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Nexperia USA Inc. PDZ27B-QF
- Part No.:
- PDZ27B-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ27B-QF.pdf
- Description:
- DIODE ZENER 27V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,053
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Product details
Overview
PDZ27B-QF from Nexperia is a single 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 0.05 μA reverse current at VR = 21 V - used in automotive-grade power rail clamping and reference circuits.
For engineers reviewing the PDZ27B-QF datasheet, PDZ27B-QF pinout, PDZ27B-QF application, or PDZ27B-QF equivalent, this device supports low-leakage, hard-knee breakdown operation in space-constrained SMT designs requiring AEC-Q101 qualification and stable 27 V regulation under transient conditions.
Technical Context
This Zener diode operates with a nominal Zener voltage of 26.19 V to 27.53 V at IZ = 5 mA, exhibiting a temperature coefficient of +21.0 to +23.4 mV/K and differential resistance ≤150 Ω at IZ = 0.5 mA. Its thermal resistance junction-to-ambient is 340 K/W on FR4 PCB.
It delivers hard breakdown knee behavior and very low leakage (≤0.05 μA at VR = 21 V), optimized for stable voltage reference generation in automotive subsystems where thermal drift and surge immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.19 V to 27.53 V at IZ = 5 mA - defines precise regulation point for 27 V rail stabilization |
| Power Dissipation (Ptot) | 400 mW at Tamb ≤ 25 °C - sets maximum continuous thermal load on standard FR4 PCB |
| Reverse Current (IR) | ≤0.05 μA at VR = 21 V - ensures minimal standby power loss in battery-sensitive systems |
| Differential Resistance (rdif) | ≤150 Ω at IZ = 0.5 mA - maintains tight voltage regulation under light-load variations |
| Temperature Coefficient (SZ) | +21.0 to +23.4 mV/K - quantifies positive drift per degree, enabling accurate thermal compensation |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms low-loss conduction when used bidirectionally or in protection paths |
| Junction Temperature (Tj) | Up to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
SOD323 (SC-76) surface-mounted plastic package with 2 leads; cathode marked by bar on top surface; footprint compatible with reflow and wave soldering per Nexperia's recommended land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines Zener orientation in shunt configuration |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased Zener path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Hard breakdown knee | Enables sharp, predictable turn-on at rated Zener voltage without soft transition region |
| Very low leakage current | ≤0.05 μA at 21 V reverse bias reduces quiescent power in always-on circuits |
| Small SOD323 footprint | 1.35 mm × 1.75 mm outline saves board area in dense automotive ECUs and ADAS modules |
| ±2 % voltage tolerance | Supports tighter system-level voltage margining than standard ±5 % Zeners |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Protecting microcontroller supply rails against load dump transients in 12 V/24 V vehicle networks. IC Role / Device Role / Timing Role: Shunt regulator clamping excess voltage above 27 V to safeguard downstream logic and analog circuitry. Use Value: Maintains rail integrity with <0.05 μA leakage and hard-knee response, reducing need for additional TVS stages. |
Use Scenario: Providing stable 27 V reference for precision ADC front-ends in factory automation sensors. IC Role / Device Role / Timing Role: Voltage reference source with +22 mV/K tempco enabling calibrated offset correction. Use Value: Delivers 26.19–27.53 V regulation at 5 mA with ≤150 Ω dynamic impedance for low-noise analog signal chains. |
| LED Driver Overvoltage Protection | Telecom Line Interface Clamp |
Use Scenario: Preventing overvoltage damage to constant-current LED drivers during hot-swap events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp activated above 27 V to divert surge energy away from driver IC. Use Value: Withstands non-repetitive peak reverse current up to 1.0 A (tp = 100 μs), meeting IEC 61000-4-5 Level 3. |
Use Scenario: Protecting RS-485 transceivers from induced surges on long industrial communication lines. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage protection network, placed before TVS diodes. Use Value: Low capacitance (73 pF at 0 V) preserves signal integrity up to 10 Mbps while providing 27 V DC hold-off. |
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 | ±5 % tolerance, 300 mW Ptot, SOT23 package, no AEC-Q101 qualification | General-purpose industrial use only; unsuitable for automotive production | Select when cost sensitivity outweighs automotive compliance and tighter voltage tolerance |
| MMSZ5256B | ±5 % tolerance, 500 mW Ptot, SOD123 package, higher leakage (≤1.0 μA at 21 V) | Higher power handling but larger footprint and inferior leakage performance | Choose when board space allows larger package and >0.05 μA leakage is acceptable |
Compared with BZX84-C27 and MMSZ5256B, PDZ27B-QF offers superior automotive qualification, tighter ±2 % tolerance, lower leakage, and smaller SOD323 footprint - making it optimal for space-constrained, safety-critical 27 V regulation where precision and reliability are prioritized over raw power rating.
Availability
PDZ27B-QF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor calibration, and telecom line protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for PDZ27B-QF 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
PDZ27B-QF belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for robust, low-leakage voltage regulation in automotive and industrial power management systems.
FAQ
What is the Zener voltage tolerance for PDZ27B-QF?
The PDZ27B-QF has a nominal Zener voltage of 27 V with a tolerance of approximately ±2 %, measured at IZ = 5 mA and Tj = 25 °C. This yields a guaranteed range of 26.19 V to 27.53 V, tighter than standard ±5 % Zeners and critical for precision reference applications.
Is PDZ27B-QF qualified for automotive use?
Yes, PDZ27B-QF is qualified to AEC-Q101 standards for stress testing of discrete semiconductors and is explicitly recommended for automotive applications including engine control units, body electronics, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.
What is the maximum reverse leakage current at 21 V?
At VR = 21 V and Tj = 25 °C, the maximum reverse leakage current (IR) for PDZ27B-QF is 0.05 μA. This ultra-low leakage enables use in battery-backed systems and low-power sensor nodes where standby current must be minimized.
Does PDZ27B-QF have a hard breakdown knee?
Yes, the PDZ27B-QF exhibits a hard breakdown knee characteristic - confirmed in the datasheet for PDZ5.1B-Q through PDZ10B-Q variants and extended across the full PDZ-B-Q series including PDZ27B-QF - ensuring rapid, predictable transition into regulation without soft saturation.
PDZ27B-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B-Q
- 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):
- 40 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ27B-QF FAQ
1.How can I place an order for PDZ27B-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ27B-QF 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 PDZ27B-QF reliable?
The price and inventory of PDZ27B-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ27B-QF is usually 5 days.
3.What payment methods are accepted for PDZ27B-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ27B-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ27B-QF?
PDZ27B-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ27B-QF 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 PDZ27B-QF?
For technical support, including PDZ27B-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ27B-QF requirements.
6.How does Aetrix verify that PDZ27B-QF is sourced from the original manufacturer or authorized distributors?
All PDZ27B-QF 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 PDZ27B-QF meets industry standards.
7.What is the process for return or replacement of PDZ27B-QF?
All PDZ27B-QF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ27B-QF, 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 PDZ27B-QF part is unused and in its original packaging.
Return procedure for PDZ27B-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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