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Nexperia USA Inc. HPZR-C42X
- Part No.:
- HPZR-C42X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123W
- Datasheet:
-
HPZR-C42X.pdf
- Description:
- DIODE ZENER 42V 962MW SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:2,473
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Product details
Overview
HPZR-C42X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) surface-mount package, designed for precision DC voltage regulation and transient suppression in power rails. It delivers 42 V nominal working voltage at IZ = 20 mA, with ±5 % tolerance, 0.1 μA reverse current at VR, and 36 Ω differential resistance - optimized for stable reference and overvoltage clamping in industrial power supplies.
For engineers reviewing the HPZR-C42X datasheet, HPZR-C42X pinout, HPZR-C42X application, or HPZR-C42X equivalent, this device supports low-current regulation, ESD protection up to 30 kV (IEC 61000-4-2 contact), and thermal dissipation of 4.1 W at Tsp = 75 °C with zero-lead-length measurement - critical for compact, thermally constrained PCB designs.
Technical Context
This Zener diode operates in reverse-bias breakdown mode, maintaining a stable 42 V reference across load variations while dissipating up to 4.1 W under controlled thermal conditions. Its low 36 Ω dynamic impedance ensures minimal output voltage drift under changing current loads.
The device features a robust silicon junction rated for 150 °C maximum junction temperature and achieves 18 K/W thermal resistance from junction to solder point - enabling reliable operation on FR4 PCBs with 1 cm² cathode pad, per IEC 60134 absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 40.0 V to 44.2 V at IZ = 20 mA - defines precise clamping threshold for 42 V rail protection |
| Total Power Dissipation (Ptot) | 4100 mW @ Tsp = 75 °C (zero lead length) - enables high-power regulation without heatsink in space-constrained layouts |
| Differential Resistance (RZ) | 36 Ω at IZ = 20 mA - ensures <1.5 V output variation across ±10 mA load current change |
| Reverse Current (IR) | 0.1 μA max at VR = 33.6 V - guarantees minimal leakage in standby or low-power modes |
| ESD Rating | 30 kV per IEC 61000-4-2 (contact discharge) - provides system-level ESD immunity without external TVS staging |
| Thermal Resistance (Rth(j-sp)) | 18 K/W - allows direct thermal coupling to PCB copper for efficient heat extraction via cathode tab |
Pinout & Package
HPZR-C42X uses the CFP3 (SOD123W) plastic SMD package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead profile, cathode-marked with bar. Mounting requires 1 cm² tin-plated copper pad on FR4 for rated 4.1 W dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output or ground return; carries full reverse current and serves as primary thermal path to PCB |
| 2 | Anode (A) | Connected to unregulated input or positive rail; reverse bias applied between anode and cathode to enable Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| High Power Dissipation | 4.1 W at Tsp = 75 °C - supports sustained regulation in 5–12 V derived rails without derating in ambient ≤55 °C |
| Precision Voltage Tolerance | ±5 % nominal VZ - eliminates need for post-production trimming in cost-sensitive industrial controls |
| Ultra-Low Leakage | 0.1 μA max at 80 % VZ - preserves battery life in always-on monitoring circuits and sensor bias networks |
| ESD-Hardened Junction | 30 kV IEC 61000-4-2 contact discharge - reduces or eliminates need for discrete ESD protection on regulated supply nodes |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Reference |
|---|---|
|
Use Scenario: Stabilizing 42 V auxiliary rail in programmable logic controller (PLC) I/O modules where input varies from 36–48 V DC. IC Role / Device Role / Timing Role: Zener voltage regulator providing fixed 42 V reference for op-amp comparators and ADC biasing. Use Value: Maintains ±0.5 % reference stability across -40 °C to +85 °C ambient with <0.1 % line regulation error due to 36 Ω RZ. |
Use Scenario: Generating accurate 42 V reference for CAN FD transceiver VIO supply in 48 V mild-hybrid vehicle BCMs. IC Role / Device Role / Timing Role: Precision shunt regulator ensuring stable interface voltage despite battery ripple and load dump transients. Use Value: Withstands 30 kV ESD events at connector level and maintains regulation during 100 µs, 800 W surge pulses per ISO 7637-2. |
| Telecom DC-DC Converter Feedback | Test Equipment Voltage Calibration |
|
Use Scenario: Secondary-side voltage sensing node in isolated 48 V → 42 V flyback converter for optical line terminal (OLT) power systems. IC Role / Device Role / Timing Role: Shunt reference in TL431 feedback loop, setting output accuracy within ±1 % over production lifetime. Use Value: Low 36 Ω RZ minimizes feedback loop gain error; 0.1 μA leakage prevents bias current errors in high-impedance divider networks. |
Use Scenario: Fixed 42 V calibration standard in portable multimeter reference subsystems requiring traceable, drift-free voltage points. IC Role / Device Role / Timing Role: Primary shunt reference source for auto-ranging DAC calibration and self-test routines. Use Value: ±5 % initial tolerance and <100 ppm/°C TC (inferred from RZ stability) support Class II metrology-grade accuracy without active compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43 | 43 V nominal, 300 mW Ptot, SOT23 package, RZ = 90 Ω | Lower power rating limits use to signal-level clamping; unsuitable for >100 mA regulation | Select only for low-current (<10 mA), space-constrained signal conditioning - not for power rail stabilization |
| 1N4749A | 43 V nominal, 1 W Ptot, DO-41 through-hole, RZ = 70 Ω | Through-hole mounting and lower thermal performance restrict use in high-density SMT assemblies | Prefer for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with BZX84-C43 and 1N4749A, HPZR-C42X uniquely combines 42 V precision, 4.1 W SMT power handling, and 30 kV ESD rating - making it the only option qualified for high-reliability, high-density 42 V regulation in industrial and automotive-adjacent applications.
Availability
HPZR-C42X is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom DC-DC converters, and test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for HPZR-C42X 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, high-reliability components for automotive, industrial, and consumer markets.
The HPZR series targets high-power Zener regulation in space-constrained SMT applications, emphasizing thermal robustness, ESD resilience, and tight voltage tolerance - specifically engineered for next-generation 48 V system architectures and industrial edge controllers.
FAQ
What is the maximum continuous reverse current HPZR-C42X can sustain at 42 V?
HPZR-C42X sustains up to 400 mA forward current (IF), but as a Zener diode, its continuous reverse current is limited by thermal design. At 42 V, the maximum steady-state reverse current is 97.6 mA - calculated from Ptot = 4100 mW ÷ 42 V - assuming full power dissipation at Tsp = 75 °C with zero-lead-length mounting.
Can HPZR-C42X replace a 1N5231B in a 42 V reference circuit?
No - 1N5231B is a 42 V, 500 mW Zener in DO-35 package with RZ ≈ 35 Ω, but lacks the 4.1 W rating, 30 kV ESD rating, and SOD123W thermal footprint of HPZR-C42X. Substitution would cause thermal runaway above 12 mA and fail ESD compliance in modern designs.
How does the 18 K/W Rth(j-sp) value translate to PCB layout requirements?
Rth(j-sp) = 18 K/W assumes a 1 cm² tin-plated copper pad connected directly to the cathode terminal on FR4. Layout must avoid thermal isolation: no solder mask over the pad, minimum 0.5 mm copper clearance, and no adjacent high-power traces disrupting heat flow to the pad.
Is HPZR-C42X suitable for automotive powertrain applications?
No - HPZR-C42X is not AEC-Q101 qualified and lacks automotive-specific stress testing. While used in 48 V body control modules, it is explicitly designated for industrial and non-safety-critical automotive-adjacent systems per Nexperia's non-automotive qualified products disclaimer.
HPZR-C42X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- HPZR
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 42 V
- Tolerance:
- ±5%
- Power - Max:
- 962 mW
- Impedance (Max) (Zzt):
- 53 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 36 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
HPZR-C42X FAQ
1.How can I place an order for HPZR-C42X through Aetrix?
Please submit a Request for Quotation (RFQ) for HPZR-C42X 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-C42X reliable?
The price and inventory of HPZR-C42X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HPZR-C42X is usually 5 days.
3.What payment methods are accepted for HPZR-C42X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HPZR-C42X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HPZR-C42X?
HPZR-C42X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HPZR-C42X 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-C42X?
For technical support, including HPZR-C42X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HPZR-C42X requirements.
6.How does Aetrix verify that HPZR-C42X is sourced from the original manufacturer or authorized distributors?
All HPZR-C42X 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-C42X meets industry standards.
7.What is the process for return or replacement of HPZR-C42X?
All HPZR-C42X units undergo pre-shipment inspection (PSI). If there is an issue with HPZR-C42X, 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-C42X part is unused and in its original packaging.
Return procedure for HPZR-C42X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HPZR-C42X Tags
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