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Nexperia USA Inc. BZX585-C75,115
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- Part No.:
- BZX585-C75,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C75,115.pdf
- Description:
- DIODE ZENER 75V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
BZX585-C75,115 from Nexperia is a 75 V ±5 % 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 space-constrained low-power circuits such as sensor biasing and reference voltage generation.
For engineers reviewing the BZX585-C75,115 datasheet, BZX585-C75,115 pinout, BZX585-C75,115 application, or BZX585-C75,115 equivalent, key selection criteria include nominal Zener voltage (75 V), tolerance (±5 %), differential resistance (170 Ω at IZ = 2 mA), thermal resistance (65 K/W junction-to-solder point), and ultra-small SOD523 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its 75 V nominal Zener voltage is specified at IZ = 2 mA, with temperature coefficient of +80.2 mV/K and reverse current ≤0.05 µA at VR = 57 V.
Designed for surface-mount use in FR4 PCBs with ~35 mm² copper area at cathode, it delivers low thermal resistance (Rth(j-sp) = 65 K/W) and supports surge handling up to 40 W for 100 µs square-wave pulses at Tj = 25 °C prior to surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal at IZ = 2 mA; actual range 71.25 V to 78.75 V per ±5 % tolerance |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² Cu at cathode - defines continuous DC operating limit |
| Differential Resistance (rdiff) | 170 Ω max at IZ = 2 mA - determines regulation stiffness and output impedance in shunt regulator designs |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient overvoltage clamping without failure |
| Reverse Current (IR) | ≤0.05 µA at VR = 57 V - ensures minimal leakage in high-impedance bias networks |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - relevant for polarity-check or ESD protection configurations |
| Thermal Resistance (Rth(j-sp)) | 65 K/W junction-to-solder point - enables accurate thermal modeling when mounted on standard SMT pads |
Pinout & Package
Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), marked with cathode band on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.3 mm² board area - critical for wearables, hearing aids, and miniaturized IoT sensors |
| ±5 % Zener voltage tolerance | Supports cost-sensitive applications where tight regulation is secondary to size and reliability |
| Low differential resistance (170 Ω) | Minimizes output voltage drift under load variation - improves stability in feedback references |
| High surge capability (40 W, 100 µs) | Clamps ESD and fast transients without degradation - eliminates need for external TVS in many Class 2 designs |
| Low leakage (0.05 µA @ 57 V) | Preserves battery life in always-on monitoring circuits by limiting standby current draw |
Applications
| Industrial Sensor Biasing | Portable Device Reference |
|---|---|
Use Scenario: Providing stable bias voltage to MEMS pressure sensor ICs in battery-powered condition monitoring nodes. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining 75 V compliance for high-side sensing amplifier rails. Use Value: Low leakage (0.05 µA) extends 10-year battery life; SOD523 footprint fits within 2.0 mm × 1.5 mm sensor module PCB real estate. |
Use Scenario: Generating precise reference voltage for ADC input scaling in handheld multimeters. IC Role / Device Role / Timing Role: Zener-regulated reference source for 16-bit SAR ADC front-end, operating at 2 mA quiescent current. Use Value: 170 Ω differential resistance ensures <0.1 % full-scale error across 0–2 mA load variation; ±5 % tolerance meets Class II accuracy requirements. |
| LED Driver Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Clamping transient overvoltage on constant-current LED driver outputs during hot-plug events. IC Role / Device Role / Timing Role: Surge-absorbing Zener clamp placed across LED string anode and ground. Use Value: 40 W non-repetitive peak power rating handles 100 µs surges up to ±100 V without parametric shift - replaces larger DO-214AC devices. |
Use Scenario: Supplying clean reset threshold voltage to microcontroller POR (power-on reset) circuitry in automotive body control modules. IC Role / Device Role / Timing Role: Precision Zener element setting 75 V trigger level for discrete reset supervisor comparator. Use Value: +80.2 mV/K temperature coefficient allows predictable thermal drift compensation; SOD523 reflow compatibility ensures robust assembly in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B75,115 | Same package and 75 V nominal voltage but ±2 % tolerance (vs. ±5 %); higher test current (5 mA vs. 2 mA) | Used where tighter regulation stability is required, e.g., metrology-grade references | Select when absolute voltage accuracy outweighs cost sensitivity and leakage budget |
| MMSZ5267ET1G | SOD-123 package (2.7 mm × 1.4 mm), 75 V ±5 %, 500 mW Ptot, 200 Ω rdiff at 20 mA | Larger footprint and higher power rating - suited for higher-current regulation or less space-constrained boards | Choose when thermal margin >300 mW is needed or legacy SOD-123 layout reuse is prioritized |
Compared with BZX585-B75,115, the C75 variant trades voltage precision for lower cost and reduced leakage; versus MMSZ5267ET1G, it sacrifices power handling and thermal mass for 55 % smaller board area and better high-frequency decoupling due to lower capacitance (0.05 pF).
Availability
BZX585-C75,115 is available at Aetrix Electronics and suitable for industrial sensor biasing, portable device reference design, LED driver overvoltage clamping, and microcontroller reset circuit implementation requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX585-C75,115 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 focused on high-volume, high-reliability essential semiconductors for automotive, industrial, and consumer markets, with leadership in logic, discretes, and MOSFETs.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, low-power voltage regulation and transient suppression in space-constrained SMT applications.
FAQ
What is the maximum continuous reverse current for BZX585-C75,115 at 75 V?
The device is not rated for continuous operation at 75 V in reverse bias. Its maximum continuous reverse current is defined by power dissipation: at 75 V, Imax = Ptot / VZ = 300 mW / 75 V = 4 mA. Exceeding this risks thermal runaway due to junction temperature exceeding 150 °C.
Can BZX585-C75,115 be used in place of a 75 V Zener with ±2 % tolerance?
No - BZX585-C75,115 has ±5 % tolerance (71.25 V to 78.75 V), while ±2 % variants like BZX585-B75,115 span 73.5 V to 76.5 V. Substitution requires verifying system-level voltage margin, especially in precision references where 3.5 V window difference affects accuracy.
How does the SOD523 package affect thermal performance compared to SOD-123?
SOD523 offers lower Rth(j-sp) = 65 K/W versus ~120 K/W for SOD-123, enabling faster heat transfer to solder joint, but its smaller copper pad area limits absolute power handling. At 300 mW, SOD523 reaches ~20 K above ambient - acceptable for intermittent loads but unsuitable for sustained 75 V/4 mA operation without derating.
Is BZX585-C75,115 suitable for automotive applications?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states non-automotive qualification unless declared in the data sheet. For automotive reset or biasing, use AEC-Q200-compliant alternatives such as PZM7.5A or BZX84-C75VL, which undergo extended temperature cycling and vibration testing.
BZX585-C75,115 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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-C75,115 FAQ
1.How can I place an order for BZX585-C75,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C75,115 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-C75,115 reliable?
The price and inventory of BZX585-C75,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C75,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C75,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C75,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C75,115?
BZX585-C75,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C75,115 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-C75,115?
For technical support, including BZX585-C75,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C75,115 requirements.
6.How does Aetrix verify that BZX585-C75,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C75,115 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-C75,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C75,115?
All BZX585-C75,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C75,115, 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-C75,115 part is unused and in its original packaging.
Return procedure for BZX585-C75,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C75,115 Tags
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