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Taiwan Semiconductor Corporation BZX585B4V3 RSG
- Part No.:
- BZX585B4V3 RSG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585B4V3 RSG.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD523F
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
BZX585B4V3 RSG from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 4.3 V ±2%, 200 mW power dissipation, 90 Ω maximum zener impedance at 5 mA test current, and SOD-523F package. It provides precision voltage regulation in low-power signal conditioning and reference circuits.
For engineers reviewing the BZX585B4V3 RSG datasheet, BZX585B4V3 RSG pinout, BZX585B4V3 RSG application, or BZX585B4V3 RSG equivalent, key selection criteria include zener tolerance (±2%), thermal resistance (680 °C/W), MSL 1 rating, halogen-free construction, and guaranteed 260 °C/10 s soldering compatibility.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable voltage across its terminals under controlled current. Its 4.3 V nominal zener voltage is specified at 5 mA test current (IZT), with dynamic impedance of ≤90 Ω and temperature coefficient of −3.5 mV/°C.
The SOD-523F package enables high-density PCB layouts while supporting full thermal performance up to 150 °C junction temperature. With 1.36 mg mass and MSL 1 rating, it requires no bake-out prior to reflow and withstands standard lead-free assembly profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal, 4.21–4.39 V range at 5 mA - ensures tight regulation for 3.3 V/5 V rail monitoring |
| Power Dissipation (PD) | 200 mW - supports continuous operation in low-current bias networks without heatsinking |
| Zener Impedance (ZZT) | ≤90 Ω at IZT = 5 mA - minimizes output voltage variation under load transients |
| Reverse Current (IR) | ≤1 μA at VR = 1 V - guarantees low leakage in high-impedance sensing nodes |
| Thermal Resistance (RθJA) | 680 °C/W - defines junction-to-ambient rise under 200 mW dissipation in still air |
| Temperature Coefficient (Tc) | −3.5 mV/°C - enables predictable drift compensation in temperature-stable references |
| Moisture Sensitivity Level | MSL 1 - allows unlimited floor life and direct placement into reflow without preconditioning |
Pinout & Package
Package: SOD-523F - ultra-small plastic surface-mount case (0.70–0.90 mm length, 1.50–1.70 mm width, 0.25–0.40 mm height), green compound, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode (K) | Reverse breakdown terminal | Connected to higher-potential node; voltage referenced to this terminal during zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% zener voltage tolerance | Enables accurate voltage clamping and reference generation without post-calibration |
| Guaranteed 260 °C/10 s soldering | Ensures robustness during standard Pb-free reflow without parametric shift or delamination |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance requirements for consumer, industrial, and automotive end equipment |
| Low 1.36 mg mass | Reduces mechanical stress on fine-pitch solder joints and improves board-level reliability |
| Pb-free and RoHS compliant | Supports global regulatory compliance and eliminates hazardous substance handling concerns |
Applications
| Power Supply Monitoring | Overvoltage Protection |
|---|---|
Use Scenario: Monitoring 5 V supply rail integrity in microcontroller-based sensor nodes. IC Role / Device Role / Timing Role: Zener reference element in comparator input network for undervoltage/overvoltage detection. Use Value: Tight 4.3 V ±2% threshold enables reliable trip point at 4.21–4.39 V, minimizing false triggers. | Use Scenario: Clamping transient spikes on low-voltage I/O lines in USB peripherals. IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to safe levels during ESD or coupling events. Use Value: 200 mW rating and 90 Ω impedance ensure fast response and minimal overshoot below 5 V. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Providing stable bias voltage for op-amp input stages in analog front-ends. IC Role / Device Role / Timing Role: Precision DC reference generator replacing larger three-terminal regulators in space-constrained designs. Use Value: −3.5 mV/°C tempco and MSL 1 packaging support stable operation across −40 to +85 °C ambient. | Use Scenario: Level-shifting logic signals between 3.3 V and 5 V domains in mixed-voltage systems. IC Role / Device Role / Timing Role: Passive clamp defining upper voltage limit for bidirectional level translation circuits. Use Value: Low 1 μA IR at 1 V ensures negligible loading on high-impedance source nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BS-7-F | Zener voltage 3.6 V, ±5% tolerance, SOD-323 package, 200 mW rating | Lower voltage and wider tolerance; larger footprint than SOD-523F | Select when 3.6 V reference is required and board space permits SOD-323 |
| BZX384-B4V3,115 | Zener voltage 4.3 V, ±2% tolerance, SOD-323 package, 250 mW rating | Higher power rating but same voltage accuracy; not MSL 1 rated | Prefer for higher-power derating margin where MSL 1 is not mandatory |
Compared with MMBZ5225BS-7-F and BZX384-B4V3,115, the BZX585B4V3 RSG offers superior board-area efficiency via SOD-523F, guaranteed MSL 1 handling, and identical ±2% tolerance at 4.3 V - making it optimal for miniaturized, high-reliability consumer and industrial PCBs.
Availability
BZX585B4V3 RSG is available at Aetrix Electronics and suitable for power supply monitoring, overvoltage protection, and reference voltage source applications requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for BZX585B4V3 RSG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete devices, analog ICs, and power management solutions for industrial, computing, and consumer markets.
The BZX585B4V3 RSG belongs to TSC's Small Signal Product line, engineered for high-accuracy, low-power voltage regulation in space-constrained, thermally demanding applications.
FAQ
What is the exact zener voltage tolerance of BZX585B4V3 RSG?
The BZX585B4V3 RSG has a zener voltage tolerance of ±2% at 5 mA test current, meaning its actual breakdown voltage falls within 4.21 V to 4.39 V under standard conditions. This tolerance is confirmed in the Electrical Characteristics table of the official Taiwan Semiconductor datasheet revision C1607. The BZX585B4V3 RSG maintains this specification across its qualified operating temperature range.
Is BZX585B4V3 RSG compatible with lead-free reflow soldering processes?
Yes, the BZX585B4V3 RSG is fully compatible with lead-free reflow soldering, with guaranteed process survivability at 260 °C for 10 seconds. Its SOD-523F package and internal construction meet JEDEC J-STD-020 requirements for MSL 1 devices. The BZX585B4V3 RSG does not require pre-baking and can be placed directly onto PCBs prior to standard Pb-free reflow profiles.
What is the maximum reverse leakage current for BZX585B4V3 RSG at 1 V?
The maximum reverse leakage current (IR) for BZX585B4V3 RSG is 1 μA when reverse biased at 1 V and measured at 25 °C. This value is specified in the Electrical Characteristics table and reflects the device's suitability for high-impedance reference and sensing applications. The BZX585B4V3 RSG maintains low leakage across its storage temperature range of −65 °C to +150 °C.
Does BZX585B4V3 RSG have halogen-free and RoHS compliance documentation?
Yes, the BZX585B4V3 RSG is certified halogen-free per IEC 61249-2-21 and RoHS compliant per Directive 2011/65/EU. These certifications are explicitly stated in the product summary and mechanical data sections of the Taiwan Semiconductor datasheet (revision C1607). The BZX585B4V3 RSG uses green compound and Pb-free terminations throughout its construction.
What is the thermal resistance (RθJA) of BZX585B4V3 RSG in still air?
The junction-to-ambient thermal resistance (RθJA) of BZX585B4V3 RSG is 680 °C/W under standard test conditions (JEDEC JESD51-2, still air). This value is used to calculate junction temperature rise above ambient during operation. For the BZX585B4V3 RSG, dissipating its full 200 mW rating in still air results in a theoretical ΔT of 136 °C - confirming why derating curves specify reduced power above 75 °C ambient.
BZX585B4V3 RSG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 2.7 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523F
BZX585B4V3 RSG FAQ
1.How can I place an order for BZX585B4V3 RSG through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585B4V3 RSG 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 BZX585B4V3 RSG reliable?
The price and inventory of BZX585B4V3 RSG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585B4V3 RSG is usually 5 days.
3.What payment methods are accepted for BZX585B4V3 RSG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585B4V3 RSG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585B4V3 RSG?
BZX585B4V3 RSG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585B4V3 RSG 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 BZX585B4V3 RSG?
For technical support, including BZX585B4V3 RSG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585B4V3 RSG requirements.
6.How does Aetrix verify that BZX585B4V3 RSG is sourced from the original manufacturer or authorized distributors?
All BZX585B4V3 RSG 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 BZX585B4V3 RSG meets industry standards.
7.What is the process for return or replacement of BZX585B4V3 RSG?
All BZX585B4V3 RSG units undergo pre-shipment inspection (PSI). If there is an issue with BZX585B4V3 RSG, 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 BZX585B4V3 RSG part is unused and in its original packaging.
Return procedure for BZX585B4V3 RSG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585B4V3 RSG Tags
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