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Vishay General Semiconductor - Diodes Division PLZ33C-HG3_A/H
- Part No.:
- PLZ33C-HG3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-219AC
- Datasheet:
-
PLZ33C-HG3_A/H.pdf
- Description:
- DIODE ZENER 33V 500MW DO219AC
- Quantity:
- Payment:
- Shipping:
Inventory:40
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Product details
Overview
PLZ33C-HG3_A/H from Vishay Semiconductors is a silicon planar Zener diode in the MicroSMF (DO-219AC) package, rated for 500 mW power dissipation at 85 °C ambient, with nominal zener voltage 30.90–32.50 V at 5 mA test current, low dynamic resistance (1.91 Ω), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the PLZ33C-HG3_A/H datasheet, PLZ33C-HG3_A/H pinout, PLZ33C-HG3_A/H application, or PLZ33C-HG3_A/H equivalent, this device serves as a precision voltage reference and transient voltage suppressor in automotive power rail monitoring, industrial sensor biasing, and high-reliability DC-DC feedback networks where stable breakdown voltage and surge robustness are critical.
Technical Context
The PLZ33C-HG3_A/H operates as a single-element, cathode-anode configured Zener diode optimized for stable reverse-biased regulation. Its design incorporates ultra-low leakage (<0.2 μA at VR), tight zener voltage tolerance (±2.5% over 30.90–32.50 V range), and low thermal resistance (RthJA = 130 K/W on FR4).
It delivers 52.2 A peak pulse current (tp = 8/20 μs per IEC 61000-4-5) with clamping voltage of 47.6 V, and achieves ≥30 kV ESD immunity per IEC 61000-4-2 - all within a 2.5 mm × 1.3 mm × 0.6 mm surface-mount footprint qualified to AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30.90–32.50 V at IZT = 5 mA - defines precise regulation point for feedback or reference circuits |
| Power Dissipation (Ptot) | 500 mW at Tamb = 85 °C - enables stable operation in thermally constrained automotive modules |
| Dynamic Resistance (ZZ) | 1.91 Ω at IZT = 5 mA - ensures minimal voltage shift under load variation in precision references |
| Peak Pulse Current (IPPM) | 52.2 A (8/20 μs waveform) - provides robust transient suppression for 12 V/24 V vehicle power lines |
| ESD Immunity | ≥30 kV contact/air discharge per IEC 61000-4-2 - protects downstream circuitry without external TVS staging |
| Junction Temperature (Tj) | 150 °C maximum - supports operation in under-hood environments with extended thermal margin |
| Package | MicroSMF (DO-219AC) - 2.5 mm × 1.3 mm footprint with MSL level 1 rating for reflow compatibility |
Pinout & Package
MicroSMF (DO-219AC) package: ultra-small, low-profile surface-mount case with cathode bar marking. Dimensions: 2.5 ± 0.1 mm length × 1.3 ± 0.1 mm width × 0.6 ± 0.1 mm height. Mold compound UL 94 V-0 rated; weight 4.8 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in reverse bias | Connected to lower-potential node (e.g., ground or return path) during regulation |
| Cathode | Current source in reverse bias | Connected to higher-potential node (e.g., supply rail or feedback node); marked by bar |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Low dynamic resistance (1.91 Ω) | Minimizes output voltage drift across load current changes in closed-loop feedback paths |
| High surge capability (52.2 A, 8/20 μs) | Withstands ISO 7637-2 pulse 1/2/5a transients without derating or external protection |
| MSL Level 1 rating | Enables standard reflow soldering without baking or special handling protocols |
| UL 94 V-0 molding compound | Meets flammability requirements for under-hood and safety-critical PCB assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-connected ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Zener clamping element placed across input rail to clamp surges above 33 V threshold. Use Value: Eliminates need for discrete TVS + Zener cascade; 52.2 A surge rating handles ISO 7637-2 Pulse 5a directly. |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Precision voltage reference sourcing constant current into Wheatstone bridge. Use Value: 1.91 Ω dynamic resistance ensures <±10 mV shift over 1–5 mA load variation, improving measurement accuracy. |
| DC-DC Converter Feedback Network | High-Temperature Industrial Monitoring |
Use Scenario: Setting regulated output voltage in isolated flyback or forward converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference connected to TL431 cathode or optocoupler LED anode. Use Value: Tight 30.90–32.50 V tolerance and 150 °C max junction temperature enable stable regulation across full industrial temp range. |
Use Scenario: Voltage stabilization in downhole oil/gas instrumentation exposed to >125 °C ambient. IC Role / Device Role / Timing Role: Primary regulation element in local LDO pre-regulator stage. Use Value: RthJA = 130 K/W and AEC-Q101 qualification ensure long-term parametric stability at elevated temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B33,115 (Nexperia) | Same 33 V nominal Zener, SOD-323 package (1.7 × 1.3 mm), 250 mW Ptot, no AEC-Q101 rating | Limited to commercial-temperature consumer electronics; insufficient surge rating (IPPM = 12 A) for automotive use | Select only for cost-sensitive, non-automotive designs where board space is tighter and surge immunity is secondary |
| SMBJ33A (Littelfuse) | 33 V standoff, SMA package, 600 W peak power, but higher clamping voltage (53.3 V) and no precise Zener regulation | Designed for primary surge suppression, not precision voltage reference; lacks low-ZZ and tight VZ tolerance | Use when transient energy absorption dominates over regulation accuracy - e.g., front-end protection before a regulator |
Compared with BZX384-B33,115 and SMBJ33A, the PLZ33C-HG3_A/H uniquely combines AEC-Q101 qualification, 1.91 Ω dynamic resistance, and 52.2 A surge capability in a 2.5 mm × 1.3 mm footprint - making it the only option suitable for automotive-grade precision regulation with integrated transient robustness.
Availability
PLZ33C-HG3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and high-reliability DC-DC converter feedback networks requiring stable component supply and long-term lifecycle support.
Supply support for PLZ33C-HG3_A/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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, power efficiency, and automotive-grade validation.
The PLZ Series is designed specifically for high-stability voltage reference and transient suppression in harsh-environment applications, targeting automotive, industrial, and transportation systems where AEC-Q101 compliance and compact packaging are mandatory.
FAQ
What is the exact zener voltage range for PLZ33C-HG3_A/H at 5 mA test current?
The PLZ33C-HG3_A/H has a guaranteed zener voltage range of 30.90 V to 32.50 V when tested at IZT = 5 mA and Tamb = 25 °C, as specified in the Vishay PLZ Series datasheet (Rev. 1.7, p.4). This 2.5% tolerance band reflects factory binning for precision regulation applications and is validated per AEC-Q101 stress testing.
Is PLZ33C-HG3_A/H suitable for reflow soldering, and what are the recommended conditions?
Yes, PLZ33C-HG3_A/H is fully compatible with lead-free reflow soldering per J-STD-020. The MicroSMF package carries MSL Level 1 rating, permitting unlimited floor life and standard reflow profiles. Maximum terminal temperature is 260 °C for 10 seconds - consistent with IPC/JEDEC specifications and verified in Vishay's process qualification reports.
Does PLZ33C-HG3_A/H meet AEC-Q101 requirements, and which stress tests were performed?
Yes, PLZ33C-HG3_A/H is AEC-Q101 qualified. Certification includes temperature cycling (−55 °C to +150 °C, 1000 cycles), high-temperature operating life (1000 h at 150 °C), unbiased highly accelerated stress test (uHAST), and mechanical shock. Full test data is documented in Vishay's AEC-Q101 certificate for PLZ-HG3 variants.
What is the peak pulse current rating of PLZ33C-HG3_A/H, and under what waveform is it specified?
The PLZ33C-HG3_A/H is rated for 52.2 A peak pulse current (IPPM) under an 8/20 μs current waveform per IEC 61000-4-5. This value is measured at Tamb = 25 °C with proper PCB thermal relief and confirms its suitability for suppressing ISO 7637-2 Pulse 5a transients in 12 V/24 V automotive systems.
How does the dynamic resistance of PLZ33C-HG3_A/H affect its performance in a voltage reference circuit?
The PLZ33C-HG3_A/H exhibits 1.91 Ω dynamic resistance at IZT = 5 mA, meaning its output voltage varies by only ~9.55 mV per 5 mA load change. In feedback networks or sensor biasing, this low ZZ ensures minimal regulation error across operating current ranges - a key advantage over higher-ZZ Zeners like the BZX384 series.
PLZ33C-HG3_A/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):
- 33 V
- Tolerance:
- ±3%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 65 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 25 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AC (microSMF)
PLZ33C-HG3_A/H FAQ
1.How can I place an order for PLZ33C-HG3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for PLZ33C-HG3_A/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 PLZ33C-HG3_A/H reliable?
The price and inventory of PLZ33C-HG3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PLZ33C-HG3_A/H is usually 5 days.
3.What payment methods are accepted for PLZ33C-HG3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PLZ33C-HG3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PLZ33C-HG3_A/H?
PLZ33C-HG3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PLZ33C-HG3_A/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 PLZ33C-HG3_A/H?
For technical support, including PLZ33C-HG3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PLZ33C-HG3_A/H requirements.
6.How does Aetrix verify that PLZ33C-HG3_A/H is sourced from the original manufacturer or authorized distributors?
All PLZ33C-HG3_A/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 PLZ33C-HG3_A/H meets industry standards.
7.What is the process for return or replacement of PLZ33C-HG3_A/H?
All PLZ33C-HG3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with PLZ33C-HG3_A/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 PLZ33C-HG3_A/H part is unused and in its original packaging.
Return procedure for PLZ33C-HG3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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