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Nexperia USA Inc. BZX585-C30,115
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- Part No.:
- BZX585-C30,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C30,115.pdf
- Description:
- DIODE ZENER 30V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,482
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Product details
Overview
BZX585-C30,115 from Nexperia is a 30 V ±5 % Zener voltage regulator diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision voltage reference and overvoltage clamping in low-power analog signal conditioning circuits.
For engineers reviewing the BZX585-C30,115 datasheet, BZX585-C30,115 pinout, BZX585-C30,115 application, or BZX585-C30,115 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (70 Ω at IZ = 2 mA), thermal resistance (65 K/W junction-to-solder point), and ultra-small SMD footprint for space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 30 V regulation across load and line variations, with temperature coefficient of +24.4 mV/K at IZ = 2 mA - indicating positive drift optimized for mid-range voltage references. Its low 70 Ω differential resistance ensures minimal output impedance under dynamic current changes.
Designed for surface-mount assembly on FR4 PCBs with ≥35 mm² copper area at cathode tab, it achieves Rth(j-sp) = 65 K/W and supports surge handling up to 1 A (100 µs square wave) without degradation, enabling robust transient suppression in sensor front-ends and power rail monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, ±5 % tolerance (28.5 V to 31.5 V) - defines precise clamping threshold for 3.3 V/5 V system rails. |
| Differential Resistance (rdiff) | 70 Ω at IZ = 2 mA - ensures <140 mV output variation per 2 mA load change, critical for stable biasing. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² Cu - sets continuous DC regulation limit in compact layouts. |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for 100 µs square wave - enables single-event ESD/transient suppression without failure. |
| Reverse Current (IR) | ≤0.05 µA at VR = 22.5 V - guarantees negligible leakage in high-impedance reference nodes. |
| Junction-to-Solder Point Thermal Resistance | 65 K/W - allows direct thermal coupling to PCB copper for reliable operation up to 150 °C junction temperature. |
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 band on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD footprint | SOD523 (1.25 × 0.85 mm) enables routing in 0.4 mm pitch designs and reduces board area by >50 % vs. SOD323. |
| Low differential resistance | 70 Ω at 2 mA ensures tight voltage regulation under varying load conditions in precision analog stages. |
| Controlled temperature coefficient | +24.4 mV/K at IZ = 2 mA provides predictable, moderate positive drift for compensated reference designs. |
| High surge robustness | Withstands 1 A non-repetitive peak reverse current (100 µs) - suitable for IEC 61000-4-2 Level 4 ESD protection. |
Applications
| Power Supply Rail Clamping | Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Protecting 3.3 V microcontroller I/O pins from transient overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Zener clamp referenced to ground, conducting only when input exceeds 30 V threshold. Use Value: Limits voltage excursion to safe levels using 40 W surge capability, preventing latch-up without external series resistor. |
Use Scenario: Providing stable 30 V reference for op-amp-based current-sense amplifier gain setting. IC Role / Device Role / Timing Role: Precision voltage reference source with 70 Ω dynamic impedance stabilizing feedback network. Use Value: Enables <±0.5 % full-scale accuracy in 24-bit ADC systems by minimizing reference drift under load variation. |
| Low-Power Voltage Monitoring | Industrial Analog Input Protection |
|
Use Scenario: Detecting undervoltage condition on 24 V DC industrial bus via resistive divider into comparator. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed 30 V node for accurate scaling of divided bus voltage. Use Value: Delivers 0.05 µA max leakage at 22.5 V, eliminating measurement error in high-impedance divider networks. |
Use Scenario: Safeguarding 4–20 mA transmitter output stage against field-wiring faults and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed across output terminals before current-limiting transistor. Use Value: Absorbs 40 W transient energy within 100 µs, preventing damage to sensitive DAC and driver circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B30,115 | ±2 % tolerance (29.4–30.6 V) vs. ±5 %; 60 Ω rdiff at 5 mA | Tighter regulation required in metrology-grade references where 0.6 V window is unacceptable | Select when absolute voltage accuracy outweighs cost sensitivity and board space constraints |
| MMSZ5257ET1G | SOD-123 package (2.7 × 1.6 mm); 30 V ±5 %; 100 Ω rdiff at 20 mA | Higher power handling (500 mW) but larger footprint and higher impedance limits use in low-current references | Choose for legacy designs requiring backward-compatible footprints or higher continuous dissipation |
Compared with BZX585-C30,115, the BZX585-B30,115 offers tighter voltage control at the expense of slightly higher cost, while MMSZ5257ET1G trades miniaturization for greater thermal margin and relaxed layout density requirements.
Availability
BZX585-C30,115 is available at Aetrix Electronics and suitable for power supply rail clamping, sensor signal conditioning, low-power voltage monitoring, and industrial analog input protection requiring stable component supply and consistent parametric performance.
Supply support for BZX585-C30,115 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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and robustness for mass-market electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous forward current rating for BZX585-C30,115?
The absolute maximum forward current is 200 mA per limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 1.1 V at 100 mA risks thermal overstress due to 300 mW total power limit and 350 K/W junction-to-ambient thermal resistance.
Can BZX585-C30,115 be used in place of a 24 V Zener diode?
No - its nominal Zener voltage is 30 V with ±5 % tolerance (28.5–31.5 V range). Substituting it for a 24 V device would raise clamping threshold by ≥4.5 V, potentially exposing downstream circuitry to damaging overvoltage during transients.
How does the SOD523 package affect thermal performance compared to SOD323?
SOD523 has higher thermal resistance: Rth(j-sp) = 65 K/W vs. ~50 K/W for SOD323. This requires stricter attention to copper pour area at the cathode pad (≥35 mm² recommended) to maintain junction temperature below 150 °C under 300 mW dissipation.
Is BZX585-C30,115 suitable for automotive applications?
No - this device is not AEC-Q200 qualified. Nexperia explicitly states non-automotive qualification in legal disclaimers, and the datasheet lacks automotive-specific stress testing, PPAP documentation, or extended temperature validation beyond −65 °C to +150 °C ambient.
BZX585-C30,115 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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-C30,115 FAQ
1.How can I place an order for BZX585-C30,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C30,115 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-C30,115 reliable?
The price and inventory of BZX585-C30,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C30,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C30,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C30,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C30,115?
BZX585-C30,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C30,115 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-C30,115?
For technical support, including BZX585-C30,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C30,115 requirements.
6.How does Aetrix verify that BZX585-C30,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C30,115 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-C30,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C30,115?
All BZX585-C30,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C30,115, 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-C30,115 part is unused and in its original packaging.
Return procedure for BZX585-C30,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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