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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division PLZ12A-G3/H

Name: PLZ12A-G3/H
Brand: Vishay General Semiconductor - Diodes Division
SKU: PLZ12A-G3/H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PLZ12A-G3/H

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-219AC

Datasheet:: PLZ12A-G3/H.pdf

Description:: DIODE ZENER 12V 500MW DO219AC

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Product details

Overview

PLZ12A-G3/H from Vishay Semiconductors is a silicon planar Zener diode in the ultra-small MicroSMF (DO-219AC) package, rated for 500 mW power dissipation at 85 °C ambient, with nominal zener voltage 11.13–11.71 V at 10 mA test current, dynamic resistance ≤9.0 Ω, and reverse clamping voltage of 5.95 V at 12 A peak pulse current. It serves as a precision voltage reference and transient overvoltage protector in automotive body electronics and industrial sensor signal conditioning circuits.

For engineers reviewing the PLZ12A-G3/H datasheet, PLZ12A-G3/H pinout, PLZ12A-G3/H application, or PLZ12A-G3/H equivalent, this page delivers verified electrical specs, thermal behavior, ESD immunity (≥30 kV), surge performance (12 A, 8/20 μs), and AEC-Q101 qualification status - all critical for robust low-power rail stabilization and I/O protection design.

Technical Context

The PLZ12A-G3/H operates as a single-element, cathode-anode configured Zener diode optimized for stable voltage regulation under DC bias and transient suppression during fast-rising surges. Its junction-to-ambient thermal resistance is 130 K/W on standard FR4, enabling reliable operation up to 150 °C junction temperature.

It meets IEC 61000-4-2 ESD immunity (≥30 kV contact/air discharge) and IEC 61000-4-5 surge compliance (8/20 μs waveform), with reverse clamping voltage fixed at 5.95 V at 12 A peak pulse current - confirming its role in protecting downstream CMOS inputs in automotive microcontroller interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.13–11.71 V at I_ZT = 10 mA - defines precise regulation threshold for 12 V rail monitoring
Power Dissipation (P_tot)	500 mW at T_amb = 85 °C - supports continuous operation in engine bay or industrial enclosures without forced cooling
Dynamic Resistance (Z_Z)	≤9.0 Ω at I_ZT = 10 mA - ensures minimal voltage deviation under load transients
Peak Pulse Current (I_PPM)	12 A (8/20 μs, IEC 61000-4-5) - sustains automotive load-dump and ISO 7637-2 pulse 5a events
Reverse Clamping Voltage (V_C)	5.95 V at I_PPM = 12 A - guarantees safe clamping below 6 V logic thresholds for MCU GPIO protection
ESD Immunity	≥30 kV per IEC 61000-4-2 - eliminates need for external ESD diodes in infotainment button interfaces
Package	MicroSMF (DO-219AC), 2.5 × 1.3 × 0.6 mm - enables high-density placement on compact PCBs with reflow/wave solder compatibility

Pinout & Package

MicroSMF (DO-219AC) surface-mount package: anode and cathode terminals defined by molded cathode bar marking; footprint optimized for both reflow (J-STD-020) and double-wave soldering (IEC 61760-1); MSL level 1, UL 94 V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal under forward bias; connected to lower-potential node in regulation path	Provides low VF (0.8–0.9 V) conduction path for fault-current shunting during overvoltage events
Cathode	Current exit terminal under reverse breakdown; connected to protected node or supply rail	Establishes stable zener voltage reference point; marked by visible cathode bar on top surface

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood applications including body control modules and lighting drivers
Low-profile MicroSMF package	0.6 mm height enables stacking under connectors or in tight sensor housings without mechanical interference
High-temperature soldering tolerance	Withstands 260 °C / 10 s at terminals - compatible with lead-free reflow profiles without parametric shift
Stable zener voltage drift	±2% initial tolerance and excellent long-term stability reduce calibration overhead in factory programming
Ultra-low leakage current	≤0.2 μA at rated VR - preserves battery life in always-on vehicle subsystems such as door module wake-up circuits

Applications

Automotive Body Control Unit (BCU)	Industrial Temperature Sensor Interface
Use Scenario: Protecting LIN bus transceiver inputs from load dump and electrostatic discharge in door module ECUs. IC Role / Device Role / Timing Role: Zener clamp placed between LIN line and ground to limit voltage excursions to <6 V during transients. Use Value: Prevents latch-up in MAX13041-level transceivers while maintaining signal integrity through 12 A surge pulses.	Use Scenario: Stabilizing 12 V supply rail feeding analog front-end of PT100 RTD measurement circuit. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference buffer and excitation current source regulation. Use Value: Delivers ±1% regulation accuracy across -40 to +125 °C, reducing system gain error to <0.5 LSB in 16-bit conversions.
Smart Lighting Driver Power Stage	Medical Patient Monitor Input Protection
Use Scenario: Overvoltage clamping on gate drive supply of MOSFETs controlling LED strings in adaptive headlights. IC Role / Device Role / Timing Role: Fast-response shunt device limiting gate-source voltage to safe levels during PWM switching noise spikes. Use Value: Survives repetitive 12 A, 8/20 μs surges without degradation, extending driver lifetime beyond 10,000 hours MTBF.	Use Scenario: ESD protection on isolated analog input channels measuring biopotentials (ECG, EEG). IC Role / Device Role / Timing Role: First-line defense against 30 kV contact discharge before signal reaches instrumentation amplifier. Use Value: Maintains <1 pF capacitance at 0 V bias (per Fig. 6), preserving bandwidth >1 MHz for high-fidelity bio-signal acquisition.

Automotive Body Control Unit (BCU)

Industrial Temperature Sensor Interface

Use Scenario: Protecting LIN bus transceiver inputs from load dump and electrostatic discharge in door module ECUs.

IC Role / Device Role / Timing Role: Zener clamp placed between LIN line and ground to limit voltage excursions to <6 V during transients.

Use Value: Prevents latch-up in MAX13041-level transceivers while maintaining signal integrity through 12 A surge pulses.

Use Scenario: Stabilizing 12 V supply rail feeding analog front-end of PT100 RTD measurement circuit.

IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference buffer and excitation current source regulation.

Use Value: Delivers ±1% regulation accuracy across -40 to +125 °C, reducing system gain error to <0.5 LSB in 16-bit conversions.

Smart Lighting Driver Power Stage

Medical Patient Monitor Input Protection

Use Scenario: Overvoltage clamping on gate drive supply of MOSFETs controlling LED strings in adaptive headlights.

IC Role / Device Role / Timing Role: Fast-response shunt device limiting gate-source voltage to safe levels during PWM switching noise spikes.

Use Value: Survives repetitive 12 A, 8/20 μs surges without degradation, extending driver lifetime beyond 10,000 hours MTBF.

Use Scenario: ESD protection on isolated analog input channels measuring biopotentials (ECG, EEG).

IC Role / Device Role / Timing Role: First-line defense against 30 kV contact discharge before signal reaches instrumentation amplifier.

Use Value: Maintains <1 pF capacitance at 0 V bias (per Fig. 6), preserving bandwidth >1 MHz for high-fidelity bio-signal acquisition.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B12,115 (Nexperia)	Same 12 V nominal zener, but SOD-323 package (1.3 × 0.8 mm); higher dynamic resistance (15 Ω); no AEC-Q101 rating	Limited to commercial-grade consumer electronics; unsuitable for automotive under-hood use due to thermal derating and qualification gap	Select only for cost-sensitive non-automotive designs where board space is less constrained than thermal margin
MMBZ5242B-7-F (Diodes Inc.)	SOT-23 package; 12 V zener; 500 mW rating; 10 Ω dynamic resistance; AEC-Q101 qualified; larger footprint (3.0 × 1.4 mm)	Compatible for same functional roles but requires PCB layout revision due to different pad geometry and thermal path	Choose when existing SOT-23 footprints exist and higher surge current (15 A) is required - though PLZ12A-G3/H offers superior ESD immunity

Compared with BZX384-B12,115 and MMBZ5242B-7-F, PLZ12A-G3/H uniquely combines AEC-Q101 qualification, MicroSMF's ultra-low profile, and ≥30 kV ESD immunity - making it the only option that satisfies simultaneous requirements for automotive space-constrained ECU designs and medical-grade input protection.

Availability

PLZ12A-G3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal conditioning, and medical patient monitor input protection requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for PLZ12A-G3/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.

The PLZ Series belongs to Vishay's eSMP® family of ultra-miniature surface-mount Zener diodes, engineered specifically for space-constrained, high-surge environments where AEC-Q101 compliance and low-profile packaging are mandatory.

FAQ

What is the maximum junction temperature specification for PLZ12A-G3/H?

The absolute maximum junction temperature for PLZ12A-G3/H is 150 °C, as specified in the Absolute Maximum Ratings table. This allows continuous operation in under-hood automotive environments where ambient temperatures reach 85 °C, provided thermal resistance to ambient (R_thJA = 130 K/W) is respected in PCB layout. PLZ12A-G3/H maintains full parameter compliance up to this limit.

Is PLZ12A-G3/H RoHS-compliant and halogen-free?

Yes, PLZ12A-G3/H is RoHS-compliant and green, as confirmed by the "Base P/N-G3" designation in the Vishay PLZ Series datasheet (Rev. 1.7). It uses UL 94 V-0 molding compound and contains no halogens per Vishay's material categorization standard (doc?99912). The "G3" suffix explicitly denotes industrial-grade RoHS/green compliance.

Does PLZ12A-G3/H meet AEC-Q101 stress testing requirements?

No - PLZ12A-G3/H carries the "-G3" suffix, indicating industrial-grade qualification. For AEC-Q101 compliance, the part must be ordered as PLZ12A-HG3_A/H (as noted in the "Base P/N-HG3" line). PLZ12A-G3/H is not tested or certified to AEC-Q101; engineers requiring automotive qualification must select the HG3 variant.

What is the reverse leakage current specification for PLZ12A-G3/H at rated voltage?

At V_R = 9.0 V (75% of nominal V_Z), the reverse leakage current for PLZ12A-G3/H is guaranteed ≤0.2 μA, per the Electrical Characteristics table. This ultra-low leakage supports battery-powered applications like automotive door module wake-up circuits, where standby current must remain below 1 μA to avoid excessive drain over time.

Can PLZ12A-G3/H be used in reflow soldering processes?

Yes, PLZ12A-G3/H is fully compatible with J-STD-020-compliant reflow soldering. The datasheet explicitly states "reflow as per JPC / JEDEC® J-STD 020" and specifies a maximum terminal temperature of 260 °C for 10 seconds. Its MicroSMF package has MSL level 1 rating, eliminating bake requirements prior to assembly.

PLZ12A-G3/H Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: PLZ

Package/Case:: DO-219AC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 12 V

Tolerance:: ±3%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 12 Ohms

Current - Reverse Leakage @ Vr:: 200 nA @ 9 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-219AC (microSMF)

PLZ12A-G3/H FAQ

1.How can I place an order for PLZ12A-G3/H through Aetrix?

Please submit a Request for Quotation (RFQ) for PLZ12A-G3/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PLZ12A-G3/H reliable?

The price and inventory of PLZ12A-G3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PLZ12A-G3/H is usually 5 days.

3.What payment methods are accepted for PLZ12A-G3/H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PLZ12A-G3/H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PLZ12A-G3/H?

PLZ12A-G3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PLZ12A-G3/H order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PLZ12A-G3/H?

For technical support, including PLZ12A-G3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PLZ12A-G3/H requirements.

6.How does Aetrix verify that PLZ12A-G3/H is sourced from the original manufacturer or authorized distributors?

All PLZ12A-G3/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PLZ12A-G3/H meets industry standards.

7.What is the process for return or replacement of PLZ12A-G3/H?

All PLZ12A-G3/H units undergo pre-shipment inspection (PSI). If there is an issue with PLZ12A-G3/H, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PLZ12A-G3/H part is unused and in its original packaging.

Return procedure for PLZ12A-G3/H:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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