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Nexperia USA Inc. PDZ27B-QZ
- Part No.:
- PDZ27B-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ27B-QZ.pdf
- Description:
- DIODE ZENER 27V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,497
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Product details
Overview
PDZ27B-QZ from Nexperia is a single Zener diode in SOD323 (SC-76) package, rated for 26.19 V to 27.53 V nominal Zener voltage at IZ = 5 mA, with ±2 % tolerance, 400 mW total power dissipation, and qualified per AEC-Q101 for automotive voltage regulation circuits.
For engineers reviewing the PDZ27B-QZ datasheet, PDZ27B-QZ pinout, PDZ27B-QZ application, or PDZ27B-QZ equivalent, this device serves as a precision low-power voltage reference in ECU power rails, sensor biasing networks, and overvoltage clamping stages where stable 27 V regulation and low leakage (<0.05 µA at VR = 21 V) are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a hard knee and low dynamic impedance of 150 Ω at IZ = 0.5 mA and 40 Ω at IZ = 5 mA. Its temperature coefficient is +23.4 mV/K at IZ = 5 mA, enabling predictable drift compensation in mid-range voltage references.
Designed for surface-mount use on FR4 PCBs with standard footprint, it delivers 1.0 A non-repetitive peak reverse current capability (tp = 100 µs), and exhibits 73 pF capacitance at 1 MHz and 0 V bias - suitable for DC and low-frequency stabilization, not RF applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 26.19 V to 27.53 V at IZ = 5 mA - defines regulated output level in shunt regulator topology |
| Dynamic Resistance rdif | 150 Ω @ IZ = 0.5 mA; 40 Ω @ IZ = 5 mA - determines load regulation error under varying current |
| Reverse Leakage IR | <0.05 µA @ VR = 21 V - ensures minimal quiescent current in standby bias networks |
| Power Dissipation Ptot | 400 mW @ Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous power handling before thermal derating |
| Thermal Resistance Rth(j-sp) | 130 K/W junction-to-solder point - enables accurate thermal modeling for PCB copper area design |
| Capacitance Cd | 73 pF @ f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in analog reference paths |
| Temperature Coefficient SZ | +23.4 mV/K @ IZ = 5 mA - quantifies voltage drift per degree Celsius for stability analysis |
Pinout & Package
PDZ27B-QZ is housed in a SOD323 (SC-76) plastic surface-mounted package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode indicated by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal accepting Zener current |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Hard breakdown knee | Sharp, low-noise transition into conduction improves regulation accuracy at low currents |
| Low leakage current | <0.05 µA at 21 V reverse bias minimizes standby power loss in battery-sensitive systems |
| Small SOD323 footprint | 1.8 mm × 1.35 mm body enables high-density placement in compact ECUs and ADAS modules |
| ±2 % VZ tolerance | Tighter than standard Zeners, reducing need for post-production trimming in precision references |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protects 27 V supply rail in engine control modules against transient overvoltage events up to 30 V. IC Role / Device Role / Timing Role: Shunt clamping element placed between rail and ground, conducting excess current above VZ. Use Value: Limits rail excursion to ≤27.53 V with <0.05 µA leakage, preserving MCU and CAN transceiver integrity during load dump. |
Use Scenario: Provides stable 27 V bias for piezoresistive pressure sensors in hydraulic control units. IC Role / Device Role / Timing Role: Precision Zener reference in constant-current source circuitry feeding sensor bridges. Use Value: Enables ±0.5 % full-scale accuracy via 40 Ω dynamic resistance and +23.4 mV/K tempco compensation. |
| Telecom Line Interface Overvoltage Protection | Medical Infusion Pump Voltage Monitoring |
Use Scenario: Guards RS-485 transceiver inputs against induced surges on long industrial bus lines. IC Role / Device Role / Timing Role: Front-end clamp limiting input voltage to 27.53 V before TVS and signal conditioning stage. Use Value: Responds within nanoseconds with 1.0 A surge rating (100 µs), preventing latch-up without adding series impedance. |
Use Scenario: Monitors 24 V DC main supply in Class II medical devices to trigger shutdown if voltage exceeds safe threshold. IC Role / Device Role / Timing Role: Zener-based comparator reference in isolated voltage supervision circuit. Use Value: Delivers 26.19–27.53 V window with ±2 % tolerance and <0.05 µA leakage, meeting IEC 60601-1 leakage current limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | VZ = 25.7–28.3 V (±5 %); 300 mW Ptot; higher leakage (≤1.0 µA @ 21 V) | General-purpose industrial use only; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and tighter tolerance |
| MMSZ5260B-TP | VZ = 26.0–28.0 V (±5 %); 500 mW Ptot; SOD-123 package (larger footprint) | Higher power handling but lacks AEC-Q101 and has looser tolerance | Choose for non-automotive designs needing >400 mW margin and board space availability |
Compared with BZX84-C27LT1G and MMSZ5260B-TP, PDZ27B-QZ offers tighter ±2 % VZ tolerance, AEC-Q101 compliance, and lower leakage - making it the sole choice for automotive voltage monitoring where regulatory validation and precision are mandatory.
Availability
PDZ27B-QZ is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, telecom line clamping, and medical voltage supervision requiring stable component supply across extended temperature ranges and lifecycle continuity.
Supply support for PDZ27B-QZ 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
PDZ27B-QZ belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for automotive voltage regulation, sensor biasing, and power rail protection where precision, low leakage, and long-term reliability are critical.
FAQ
What is the maximum continuous reverse voltage PDZ27B-QZ can regulate without exceeding its power limit?
At ambient temperature ≤25 °C on an FR4 PCB, PDZ27B-QZ sustains up to 27.53 V at IZ = 14.5 mA (400 mW ÷ 27.53 V), assuming no thermal derating. Above 25 °C, power must be reduced per the derating curve in Figure 1 - e.g., at 85 °C, max power drops to ~240 mW, limiting usable current to ~8.7 mA.
How does the +23.4 mV/K temperature coefficient affect circuit performance in a 40 °C to 125 °C automotive environment?
Over that 85 K range, VZ shifts by +1.99 V (23.4 mV/K × 85 K), resulting in a final regulation band of 28.18 V to 29.52 V. This drift must be accommodated in system-level tolerancing - for example, by setting overvoltage detection thresholds ≥30 V in ECU supervisors.
Can PDZ27B-QZ replace a generic 27 V Zener in an existing AEC-Q200-compliant design?
No - PDZ27B-QZ is qualified to AEC-Q101 (discrete semiconductors), not AEC-Q200 (passive components). While its qualification covers stress tests relevant to automotive use, formal AEC-Q200 compliance requires separate passive-component-specific testing not performed on this device.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D.2 profiles: peak temperature ≤260 °C, time above 217 °C ≤60 seconds, and ramp rate ≤3 °C/s. The recommended reflow footprint (Figure 9) uses 0.6 mm × 0.5 mm solder lands with 0.5 mm spacing.
PDZ27B-QZ 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-QZ FAQ
1.How can I place an order for PDZ27B-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ27B-QZ 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-QZ reliable?
The price and inventory of PDZ27B-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ27B-QZ is usually 5 days.
3.What payment methods are accepted for PDZ27B-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ27B-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ27B-QZ?
PDZ27B-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ27B-QZ 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-QZ?
For technical support, including PDZ27B-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ27B-QZ requirements.
6.How does Aetrix verify that PDZ27B-QZ is sourced from the original manufacturer or authorized distributors?
All PDZ27B-QZ 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-QZ meets industry standards.
7.What is the process for return or replacement of PDZ27B-QZ?
All PDZ27B-QZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ27B-QZ, 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-QZ part is unused and in its original packaging.
Return procedure for PDZ27B-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ27B-QZ Tags
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