My Inquiry
My Account
Nexperia USA Inc. PDZ30B-QX
- Part No.:
- PDZ30B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ30B-QX.pdf
- Description:
- DIODE ZENER 30V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,590
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PDZ30B-QX from Nexperia is a single silicon Zener diode designed for precision voltage regulation in low-power circuits, with a nominal Zener voltage of 30 V at 5 mA, ±2 % tolerance, 400 mW total power dissipation, and SOD323 (SC-76) surface-mount package - used in automotive ECU power rail clamping and sensor reference stabilization.
For engineers reviewing the PDZ30B-QX datasheet, PDZ30B-QX pinout, PDZ30B-QX application, or PDZ30B-QX equivalent, this page delivers verified Zener parameters including VZ = 29.19–30.69 V, rdif ≤ 200 Ω at IZ = 0.5 mA, IR ≤ 0.05 μA at VR = 23 V, temperature coefficient SZ = +26.6 mV/K, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its hard breakdown knee and low leakage current (<0.05 μA at 23 V) enable accurate clamping in low-current bias networks and precision analog front-ends.
The device features a junction-to-solder-point thermal resistance of 130 K/W and junction-to-ambient resistance of 340 K/W on FR4 PCB, supporting reliable operation up to Tj = +150 °C. It is rated for non-repetitive peak reverse current of 1.0 A (tp = 100 μs), suitable for transient overvoltage suppression in 12 V/24 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 29.19 V to 30.69 V at IZ = 5 mA - defines clamping threshold with tight ±2 % tolerance for stable reference generation |
| Differential Resistance rdif | ≤ 200 Ω at IZ = 0.5 mA - ensures minimal voltage shift under small current variations in feedback loops |
| Reverse Leakage IR | ≤ 0.05 μA at VR = 23 V - enables ultra-low power standby operation without reference drift |
| Temperature Coefficient SZ | +26.6 mV/K at IZ = 5 mA - quantifies positive VZ drift per degree, critical for high-temp automotive environments |
| Total Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage VF | 0.9 V at IF = 10 mA - defines anode-cathode conduction drop during forward-biased fault conditions |
| Package | SOD323 (SC-76) - 1.35 mm × 0.8 mm footprint with cathode-marked bar, optimized for high-density automotive PCB layouts |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with two terminals: compact 1.35 mm × 0.8 mm outline, 0.4 mm lead pitch, cathode identified by marking bar.
| 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 reverse-bias path for voltage reference operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Hard breakdown knee | Sharp, well-defined reverse conduction onset improves regulation accuracy in low-current bias networks |
| Very low leakage current | ≤0.05 μA at 23 V enables use in battery-backed circuits and ultra-low-power sensor references |
| Wide voltage range coverage | Part of 29-type series spanning 2.4 V to 36 V - supports standardized BOM consolidation across vehicle platforms |
| Small SMD footprint | SOD323 package allows placement near IC power pins for localized rail clamping without board area penalty |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Reference Stabilization |
|---|---|
|
Use Scenario: Protecting microcontroller supply rails in engine control units against load dump transients and alternator ripple. IC Role / Device Role / Timing Role: Zener clamping element placed between 5 V/3.3 V rail and ground to limit overvoltage excursions. Use Value: With VZ = 30 V and IZSM = 1.0 A (100 μs), it absorbs surge energy while maintaining <0.05 μA leakage to avoid loading sensitive LDO outputs. |
Use Scenario: Providing stable reference voltage for analog-to-digital conversion in pressure and temperature sensors. IC Role / Device Role / Timing Role: Shunt reference connected in parallel with sensor signal conditioning circuitry to fix bias point. Use Value: ±2 % VZ tolerance and +26.6 mV/K SZ allow predictable compensation in closed-loop calibration algorithms across −40 °C to +125 °C. |
| USB-C Port Overvoltage Protection | Low-Power IoT Node Voltage Monitoring |
|
Use Scenario: Safeguarding USB-C power delivery interface ICs from accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Reverse-biased Zener tied between VBUS and GND to clamp at 30 V before damage threshold of downstream PMIC. Use Value: 400 mW Ptot and 130 K/W Rth(j-sp) ensure thermal survival during brief 20 V overvoltage events without derating. |
Use Scenario: Monitoring battery voltage in BLE-enabled asset trackers using resistive divider + ADC. IC Role / Device Role / Timing Role: Low-leakage shunt reference establishing known upper rail for divider ratio calibration. Use Value: 0.05 μA IR prevents measurable error in 1 MΩ/1 MΩ divider networks, preserving >10-year coin-cell lifetime. |
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-C30 | VZ = 28.5–31.5 V (±5 %), Ptot = 300 mW, SOD323, no AEC-Q101 qualification | Limited to commercial-grade portable electronics; lacks automotive reliability validation | Select when cost sensitivity outweighs AEC-Q101 requirement and ±5 % VZ tolerance is acceptable |
| MMSZ5257ET1G | VZ = 28.5–31.5 V (±5 %), Ptot = 500 mW, SOD123, higher thermal resistance (Rth(j-a) ≈ 400 K/W) | Better power handling but larger footprint and inferior thermal performance on FR4 | Choose only if board layout permits SOD123 and system-level thermal margin exceeds 400 mW derating needs |
Compared with BZX84-C30 and MMSZ5257ET1G, PDZ30B-QX offers tighter ±2 % VZ tolerance, AEC-Q101 qualification, and optimized thermal resistance (130 K/W j-to-sp) - making it the preferred choice for automotive and high-reliability industrial voltage reference designs where precision and qualification matter.
Availability
PDZ30B-QX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor reference circuits, USB-C overvoltage safeguards, and low-power IoT voltage monitoring requiring stable component supply and long-term lifecycle assurance.
Supply support for PDZ30B-QX 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 Dutch semiconductor manufacturer specializing in high-volume logic, discrete, and MOSFET solutions, with core expertise in automotive-qualified components and efficient power management devices.
PDZ30B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for robust voltage regulation in automotive electronics and industrial control systems demanding high reliability and tight parametric consistency.
FAQ
What is the maximum continuous reverse current the PDZ30B-QX can sustain at 25 °C?
The PDZ30B-QX does not specify a maximum continuous reverse current rating; instead, its operation is defined by Zener test current (IZ = 5 mA) and power dissipation limit. At 25 °C ambient, it sustains up to 400 mW total power, corresponding to ~13.3 mA at 30 V - but sustained operation above 5 mA requires thermal derating per the power derating curve in Figure 1.
How is the cathode identified on the PDZ30B-QX package?
The cathode is marked by a visible bar on the top surface of the SOD323 package, aligned with Pin 1 as shown in Figure 8 of the datasheet. This bar corresponds to the cathode (K) terminal, and Pin 2 is the anode (A); orientation matches standard SOD323 land patterns in Figures 9 and 10.
Does PDZ30B-QX support reflow soldering, and what profile is recommended?
Yes, PDZ30B-QX is qualified for lead-free reflow soldering. Nexperia recommends using the footprint in Figure 9 (sod323_fr) with standard JEDEC J-STD-020 profiles. Peak temperature must not exceed 260 °C, and time above 217 °C should be limited to 60–150 seconds to prevent package degradation or bond wire stress.
Can PDZ30B-QX replace a 30 V Zener in a linear regulator feedback network?
Yes - its ±2 % VZ tolerance, low dynamic impedance (200 Ω at 0.5 mA), and stable temperature coefficient (+26.6 mV/K) make it suitable for feedback node referencing in adjustable linear regulators. However, verify that the regulator's feedback current remains within the Zener's specified IZ range (0.5–5 mA) to maintain regulation accuracy.
PDZ30B-QX 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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23 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
PDZ30B-QX FAQ
1.How can I place an order for PDZ30B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ30B-QX 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 PDZ30B-QX reliable?
The price and inventory of PDZ30B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ30B-QX is usually 5 days.
3.What payment methods are accepted for PDZ30B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ30B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ30B-QX?
PDZ30B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ30B-QX 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 PDZ30B-QX?
For technical support, including PDZ30B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ30B-QX requirements.
6.How does Aetrix verify that PDZ30B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ30B-QX 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 PDZ30B-QX meets industry standards.
7.What is the process for return or replacement of PDZ30B-QX?
All PDZ30B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ30B-QX, 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 PDZ30B-QX part is unused and in its original packaging.
Return procedure for PDZ30B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ30B-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
