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Nexperia USA Inc. BZX585-B24,115
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- Part No.:
- BZX585-B24,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B24,115.pdf
- Description:
- DIODE ZENER 24V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
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Product details
Overview
BZX585-B24,115 from Nexperia is a 24 V ±2 % tolerance Zener 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 regulation in low-power analog and digital supply rails.
For engineers reviewing the BZX585-B24,115 datasheet, BZX585-B24,115 pinout, BZX585-B24,115 application, or BZX585-B24,115 equivalent, this device serves as a compact, low-capacitance (≤55 pF), low-differential-resistance (≤250 Ω at IZ = 5 mA) voltage reference for space-constrained DC-DC feedback loops, overvoltage clamping, and bias stabilization.
Technical Context
This Zener diode operates in reverse breakdown with a nominal Zener voltage of 24 V at 5 mA test current, exhibiting a temperature coefficient of +18.4 to +22.0 mV/K across its operating range. Its low thermal resistance (Rth(j-sp) = 65 K/W) enables stable regulation under transient surge conditions up to 100 µs.
The device features ultra-small SOD523 packaging with cathode-marked anisotropic leadframe geometry, supporting reflow soldering per JEDEC J-STD-020, and delivers <0.05 µA reverse leakage at 19.2 V (0.8 × VZ) - critical for battery-powered sensor node reference stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.5–24.5 V at IZ = 5 mA; ensures tight output regulation in 24 V rail monitoring circuits |
| Tolerance | ±2 %; supports high-accuracy feedback in precision LDO and switching regulator applications |
| Differential Resistance (rdiff) | ≤250 Ω at IZ = 5 mA; minimizes output voltage shift under load variation |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper; defines continuous thermal budget |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs; enables robust ESD/transient suppression without derating |
| Reverse Capacitance (Cd) | ≤55 pF at f = 1 MHz, VR = 0 V; preserves signal integrity in high-frequency bias networks |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA; confirms low-loss forward conduction during polarity protection use |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.25 mm × 0.85 mm footprint, 0.65 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | ≤250 Ω at 5 mA enables <10 mV output shift across ±1 mA load change in feedback paths |
| Ultra-compact SOD523 package | 0.001 in³ volume allows placement adjacent to IC pins in dense MCU/PMIC layouts |
| Low reverse capacitance | ≤55 pF avoids phase margin degradation in high-speed op-amp reference buffers |
| Controlled temperature coefficient | +18.4 to +22.0 mV/K permits predictable drift compensation in industrial temperature ranges |
| High surge robustness | 40 W non-repetitive peak power withstands IEC 61000-4-5 Level 3 surges without parameter shift |
Applications
| Power Supply Feedback | Sensor Bias Reference |
|---|---|
|
Use Scenario: Stabilizing output voltage of isolated flyback converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 24 V threshold to TL431 shunt regulator input. Use Value: ±2 % tolerance and ≤250 Ω rdiff ensure <±0.5 % output regulation accuracy across line/load/temperature. |
Use Scenario: Providing stable bias voltage to MEMS pressure sensor bridge amplifier. IC Role / Device Role / Timing Role: Low-noise, low-capacitance reference source for ratiometric ADC excitation. Use Value: ≤55 pF capacitance prevents high-frequency coupling into sensitive analog front-end; <0.05 µA leakage preserves battery life in IoT nodes. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
|
Use Scenario: Protecting 24 V CAN transceiver inputs from load dump transients. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage to 24.5 V before TVS activation. Use Value: 40 W non-repetitive surge rating absorbs 100 µs spikes without degradation; SOD523 footprint fits near connector pads. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontroller during brown-out. IC Role / Device Role / Timing Role: Precision threshold detector feeding RC delay network to reset pin. Use Value: Tight 23.5–24.5 V window ensures deterministic reset assertion at 23.8 V, independent of supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C24,115 | ±5 % tolerance (22.8–25.2 V), higher rdiff (≤250 Ω at IZ = 1 mA) | Acceptable where cost sensitivity outweighs regulation accuracy; less suitable for closed-loop feedback | Select when budget constraints dominate and ±5 % output tolerance is acceptable |
| MMSZ5249B-7-F | 24 V ±5 %, SOD-123 package (2.7 × 1.4 mm), Ptot = 500 mW, rdiff = 35 Ω | Larger footprint but lower dynamic impedance; better for high-current reference buffering | Choose when lower rdiff and higher power margin are required, and board space permits larger package |
Compared with BZX585-B24,115, the C24 variant trades regulation precision for cost, while MMSZ5249B offers superior dynamic performance at the expense of size and thermal profile - making the BZX585-B24,115 optimal for miniaturized, accuracy-critical 24 V reference designs.
Availability
BZX585-B24,115 is available at Aetrix Electronics and suitable for power supply feedback, sensor bias reference, overvoltage clamp, and microcontroller reset circuits requiring stable component supply with guaranteed long-term manufacturability.
Supply support for BZX585-B24,115 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 optimized for efficiency and miniaturization in consumer, industrial, and automotive applications.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and clamping in portable, IoT, and industrial control systems where SOD523 footprint and ±2 % accuracy are essential.
FAQ
What is the maximum steady-state power dissipation for BZX585-B24,115?
The BZX585-B24,115 has a total power dissipation limit of 300 mW at ambient temperature of 25 °C on an FR4 PCB with ~35 mm² copper area at the cathode tab. Derating is required above 25 °C per the Rth(j-a) = 350 K/W thermal resistance specification.
How is the cathode identified on the SOD523 package?
The cathode is marked by a visible bar on the top surface of the SOD523 package, aligned with Pin 1 per the official Nexperia package outline drawing (sod523_po). This matches the "K" designation in Table 2 and the graphic symbol showing Pin 1 as cathode.
Does BZX585-B24,115 meet RoHS and REACH requirements?
Yes - BZX585-B24,115 is manufactured by Nexperia in compliance with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full material declarations available through Nexperia's product environmental compliance portal.
Can BZX585-B24,115 be used in place of a 24 V Zener in a linear regulator error amplifier?
Yes - its ±2 % tolerance, low differential resistance (≤250 Ω), and stable temperature coefficient (+18.4 to +22.0 mV/K) make it suitable for precision error amplification in linear regulators, provided the operating current remains within 1–10 mA to maintain regulation accuracy and avoid thermal drift.
BZX585-B24,115 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):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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-B24,115 FAQ
1.How can I place an order for BZX585-B24,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B24,115 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-B24,115 reliable?
The price and inventory of BZX585-B24,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B24,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B24,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B24,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B24,115?
BZX585-B24,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B24,115 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-B24,115?
For technical support, including BZX585-B24,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B24,115 requirements.
6.How does Aetrix verify that BZX585-B24,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B24,115 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-B24,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B24,115?
All BZX585-B24,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B24,115, 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-B24,115 part is unused and in its original packaging.
Return procedure for BZX585-B24,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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