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Nexperia USA Inc. PDZ9.1BF
- Part No.:
- PDZ9.1BF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ9.1BF.pdf
- Description:
- DIODE ZENER 9.1V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,854
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Product details
Overview
PDZ9.1BF from Nexperia is a single silicon Zener diode designed for low-power voltage regulation and reference applications in compact SMD designs. It provides a nominal 9.1 V Zener voltage at 5 mA, with ±2 % tolerance, 60 Ω maximum differential resistance at 5 mA, 0.5 μA maximum reverse leakage at 7.3 V, and operates within a −65 °C to +150 °C junction temperature range.
For engineers reviewing the PDZ9.1BF datasheet, PDZ9.1BF pinout, PDZ9.1BF application, or PDZ9.1BF equivalent, this device is selected for precision low-current biasing, overvoltage clamping in signal conditioning circuits, and stable voltage references in space-constrained consumer and industrial power management subsystems.
Technical Context
The PDZ9.1BF functions as a two-terminal shunt regulator, maintaining a stable reverse breakdown voltage across its cathode–anode terminals when biased above its Zener threshold. Its hard breakdown knee and low dynamic impedance (≤60 Ω at IZ = 5 mA) ensure predictable regulation under light-load conditions.
Thermal performance is defined by Rth(j-sp) = 130 K/W (junction-to-solder point) and Rth(j-a) = 340 K/W (junction-to-ambient), measured on FR4 PCB with standard SOD323 footprint - enabling accurate derating up to 400 mW at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.85 V to 9.23 V at IZ = 5 mA - defines precise clamping level for 9.1 V nominal reference |
| Differential Resistance rdif | ≤60 Ω at IZ = 5 mA - ensures minimal voltage shift under small current variations |
| Reverse Leakage IR | ≤0.5 μA at VR = 7.3 V - enables low-power standby operation without significant quiescent loss |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports reliable anode-cathode conduction during forward-biased protection events |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - sets thermal design boundary for PCB layout and copper area planning |
| Temperature Coefficient SZ | +5.5 mV/K at IZ = 5 mA - quantifies positive drift of VZ with rising junction temperature |
| Junction Temperature Tj | −65 °C to +150 °C - confirms suitability for extended industrial ambient environments |
Pinout & Package
PDZ9.1BF is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with a cathode-marking bar on the top surface. The package supports reflow and wave soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (marked side) | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | ≤60 Ω at 5 mA - improves regulation accuracy in low-current feedback loops |
| Hard breakdown knee | Sharp transition from blocking to conduction - reduces ambiguity in clamping threshold detection |
| Small SMD footprint | SOD323 package (1.8 × 1.35 mm) - enables high-density routing in portable and IoT PCB layouts |
| Tight voltage tolerance | ±2 % at IZ = 5 mA - eliminates need for post-assembly trimming in cost-sensitive voltage reference designs |
| Low leakage current | ≤0.5 μA at 80 % of VZ - minimizes standby power draw in battery-backed systems |
Applications
| Power Supply Rail Clamping | Signal-Level Voltage Reference |
|---|---|
|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage during hot-plug or ESD events. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to ≤9.1 V while diverting surge current to ground. Use Value: Prevents latch-up or oxide damage using only 0.5 μA leakage and 60 Ω impedance to maintain tight clamping window. |
Use Scenario: Providing stable bias voltage for op-amp comparators in analog sensor interfaces. IC Role / Device Role / Timing Role: Two-terminal passive reference source delivering 9.1 V with <±2 % initial accuracy. Use Value: Enables 12-bit ADC reference stability without active regulation, leveraging +5.5 mV/K tempco for known drift compensation. |
| Low-Power Voltage Monitor | LED Current Regulation |
|
Use Scenario: Detecting brown-out conditions in 12 V automotive accessory modules. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding comparator input via resistive divider. Use Value: Operates reliably at 100 nA standby current and maintains 8.85–9.23 V window across −40 °C to +125 °C. |
Use Scenario: Setting constant current for indicator LEDs in industrial HMI panels. IC Role / Device Role / Timing Role: Series-shunt regulator establishing fixed voltage drop across current-setting resistor. Use Value: Delivers consistent LED brightness with ≤0.9 V forward drop and 400 mW thermal margin on standard FR4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C9V1 | Through-hole DO-35 package; ±5 % tolerance; 100 Ω rdif at 5 mA | Requires through-hole assembly; less precise regulation and higher impedance limit use in low-current references | Select when legacy through-hole compatibility or higher surge robustness (1.3 W Ptot) is prioritized over size and accuracy |
| MMSZ5240B | SOD-123 package; ±5 % tolerance; 17 Ω rdif at 20 mA but rated only at 500 mW peak | Lower impedance at higher current, but tighter thermal limits and no guaranteed 5 mA low-current performance | Select when operating near 20 mA and board space allows larger SOD-123; avoid for sub-1 mA reference use |
Compared with BZX55-C9V1 and MMSZ5240B, PDZ9.1BF offers superior low-current regulation fidelity (±2 %, 60 Ω @ 5 mA) in the smallest footprint (SOD323), making it optimal for modern high-density, low-power voltage reference and clamping where precision at microampere bias matters.
Availability
PDZ9.1BF is available at Aetrix Electronics and suitable for voltage reference design, ESD protection circuits, and low-power rail clamping requiring stable component supply across consumer electronics, industrial control modules, and IoT edge devices.
Supply support for PDZ9.1BF 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 discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
PDZ9.1BF belongs to the PDZ-B series of low-power Zener diodes engineered for precision voltage regulation in space-constrained SMD applications - emphasizing tight tolerance, low leakage, and repeatable breakdown characteristics.
FAQ
What is the maximum reverse voltage PDZ9.1BF can withstand before breakdown?
The PDZ9.1BF exhibits a specified Zener voltage range of 8.85 V to 9.23 V at 5 mA test current, with a hard breakdown knee ensuring stable conduction onset. Its absolute maximum non-repetitive peak reverse voltage is not rated separately - operation must remain within the 9.1 V nominal regulation band under continuous DC or pulsed conditions defined in the datasheet's limiting values table.
Can PDZ9.1BF be used in series or parallel configurations for higher voltage or current handling?
PDZ9.1BF is not recommended for parallel connection due to mismatched Zener voltages causing current hogging and thermal runaway. In series, total voltage equals sum of individual VZ values, but thermal coupling and tolerance stacking reduce accuracy - use only with matched units and derated power per device, as confirmed in Nexperia's application note AN10273.
How does temperature affect the Zener voltage of PDZ9.1BF?
PDZ9.1BF has a positive temperature coefficient of +5.5 mV/K at IZ = 5 mA, meaning its Zener voltage increases linearly with junction temperature. At 100 °C rise above 25 °C, VZ increases by ~550 mV - a factor critical for precision reference designs requiring drift compensation or thermal shielding.
Is PDZ9.1BF suitable for automotive applications?
No - PDZ9.1BF is not AEC-Q200 qualified and lacks automotive-grade screening, qualification testing, or guaranteed operation across −40 °C to +150 °C full-range junction temperatures. Nexperia explicitly states non-automotive qualification in the legal disclaimers; use only in commercial or industrial environments unless independently validated per customer requirements.
PDZ9.1BF 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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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
PDZ9.1BF FAQ
1.How can I place an order for PDZ9.1BF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ9.1BF 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 PDZ9.1BF reliable?
The price and inventory of PDZ9.1BF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ9.1BF is usually 5 days.
3.What payment methods are accepted for PDZ9.1BF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ9.1BF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ9.1BF?
PDZ9.1BF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ9.1BF 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 PDZ9.1BF?
For technical support, including PDZ9.1BF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ9.1BF requirements.
6.How does Aetrix verify that PDZ9.1BF is sourced from the original manufacturer or authorized distributors?
All PDZ9.1BF 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 PDZ9.1BF meets industry standards.
7.What is the process for return or replacement of PDZ9.1BF?
All PDZ9.1BF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ9.1BF, 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 PDZ9.1BF part is unused and in its original packaging.
Return procedure for PDZ9.1BF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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