BZT52C3V6-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The BZT52C3V6-TP is a 3.6 V, 200 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-123 packaging. This component is classified as Active and is ROHS3 compliant. The part is supplied in Tape & Reel packaging format with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical characteristics including nominal zener voltage, package type, and operating temperature range. Alternative components may offer different power dissipation ratings, tolerance specifications, or packaging formats while maintaining functional compatibility within the specified electrical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.6	V
Power - Max	200	mW
Tolerance	±6%	—
Impedance (Max)	90	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZT52C3V6-TP is determined by the following critical parameters:

Mandatory Matching Parameters:

Nominal Zener Voltage (Vz): 3.6 V
Package / Case: SOD-123
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Flexible Parameters (May Vary):

Power - Max: Substitute parts may have equal or higher power ratings (200 mW, 370 mW, 500 mW)
Tolerance: May range from ±2% to ±6%
Impedance (Max): Typically 24 to 90 Ohms
Current - Reverse Leakage @ Vr: May vary based on test conditions
Operating Temperature Range: Minimum -55°C to -65°C; maximum 150°C
Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®

Substitute parts are grouped by power dissipation capability and manufacturer. Parts with higher power ratings provide design margin and are suitable for applications where the original 200 mW specification is not a limiting constraint.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (mW)	Tolerance	Zzt (Ohms)	Vf @ If (mV @ mA)	Temp Range (°C)	Package	Status
BZT52C3V6-TP	Micro Commercial Co	3.6	200	±6%	90	900 @ 10	-65 to 150	SOD-123	Active
BZT52C3V6-13-F	Diodes Incorporated	3.6	370	±5.56%	90	900 @ 10	-65 to 150	SOD-123	Active
BZT52C3V6-7-F	Diodes Incorporated	3.6	500	±6%	90	900 @ 10	-65 to 150	SOD-123	Active
DDZ9685-7	Diodes Incorporated	3.6	500	±5%	—	900 @ 10	-65 to 150	SOD-123	Active
MMSZ3V6T1G	onsemi	3.6	500	±5%	90	900 @ 10	-55 to 150	SOD-123	Active
MMSZ4685T1G	onsemi	3.6	500	±5%	—	900 @ 10	-55 to 150	SOD-123	Active
MMSZ5227C-HE3-18	Vishay General Semiconductor - Diodes Division	3.6	500	±2%	24	—	-55 to 150	SOD-123	Obsolete
PZU3.6BA,115	NXP USA Inc.	3.6	320	±5%	90	1100 @ 100	-55 to 150	SOD-323	Active
SZMMSZ3V6T1G	onsemi	3.6	500	±5%	90	900 @ 10	-55 to 150	SOD-123	Active
SZMMSZ4685T1G	onsemi	3.6	500	±5%	—	900 @ 10	-55 to 150	SOD-123	Active

Engineering Selection Recommendations

Direct Substitutes (Same Power Rating): No substitute parts with identical 200 mW power rating are provided in the substitute list. The BZT52C3V6-TP remains the only 200 mW option for this voltage specification in SOD-123 packaging.

Higher Power Substitutes (370 mW and 500 mW): Parts with increased power dissipation ratings are suitable for applications where thermal margin is required or where the original 200 mW specification does not constrain circuit operation. These include BZT52C3V6-13-F (370 mW) and multiple 500 mW options from Diodes Incorporated, onsemi, and Vishay.

Active vs. Obsolete Status: MMSZ5227C-HE3-18 is classified as Obsolete and should not be selected for new designs unless legacy compatibility is required. All other substitute parts maintain Active product status.

Automotive Grade Considerations: SZMMSZ3V6T1G and SZMMSZ4685T1G are qualified to AEC-Q101 automotive standards. MMSZ5227C-HE3-18 also carries automotive qualification. These parts are suitable for automotive applications requiring component traceability and reliability certification.

Operating Temperature Range: BZT52C3V6-TP and Diodes Incorporated parts (BZT52C3V6-13-F, BZT52C3V6-7-F, DDZ9685-7) support -65°C minimum operating temperature. onsemi and NXP parts support -55°C minimum. Selection depends on application temperature requirements.

Package Compatibility: PZU3.6BA,115 uses SOD-323 (SC-76) packaging, which differs from the SOD-123 package of the main part. This part is not a direct mechanical substitute and requires PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can I use a 500 mW zener diode as a substitute for the 200 mW BZT52C3V6-TP?

A: Yes. A higher power-rated zener diode with matching nominal voltage (3.6 V), package (SOD-123), and operating temperature range is electrically compatible. The higher power rating provides additional thermal margin and does not degrade circuit performance. The zener voltage regulation characteristic remains the same.

Q: What is the difference between BZT52C3V6-7-F and MMSZ3V6T1G if both are 500 mW?

A: Both parts share identical nominal zener voltage (3.6 V), power rating (500 mW), and SOD-123 packaging. Key differences are: BZT52C3V6-7-F supports -65°C minimum temperature and is supplied in Cut Tape & Digi-Reel format; MMSZ3V6T1G supports -55°C minimum temperature and is supplied in Cut Tape & Digi-Reel format. Tolerance specifications differ (±6% vs. ±5%). Selection depends on temperature requirements and packaging preference.

Q: Why is MMSZ5227C-HE3-18 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While the part may remain available in inventory, it is not recommended for new designs. Active alternatives with equivalent electrical specifications should be selected instead.

Q: Can I substitute PZU3.6BA,115 for BZT52C3V6-TP?

A: PZU3.6BA,115 uses SOD-323 packaging, while BZT52C3V6-TP uses SOD-123 packaging. These packages have different physical dimensions and pin configurations. Direct mechanical substitution on the PCB is not possible without layout modification. Electrical characteristics are compatible (3.6 V nominal, similar power rating), but package incompatibility prevents drop-in replacement.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. Parts bearing this qualification (SZMMSZ3V6T1G, SZMMSZ4685T1G, MMSZ5227C-HE3-18) have undergone rigorous testing for reliability, temperature cycling, and performance consistency. These parts are suitable for automotive applications requiring component traceability and certified reliability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference, including the main part BZT52C3V6-TP and all substitutes, are ROHS3 compliant. This ensures compliance with European Union Restriction of Hazardous Substances regulations.

Q: What is the significance of impedance (Zzt) specification?

A: Impedance (Zzt) represents the dynamic impedance of the zener diode at the specified zener current. Lower impedance values indicate better voltage regulation characteristics. BZT52C3V6-TP and most substitutes specify 90 Ohms maximum impedance. MMSZ5227C-HE3-18 specifies 24 Ohms, indicating superior regulation performance. Selection depends on circuit requirements for voltage stability.

Q: Can I use automotive-grade parts (SZMMSZ series) in non-automotive applications?

A: Yes. Automotive-grade parts meet or exceed standard commercial specifications and are fully compatible with non-automotive applications. The AEC-Q101 qualification provides additional assurance of reliability and consistency, making these parts suitable for any application requiring high reliability.

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