BZX84C11W-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The BZX84C11W-TP is an 11 V, 200 mW surface mount Zener diode manufactured by Micro Commercial Co in SOT-323 packaging. This component is classified as Active and maintains full RoHS3 compliance with unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified based on matching nominal Zener voltage, tolerance, power dissipation capability, and surface mount package compatibility.

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	1.2	V @ 100 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount
Package / Case	SC-70, SOT-323
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

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

Primary Matching Criteria:

Nominal Zener voltage (Vz): 11 V
Voltage tolerance: ±5%
Power dissipation rating: 200 mW or greater
Surface mount package type: SOT-323 or SOT-523
Operating temperature range compatibility
RoHS3 compliance status

Secondary Compatibility Factors:

Impedance (Zzt) maximum: 20 to 22 Ohms
Reverse leakage current specifications
Forward voltage characteristics
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories based on package type: SOT-323 (direct footprint match) and SOT-523 (alternative surface mount package). Parts with 150 mW power rating are suitable only where circuit design permits reduced power dissipation compared to the 200 mW main part.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Temp Range	RoHS Status
BZX84C11W-TP	Micro Commercial Co	11 V	±5%	200 mW	20 Ω	SOT-323	-55 to 150°C	ROHS3
BZX84C11W-7-F	Diodes Incorporated	11 V	±5%	200 mW	20 Ω	SOT-323	-65 to 125°C	ROHS3
MMBZ5241BW-7-F	Diodes Incorporated	11 V	±5%	200 mW	22 Ω	SOT-323	-65 to 150°C	ROHS3
BZX84C11T-7-F	Diodes Incorporated	11 V	±5%	150 mW	20 Ω	SOT-523	-65 to 150°C	ROHS3
MMBZ5241BT-7-F	Diodes Incorporated	11 V	±5%	150 mW	22 Ω	SOT-523	-65 to 150°C	ROHS3

Engineering Selection Recommendations

Direct Footprint Substitutes (SOT-323 Package):

BZX84C11W-7-F and MMBZ5241BW-7-F are both qualified substitutes for BZX84C11W-TP with identical 200 mW power ratings and SOT-323 packaging. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating. BZX84C11W-7-F provides identical impedance specification (20 Ω), while MMBZ5241BW-7-F specifies 22 Ω maximum impedance. Both support extended operating temperature ranges (-65°C minimum vs. -55°C for the main part).

Alternative Package Substitutes (SOT-523 Package):

BZX84C11T-7-F and MMBZ5241BT-7-F are SOT-523 package alternatives with 150 mW power ratings. These parts are suitable for applications where circuit board space constraints favor the smaller SOT-523 footprint and where power dissipation requirements do not exceed 150 mW. Both maintain ROHS3 compliance and support -65 to 150°C operating temperature range.

Compliance Status:

All substitute parts are Active products with ROHS3 compliance, REACH Unaffected status, and EAR99 export classification, matching the regulatory profile of the main part.

Frequently Asked Questions (FAQ)

Q: Can BZX84C11W-7-F be used as a direct replacement for BZX84C11W-TP?

A: Yes. Both parts share identical nominal Zener voltage (11 V), tolerance (±5%), power rating (200 mW), impedance specification (20 Ω), and SOT-323 package. The primary difference is the lower minimum operating temperature (-65°C vs. -55°C) and slightly reduced maximum operating temperature (125°C vs. 150°C) for BZX84C11W-7-F.

Q: What is the difference between SOT-323 and SOT-523 packages?

A: SOT-323 and SOT-523 are both surface mount packages for small signal diodes. SOT-523 is a smaller package footprint. Selection between these packages depends on circuit board layout requirements and available space. Electrical performance of the Zener diode remains equivalent when nominal voltage and tolerance specifications match.

Q: Can I use MMBZ5241BT-7-F (150 mW) in place of BZX84C11W-TP (200 mW)?

A: Substitution is possible only if circuit design permits operation at 150 mW maximum power dissipation. The 50 mW reduction in power rating may limit the component's ability to regulate voltage under high current conditions. Verify that actual circuit power dissipation does not exceed 150 mW.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the regulatory requirement of the main part BZX84C11W-TP.

Q: What does impedance (Zzt) specification mean for Zener diode substitution?

A: Impedance (Zzt) is the dynamic impedance of the Zener diode in the breakdown region. Lower impedance values indicate better voltage regulation characteristics. BZX84C11W-TP and BZX84C11W-7-F specify 20 Ω maximum, while MMBZ5241 series parts specify 22 Ω maximum. Both values are acceptable for standard voltage regulation applications.

Q: What is the significance of reverse leakage current specifications?

A: Reverse leakage current indicates the small current flowing through the Zener diode when reverse biased below the breakdown voltage. BZX84C11W-TP specifies 100 nA @ 8 V, while MMBZ5241 series parts specify 2 µA @ 8.4 V. Higher leakage current may affect circuit performance in sensitive applications requiring minimal standby current.

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