Equivalent & Substitute Parts for PZM24NB3,115 Zener Diode

Part Overview

PZM24NB3,115 is a Zener diode manufactured by NXP USA Inc. in the Diodes, Zener product category. It features a nominal Zener voltage of 24 V, 300 mW maximum power dissipation, ±2% tolerance, and is packaged for surface mount in a TO-236-3, SC-59, or SOT-23-3 package (SMT3, MPAK). This part is currently classified as "Obsolete," necessitating the identification of equivalent or substitute models for ongoing designs, maintenance, or production continuity.

Key Parameters

Parameter	PZM24NB3,115
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	24 V
Tolerance	±2%
Power - Max	300 mW
Impedance (Max) (Zzt)	30 Ohms
Current - Reverse Leakage @ Vr	70 nA @ 19 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SMT3; MPAK
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution for the PZM24NB3,115 Zener diode is determined exclusively by matching or closely aligning the following allowed electrical and mechanical parameters:

Zener voltage (nominal) and tolerance
Power handling capability (maximum power dissipation)
Maximum impedance (Zzt)
Reverse leakage current at specified voltage
Maximum forward voltage at test current
Operating temperature range
Package compatibility (TO-236-3, SC-59, SOT-23-3 or equivalent)
Mounting type (surface mount)
Compliance (RoHS, MSL, REACH, ECCN)

Only parts matching these factors are included as valid substitutes.

Parameter Comparison

Parameter	PZM24NB3,115 NXP USA Inc.	BZX84B24-7-F Diodes Inc.	BZX84-B24,215 NXP Semiconductors
Category	Diodes, Zener	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	24 V	24 V	24 V
Tolerance	±2%	±2%	±2%
Power - Max	300 mW	300 mW	250 mW
Impedance (Max) (Zzt)	30 Ohms	70 Ohms	70 Ohms
Current - Reverse Leakage @ Vr	70 nA @ 19 V	100 nA @ 16.8 V	50 nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
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
Supplier Device Package	SMT3; MPAK	SOT-23-3	TO-236AB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The main part, PZM24NB3,115, is classified as Obsolete. Substitute parts BZX84B24-7-F (Diodes Incorporated) and BZX84-B24,215 (NXP Semiconductors) are both Active. All compared diodes are ROHS3 Compliant, with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status. ECCN is EAR99 for all parts. Select a substitute that is Active and matches the required compliance and packaging constraints.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for selecting a substitute Zener diode?
A: Substitute selection is based on matching Zener voltage, tolerance, power dissipation, impedance, leakage current, forward voltage, operating temperature, package type, mounting method, and compliance status.

Q: Are there package or mounting compatibility considerations?
A: Yes, only diodes with TO-236-3, SC-59, or SOT-23-3 surface mount packages are included as substitutes to maintain form factor and board compatibility.

Q: How does power dissipation affect substitution?
A: Substitute parts must meet or exceed the maximum power dissipation of the original component, or match the system requirements if lower.

Q: Are compliance certifications such as RoHS and REACH important?
A: Yes, substitutes must hold equivalent compliance statuses: ROHS3 Compliant, REACH Unaffected, and have the same MSL and ECCN classifications.

Q: Is it necessary to consider the status of the substitute part?
A: Yes, selecting a part with Active status is preferred to ensure long-term availability and supply chain stability.

Q: Can impedance (Zzt) differences influence interchangeability?
A: Impedance must be within the acceptable range for the application; only parts meeting listed values are considered equivalent.

Q: Is the forward voltage parameter critical in substitution?
A: Forward voltage is included in the comparison and must be similar for direct substitution to preserve electrical characteristics in-circuit.

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