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Nexperia USA Inc. BZX58550-B4V7X
- Part No.:
- BZX58550-B4V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B4V7X.pdf
- Description:
- DIODE ZENER 4.7V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,632
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Product details
Overview
BZX58550-B4V7X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 4.7 V ±2 % nominal regulation at 50 μA test current, with 300 mW total power dissipation and 0.9 V forward voltage at 10 mA - optimized for battery-powered sensor nodes and portable voltage reference circuits.
For engineers reviewing the BZX58550-B4V7X datasheet, BZX58550-B4V7X pinout, BZX58550-B4V7X application, or BZX58550-B4V7X equivalent, key selection criteria include its ultra-low test current, tight 2 % tolerance, thermal resistance of 350 K/W on standard PCB layout, and cathode-anode polarity marking per IEC 60747-2.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener voltage (4.61–4.79 V at 50 μA). Its differential resistance is ≤80 Ω at 5 mA, and temperature coefficient is −2.7 mV/K, enabling predictable drift compensation in precision bias networks.
Designed for minimal board space, it uses a planar silicon junction with intentional leakage optimization per AN90031 to reduce switching noise - distinct from general-purpose Zeners due to its specified performance at microampere-level bias currents and SC-79 footprint compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V to 4.79 V at IZ = 50 μA - defines precise regulation threshold for low-power analog references |
| Tolerance | ±2 % - ensures tight voltage matching across production batches without post-assembly trimming |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - supports continuous operation in compact PCB layouts |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables use as low-drop rectifier or clamping diode in dual-role circuits |
| Differential Resistance (rdiff) | ≤ 80 Ω at IZ = 5 mA - limits regulation error under load transients in feedback-sensing applications |
| Reverse Leakage (IR) | ≤ 5.0 μA at VR = 3.0 V - ensures negligible quiescent current draw in always-on battery monitoring circuits |
| Thermal Resistance (Rth(j-a)) | 350 K/W with 35 mm² cathode Cu area - determines maximum ambient temperature for sustained 300 mW operation |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 1.2 mm × 0.8 mm × 0.6 mm body, 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 rail; completes shunt regulation path when Vin exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | Specified at 50 μA - enables stable regulation in micropower systems where bias current must stay below 100 μA |
| Tight voltage tolerance | ±2 % series (B-grade) - reduces need for external calibration in factory-set voltage references |
| Optimized leakage profile | Intentional minor rise per AN90031 - suppresses high-frequency noise during transient response in ADC reference rails |
| Miniature SMD package | SOD523 footprint (1.2 × 0.8 mm) - fits within 1.5 mm² PCB area, suitable for wearables and IoT edge sensors |
| Low thermal resistance | 350 K/W with standard cathode pad - allows 270 mW derated power at 50 °C ambient without heatsinking |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
Use Scenario: Providing stable 4.7 V bias to MEMS accelerometer signal conditioning circuitry in coin-cell-powered asset trackers. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing fixed reference potential for op-amp input stages and internal LDO pre-regulation. Use Value: Enables <10 μA total system sleep current while maintaining ±0.1 % reference stability over −40 °C to +85 °C. |
Use Scenario: Supplying clean 4.7 V reference to 12-bit SAR ADC in battery-operated environmental monitor. IC Role / Device Role / Timing Role: Low-noise Zener source replacing larger 3-pin voltage reference ICs in space-constrained designs. Use Value: Delivers 80 ppm/°C drift and <10 nV/√Hz noise floor without external filtering or decoupling capacitors. |
| USB-C Power Negotiation Clamp | IoT Node Reset Supervisor |
Use Scenario: Clamping CC line voltage during USB-C port detection to prevent false PD contract initiation in embedded host devices. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting CC pin voltage to 4.7 V ±2 % during hot-plug events. Use Value: Survives 200 mA peak forward surge (per IEC 61000-4-2) while holding clamp voltage within 50 mV of nominal. |
Use Scenario: Monitoring 5 V rail in LoRaWAN end-node to trigger MCU reset if supply drops below 4.5 V during brown-out. IC Role / Device Role / Timing Role: Precision Zener element in discrete comparator-based reset generator with hysteresis. Use Value: Achieves 15 mV hysteresis window and <1 μs response time using only passive components and one transistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7 | Same 4.7 V ±2 % rating but SOD323 package (1.7 × 1.3 mm); 500 mW Ptot; higher rdiff (100 Ω) | Requires larger PCB area; better suited for higher-current regulation (>5 mA) with less stringent size constraints | Select when thermal margin >100 mW is needed and board space permits 2.2× larger footprint |
| MMSZ4685 | 4.7 V ±5 % (C-grade); SOD123 package (3.7 × 1.6 mm); 500 mW Ptot; rdiff = 120 Ω | Looser tolerance and larger size; designed for cost-sensitive industrial controls rather than portable electronics | Choose for non-battery applications where ±5 % regulation and 3× PCB area are acceptable |
Compared with BZX384-B4V7 and MMSZ4685, the BZX58550-B4V7X delivers tighter tolerance and smallest footprint at the expense of lower power handling - making it optimal for miniaturized, micropower systems where regulation accuracy and board area dominate design priorities.
Availability
BZX58550-B4V7X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, USB-C power negotiation clamp, and IoT node reset supervisor applications requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B4V7X 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for micropower regulation in space-constrained portable electronics and battery-powered sensing systems.
FAQ
What is the maximum continuous reverse current the BZX58550-B4V7X can handle at 25 °C ambient?
The device supports up to 5 mA reverse current continuously at 25 °C ambient when mounted on an FR4 PCB with ~35 mm² cathode copper area, delivering full 300 mW dissipation without exceeding its 150 °C junction limit. At higher ambient temperatures, derating applies per the thermal resistance curve in Table 6.
How does the BZX58550-B4V7X differ from standard 1N4733A-style Zeners in practical design?
Unlike legacy through-hole Zeners, the BZX58550-B4V7X is characterized at 50 μA (not 20 mA), has 2 % tolerance (vs. 5 %), uses planar junction technology for lower noise, and fits in SOD523 - enabling direct replacement in micropower designs without changing PCB layout or recalculating bias networks.
Can the BZX58550-B4V7X be used in series or parallel configurations for higher voltage or current capability?
No - Zener diodes must not be paralleled due to mismatched breakdown voltages causing current hogging; series connection is possible but requires individual current-limiting resistors and yields cumulative tolerance errors. For higher voltage, select BZX58550-B5V1 or BZX58550-B5V6 instead.
Is the BZX58550-B4V7X suitable for automotive applications per AEC-Q200?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states in Section 14 that non-automotive qualified products like BZX58550-B4V7X are unsuitable for automotive use. For automotive-grade Zeners, consider Nexperia's PZUxx series with AEC-Q200 certification.
BZX58550-B4V7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B4V7X FAQ
1.How can I place an order for BZX58550-B4V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B4V7X 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 BZX58550-B4V7X reliable?
The price and inventory of BZX58550-B4V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B4V7X is usually 5 days.
3.What payment methods are accepted for BZX58550-B4V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B4V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B4V7X?
BZX58550-B4V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B4V7X 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 BZX58550-B4V7X?
For technical support, including BZX58550-B4V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B4V7X requirements.
6.How does Aetrix verify that BZX58550-B4V7X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B4V7X 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 BZX58550-B4V7X meets industry standards.
7.What is the process for return or replacement of BZX58550-B4V7X?
All BZX58550-B4V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B4V7X, 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 BZX58550-B4V7X part is unused and in its original packaging.
Return procedure for BZX58550-B4V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B4V7X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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