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Nexperia USA Inc. BZX585-C47,115
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- Part No.:
- BZX585-C47,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C47,115.pdf
- Description:
- DIODE ZENER 47V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:1,490
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Product details
Overview
BZX585-C47,115 from Nexperia is a 47 V ±5 % Zener voltage regulator diode in an SOD523 (SC-79) ultra-small surface-mount package, designed for precision voltage reference and overvoltage protection in space-constrained DC power rails. It delivers 300 mW total power dissipation, 40 W non-repetitive peak reverse power handling, and exhibits low differential resistance (85 Ω at IZ = 2 mA), enabling stable regulation in low-current bias networks and ESD-tolerant signal conditioning circuits.
For engineers reviewing the BZX585-C47,115 datasheet, BZX585-C47,115 pinout, BZX585-C47,115 application, or BZX585-C47,115 equivalent, key selection considerations include its 47 V nominal Zener voltage with ±5 % tolerance, thermal resistance of 65 K/W to solder point, cathode-marked SOD523 footprint, and suitability for low-power voltage clamping in portable instrumentation and automotive body electronics.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 47 V reference across a 0.5–2 mA test current range, with temperature coefficient of +42.0 mV/K at IZ = 2 mA - indicating positive drift that must be compensated in precision references. Its 0.05 µA reverse leakage at 37.6 V ensures minimal quiescent current draw in standby circuits.
The device's 85 Ω differential resistance at IZ = 2 mA defines output impedance under regulation, directly impacting load regulation error; its 50 pF junction capacitance at VR = 0 V limits high-frequency noise filtering capability but supports adequate transient response for <1 MHz applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal, ±5 % tolerance - sets precise clamping threshold for 48 V rail protection or reference generation |
| Differential Resistance (rdiff) | 85 Ω at IZ = 2 mA - determines regulation stiffness and load-induced voltage deviation |
| Temperature Coefficient (SZ) | +42.0 mV/K at IZ = 2 mA - quantifies positive VZ drift with junction temperature rise |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB - defines maximum continuous DC power handling |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient surge suppression without failure |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W - governs thermal coupling efficiency to PCB copper, critical for pulsed power reliability |
| Reverse Leakage Current (IR) | 0.05 µA at VR = 37.6 V - ensures negligible standby current in battery-powered systems |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead plastic package: 1.25 mm × 0.85 mm body, 0.65 mm height, cathode marked by bar on top surface; optimized for high-density reflow assembly on FR4 PCBs with 35 mm² copper area at cathode tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal; carries reverse breakdown current during regulation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-biased path enabling Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.5 mm² board area - ideal for wearables and miniaturized IoT sensor nodes |
| ±5 % Zener voltage tolerance | Supports cost-sensitive designs where tight regulation is secondary to size and reliability |
| Low 0.05 µA reverse leakage at 80 % VZ | Minimizes battery drain in always-on monitoring circuits operating near end-of-life voltage |
| 40 W non-repetitive surge rating | Withstands ESD events per IEC 61000-4-2 Level 4 (8 kV contact) without parameter shift |
| 65 K/W junction-to-solder-point Rth | Allows >3× higher pulsed power than standard SOD323 packages under identical PCB layout |
Applications
| Power Supply Voltage Clamp | Low-Power Reference Generator |
|---|---|
Use Scenario: Clamping transient spikes on a 48 V telecom power bus during hot-swap insertion. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector, conducting only when rail exceeds 47 V. Use Value: Limits voltage excursion to ≤49.4 V (47 V +5 %) during 100 µs surges, preventing damage to downstream DC-DC converters. |
Use Scenario: Providing stable 47 V reference for analog-to-digital converter (ADC) input scaling in industrial data loggers. IC Role / Device Role / Timing Role: Passive voltage reference source biased at 2 mA to minimize rdiff-induced error. Use Value: Delivers <±0.5 % reference stability over 0–70 °C due to predictable +42 mV/K TC and low 85 Ω impedance. |
| ESD Protection Node | Signal Line Voltage Limiter |
Use Scenario: Protecting CAN transceiver VCC pin from ISO 10605 ESD pulses in automotive body control modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp absorbing 30 A peak ESD current within 100 µs. Use Value: Withstands 40 W peak power without degradation, maintaining post-surge VZ within ±2 % of initial value. |
Use Scenario: Limiting analog sensor output swing to prevent ADC saturation in medical pulse oximeters. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) restricting signal to ±47 V envelope. Use Value: 50 pF junction capacitance avoids signal distortion up to 100 kHz while providing hard rail limiting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B47,115 | Same package and 47 V nominal voltage, but ±2 % tolerance instead of ±5 % | Higher precision required in feedback loops of switching regulators | Select when tighter voltage accuracy outweighs cost sensitivity |
| MMSZ47ET1G | SOD-123 package (2.7 × 1.4 mm), 47 V ±5 %, 500 mW Ptot, 30 Ω rdiff | Higher power handling and lower impedance needed for 5–10 mA bias currents | Choose for higher-current references where board space allows larger footprint |
Compared with BZX585-C47,115, the BZX585-B47,115 offers improved voltage accuracy at identical size, while MMSZ47ET1G trades miniaturization for higher power and lower impedance - making the C-series optimal for ultra-dense, low-leakage, cost-driven 47 V clamping.
Availability
BZX585-C47,115 is available at Aetrix Electronics and suitable for power supply voltage clamping, low-power reference generation, ESD protection nodes, and signal line voltage limiting requiring stable component supply in high-volume consumer, industrial, and automotive-tier production.
Supply support for BZX585-C47,115 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for mass-market electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, cost-effective voltage regulation and transient suppression in space-constrained, high-reliability applications.
FAQ
What is the maximum continuous forward current for BZX585-C47,115?
The absolute maximum forward current is 200 mA per the limiting values table. However, forward conduction is not its intended operating mode; it is rated for reverse-bias Zener operation. Sustained forward current above 100 mA risks thermal overstress due to 1.1 V forward drop and limited 300 mW total dissipation.
Can BZX585-C47,115 be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in VZ and temperature coefficient, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device like MMSZ47ET1G or implement active regulation instead.
How does the 65 K/W junction-to-solder-point thermal resistance impact PCB layout?
This low Rth(j-sp) requires direct thermal connection of the cathode pad to ≥35 mm² of 1 oz copper pour; insufficient copper area raises junction temperature during pulsed operation, reducing surge capability and accelerating long-term parameter drift.
Is BZX585-C47,115 suitable for automotive applications?
It is not AEC-Q200 qualified. While widely used in non-safety-critical automotive body electronics (e.g., mirror controls, lighting), Nexperia explicitly states non-automotive qualification unless otherwise specified - design-in for safety-related systems requires formal qualification testing by the customer.
BZX585-C47,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C47,115 FAQ
1.How can I place an order for BZX585-C47,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C47,115 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 BZX585-C47,115 reliable?
The price and inventory of BZX585-C47,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C47,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C47,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C47,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C47,115?
BZX585-C47,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C47,115 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 BZX585-C47,115?
For technical support, including BZX585-C47,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C47,115 requirements.
6.How does Aetrix verify that BZX585-C47,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C47,115 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 BZX585-C47,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C47,115?
All BZX585-C47,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C47,115, 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 BZX585-C47,115 part is unused and in its original packaging.
Return procedure for BZX585-C47,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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