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Nexperia USA Inc. PDZ12BZ
- Part No.:
- PDZ12BZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ12BZ.pdf
- Description:
- DIODE ZENER 12V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,834
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Product details
Overview
PDZ12BZ from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in compact SMD applications, with a nominal Zener voltage of 12 V (11.74–12.24 V at IZ = 5 mA), ±2 % tolerance, 80 Ω maximum differential resistance, 0.1 μA reverse current at VR = 9.0 V, and 3.0 A non-repetitive peak reverse current. It operates in general-purpose power supply rail clamping and reference circuits on consumer and industrial PCBs.
For engineers reviewing the PDZ12BZ datasheet, PDZ12BZ pinout, PDZ12BZ application, or PDZ12BZ equivalent, this device is selected for precision low-current voltage referencing, ESD-robust signal line clamping, and space-constrained biasing where thermal resistance (Rth(j-a) = 340 K/W) and SOD323 footprint compatibility are critical design constraints.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode-anode terminals when reverse-biased above its breakdown threshold. Its hard breakdown knee and low leakage (<0.1 μA at 9.0 V) support clean turn-on behavior in low-quiescent-current designs.
Thermal performance is defined by junction-to-ambient resistance of 340 K/W on FR4 PCB with single-sided copper, and junction-to-solder-point resistance of 130 K/W - enabling predictable derating up to 150 °C junction temperature under controlled board layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.74–12.24 V at IZ = 5 mA - defines precise clamping level for 12 V rail protection or reference generation |
| Differential Resistance (rdif) | ≤ 80 Ω - ensures minimal voltage shift under load variation, critical for stable reference accuracy |
| Reverse Current (IR) | ≤ 0.1 μA at VR = 9.0 V - enables ultra-low standby power in battery-backed or energy-sensitive circuits |
| Total Power Dissipation (Ptot) | 400 mW at Tamb ≤ 25 °C - sets maximum continuous dissipation before thermal derating begins |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - supports use as forward-biased clamp or logic-level indicator without excessive drop |
| Non-repetitive Peak Reverse Current (IZSM) | 3.0 A for tp = 100 μs - provides transient surge immunity for ESD and inductive kick suppression |
| Temperature Coefficient (SZ) | +8.4 mV/K at IZ = 5 mA - quantifies positive drift per degree, essential for temperature-compensated reference design |
Pinout & Package
PDZ12BZ is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 × 1.35 × 0.95 mm, with cathode identified by a marking bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance at low currents | 80 Ω max at 5 mA - improves regulation stability in micro-power sensor bias networks |
| Hard breakdown knee | Sharp, well-defined VZ transition - reduces ambiguity in threshold detection for overvoltage protection |
| Very low leakage current | 0.1 μA at 9.0 V - minimizes parasitic loading in high-impedance feedback or timing circuits |
| SOD323 footprint compatibility | Standardized 1.8 × 1.35 mm outline with 0.6 mm solder land pitch - ensures drop-in replacement and automated assembly reliability |
| Wide operating temperature range | −65 °C to +150 °C storage; rated junction operation to +150 °C - supports deployment in automotive under-hood and industrial environments |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Clamping 5 V USB data or VBUS lines against ESD transients and accidental 12 V misconnection. IC Role / Device Role / Timing Role: Shunt clamping element placed between signal line and ground, conducting only during overvoltage events. Use Value: 3.0 A IZSM rating absorbs 100 μs surges without degradation; 0.1 μA leakage avoids signal integrity impact during normal operation. |
Use Scenario: Providing a stable 12 V reference for external reset supervisor ICs monitoring system power rails. IC Role / Device Role / Timing Role: Precision voltage reference source feeding the input of a reset generator or comparator. Use Value: ±2 % VZ tolerance and +8.4 mV/K temperature coefficient enable predictable reset threshold calibration across −40 °C to +85 °C. |
| Low-Power Sensor Bias Network | Industrial PLC Input Signal Conditioning |
|
Use Scenario: Biasing analog front-end components (e.g., op-amp inputs, ADC references) in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing stable local reference voltage. Use Value: 400 mW Ptot and 80 Ω rdif allow stable 12 V reference at <1 mA, minimizing quiescent drain on coin-cell or Li-SOCl₂ batteries. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field-wiring faults and induced surges. IC Role / Device Role / Timing Role: Primary clamping device in series with current-limiting resistor on discrete input stage. Use Value: Hard breakdown knee ensures fast response to >12 V transients; SOD323 package allows dense channel spacing on DIN-rail mounted I/O modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C12 | Same 12 V nominal VZ, but ±5 % tolerance and higher rdif (120 Ω); SOD523 package (smaller, 1.2 × 0.8 mm) | Limited to less demanding reference accuracy; tighter board space constraints | Select when footprint size is prioritized over regulation precision and thermal margin |
| MMSZ5242B | 12 V nominal VZ, ±5 % tolerance, 90 Ω rdif, 500 mW Ptot; SOD123 package (larger, 2.7 × 1.6 mm) | Higher power handling but larger PCB area; less suitable for ultra-dense layouts | Select when higher continuous power (e.g., 300 mW sustained) is required and board space permits |
Compared with BZX584-C12 and MMSZ5242B, PDZ12BZ delivers superior voltage accuracy (±2 % vs. ±5 %), lower dynamic impedance (80 Ω vs. ≥90 Ω), and optimal thermal-mechanical balance in the SOD323 package - making it preferred for precision, space-constrained, and thermally managed designs.
Availability
PDZ12BZ is available at Aetrix Electronics and suitable for USB port protection, microcontroller reset supervision, low-power sensor biasing, and industrial PLC input conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for PDZ12BZ 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability standard products including logic, discretes, MOSFETs, and bipolar transistors - headquartered in Nijmegen, Netherlands.
PDZ12BZ belongs to the PDZ-B series of low-power Zener diodes engineered for general-purpose voltage regulation in space-constrained, surface-mounted applications - emphasizing tight tolerance, low leakage, and robust surge capability.
FAQ
What is the maximum continuous reverse current PDZ12BZ can sustain at 25 °C ambient?
The PDZ12BZ does not specify a maximum continuous reverse current (IZ) rating; instead, its safe operating limit is governed by total power dissipation. At 25 °C ambient, Ptot = 400 mW implies a maximum continuous IZ ≈ 33.3 mA (400 mW ÷ 12 V), assuming full Zener voltage drop and no additional thermal overhead. Derating applies above 25 °C per the published curve.
How is the cathode identified on the PDZ12BZ package?
The cathode of PDZ12BZ is marked by a visible bar on the top surface of the SOD323 package, aligned with Pin 1. This matches the standardized pinning diagram in the datasheet and corresponds to the "K" terminal in electrical schematics - critical for correct orientation during placement and functional circuit operation.
Can PDZ12BZ be used in parallel for higher current handling?
No - PDZ12BZ is not designed for parallel operation due to manufacturing variations in Zener voltage (11.74–12.24 V) and dynamic impedance. Uneven current sharing would occur, risking thermal runaway in the lower-VZ unit. For higher current needs, select a single higher-power Zener or implement active regulation.
Does PDZ12BZ meet automotive qualification standards?
No - PDZ12BZ is not AEC-Q200 qualified. The datasheet explicitly states it is a non-automotive qualified product, with no testing performed to automotive reliability or temperature requirements. Use in automotive applications requires customer validation and assumes full liability for performance and safety compliance.
PDZ12BZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ12BZ FAQ
1.How can I place an order for PDZ12BZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ12BZ 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 PDZ12BZ reliable?
The price and inventory of PDZ12BZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ12BZ is usually 5 days.
3.What payment methods are accepted for PDZ12BZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ12BZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ12BZ?
PDZ12BZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ12BZ 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 PDZ12BZ?
For technical support, including PDZ12BZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ12BZ requirements.
6.How does Aetrix verify that PDZ12BZ is sourced from the original manufacturer or authorized distributors?
All PDZ12BZ 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 PDZ12BZ meets industry standards.
7.What is the process for return or replacement of PDZ12BZ?
All PDZ12BZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ12BZ, 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 PDZ12BZ part is unused and in its original packaging.
Return procedure for PDZ12BZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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