BZT52C11-TP Equivalent & Substitute Parts

Part Overview

The BZT52C11-TP is a Zener diode rated at 11 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-123 package. Manufactured by Micro Commercial Co, this component is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute Zener diodes with identical or superior electrical characteristics and compatible packaging enable seamless integration into existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Tolerance	±5%	%
Power - Max	200	mW
Impedance (Max)	20	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BZT52C11-TP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage: 11 V nominal with ±5% tolerance
Forward voltage: 900 mV maximum at 10 mA
Operating temperature range: -65°C to 150°C minimum
Package: SOD-123 surface mount

Power Rating Consideration: Substitute parts with power ratings equal to or greater than 200 mW are functionally compatible. The BZT52C11-TP operates at 200 mW maximum; substitute parts rated at 500 mW provide enhanced thermal margin and are direct replacements.

Impedance and Leakage Current: Impedance values of 20 to 22 Ohms and reverse leakage currents in the range of 50 nA to 2 µA at specified reverse voltages fall within acceptable substitution parameters for this application category.

Compliance and Availability: All substitute parts listed maintain ROHS3 compliance, MSL Level 1 rating, and active product status, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Impedance (Max)	Reverse Leakage @ Vr	Vf (Max) @ If	Temp Range	Package	Status
BZT52C11-TP	Micro Commercial Co	11 V	200 mW	20 Ω	100 nA @ 8 V	900 mV @ 10 mA	-65 to 150°C	SOD-123	Discontinued
BZT52C11-7-F	Diodes Incorporated	11 V	500 mW	20 Ω	100 nA @ 8 V	900 mV @ 10 mA	-65 to 150°C	SOD-123	Active
DDZ9698-7	Diodes Incorporated	11 V	500 mW	—	50 nA @ 8.4 V	900 mV @ 10 mA	-65 to 150°C	SOD-123	Active
MMSZ11T1G	onsemi	11 V	500 mW	20 Ω	100 nA @ 8 V	900 mV @ 10 mA	-55 to 150°C	SOD-123	Active
MMSZ5241B-7-F	Diodes Incorporated	11 V	500 mW	22 Ω	2 µA @ 8.4 V	900 mV @ 10 mA	-65 to 150°C	SOD-123	Active

Engineering Selection Recommendations

Primary Substitute: BZT52C11-7-F The BZT52C11-7-F from Diodes Incorporated is the direct electrical equivalent with identical impedance (20 Ω) and reverse leakage characteristics (100 nA @ 8 V). It maintains the full operating temperature range (-65°C to 150°C) and offers increased power rating (500 mW), providing superior thermal performance. Active product status ensures long-term availability.

Secondary Substitute: DDZ9698-7 The DDZ9698-7 from Diodes Incorporated provides 11 V Zener voltage with 500 mW power rating and lower reverse leakage (50 nA @ 8.4 V). This part is suitable for applications requiring reduced leakage current. Active status and ROHS3 compliance confirm suitability for new designs.

Alternative Substitute: MMSZ11T1G The MMSZ11T1G from onsemi delivers identical electrical performance with 11 V nominal voltage, 500 mW power rating, and 20 Ω impedance. The operating temperature range extends to -55°C minimum (versus -65°C for the primary substitute), which is acceptable for most industrial and commercial applications. Active product status supports ongoing availability.

Tertiary Substitute: MMSZ5241B-7-F The MMSZ5241B-7-F from Diodes Incorporated meets all core substitution criteria with 11 V Zener voltage and 500 mW power rating. Impedance of 22 Ω and reverse leakage of 2 µA @ 8.4 V remain within acceptable parameters for this component category. Full temperature range support (-65°C to 150°C) and active status confirm compatibility.

All substitute parts are ROHS3 compliant, MSL Level 1 rated, and available in SOD-123 surface mount packaging, ensuring direct integration into existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can BZT52C11-7-F directly replace BZT52C11-TP without circuit modification? A: Yes. The BZT52C11-7-F maintains identical Zener voltage (11 V), impedance (20 Ω), forward voltage (900 mV @ 10 mA), and operating temperature range (-65°C to 150°C). The increased power rating (500 mW versus 200 mW) is a beneficial enhancement that does not require design changes.

Q: What is the difference between the substitute parts listed? A: All substitute parts share the same 11 V Zener voltage, ±5% tolerance, and SOD-123 package. Differences exist in power rating (all 500 mW, higher than original 200 mW), impedance (20 to 22 Ω range), reverse leakage current (50 nA to 2 µA), and minimum operating temperature (-55°C to -65°C). These variations remain within acceptable substitution parameters.

Q: Is the SOD-123 package identical across all listed parts? A: Yes. All parts, including the original BZT52C11-TP and all substitutes, use the SOD-123 surface mount package. No PCB layout or footprint changes are required for substitution.

Q: Why do substitute parts have higher power ratings (500 mW) than the original (200 mW)? A: Higher power ratings provide improved thermal margin and reliability in the same package size. A 500 mW part operating at 200 mW dissipation experiences lower junction temperature, extending component life and improving circuit stability. This is a direct upgrade with no negative impact.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed—BZT52C11-7-F, DDZ9698-7, MMSZ11T1G, and MMSZ5241B-7-F—are ROHS3 compliant with MSL Level 1 moisture sensitivity rating, meeting current regulatory requirements.

Q: Which substitute part has the lowest reverse leakage current? A: The DDZ9698-7 exhibits the lowest reverse leakage at 50 nA @ 8.4 V. For applications requiring minimal leakage, this part is the optimal selection.

Q: Can MMSZ11T1G be used in applications requiring -65°C operation? A: The MMSZ11T1G operates from -55°C to 150°C. For applications requiring -65°C minimum temperature, use BZT52C11-7-F, DDZ9698-7, or MMSZ5241B-7-F, which all support the full -65°C to 150°C range.

Q: What is the significance of impedance values (20 Ω versus 22 Ω)? A: Impedance affects transient response and voltage regulation characteristics. Values of 20 to 22 Ω are functionally equivalent for standard Zener diode applications. The 2 Ω difference between BZT52C11-7-F (20 Ω) and MMSZ5241B-7-F (22 Ω) is negligible for most circuit designs.

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