BZX84C24_D87Z Equivalent & Substitute Parts

Part Overview

The BZX84C24_D87Z is a 24 V Zener diode manufactured by onsemi, rated for 350 mW power dissipation in a surface mount SOT-23-3 package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Equivalent and substitute parts are necessary to maintain design continuity and ensure reliable component sourcing for production and repair applications.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	24 V
Tolerance	±6%
Power - Max	350 mW
Impedance (Max)	70 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3

Substitute Part Grouping Explanation

Substitution of the BZX84C24_D87Z is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 24 V (nominal)
Package type: SOT-23-3 / TO-236-3 / SC-59 (surface mount)
Impedance: 70 Ohms (maximum)
Reverse leakage current: 50 nA @ 16.8 V
Forward voltage: 900 mV @ 10 mA

Secondary Considerations:

Power rating: 350 mW (main part specification)
Voltage tolerance: ±6% (main part specification)
Operating temperature range: -55°C ~ 150°C (main part specification)

Substitute parts are grouped into two categories:

Category 1 - Direct Functional Equivalents: Parts with identical or superior electrical characteristics and active product status, suitable for direct replacement in new designs and production.

Category 2 - Parametric Equivalents: Parts with minor variations in power rating, tolerance, or temperature range that remain functionally compatible within the specified electrical parameters.

Parameter Comparison

Parameter	BZX84C24_D87Z (Main)	BZX84C24LT1G	BZX84-C24,215	BZX84-C24,235	BZX84C24-TP
Manufacturer	onsemi	onsemi	NXP Semiconductors	Nexperia USA Inc.	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Zener (Nom)	24 V	24 V	24 V	24 V	24 V
Tolerance	±6%	±6%	±5%	±5%	±5%
Power - Max	350 mW	225 mW	250 mW	250 mW	350 mW
Impedance (Max)	70 Ohms	70 Ohms	70 Ohms	70 Ohms	70 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 16.8 V	50 nA @ 16.8 V	50 nA @ 16.8 V	50 nA @ 16.8 V	100 nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	Not specified	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	Not specified	Not specified	AEC-Q101	AEC-Q101	Not specified

Engineering Selection Recommendations

BZX84C24LT1G (onsemi)

This substitute is an active product from the original manufacturer with identical electrical characteristics to the main part. The BZX84C24LT1G maintains the same 24 V nominal voltage, 70 Ohm impedance, and forward voltage specifications. The power rating is reduced to 225 mW, which represents a design constraint for applications requiring the full 350 mW capability. The operating temperature range extends to -65°C, providing enhanced low-temperature performance. This part is suitable for applications where the lower power rating is acceptable and where continuity with the original manufacturer is preferred.

BZX84-C24,215 (NXP Semiconductors)

This substitute is an active product with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. The electrical characteristics align with the main part, with a nominal 24 V voltage and 70 Ohm impedance. The power rating is 250 mW, which is lower than the main part specification. The voltage tolerance is ±5%, providing tighter specification than the main part. The operating temperature range extends to -65°C. This part is suitable for automotive applications and designs requiring enhanced environmental compliance.

BZX84-C24,235 (Nexperia USA Inc.)

This substitute is an active product with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Electrical characteristics are identical to BZX84-C24,215, with 24 V nominal voltage, 70 Ohm impedance, and 250 mW power rating. The voltage tolerance is ±5%. The operating temperature range extends to -65°C. This part is suitable for automotive applications and represents an alternative source for the NXP Semiconductors variant.

BZX84C24-TP (Micro Commercial Co)

This substitute is an active product with ROHS3 compliance. The electrical characteristics match the main part specification with 24 V nominal voltage, 350 mW power rating, and 70 Ohm impedance. The voltage tolerance is ±5%. The reverse leakage current is specified at 100 nA @ 16.8 V, which is higher than the main part specification of 50 nA. The operating temperature range matches the main part at -55°C ~ 150°C. This part is suitable for applications requiring the full 350 mW power capability and where the higher reverse leakage current is acceptable.

Frequently Asked Questions (FAQ)

Q: Can BZX84C24LT1G replace BZX84C24_D87Z in all applications?

A: BZX84C24LT1G is electrically compatible with the main part for applications where the power dissipation does not exceed 225 mW. The nominal voltage, impedance, and forward voltage characteristics are identical. Applications requiring the full 350 mW power capability require evaluation of actual power dissipation in the circuit.

Q: What is the difference between the NXP parts BZX84-C24,215 and BZX84-C24,235?

A: Both parts are functionally identical with the same electrical specifications. The difference is in packaging and supplier designation. BZX84-C24,215 is supplied in bulk packaging, while BZX84-C24,235 is supplied in tape and reel format. Both are automotive-grade with AEC-Q101 qualification.

Q: Is BZX84C24-TP suitable for applications requiring low reverse leakage current?

A: BZX84C24-TP has a reverse leakage current specification of 100 nA @ 16.8 V, which is higher than the main part specification of 50 nA. Applications with strict reverse leakage requirements should use BZX84C24LT1G or the NXP variants (BZX84-C24,215 or BZX84-C24,235).

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

A: All substitute parts are available in TO-236-3, SC-59, or SOT-23-3 packaging designations, which are equivalent surface mount packages. The physical footprint and pin configuration are identical across all listed parts.

Q: Which substitute part is recommended for new automotive designs?

A: BZX84-C24,215 and BZX84-C24,235 are recommended for automotive applications due to AEC-Q101 qualification and automotive-grade designation. Both parts meet automotive reliability and environmental standards.

Q: What is the impact of voltage tolerance differences between parts?

A: The main part specifies ±6% tolerance, while substitute parts BZX84-C24,215, BZX84-C24,235, and BZX84C24-TP specify ±5% tolerance. The tighter tolerance in substitute parts provides improved voltage regulation accuracy. Applications with strict voltage regulation requirements benefit from the ±5% tolerance specification.

Q: Can BZX84C24-TP be used as a direct replacement for the obsolete BZX84C24_D87Z?

A: BZX84C24-TP is functionally compatible with the main part for applications where the reverse leakage current specification of 100 nA is acceptable. The power rating and operating temperature range are identical. The voltage tolerance is ±5% compared to ±6% for the main part, which is an improvement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message