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Nexperia USA Inc. PDZ9.1BZ
- Part No.:
- PDZ9.1BZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ9.1BZ.pdf
- Description:
- DIODE ZENER 9.1V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:29,990
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Product details
Overview
PDZ9.1BZ from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in surface-mounted applications, with a nominal Zener voltage of 9.1 V at 5 mA, ±2 % tolerance, 60 Ω maximum differential resistance at 5 mA, 0.5 μA maximum reverse current at 7.3 V, and 400 mW total power dissipation on FR4 PCB. It operates as a precision shunt reference in power supply feedback paths and overvoltage clamping circuits.
For engineers reviewing the PDZ9.1BZ datasheet, PDZ9.1BZ pinout, PDZ9.1BZ application, or PDZ9.1BZ equivalent, this device is selected for stable low-current voltage reference, compact board space constraints, tight Zener voltage tolerance, low dynamic impedance, and compatibility with standard reflow soldering processes using SOD323 footprint.
Technical Context
This Zener diode functions as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its cathode–anode terminals under controlled current conditions. Its hard breakdown knee and low leakage (≤0.5 μA at VR = 7.3 V) support accurate voltage referencing in low-power analog and digital supply monitoring circuits.
The device exhibits a positive temperature coefficient of +5.5 mV/K at IZ = 5 mA, enabling predictable thermal drift behavior in ambient-temperature-varying environments. Thermal resistance from junction to solder point is 130 K/W, confirming suitability for thermally constrained PCB layouts with minimal copper area.
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 threshold for 9.1 V nominal regulation |
| Differential Resistance rdif | ≤60 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Reverse Current IR | ≤0.5 μA at VR = 7.3 V - guarantees low standby power loss and high impedance in non-conducting state |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports reliable anode-to-cathode conduction during forward bias testing or protection modes |
| Total Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous thermal load without derating |
| Temperature Coefficient SZ | +5.5 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for stability analysis in thermal design |
| Junction-to-Ambient Rth(j-a) | 340 K/W - determines steady-state temperature rise above ambient under full power operation |
Pinout & Package
PDZ9.1BZ is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.8 mm × 1.35 mm × 0.95 mm, with gull-wing leads and a cathode-marking bar on the top surface.
| 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 current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 60 Ω max at 5 mA - enables tight voltage regulation under varying load currents |
| Hard breakdown knee | Sharp, well-defined Zener transition - improves accuracy in precision reference applications |
| Low leakage current | 0.5 μA max at 7.3 V - minimizes quiescent power draw in battery-powered or standby circuits |
| SOD323 footprint compatibility | Standardized 0.6 mm pad pitch, 0.5 mm solder land width - ensures manufacturability with automated SMT lines |
| Thermal performance | Rth(j-sp) = 130 K/W - allows direct thermal coupling to PCB copper for passive heat dissipation |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Used in the feedback divider of a DC-DC buck converter to set output voltage via optocoupler-coupled secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 9.1 V reference point for error amplifier input. Use Value: Enables ±1 % output voltage accuracy over line/load/temperature due to tight 2 % VZ tolerance and low rdif. |
Use Scenario: Placed between a 3.3 V GPIO pin and ground to protect against transient overvoltage events exceeding 9.1 V. IC Role / Device Role / Timing Role: Passive clamping element diverting surge current away from sensitive CMOS input structures. Use Value: Limits pin voltage to ≤9.1 V while sustaining <0.5 μA leakage at normal operating voltage, preserving signal integrity. |
| Low-Power Sensor Biasing | Reference Voltage for ADC Input Scaling |
Use Scenario: Supplies stable bias voltage to a thermistor-based temperature sensing circuit in a wearable health monitor. IC Role / Device Role / Timing Role: Low-current Zener source delivering consistent 9.1 V to excite resistive sensor network. Use Value: Delivers <100 ppm/°C effective stability (via +5.5 mV/K coefficient and low rdif), reducing temperature-induced measurement offset. |
Use Scenario: Provides fixed 9.1 V reference to scale analog sensor outputs before digitization by a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision voltage reference defining full-scale input range for ratiometric conversion. Use Value: Achieves <0.5 LSB INL error contribution due to 2 % VZ tolerance and <60 Ω output impedance matching ADC input requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C9V1 | Same 9.1 V nominal VZ, but ±5 % tolerance and higher rdif (100 Ω); SOD523 package (smaller, 1.2 × 0.8 mm) | Less precise regulation; unsuitable where <1 % output accuracy is required | Select when board space is critical and ±5 % voltage tolerance is acceptable |
| MMSZ4686T1G | 9.1 V nominal VZ, ±5 % tolerance, 150 Ω rdif, 500 mW Ptot, SOD-123 package | Higher power handling but looser regulation and larger footprint than SOD323 | Select when higher surge current capability (>3.5 A IZSM) or legacy footprint compatibility is needed |
Compared with BZX584-C9V1 and MMSZ4686T1G, PDZ9.1BZ offers superior voltage accuracy (±2 % vs. ±5 %), lower dynamic impedance (60 Ω vs. ≥100 Ω), and smallest standardized footprint (SOD323), making it optimal for space-constrained, precision-regulated designs requiring minimal thermal overhead.
Availability
PDZ9.1BZ is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp for microcontroller I/O, and low-power sensor biasing requiring stable component supply, consistent parametric performance, and SMD manufacturing compatibility.
Supply support for PDZ9.1BZ 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 leading global semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.
PDZ9.1BZ belongs to the PDZ-B series of low-power Zener diodes engineered for general-purpose voltage regulation in compact, cost-sensitive consumer and industrial electronics where precision, small size, and SMT manufacturability are essential.
FAQ
What is the maximum reverse current specification for PDZ9.1BZ at 7.3 V?
The maximum reverse current (IR) for PDZ9.1BZ is 0.5 μA when tested at VR = 7.3 V and Tj = 25 °C. This value reflects the device's low-leakage performance in sub-breakdown conditions, critical for minimizing standby power in battery-operated systems and ensuring clean reference node behavior.
Can PDZ9.1BZ be used in place of a 9.1 V Zener with ±5 % tolerance?
Yes, PDZ9.1BZ can replace ±5 % tolerance Zeners where tighter regulation is beneficial, but only if the circuit accommodates its lower dynamic impedance (60 Ω vs. typical 100–150 Ω) and reduced power rating (400 mW vs. often 500 mW). Its improved accuracy may eliminate need for post-production calibration in feedback loops.
What is the thermal resistance from junction to solder point (Rth(j-sp)) for PDZ9.1BZ?
The thermal resistance from junction to solder point is 130 K/W under free-air conditions on an FR4 PCB with standard SOD323 footprint. This value enables accurate junction temperature estimation during layout thermal analysis and confirms suitability for use without additional heatsinking in ≤200 mW average power applications.
How does the +5.5 mV/K temperature coefficient affect regulation stability?
The +5.5 mV/K temperature coefficient means VZ increases by 5.5 mV per degree Celsius rise in junction temperature at IZ = 5 mA. For a 50 °C ambient-to-junction rise, this yields ~275 mV drift - a known, linear offset that can be compensated in system-level calibration or accepted where ±3 % overall regulation is sufficient.
PDZ9.1BZ 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
PDZ9.1BZ FAQ
1.How can I place an order for PDZ9.1BZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ9.1BZ 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 PDZ9.1BZ reliable?
The price and inventory of PDZ9.1BZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ9.1BZ is usually 5 days.
3.What payment methods are accepted for PDZ9.1BZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ9.1BZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ9.1BZ?
PDZ9.1BZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ9.1BZ 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 PDZ9.1BZ?
For technical support, including PDZ9.1BZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ9.1BZ requirements.
6.How does Aetrix verify that PDZ9.1BZ is sourced from the original manufacturer or authorized distributors?
All PDZ9.1BZ 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 PDZ9.1BZ meets industry standards.
7.What is the process for return or replacement of PDZ9.1BZ?
All PDZ9.1BZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ9.1BZ, 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 PDZ9.1BZ part is unused and in its original packaging.
Return procedure for PDZ9.1BZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ9.1BZ Tags
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