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Nexperia USA Inc. HPZR-C33-QX
- Part No.:
- HPZR-C33-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
HPZR-C33-QX.pdf
- Description:
- DIODE ZENER 33V 682MW SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
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Product details
Overview
HPZR-C33-QX from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision voltage clamping and regulation in automotive power rails. It delivers 33 V nominal working voltage at IZ = 20 mA, ≤0.1 µA reverse current, 28 Ω differential resistance, 5.5 W total power dissipation at Tsp = 75 °C, and 30 kV ESD rating per IEC 61000-4-2 (contact discharge), used in engine control unit (ECU) supply rail protection.
For engineers reviewing the HPZR-C33-QX datasheet, HPZR-C33-QX pinout, HPZR-C33-QX application, or HPZR-C33-QX equivalent, this page provides verified pin functions, thermal derating curves, AEC-Q101 qualification status, junction-to-solder-point thermal resistance (18 K/W), and direct automotive-grade alternatives with validated voltage tolerance and surge capability.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias voltage regulation under transient overvoltage conditions. Its 33 V nominal Zener voltage is specified at 20 mA test current with ±5 % tolerance, and it maintains low dynamic impedance (28 Ω) to minimize output voltage variation during load transients.
Thermal design centers on junction-to-solder-point conduction (Rth(j-sp) = 18 K/W), enabling high DC power handling (5.5 W at zero-lead-length measurement) when mounted on FR4 PCBs with 1 cm² cathode pad. Non-repetitive peak power capability reaches 800 W for pulses ≤100 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 33 V at IZ = 20 mA - defines regulated clamp level for 12 V/24 V automotive subsystems |
| Zener Voltage Tolerance | ±5 % - ensures predictable clamping window across production lots |
| Differential Resistance (RZ) | 28 Ω at IZ = 20 mA - limits output voltage shift under ±10 mA load change to ±0.28 V |
| Total Power Dissipation (Ptot) | 5500 mW at Tsp = 75 °C (zero lead length) - supports sustained regulation in thermally constrained ECUs |
| ESD Rating | 30 kV per IEC 61000-4-2 contact discharge - protects against human-body and assembly-line electrostatic events |
| Junction Temperature Limit | 175 °C - enables operation in under-hood environments with ambient up to +125 °C |
| Reverse Current (IR) | ≤0.1 µA at VR = 26.4 V - ensures minimal leakage in battery-sensitive always-on circuits |
Pinout & Package
HPZR-C33-QX uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat leads, low-profile profile optimized for automated reflow soldering on FR4 PCBs with 1.1 mm × 1.4 mm solder land footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries full surge current during clamping |
| 2 | Anode (A) | Connected to ground or reference potential; forms reverse-bias path enabling Zener breakdown at 33 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress-test standard, including temperature cycling, HTRB, and ESD |
| High surge robustness | 800 W non-repetitive peak power (tp ≤ 100 µs) withstands ISO 7637-2 pulse 1 and pulse 2a transients |
| Low thermal resistance | Rth(j-sp) = 18 K/W enables efficient heat transfer from die to PCB copper via cathode tab |
| Precision voltage tolerance | ±5 % VZ at 20 mA allows tight margining in 3.3 V–33 V regulation zones without external trimming |
| Low leakage performance | IR ≤ 0.1 µA at 80 % VZ minimizes standby current in always-on vehicle networks |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Clamps 12 V battery line against load-dump transients (ISO 7637-2 Pulse 5a) in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Two-terminal passive Zener clamp placed between VBAT and ground, conducting only during overvoltage events ≥33 V. Use Value: Limits rail voltage to 33 V ±5 %, protecting downstream 3.3 V/5 V LDOs and microcontrollers without adding active circuitry or delay. |
Use Scenario: Stabilizes 5 V logic supply in BCMs exposed to alternator ripple and ignition noise. IC Role / Device Role / Timing Role: Shunt regulator maintaining reference point for CAN transceivers and sensor interfaces during 100 ms–1 s voltage excursions. Use Value: Maintains <33 V clamping with 28 Ω dynamic impedance, reducing ripple-induced timing jitter in LIN bus clock recovery. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Filtering | Electric Power Steering (EPS) Motor Driver Gate Protection |
Use Scenario: Suppresses switching noise coupled into 12 V camera module input from adjacent DC-DC converters. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 µA) shunt element filtering high-frequency transients above 1 MHz while preserving quiescent current budget. Use Value: Enables clean 12 V input to image sensor LDOs, reducing pixel noise without degrading sleep-mode current below 10 µA. |
Use Scenario: Protects high-side gate drivers in EPS motor inverters from inductive kickback during MOSFET turn-off. IC Role / Device Role / Timing Role: Fast-response Zener (tr < 10 ns) clamping gate-source voltage to prevent driver IC latch-up during 50 A–100 A dI/dt events. Use Value: Withstands 800 W surge pulses (≤100 µs), preventing gate oxide damage while maintaining <10 ns response to 200 V/µs dv/dt. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33,115 (Nexperia) | Same 33 V nominal Zener, but SOT23 package; Ptot = 300 mW; Rth(j-a) = 400 K/W; not AEC-Q101 qualified | Limited to low-power consumer boards; insufficient for automotive surge immunity or thermal load | Select only for cost-sensitive non-automotive prototypes where 300 mW continuous dissipation suffices |
| 1N4742A (ON Semiconductor) | 33 V Zener, DO-41 through-hole; Ptot = 1 W; no AEC-Q101 qualification; RZ = 35 Ω; ESD rating unspecified | Requires manual assembly; lacks automotive thermal and ESD robustness; unsuitable for SMT production | Use only in legacy repair or educational kits where board space and reliability requirements are relaxed |
Compared with BZX84-C33,115 and 1N4742A, HPZR-C33-QX delivers 18× higher power handling, 22× lower thermal resistance, certified AEC-Q101 compliance, and 30 kV ESD protection-making it the sole choice for production automotive electronics requiring long-term reliability under thermal and electrical stress.
Availability
HPZR-C33-QX 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 with automotive-grade traceability and lifecycle continuity.
Supply support for HPZR-C33-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 global semiconductor expert specializing in high-performance, reliable discrete and analog devices, with leadership in automotive-qualified components and energy-efficient solutions.
The HPZR-Q series targets automotive power rail protection, delivering high-power Zener regulation in compact SMD packages with AEC-Q101 validation, optimized for under-hood thermal and ESD resilience.
FAQ
What is the maximum continuous power dissipation of HPZR-C33-QX at 105 °C ambient?
At Tamb = 105 °C, HPZR-C33-QX derates to approximately 2.1 W based on its thermal curve (Fig. 9). This value assumes mounting on FR4 PCB with 1 cm² cathode pad and zero-lead-length measurement condition, aligning with the 5.5 W rating at Tsp = 75 °C.
Does HPZR-C33-QX support bidirectional transient suppression?
No. HPZR-C33-QX is a unidirectional Zener diode configured for reverse-bias clamping only. It conducts when cathode voltage exceeds anode by ≥33 V. Forward conduction (anode > cathode) behaves as a standard silicon diode with ~1 V forward drop at 100 mA, not rated for surge suppression.
How does the 30 kV ESD rating apply to real-world PCB layout?
The 30 kV rating applies specifically to contact discharge at the cathode solder point per IEC 61000-4-2. To maintain this performance, the cathode pad must be directly connected to a solid ground plane with minimum trace inductance; avoid vias or narrow traces between cathode and ground.
Is HPZR-C33-QX compatible with lead-free reflow profiles?
Yes. HPZR-C33-QX is qualified for standard lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The CFP3 package outline (Fig. 10) specifies a recommended stencil thickness of 0.1 mm and 1.1 mm × 1.4 mm solder land dimensions for optimal wetting and void control.
HPZR-C33-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- HPZR-Q
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 682 mW
- Impedance (Max) (Zzt):
- 43.46 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 28 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Operating Temperature:
- 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
HPZR-C33-QX FAQ
1.How can I place an order for HPZR-C33-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for HPZR-C33-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 HPZR-C33-QX reliable?
The price and inventory of HPZR-C33-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HPZR-C33-QX is usually 5 days.
3.What payment methods are accepted for HPZR-C33-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HPZR-C33-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HPZR-C33-QX?
HPZR-C33-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HPZR-C33-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 HPZR-C33-QX?
For technical support, including HPZR-C33-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HPZR-C33-QX requirements.
6.How does Aetrix verify that HPZR-C33-QX is sourced from the original manufacturer or authorized distributors?
All HPZR-C33-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 HPZR-C33-QX meets industry standards.
7.What is the process for return or replacement of HPZR-C33-QX?
All HPZR-C33-QX units undergo pre-shipment inspection (PSI). If there is an issue with HPZR-C33-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 HPZR-C33-QX part is unused and in its original packaging.
Return procedure for HPZR-C33-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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