BZX84C11_D87Z Equivalent & Substitute Parts

Part Overview

The BZX84C11_D87Z is a Zener diode manufactured by onsemi, rated at 11 V nominal with 350 mW maximum power dissipation in a surface mount SOT-23-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The BZX84C11_D87Z serves voltage regulation and protection functions in electronic circuits requiring 11 V Zener reference characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Tolerance	±5%	—
Power - Max	350	mW
Impedance (Max)	20	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BZX84C11_D87Z is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 11 V (exact match required)
Tolerance: ±5% (acceptable range for voltage regulation)
Power - Max: 350 mW or greater (equal or higher rating acceptable)
Impedance (Max): 20 Ohms or lower (equal or lower acceptable)
Current - Reverse Leakage @ Vr: 100 nA @ 8 V or lower (equal or lower acceptable)
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA (equal or lower acceptable)
Operating Temperature: -55°C to 150°C minimum (equal or wider range acceptable)
Mounting Type: Surface Mount (required)
Package / Case: TO-236-3, SC-59, SOT-23-3 (required for mechanical compatibility)

Substitute parts are grouped into three categories based on availability and product status:

Direct Equivalents (Active Status): Parts with identical electrical specifications and active product status, suitable for direct replacement.

Similar Specifications (Active Status): Parts with equivalent or superior electrical ratings and active product status, with minor variations in power rating or impedance.

Upgraded Alternatives (Active Status): Parts with enhanced power ratings or automotive qualification, providing improved performance margins.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf (Max) @ If	Temp Range	Status
BZX84C11_D87Z	onsemi	11 V	±5%	350 mW	20 Ω	900 mV @ 10 mA	-55 to 150°C	Obsolete
BZX84C11LT1G	onsemi	11 V	±5%	225 mW	20 Ω	900 mV @ 10 mA	-65 to 150°C	Active
SZBZX84C11LT1G	onsemi	11 V	±5%	225 mW	20 Ω	900 mV @ 10 mA	-65 to 150°C	Active
BZX84C11-7-F	Diodes Incorporated	11 V	±5%	300 mW	20 Ω	900 mV @ 10 mA	-65 to 150°C	Active
BZX84-C11,215	Nexperia USA Inc.	11 V	±5%	250 mW	20 Ω	900 mV @ 10 mA	-65 to 150°C	Active
BZX84-C11,235	NXP USA Inc.	11 V	±5%	250 mW	20 Ω	900 mV @ 10 mA	-65 to 150°C	Active
BZX84B11-TP	Micro Commercial Co	11 V	±2%	350 mW	20 Ω	900 mV @ 10 mA	-55 to 150°C	Active
CZRT5241B-G	Comchip Technology	11 V	±5%	300 mW	22 Ω	900 mV @ 10 mA	-65 to 150°C	Active
MMBZ5241B-7-F	Diodes Incorporated	11 V	±5%	350 mW	22 Ω	900 mV @ 10 mA	-65 to 150°C	Active
MMBZ5241B-TP	Micro Commercial Co	11 V	±5%	350 mW	22 Ω	900 mV @ 10 mA	-55 to 150°C	Active
MMBZ5241BQ-7-F	Diodes Incorporated	11 V	±5%	350 mW	22 Ω	900 mV @ 10 mA	-65 to 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for Obsolete Part Mitigation):

BZX84C11LT1G and SZBZX84C11LT1G from onsemi maintain the same base product platform as the obsolete BZX84C11_D87Z. Both are active products with RoHS3 compliance. SZBZX84C11LT1G includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. The reduced power rating (225 mW versus 350 mW) is acceptable for circuits not requiring maximum power dissipation margin.

Equivalent Power Rating Alternatives:

BZX84B11-TP from Micro Commercial Co provides identical 350 mW power rating with ±2% tolerance (tighter than the original ±5%), maintaining the same operating temperature range as the original part. This part is active and RoHS3 compliant.

MMBZ5241B-7-F and MMBZ5241BQ-7-F from Diodes Incorporated provide 350 mW power rating with slightly elevated impedance (22 Ohms versus 20 Ohms). MMBZ5241BQ-7-F includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C).

Cross-Manufacturer Options:

BZX84-C11,215 (Nexperia USA Inc.) and BZX84-C11,235 (NXP USA Inc.) provide 250 mW power rating with AEC-Q101 automotive qualification and extended temperature range. These are suitable for applications with moderate power dissipation requirements.

BZX84C11-7-F from Diodes Incorporated provides 300 mW power rating, bridging the gap between lower-rated and full-rated alternatives.

CZRT5241B-G from Comchip Technology provides 300 mW power rating with slightly elevated impedance (22 Ohms) and extended temperature range.

Compliance Considerations:

All recommended substitute parts are RoHS3 compliant and REACH unaffected. Parts designated with AEC-Q101 qualification (SZBZX84C11LT1G, BZX84-C11,215, BZX84-C11,235, MMBZ5241BQ-7-F) are suitable for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can BZX84C11LT1G directly replace BZX84C11_D87Z?

A: BZX84C11LT1G is electrically compatible with identical voltage and tolerance specifications. The power rating is reduced from 350 mW to 225 mW. Direct replacement is acceptable for circuits where the maximum power dissipation does not exceed 225 mW. Verify circuit power requirements before substitution.

Q: What is the difference between BZX84C11LT1G and SZBZX84C11LT1G?

A: Both parts share identical electrical specifications (11 V, ±5%, 225 mW, 20 Ω impedance). SZBZX84C11LT1G includes AEC-Q101 automotive qualification and is designated for automotive-grade applications. Selection depends on application requirements for automotive certification.

Q: Why do some substitute parts have 22 Ohm impedance instead of 20 Ohm?

A: Impedance variation within the 20-22 Ohm range is acceptable for Zener diode substitution. The 2 Ohm difference does not significantly impact voltage regulation performance in typical applications. Verify circuit impedance requirements for precision applications.

Q: Are all substitute parts available in SOT-23-3 package?

A: All listed substitute parts are available in SOT-23-3 (TO-236-3, SC-59) surface mount package, maintaining mechanical compatibility with the original BZX84C11_D87Z. Packaging format variations (Tape & Reel, Cut Tape, Bulk) do not affect electrical or mechanical compatibility.

Q: Which substitute part provides the best performance margin?

A: MMBZ5241BQ-7-F provides the highest power rating (350 mW), extended temperature range (-65°C to 150°C), AEC-Q101 automotive qualification, and active product status. This part offers maximum performance margin and formal qualification documentation.

Q: Can BZX84B11-TP replace BZX84C11_D87Z?

A: BZX84B11-TP is electrically compatible with 11 V nominal voltage and 350 mW power rating. The tolerance is ±2% (tighter than the original ±5%), and the operating temperature range matches the original (-55°C to 150°C). This part is suitable for direct replacement with improved tolerance specification.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. Parts with this qualification (SZBZX84C11LT1G, BZX84-C11,215, BZX84-C11,235, MMBZ5241BQ-7-F) are suitable for automotive applications requiring formal qualification documentation and enhanced reliability assurance.

Q: Are there inventory considerations for substitute selection?

A: Inventory availability varies by part number. BZX84C11LT1G has the highest inventory (54,400 pcs), followed by BZX84-C11,235 (30,671 pcs) and BZX84C11-7-F (35,100 pcs). Lower inventory parts (CZRT5241B-G: 872 pcs, MMBZ5241BQ-7-F: 719 pcs) may have longer lead times.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message