BZT52C15-TP Equivalent & Substitute Parts

Part Overview

The BZT52C15-TP is a 15 V Zener diode rated at 200 mW with ±6% tolerance, manufactured by Micro Commercial Co in SOD-123 surface mount package. This component is classified as Active and is ROHS3 compliant. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when higher power ratings are required for design margin, or when alternative manufacturers' components are preferred for supply chain diversification.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	15 V
Tolerance	±6%
Power - Max	200 mW
Impedance (Max)	30 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 10.5 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Package / Case	SOD-123
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BZT52C15-TP is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - Zener (Nom): 15 V
Package / Case: SOD-123
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Power - Max: Substitute parts may have equal or higher power ratings (200 mW or greater)
Tolerance: Substitute parts may have equal or tighter tolerance (±6% or better)
Impedance (Max): Substitute parts must maintain 30 Ohms or lower
Current - Reverse Leakage @ Vr: Substitute parts must maintain 100 nA or lower at specified voltage
Operating Temperature: Substitute parts must support the full range or equivalent minimum coverage
Voltage - Forward (Vf): Substitute parts must maintain 900 mV or lower at 10 mA

Parts with higher power ratings (410 mW or 500 mW) are direct substitutes as they provide superior thermal performance while maintaining all other electrical characteristics. Parts with tighter tolerance specifications (±2% or ±5%) are also acceptable as they provide improved voltage regulation accuracy.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Leakage @ Vr	Vf (Max) @ If	Temp Range	Status
BZT52C15-TP	Micro Commercial Co	15 V	±6%	200 mW	30 Ω	100 nA @ 10.5 V	900 mV @ 10 mA	-65°C ~ 150°C	Active
BZT52C15-13-F	Diodes Incorporated	15 V	±6%	500 mW	30 Ω	100 nA @ 10.5 V	900 mV @ 10 mA	-65°C ~ 150°C	Active
BZT52C15-7-F	Diodes Incorporated	15 V	±6%	500 mW	30 Ω	100 nA @ 10.5 V	900 mV @ 10 mA	-65°C ~ 150°C	Active
BZT52-C15_R1_00001	Panjit International Inc.	15 V	±2%	410 mW	30 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Active
BZT52C15-G3-08	Vishay General Semiconductor	15 V	±5%	410 mW	30 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Active
BZT52C15-G3-18	Vishay General Semiconductor	15 V	±5%	410 mW	30 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Active
BZT52C15-HE3-08	Vishay General Semiconductor	15 V	±5%	410 mW	30 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Obsolete
MMSZ15T1G	onsemi	15 V	±5%	500 mW	30 Ω	50 nA @ 10.5 V	900 mV @ 10 mA	-55°C ~ 150°C	Active
MMSZ4702-HE3-08	Vishay General Semiconductor	15 V	±5%	500 mW	—	50 nA @ 11.4 V	—	-55°C ~ 150°C	Obsolete
MMSZ5245B-HE3-08	Vishay General Semiconductor	15 V	±5%	500 mW	16 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Obsolete
MMSZ5245B-HE3-18	Vishay General Semiconductor	15 V	±5%	500 mW	16 Ω	100 nA @ 11 V	—	-55°C ~ 150°C	Obsolete

Engineering Selection Recommendations

Direct Substitutes (Active Status):

The BZT52C15-13-F and BZT52C15-7-F from Diodes Incorporated are direct substitutes with identical electrical specifications to the BZT52C15-TP, with the exception of higher power rating (500 mW versus 200 mW). Both parts maintain the same voltage regulation characteristics, tolerance, and operating temperature range. The BZT52C15-13-F is packaged in Tape & Reel format, while the BZT52C15-7-F is supplied in Cut Tape & Digi-Reel format. Both are ROHS3 compliant and Active status.

Higher Power Alternatives (Active Status):

The MMSZ15T1G from onsemi provides 500 mW power rating with ±5% tolerance and lower reverse leakage (50 nA @ 10.5 V). This part is suitable for applications requiring enhanced thermal margin. The operating temperature range is -55°C to 150°C, which covers the critical upper and lower bounds of the original part. This part is Active status.

Tighter Tolerance Alternative (Active Status):

The BZT52-C15_R1_00001 from Panjit International Inc. offers ±2% tolerance with 410 mW power rating, providing improved voltage regulation accuracy. The operating temperature range is -55°C to 150°C. This part is Active status.

Active Status Alternatives with Improved Impedance:

The BZT52C15-G3-08 and BZT52C15-G3-18 from Vishay General Semiconductor are Active status parts with 410 mW power rating and ±5% tolerance. Both maintain 30 Ohm impedance specification and support the -55°C to 150°C operating range.

Obsolete Parts (Not Recommended for New Designs):

The BZT52C15-HE3-08, MMSZ4702-HE3-08, MMSZ5245B-HE3-08, and MMSZ5245B-HE3-18 are classified as Obsolete. While these parts may be available in inventory, they are not suitable for new design implementations. The MMSZ5245B variants feature lower impedance (16 Ohms) which may provide improved performance in specific applications, but their obsolete status precludes recommendation for ongoing production use.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the BZT52C15-TP?

A: Yes. Substitute parts with power ratings of 410 mW or 500 mW are acceptable. Higher power ratings provide improved thermal performance and do not degrade circuit functionality. The voltage regulation characteristics remain identical.

Q: What is the difference between the BZT52C15-13-F and BZT52C15-7-F?

A: Both parts are electrically identical with 500 mW power rating and ±6% tolerance. The primary difference is packaging format: BZT52C15-13-F is supplied in Tape & Reel (TR), while BZT52C15-7-F is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly equipment compatibility and procurement requirements.

Q: Is the MMSZ15T1G a suitable replacement?

A: Yes. The MMSZ15T1G from onsemi is a suitable substitute with 500 mW power rating, ±5% tolerance, and lower reverse leakage (50 nA @ 10.5 V). The operating temperature range is -55°C to 150°C, which covers the critical temperature bounds. This part is Active status.

Q: Why are some substitute parts marked as Obsolete?

A: Obsolete parts are no longer in active production and are not recommended for new designs. While inventory may be available, using obsolete components introduces supply chain risk and limits long-term availability. Active status parts are preferred for new implementations.

Q: Can I use the BZT52-C15_R1_00001 for improved voltage accuracy?

A: Yes. The BZT52-C15_R1_00001 from Panjit International Inc. offers ±2% tolerance compared to the ±6% tolerance of the BZT52C15-TP. This tighter tolerance provides improved voltage regulation accuracy. The part is Active status with 410 mW power rating.

Q: What is the significance of impedance (Zzt) in Zener diode selection?

A: Impedance affects the dynamic response of the Zener diode to load current changes. Lower impedance values provide better voltage regulation under transient conditions. The BZT52C15-TP specifies 30 Ohms maximum. Most substitute parts maintain this specification, with the exception of MMSZ5245B variants which specify 16 Ohms, providing superior dynamic performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the environmental compliance status of the BZT52C15-TP.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel packaging supplies components on tape segments, suitable for lower-volume or mixed-component assembly operations. Electrical performance is identical; selection depends on assembly process requirements.

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