PLVA659A/ZLR Equivalent & Substitute Parts

Part Overview

The PLVA659A/ZLR is a Zener diode manufactured by Nexperia USA Inc., rated at 5.9 V nominal with 250 mW power dissipation capability in a surface mount TO-236AB package. This component is classified as Obsolete, indicating discontinuation from the manufacturer. Identification of equivalent and substitute parts is necessary to support ongoing design requirements, maintenance operations, and production continuity for applications utilizing this Zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.9	V
Tolerance	±4%	—
Power - Max	250	mW
Impedance (Max)	100	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 5.3 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	150	°C (TJ)
Grade	Automotive	—
Qualification	AEC-Q101	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the PLVA659A/ZLR is determined by alignment of the following critical parameters: nominal Zener voltage (5.9 V), maximum power dissipation (250 mW), package type (TO-236AB / SOT-23-3), surface mount mounting type, and automotive-grade qualification with AEC-Q101 certification.

Parametric Equivalents maintain identical or superior electrical specifications across all critical parameters while differing in packaging format (Tape & Reel) or tolerance tightness. These parts are direct functional replacements.

Similar Substitutes exhibit variations in one or more electrical parameters (Zener voltage, power rating, impedance, or leakage current) but remain compatible within the same package family and mounting technology. Selection of similar substitutes requires circuit-level validation to confirm tolerance of parameter deviations.

Parameter Comparison

Parameter	PLVA659A/ZLR	PLVA659A-QR	PLVA659A-QVL	MMBZ5233BLT1G
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	onsemi
Voltage - Zener (Nom)	5.9 V	5.9 V	5.9 V	6 V
Tolerance	±4%	±3.39%	±3.39%	±5%
Power - Max	250 mW	250 mW	250 mW	225 mW
Impedance (Max)	100 Ohms	100 Ohms	100 Ohms	7 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 5.3 V	0.9 nA @ 2.95 V	0.9 nA @ 2.95 V	5 µA @ 3.5 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	150°C (TJ)	150°C (TJ)	150°C (TJ)	-65°C ~ 150°C
Grade	Automotive	Automotive	Automotive	—
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	—
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
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

PLVA659A-QR and PLVA659A-QVL are parametric equivalents manufactured by Nexperia USA Inc. with Active product status. Both parts maintain the 5.9 V nominal Zener voltage, 250 mW power rating, and identical package configuration. These parts feature improved tolerance specifications (±3.39% versus ±4%) and significantly reduced reverse leakage current. Both retain automotive-grade classification with AEC-Q101 qualification. Selection between PLVA659A-QR and PLVA659A-QVL is determined by packaging preference (Tape & Reel format for both) and inventory availability. These are direct functional replacements for the obsolete PLVA659A/ZLR.

MMBZ5233BLT1G manufactured by onsemi is classified as a similar substitute. This part operates at 6 V nominal Zener voltage (0.1 V deviation from the 5.9 V specification) with ±5% tolerance and 225 mW maximum power dissipation (25 mW reduction). The impedance specification is significantly lower at 7 Ohms compared to 100 Ohms. This part does not carry automotive-grade designation or AEC-Q101 qualification. Selection of MMBZ5233BLT1G requires circuit-level analysis to confirm tolerance of the voltage deviation, power rating reduction, and impedance characteristics. This substitute is suitable only for non-automotive applications or where the specified parameter variations are acceptable.

Frequently Asked Questions (FAQ)

Q: Can PLVA659A-QR and PLVA659A-QVL be used interchangeably with PLVA659A/ZLR?

A: Yes. Both parts are parametric equivalents with identical nominal Zener voltage (5.9 V), power rating (250 mW), and package configuration (TO-236AB). The primary differences are improved tolerance (±3.39% versus ±4%), reduced reverse leakage current, and Active product status. Both maintain automotive-grade qualification and AEC-Q101 certification.

Q: What is the difference between PLVA659A-QR and PLVA659A-QVL?

A: Both parts are electrically identical with matching specifications. The designation difference reflects packaging or qualification variants. Inventory availability and supplier packaging preferences determine selection between these two options.

Q: Is MMBZ5233BLT1G a direct replacement for PLVA659A/ZLR?

A: No. MMBZ5233BLT1G is a similar substitute with parameter deviations. The nominal Zener voltage is 6 V (not 5.9 V), maximum power dissipation is 225 mW (not 250 mW), and impedance is 7 Ohms (not 100 Ohms). Additionally, this part lacks automotive-grade designation and AEC-Q101 qualification. Use of this substitute requires circuit validation to confirm tolerance of these deviations.

Q: Are all substitute parts available in the same package?

A: Yes. All listed parts utilize the TO-236-3 / SC-59 / SOT-23-3 package family, enabling mechanical and electrical compatibility at the board level. Packaging format differences (Tape & Reel versus bulk) do not affect functional performance.

Q: What compliance certifications apply to the substitute parts?

A: PLVA659A-QR and PLVA659A-QVL maintain ROHS3 compliance, REACH Unaffected status, and automotive-grade AEC-Q101 qualification identical to the original part. MMBZ5233BLT1G is ROHS3 compliant and REACH Unaffected but does not carry automotive-grade or AEC-Q101 designation.

Q: Why is the original PLVA659A/ZLR marked as Obsolete?

A: Obsolete status indicates manufacturer discontinuation. Nexperia USA Inc. has transitioned to the Active PLVA659A-QR and PLVA659A-QVL variants, which offer improved electrical characteristics and continued production support.

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