BZT52B16-TP Equivalent & Substitute Parts

Part Overview

The BZT52B16-TP is a 16 V Zener diode manufactured by Micro Commercial Co, rated for 410 mW power dissipation in a surface mount SOD-123 package. This component is classified as Active and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits in electronic systems. Substitute parts are identified when equivalent voltage ratings, package types, and electrical performance parameters align with application requirements, enabling component sourcing flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Power - Max	410	mW
Tolerance	±2%	—
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55°C ~ 175°C	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by alignment of the following critical parameters:

Primary Substitution Criteria:

Zener voltage rating (Vz): Must match 16 V nominal
Package type: Must be SOD-123 surface mount
Mounting compatibility: Surface mount technology
Regulatory compliance: ROHS3 and REACH status

Secondary Compatibility Factors:

Power dissipation rating (may be equal or higher)
Voltage tolerance (±2% to ±5% acceptable range)
Operating temperature range (must encompass application requirements)
Forward voltage characteristics at specified current

All identified substitute parts meet the primary criteria. Variations in power rating, impedance, and tolerance reflect different manufacturer specifications while maintaining functional equivalence for 16 V Zener applications.

Parameter Comparison

Parameter	BZT52B16-TP (Main)	DDZ16Q-7	MMSZ16T1G	SZMMSZ16T1G	SZMMSZ5246BT1G	SZMMSZ5246ET1G
Manufacturer	Micro Commercial Co	Diodes Incorporated	onsemi	onsemi	onsemi	onsemi
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V	16 V	16 V
Tolerance	±2%	±2.5%	±5%	±5%	±5%	±5%
Power - Max	410 mW	310 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	40 Ω	18 Ω	40 Ω	40 Ω	17 Ω	17 Ω
Current - Reverse Leakage @ Vr	100 nA @ 12 V	50 nA @ 12 V	50 nA @ 11.2 V	50 nA @ 11.2 V	100 nA @ 12 V	100 nA @ 12 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-55°C ~ 175°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123	SOD-123	SOD-123
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	—	Automotive	—	Automotive	Automotive	Automotive
Qualification	—	AEC-Q101	—	AEC-Q101	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

BZT52B16-TP (Primary Part): The BZT52B16-TP is an Active product with ROHS3 compliance and REACH unaffected status. It provides the tightest voltage tolerance at ±2% and operates across the widest temperature range (-55°C to 175°C). This part is suitable for applications requiring high precision voltage regulation and extended temperature operation.

DDZ16Q-7 (Diodes Incorporated): This substitute is qualified to AEC-Q101 automotive standards and carries Automotive grade designation. It operates at a lower maximum power rating (310 mW) compared to the main part. The operating temperature range is -65°C to 150°C. This part is appropriate for automotive applications where lower power dissipation is acceptable and automotive qualification is required.

MMSZ16T1G (onsemi): This part offers higher power dissipation (500 mW) with ±5% tolerance. It maintains the same impedance specification (40 Ω) as the main part and operates from -55°C to 150°C. This substitute is suitable for applications requiring higher power handling without automotive qualification requirements.

SZMMSZ16T1G (onsemi): This part is qualified to AEC-Q101 automotive standards with Automotive grade designation. It provides 500 mW power dissipation and ±5% tolerance. Operating temperature range is -55°C to 150°C. This substitute is appropriate for automotive applications requiring higher power dissipation than the main part.

SZMMSZ5246BT1G and SZMMSZ5246ET1G (onsemi): Both parts are qualified to AEC-Q101 automotive standards with Automotive grade designation. They provide 500 mW power dissipation, lower impedance (17 Ω), and ±5% tolerance. Operating temperature range is -55°C to 150°C. These substitutes are appropriate for automotive applications where lower impedance characteristics are beneficial.

Frequently Asked Questions (FAQ)

Q: Can DDZ16Q-7 replace BZT52B16-TP in all applications?

A: DDZ16Q-7 is a functional substitute for 16 V Zener applications in SOD-123 packages. However, it has a lower maximum power rating (310 mW versus 410 mW) and a narrower operating temperature range (maximum 150°C versus 175°C). Verify that your application does not exceed 310 mW power dissipation and operates within -65°C to 150°C before substitution.

Q: What is the difference between MMSZ16T1G and SZMMSZ16T1G?

A: Both parts share identical electrical specifications (16 V, 500 mW, ±5% tolerance, SOD-123 package). The primary difference is that SZMMSZ16T1G carries AEC-Q101 automotive qualification and Automotive grade designation, while MMSZ16T1G does not. Select SZMMSZ16T1G for automotive applications requiring qualification compliance.

Q: Why do SZMMSZ5246BT1G and SZMMSZ5246ET1G have lower impedance than other substitutes?

A: These parts specify 17 Ω maximum impedance compared to 40 Ω in the main part and other substitutes. Lower impedance indicates better voltage regulation characteristics at higher currents. Both parts are automotive qualified and suitable for applications where improved regulation performance is required.

Q: Is the ±2% tolerance of BZT52B16-TP critical for my application?

A: Tolerance significance depends on your circuit requirements. If your design requires voltage regulation within ±2%, use BZT52B16-TP. If ±5% tolerance is acceptable, substitutes such as MMSZ16T1G, SZMMSZ16T1G, SZMMSZ5246BT1G, or SZMMSZ5246ET1G are suitable. DDZ16Q-7 offers intermediate tolerance at ±2.5%.

Q: Can I use a substitute with higher power rating than the main part?

A: Yes. Substitutes with equal or higher power ratings (310 mW or greater) are compatible. Higher power ratings provide additional thermal margin. Ensure your PCB layout and thermal management accommodate the substitute part's characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of BZT52B16-TP.

Q: Which substitute is best for automotive applications?

A: DDZ16Q-7, SZMMSZ16T1G, SZMMSZ5246BT1G, and SZMMSZ5246ET1G all carry AEC-Q101 automotive qualification and Automotive grade designation. Select based on your specific power dissipation and impedance requirements within the automotive operating temperature range.

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