	500 mW	93 Ω	100 nA	900 mV	-55 to 150°C	SOD-123	Cut Tape & Digi-Reel	Yes
MMSZ5260C-E3-08	Vishay General Semiconductor	43 V	±2%	500 mW	93 Ω	100 nA	—	-55 to 150°C	SOD-123	Tape & Reel	Yes
SZMMSZ5260BT1G	onsemi	43 V	±5%	500 mW	93 Ω	100 nA	900 mV	-55 to 150°C	SOD-123	Cut Tape & Digi-Reel	Yes

Engineering Selection Recommendations

MMSZ5260B-E3-08 (Vishay General Semiconductor) This part is electrically equivalent to the main part with identical zener voltage, tolerance, power rating, and impedance specifications. It is suitable for direct substitution in standard applications. Active product status and ROHS3 compliance confirm ongoing support and regulatory alignment.

MMSZ5260BT1G (onsemi) This part meets all electrical specifications and includes forward voltage specification data. The Cut Tape & Digi-Reel packaging format provides an alternative to traditional tape and reel, accommodating different assembly and procurement workflows. High inventory availability (89,400 units) supports supply chain continuity. Active product status confirms manufacturer support.

MMSZ5260C-E3-08 (Vishay General Semiconductor) This part offers tighter tolerance specification (±2% versus ±5%), providing enhanced voltage accuracy for applications requiring stricter regulation performance. All other electrical parameters remain equivalent. This variant is suitable for precision voltage reference applications where tolerance margin is critical.

SZMMSZ5260BT1G (onsemi) This part is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. It meets all electrical specifications of the main part and is suitable for automotive and high-reliability applications. The automotive qualification represents an enhanced specification level beyond standard industrial requirements. Cut Tape & Digi-Reel packaging format is available.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5260B-E3-08 be used as a direct replacement for MMSZ5260B-TP? A: Yes. Both parts share identical zener voltage (43 V), tolerance (±5%), power rating (500 mW), impedance (93 Ω), and operating temperature range (-55°C to 150°C). The SOD-123 package and surface mount configuration are identical. The primary difference is packaging format (Tape & Reel for both), which does not affect electrical performance.

Q: What is the difference between MMSZ5260BT1G and MMSZ5260B-TP? A: Electrical specifications are identical across zener voltage, tolerance, power, impedance, and temperature range. The primary difference is packaging format: MMSZ5260BT1G uses Cut Tape & Digi-Reel format, while MMSZ5260B-TP uses Tape & Reel format. This affects procurement and assembly handling but not circuit performance.

Q: When should MMSZ5260C-E3-08 be selected instead of the main part? A: MMSZ5260C-E3-08 should be selected when voltage regulation accuracy is critical. This part offers ±2% tolerance compared to ±5% for the main part, resulting in tighter zener voltage specification (42.14 V to 43.86 V versus 40.85 V to 45.15 V). All other electrical parameters remain equivalent.

Q: Is SZMMSZ5260BT1G suitable for automotive applications? A: Yes. SZMMSZ5260BT1G carries AEC-Q101 automotive qualification and automotive-grade designation. It meets all electrical specifications of the main part and is designed for automotive and high-reliability environments. This part is suitable for applications requiring automotive-grade component certification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts carry ROHS3 compliance certification, matching the main part specification. All parts also maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

Q: Does packaging format affect circuit performance? A: No. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) affects procurement, storage, and assembly handling procedures but does not alter electrical performance or circuit compatibility. The SOD-123 package and surface mount configuration remain identical across all substitute parts.

Q: What is the inventory status of substitute parts? A: MMSZ5260BT1G has the highest inventory availability (89,400 units), followed by SZMMSZ5260BT1G (65,100 units), MMSZ5260C-E3-08 (17,880 units), and MMSZ5260B-E3-08 (2,192 units). The main part MMSZ5260B-TP has 2,726 units in stock.

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