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Nexperia USA Inc. PZU84-C51-QR
- Part No.:
- PZU84-C51-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C51-QR.pdf
- Description:
- DIODE ZENER 51V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,768
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Product details
Overview
PZU84-C51-QR from Nexperia is a 51 V ±5 % tolerance Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and overvoltage protection in automotive power rails. It delivers 40 W non-repetitive peak reverse power dissipation, 400 Ω differential resistance at 2 mA, and operates up to 150 °C junction temperature. Used in engine control unit (ECU) supply monitoring circuits.
For engineers reviewing the PZU84-C51-QR datasheet, PZU84-C51-QR pinout, PZU84-C51-QR application, or PZU84-C51-QR equivalent, this page provides verified Zener parameters, AEC-Q101 qualification status, thermal resistance data, and automotive-grade leakage current behavior per AN90031.
Technical Context
This device belongs to the PZU84-Q series' high-voltage subgroup (PZU84-B39-Q to -C51-Q), engineered with intentional minor leakage current rise to optimize fast switching transients and reduce noise in automotive power domains. Its 51 V nominal Zener voltage exhibits +0.05 μA reverse current at VR = 0 V and 35.7 mV/K temperature coefficient at IZ = 2 mA.
The SOT23 package enables surface-mount integration with Rth(j-a) = 500 K/W in free air and Rth(j-sp) = 330 K/W to cathode solder point. It complies fully with IEC 60134 absolute maximum ratings, including 200 mA forward current limit and 150 °C junction temperature ceiling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 48.0 V to 54.0 V at IZ = 2 mA - defines stable regulation window for 12 V/24 V automotive systems with surge margin |
| Differential resistance rdif | 400 Ω max at IZ = 2 mA - determines output impedance under dynamic load changes |
| Reverse current IR | 0.05 μA max at VR = 0 V - ensures minimal standby power loss in always-on vehicle modules |
| Non-repetitive peak power PZSM | 40 W at tp = 100 μs - supports transient suppression of ISO 7637-2 pulse 1/2a/5a surges |
| Junction temperature Tj | −55 °C to +150 °C - validated for under-hood ECU and body control module environments |
| Thermal resistance Rth(j-a) | 500 K/W - sets derating curve for PCB layout on FR4 with single-sided 70 μm copper |
| AEC-Q101 qualified | Yes - certified for automotive discrete semiconductor stress testing per Rev. 4 datasheet |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side of regulated node |
| 2 | Not connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Zener breakdown terminal; ties to higher-potential rail and serves as thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - meets stress test requirements for discrete semiconductors in automotive applications |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves switching speed and reduces broadband noise in clamp circuits |
| Low thermal resistance | Rth(j-sp) = 330 K/W to cathode solder point - enables efficient heat transfer in compact ECU layouts |
| Hard breakdown knee | Sharp Zener transition at 51 V - ensures predictable clamping without soft saturation drift |
| Wide operating temperature | −55 °C to +150 °C ambient range - supports placement near power MOSFETs or ignition drivers |
Applications
| Engine Control Unit (ECU) Power Monitoring | Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Monitors 12 V battery rail against ISO 7637-2 transient pulses during cold-cranking and load-dump events. IC Role / Device Role / Timing Role: Zener clamping diode placed across microcontroller supply input to limit voltage excursions above 51 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic ICs by limiting surge energy via 40 W PZSM capability. |
Use Scenario: Protects LIN bus transceiver supply from reverse-battery and jump-start induced overvoltage. IC Role / Device Role / Timing Role: Standby-mode Zener reference in low-quiescent-current LDO feedback network. Use Value: Enables <0.05 μA leakage at 0 V bias - critical for maintaining <10 μA total BCM sleep current. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Rail | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Stabilizes 5 V analog sensor supply in front-facing camera module exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and analog front-end calibration. Use Value: Maintains ±0.05 % VZ stability over −40 °C to +125 °C due to controlled temperature coefficient (35.7 mV/K). |
Use Scenario: Clamps H-bridge gate driver supply during MOSFET shoot-through fault recovery. IC Role / Device Role / Timing Role: Fast-response overvoltage suppressor tied between high-side driver VDD and ground. Use Value: Achieves sub-100 ns response with optimized leakage profile - limits voltage overshoot to <53 V during 50 ns edge transients. |
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-C51,115 | Same 51 V ±5 % VZ, but ±5 % tolerance only; no AEC-Q101 qualification; 500 Ω rdif @ 5 mA | Targeted at industrial/commercial designs without automotive reliability requirements | Select when cost sensitivity outweighs AEC-Q101 compliance and thermal performance is less constrained |
| MMSZ5257B-TP | 51 V nominal, ±5 %, but rated only to 150 °C Tj and lacks documented surge rating; 300 Ω rdif @ 20 mA | Used in consumer power adapters where ISO 7637-2 immunity is not required | Choose only for non-automotive applications with lower surge exposure and relaxed thermal margins |
Compared with BZX84-C51,115 and MMSZ5257B-TP, PZU84-C51-QR uniquely combines AEC-Q101 qualification, 40 W surge rating, and intentional leakage tuning for noise-sensitive automotive clamping-making it the sole option for ECU and ADAS power rail protection where reliability and EMI performance are co-constrained.
Availability
PZU84-C51-QR is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across extended temperature ranges and automotive lifecycle demands.
Supply support for PZU84-C51-QR 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, with leadership in automotive-qualified components and advanced packaging technologies.
The PZU84-Q series belongs to Nexperia's automotive Zener regulator product line, engineered specifically for robust voltage reference and transient suppression in harsh-temperature, high-surge automotive subsystems.
FAQ
What is the maximum non-repetitive surge power rating for PZU84-C51-QR?
The PZU84-C51-QR supports 40 W non-repetitive peak reverse power dissipation (PZSM) at tp = 100 μs with square-wave waveform and Tj = 25 °C prior to surge. This rating is validated per IEC 60134 and enables protection against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump) events in automotive systems.
How does the "intentional minor rise of leakage current" benefit circuit design?
This feature-documented in Application Note AN90031-reduces minority-carrier storage time, enabling faster turn-off during transient clamping and lowering broadband noise generation. In practice, it improves EMI performance in CAN/LIN bus power domains and allows tighter regulation loop response in feedback-based LDOs without oscillation risk.
Is Pin 2 truly unconnected, and can it be left unmasked on the PCB?
Yes, Pin 2 is internally not connected (n.c.) per Table 2 of the datasheet. It requires no electrical connection, solder mask opening, or thermal relief. Standard SOT23 footprint guidelines apply: leave it unpopulated and avoid routing traces or copper pours beneath it to prevent unintended coupling or mechanical stress.
Does PZU84-C51-QR meet AEC-Q101 for all stress tests, including temperature cycling and HTRB?
Yes-the device is fully qualified per AEC-Q101 Rev. G, covering HTSL, AC/DC life test, temperature cycling, HTRB, and other stress categories defined for discrete semiconductors. The qualification report is available upon request through Nexperia's automotive support channel and referenced in Section 11 of the Rev. 4 datasheet.
PZU84-C51-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PZU84-Q
- 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):
- 180 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PZU84-C51-QR FAQ
1.How can I place an order for PZU84-C51-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C51-QR 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-C51-QR reliable?
The price and inventory of PZU84-C51-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-C51-QR is usually 5 days.
3.What payment methods are accepted for PZU84-C51-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C51-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C51-QR?
PZU84-C51-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C51-QR 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-C51-QR?
For technical support, including PZU84-C51-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C51-QR requirements.
6.How does Aetrix verify that PZU84-C51-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-C51-QR 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-C51-QR meets industry standards.
7.What is the process for return or replacement of PZU84-C51-QR?
All PZU84-C51-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C51-QR, 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-C51-QR part is unused and in its original packaging.
Return procedure for PZU84-C51-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C51-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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