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Nexperia USA Inc. PDZ27BF
- Part No.:
- PDZ27BF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ27BF.pdf
- Description:
- DIODE ZENER 27V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,598
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Product details
Overview
PDZ27BF from Nexperia is a single low-power Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation at 27 V nominal working voltage with ±2 % tolerance, 400 mW total power dissipation, and 150 Ω maximum differential resistance at IZ = 5 mA. It delivers stable clamping in low-current bias circuits such as reference supplies and overvoltage protection in portable sensor interfaces.
For engineers reviewing the PDZ27BF datasheet, PDZ27BF pinout, PDZ27BF application, or PDZ27BF equivalent, this device is selected for compact, surface-mounted voltage reference designs requiring tight Zener voltage tolerance, low leakage (<0.05 µA at VR = 21 V), and hard breakdown knee behavior under 5–40 mA operating current.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 27 V at 5 mA test current, exhibiting a temperature coefficient of +23.4 mV/K - indicating positive thermal drift optimized for mid-to-high voltage regulation where compensation is managed externally. Its low dynamic impedance (150 Ω max) ensures minimal voltage shift across load variations within its specified current range.
The device uses planar epitaxial construction for stable parametric performance and features a hard breakdown knee with low leakage current (≤0.05 µA at 21 V), enabling reliable operation in low-power bias networks and precision shunt references without significant thermal runaway risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 26.19 V to 27.53 V at IZ = 5 mA - defines precise clamping threshold for 27 V nominal regulation |
| Differential Resistance rdif | 150 Ω max at IZ = 5 mA - ensures <15 mV output shift per 100 µA current change in reference circuits |
| Reverse Current IR | ≤0.05 µA at VR = 21 V - enables ultra-low standby power in battery-backed voltage monitors |
| Total Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C on FR4 PCB - supports continuous operation in space-constrained consumer PCBs |
| Thermal Resistance Rth(j-a) | 340 K/W - requires derating to ~200 mW at 85 °C ambient for sustained reliability |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - allows use as polarity-sensitive clamp or series diode in dual-function circuits |
Pinout & Package
PDZ27BF is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode marked by a visible bar on the top surface. The package supports reflow and wave soldering per IPC-7095 guidelines and is rated for storage temperatures from −65 °C to +150 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 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 bias path for controlled conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in 27 V reference designs without recalibration or resistor trimming |
| Hard breakdown knee | Provides sharp transition into regulation, minimizing ambiguity in threshold detection for protection circuits |
| Low leakage current (≤0.05 µA) | Reduces quiescent current draw in always-on monitoring circuits, extending battery life |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land pattern, simplifying layout reuse across voltage grades |
| 150 °C junction temperature rating | Supports operation in thermally dense environments like enclosed IoT hubs or automotive body control modules |
Applications
| Industrial Sensor Signal Conditioning | USB-C Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt Zener regulator providing 27 V reference to op-amp bias network and ADC driver stage. Use Value: Maintains <±0.5 % reference stability over −25 °C to +70 °C due to predictable +23.4 mV/K tempco and low rdif. |
Use Scenario: Protecting USB-C CC line transceivers from accidental 24 V industrial supply coupling during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting reverse-biased clamp limiting CC line voltage to 27.5 V before IC damage threshold. Use Value: Responds within nanoseconds with <0.05 µA leakage to avoid false logic states while surviving 1 A surge per IEC 61000-4-5 Level 3. |
| Low-Power RTOS Bootloader Reference | Smart Meter Voltage Supervisor |
|
Use Scenario: Generating clean 27 V startup reference for secure bootloader verification circuitry in edge AI gateways. IC Role / Device Role / Timing Role: Precision shunt element setting threshold for brown-out detector enabling firmware integrity check. Use Value: Delivers repeatable 27.2 V trigger point across 10k-cycle power cycles with no hysteresis-induced false resets. |
Use Scenario: Monitoring auxiliary 24 V DC supply rail in utility-grade smart meters to detect grid anomaly conditions. IC Role / Device Role / Timing Role: Zener-based comparator input reference ensuring accurate undervoltage/overvoltage flag generation. Use Value: Achieves <±1.2 % total error budget including tempco and tolerance, meeting ANSI C12.20 Class 0.5 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27 | Same 27 V nominal, but ±5 % tolerance and 600 Ω rdif at 5 mA | Higher voltage drift under load; suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation precision and board space allows larger SOT-23 footprint |
| MMSZ5258B | 27 V nominal with ±5 % tolerance, 1000 mW Ptot, SOD-123 package | Higher power handling but looser tolerance and larger footprint | Prefer for high-surge environments where 400 mW derating is insufficient, accepting reduced accuracy |
Compared with BZX84-C27 and MMSZ5258B, PDZ27BF offers superior voltage accuracy and lower dynamic impedance in the smallest SOD323 form factor - making it optimal for space-constrained, precision-regulated systems where thermal margin and parametric consistency are prioritized over raw power capacity.
Availability
PDZ27BF is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C port overvoltage clamp, and smart meter voltage supervisor applications requiring stable component supply, consistent parametric binning, and long-term obsolescence management.
Supply support for PDZ27BF 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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices with ISO/TS 16949-certified production.
PDZ27BF belongs to the PDZ-B series of low-power Zener diodes engineered for compact, precision voltage regulation in consumer, industrial, and computing applications where SMD footprint efficiency and parametric consistency are critical.
FAQ
What is the maximum reverse current specification for PDZ27BF at 21 V?
The maximum reverse current (IR) for PDZ27BF is 0.05 µA when tested at VR = 21 V and Tj = 25 °C. This ultra-low leakage enables use in battery-powered systems where standby current must remain below 100 nA, and is verified per Table 8 of the official Nexperia datasheet Rev. 5.
Does PDZ27BF have a specified temperature coefficient, and how does it affect regulation accuracy?
Yes - PDZ27BF has a typical temperature coefficient (SZ) of +23.4 mV/K at IZ = 5 mA, meaning its Zener voltage increases by approximately 23.4 mV per degree Celsius rise in junction temperature. This positive drift must be accounted for in wide-temperature-range designs, especially above 60 °C ambient, where regulation error may exceed ±1.5 % without compensation.
Can PDZ27BF be used in parallel for higher power dissipation?
No - PDZ27BF is not designed for parallel operation due to manufacturing variations in Zener voltage and dynamic impedance. Even small mismatches (e.g., 0.1 V) cause current hogging, leading to thermal runaway and premature failure. For >400 mW requirements, select a single higher-power Zener such as BZT52-B27 in SOD-123 or use an active regulator topology.
Is the SOD323 package of PDZ27BF compatible with standard reflow profiles?
Yes - PDZ27BF's SOD323 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C and time above liquidus ≤ 60 seconds. Recommended solder land dimensions are 0.6 mm × 0.95 mm per pad (Fig. 9), and thermal relief should follow IPC-7351B density level 'N' for optimal wetting and void control.
PDZ27BF 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):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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
PDZ27BF FAQ
1.How can I place an order for PDZ27BF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ27BF 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 PDZ27BF reliable?
The price and inventory of PDZ27BF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ27BF is usually 5 days.
3.What payment methods are accepted for PDZ27BF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ27BF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ27BF?
PDZ27BF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ27BF 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 PDZ27BF?
For technical support, including PDZ27BF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ27BF requirements.
6.How does Aetrix verify that PDZ27BF is sourced from the original manufacturer or authorized distributors?
All PDZ27BF 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 PDZ27BF meets industry standards.
7.What is the process for return or replacement of PDZ27BF?
All PDZ27BF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ27BF, 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 PDZ27BF part is unused and in its original packaging.
Return procedure for PDZ27BF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ27BF Tags
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