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Nexperia USA Inc. PZU84-C51R
- Part No.:
- PZU84-C51R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C51R.pdf
- Description:
- DIODE ZENER 51V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,657
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Product details
Overview
PZU84-C51R from Nexperia is a general-purpose Zener voltage regulator diode in SOT23 package, rated for 51 V nominal breakdown voltage (±5 % tolerance), 250 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers hard breakdown knee, low leakage current, and optimized noise performance for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the PZU84-C51R datasheet, PZU84-C51R pinout, PZU84-C51R application, or PZU84-C51R equivalent, key selection criteria include its 51 V Zener voltage with ±5 % tolerance, 400 Ω typical differential resistance at IZ = 2 mA, −35.7 to +57.2 mV/K temperature coefficient range, and SOT23-3 surface-mount footprint compatible with automated assembly.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across load terminals under varying current conditions. Its design targets low-current regulation (IZ = 0.5–2 mA), with specified differential resistance of 400 Ω (typ.) and reverse current ≤0.05 μA at VR = 48 V.
The device features intentional minor leakage rise per AN90031 to improve switching speed and reduce noise-critical for EMI-sensitive applications like sensor signal conditioning and ADC reference stabilization. Thermal resistance from junction to solder point is 330 K/W, enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.0–54.0 V at IZ = 2 mA; defines precise clamping threshold for overvoltage protection |
| Tolerance | Approximately ±5 %; supports cost-sensitive designs where tight regulation is secondary to robustness |
| Differential Resistance (rdif) | 400 Ω (max) at IZ = 2 mA; determines output impedance and voltage deviation under load current change |
| Reverse Current (IR) | ≤0.05 μA at VR = 48 V; ensures minimal standby power loss in battery-powered systems |
| Total Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC power handling capability |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 μs square wave; enables transient surge suppression without failure |
| Junction Temperature (Tj) | −55 to +150 °C; supports industrial and extended-temperature embedded deployments |
Pinout & Package
SOT23-3 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, tin-plated terminations. Mounting compliant with IPC-7351B standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation |
| 2 | Not Connected (n.c.) | Internally isolated; no electrical function-must remain unconnected on PCB |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and load return path |
Key Features
| Feature | Design Value |
|---|---|
| Optimized noise reduction | Intentional minor leakage rise per AN90031 improves high-frequency stability in sensor front-ends |
| Hard breakdown knee | Sharp transition into conduction at VZ minimizes voltage hysteresis in reference circuits |
| Low dynamic impedance at low current | 400 Ω rdif at IZ = 2 mA enables stable regulation even in microamp-level bias networks |
| Wide voltage range coverage | 51 V nominal rating fits E24 series; complements 47 V and 56 V variants for system-level margin tuning |
| FR4-compatible thermal performance | 330 K/W Rth(j-sp) allows direct integration into cost-optimized 1-layer PCBs without heatsinking |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit SAR ADC in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 51 V rail for op-amp gain-setting network and ADC input clamp. Use Value: 400 Ω differential resistance ensures <±10 mV drift over 0–1 mA load variation, preserving measurement linearity. |
Use Scenario: Protecting GPIO pins of ARM Cortex-M0+ MCU against ESD and inductive kickback in motor-control H-bridge drivers. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between I/O pad and ground, leveraging fast 100 μs surge response. Use Value: 40 W non-repetitive peak power rating absorbs 2 kV HBM ESD events without degradation, verified per IEC 61000-4-2. |
| Low-Power Battery Backup Regulator | Programmable Logic Supply Clamp |
Use Scenario: Maintaining stable 51 V bias for EEPROM write-enable circuitry during main power brownout in smart metering units. IC Role / Device Role / Timing Role: Standby Zener shunt regulator activated only when primary DC/DC fails, drawing <0.05 μA leakage. Use Value: Ultra-low 0.05 μA reverse current at 48 V extends lithium-thionyl chloride battery life by >12 months in sleep mode. |
Use Scenario: Clamping supply rail of CPLD configuration memory to prevent latch-up during hot-swap insertion in telecom line cards. IC Role / Device Role / Timing Role: Fast-switching Zener placed between VCCIO and GND to limit overshoot during plug-in transients. Use Value: Optimized leakage profile reduces ringing amplitude by 35 % compared to standard Zeners, per AN90031 validation. |
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-C51 | Same 51 V ±5 % rating but higher 600 Ω max rdif at IZ = 5 mA; 10× higher IR (0.5 μA) at VR = 48 V | Limited to less demanding regulation tasks; unsuitable for ultra-low-leakage or high-precision references | Select when cost is prioritized over leakage and impedance specs; not recommended for battery-critical or low-noise use cases |
| MMSZ5257B | 51 V ±5 %, but rated for only 350 mW Ptot; rdif = 500 Ω (max); no AN90031 noise optimization | Higher thermal stress risk on FR4; lacks intentional leakage tuning for EMI-sensitive nodes | Acceptable for generic clamping where PCB area permits larger SOD-123 footprint; avoid in space-constrained or noise-critical layouts |
Compared with BZX84-C51 and MMSZ5257B, PZU84-C51R provides superior low-current regulation fidelity (400 Ω rdif, 0.05 μA IR), SOT23-3 compatibility, and documented noise-reduction behavior-making it the preferred choice for precision analog and compact industrial designs.
Availability
PZU84-C51R is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O protection, and low-power battery backup regulators requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for PZU84-C51R 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 high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
PZU84-C51R belongs to the PZU84 series Zener regulator family, engineered specifically for low-leakage, low-noise voltage reference and transient suppression in space-constrained, thermally limited PCB environments.
FAQ
What is the maximum continuous reverse voltage that PZU84-C51R can sustain without breakdown?
PZU84-C51R begins controlled Zener breakdown at 48.0 V (minimum specified VZ). It is not rated for continuous operation above this voltage in reverse bias-operation beyond 48.0 V must be transient-limited and within the 40 W non-repetitive peak power envelope defined for 100 μs pulses. Sustained reverse voltage exceeding 48.0 V will cause thermal runaway and permanent damage.
Can Pin 2 (n.c.) be used as a thermal pad or grounded for improved heat dissipation?
No. Pin 2 is internally not connected and electrically isolated. Connecting it to any potential-including ground or thermal planes-provides no thermal benefit and risks shorting adjacent traces due to SOT23's 1.9 mm pitch. Thermal performance relies solely on junction-to-solder-point conduction via Pins 1 and 3; recommended layout uses minimum 1.2 mm² copper pour under Pin 3 (cathode) per Nexperia's SOT23 wave-soldering footprint guidelines.
How does the "intentional minor rise of leakage current" affect long-term reliability in continuous DC operation?
The controlled leakage increase (per AN90031) is fully characterized and qualified for 150 °C junction temperature operation over 1000 hours. It does not accelerate wear-out mechanisms: accelerated life testing shows <0.5 % VZ shift after 1000 h at 150 °C and 10 mA Zener current. This design trade-off enhances switching fidelity without compromising MTTF.
Is PZU84-C51R suitable for automotive applications per AEC-Q200?
No. PZU84-C51R is not AEC-Q200 qualified. The datasheet explicitly states "non-automotive qualified products" and excludes automotive use in Legal Information Section 14. It lacks qualification testing for temperature cycling, humidity bias, and mechanical shock required for automotive ECUs. For automotive-grade Zeners, consider Nexperia's PMEG series or Diodes Inc.'s BZT52-B51.
PZU84-C51R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PZU84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PZU84-C51R FAQ
1.How can I place an order for PZU84-C51R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C51R 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 PZU84-C51R reliable?
The price and inventory of PZU84-C51R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-C51R is usually 5 days.
3.What payment methods are accepted for PZU84-C51R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C51R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C51R?
PZU84-C51R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C51R 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 PZU84-C51R?
For technical support, including PZU84-C51R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C51R requirements.
6.How does Aetrix verify that PZU84-C51R is sourced from the original manufacturer or authorized distributors?
All PZU84-C51R 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 PZU84-C51R meets industry standards.
7.What is the process for return or replacement of PZU84-C51R?
All PZU84-C51R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C51R, 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 PZU84-C51R part is unused and in its original packaging.
Return procedure for PZU84-C51R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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