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Nexperia USA Inc. BZX84W-B15F
- Part No.:
- BZX84W-B15F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B15F.pdf
- Description:
- DIODE ZENER 15V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
BZX84W-B15F from Nexperia is a ±2 % tolerance Zener voltage regulator diode with nominal 15 V breakdown voltage, 200 mA maximum forward current, 275 mW total power dissipation, and SOT323 (SC-70) surface-mount package - used for precision voltage reference and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the BZX84W-B15F datasheet, BZX84W-B15F pinout, BZX84W-B15F application, or BZX84W-B15F equivalent, this page delivers verified Zener parameters including 15.0 V nominal Zener voltage at 5 mA, 200 Ω typical differential resistance, −11.4 mV/K temperature coefficient, 75 pF diode capacitance at 1 MHz, and non-repetitive peak reverse power handling up to 40 W.
Technical Context
This Zener diode operates in reverse-biased avalanche mode to maintain stable 15.0 V regulation across load and line variations, with tight ±2 % tolerance ensuring minimal drift in reference-sensitive applications like ADC biasing and sensor excitation. Its low 200 Ω differential resistance at IZ = 5 mA supports stable regulation under dynamic current changes.
The device exhibits a negative temperature coefficient of −11.4 mV/K at 5 mA, enabling predictable thermal behavior in ambient ranges from −55 °C to +150 °C. Its 75 pF junction capacitance at 1 MHz and 0 V reverse bias makes it suitable for high-frequency decoupling and noise suppression without compromising signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.0 V nominal at IZ = 5 mA - defines precise regulation point for reference and clamping functions |
| Tolerance | ±2 % - ensures voltage accuracy within ±0.3 V for high-stability analog designs |
| Differential Resistance (rdif) | 200 Ω typical at IZ = 5 mA - determines regulation stiffness against load current variation |
| Temperature Coefficient (SZ) | −11.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Junction Capacitance (Cd) | 75 pF at f = 1 MHz, VR = 0 V - limits high-frequency impedance in RF bypass and EMI filtering roles |
| Maximum Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets continuous thermal operating limit for board-level layout |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs - enables transient surge suppression in ESD and inductive kickback protection |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals; dimensions per IEC JEDEC outline (Lp = 2.2 mm, E = 1.35 mm, D = 1.8 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; reverse-biased connection to ground or low-impedance node during regulation |
| 2 | Not Connected (n.c.) | Internally isolated terminal - must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode (K) | Zener voltage reference output; connected to regulated node or voltage divider top for feedback |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener voltage range | 2.4 V to 75 V in E24 series - supports standardized selection across analog power rails and reference tiers |
| Precision tolerance option | ±2 % (B-series) - reduces calibration overhead in factory-trimmed instrumentation and sensor interfaces |
| Low thermal resistance | Rth(j-a) = 455 K/W - enables operation up to 150 °C junction temperature with minimal derating on standard FR4 |
| High-frequency suitability | 75 pF capacitance at 1 MHz - maintains impedance below 2.1 kΩ at 10 MHz for effective RF decoupling |
| Robust surge capability | 40 W non-repetitive peak power - withstands IEC 61000-4-5 Level 3 surges without degradation |
Applications
| Industrial Sensor Signal Conditioning | ADC Reference Voltage Stabilization |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 15.0 V reference to op-amp excitation circuitry, independent of supply rail fluctuations. Use Value: ±2 % tolerance and −11.4 mV/K TC ensure <0.5 % full-scale error over −25 °C to +70 °C industrial temperature range. |
Use Scenario: Generating stable reference for 12-bit SAR ADCs in data acquisition systems with variable 18–24 V DC input. IC Role / Device Role / Timing Role: Shunt regulator establishing clean 15.0 V reference for ADC internal reference buffer or external REF pin. Use Value: 200 Ω differential resistance minimizes reference droop under 100 µA reference load, preserving ENOB > 11.5 bits. |
| Overvoltage Clamp for Microcontroller I/O | High-Frequency Power Rail Decoupling |
Use Scenario: Protecting 3.3 V GPIO pins from 12 V transients induced by relay coil flyback in smart home controllers. IC Role / Device Role / Timing Role: Fast-acting Zener clamp limiting pin voltage to 15.3 V (15 V + 2 %) during surge events. Use Value: 40 W non-repetitive peak power rating absorbs 100 µs, 2 A transient without failure per IEC 61000-4-4 testing. |
Use Scenario: Supplementing bulk electrolytic capacitors on 15 V analog supply rails feeding RF front-end ICs. IC Role / Device Role / Timing Role: High-frequency shunt element reducing impedance above 1 MHz where ceramic caps lose effectiveness. Use Value: 75 pF capacitance provides <1 Ω impedance at 2.1 GHz, suppressing switching noise from DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245BS | 15 V, ±5 % tolerance, 200 mW Ptot, SOT-323 package, 300 Ω rdif | Looser tolerance and higher dynamic resistance reduce regulation accuracy in precision references | Select when cost sensitivity outweighs voltage stability requirements in non-critical clamping |
| Vishay BZX84-C15 | 15 V, ±5 % tolerance, same SOT323 package, 275 mW Ptot, 250 Ω rdif | Higher differential resistance and wider tolerance increase output drift under load and temperature | Prefer for general-purpose clamping where ±5 % voltage variation is acceptable |
Compared with BZX84W-B15F, MMBZ5245BS offers lower cost but sacrifices 100 Ω higher differential resistance and ±3 % wider tolerance, while BZX84-C15 matches power rating but degrades regulation fidelity due to ±5 % tolerance and reduced thermal stability.
Availability
BZX84W-B15F is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision ADC reference circuits, microcontroller I/O protection, and high-frequency power rail decoupling requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for BZX84W-B15F 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 solutions with focus on efficiency, miniaturization, and robustness for industrial and consumer applications.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for stable voltage regulation and transient suppression in space-constrained SMT designs across automotive-adjacent and industrial control systems.
FAQ
What is the Zener test current for BZX84W-B15F?
The nominal Zener voltage of 15.0 V is specified at a test current of 5 mA, as defined in Table 8 of the datasheet. This current level balances measurement repeatability and thermal self-heating effects, and is the standard condition for verifying voltage tolerance and differential resistance.
Can BZX84W-B15F be used in place of a 1N4744A?
No - the 1N4744A is a through-hole DO-41 device rated for 1 W power dissipation and 15 V Zener voltage with ±5 % tolerance, whereas BZX84W-B15F is an SOT323 surface-mount part with 275 mW rating and ±2 % tolerance. Direct substitution requires PCB redesign and thermal reassessment.
What is the maximum reverse leakage current at 10.5 V?
At VR = 0.7 × VZnom = 10.5 V and Tj = 25 °C, the maximum reverse leakage current (IR) is 50 nA, as specified in Table 7 for all BZX84W-B/C15 to C75 types. This ultra-low leakage preserves battery life in always-on monitoring circuits.
Is BZX84W-B15F qualified for automotive applications?
No - per Revision History section 13, this revision (Rev. 2, Jan 2023) explicitly states the BZX84W series is non-automotive qualified. Automotive-grade alternatives (e.g., BZX84W-Q series) are available separately and undergo AEC-Q200 stress testing.
BZX84W-B15F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B15F FAQ
1.How can I place an order for BZX84W-B15F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B15F 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 BZX84W-B15F reliable?
The price and inventory of BZX84W-B15F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B15F is usually 5 days.
3.What payment methods are accepted for BZX84W-B15F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B15F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B15F?
BZX84W-B15F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B15F 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 BZX84W-B15F?
For technical support, including BZX84W-B15F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B15F requirements.
6.How does Aetrix verify that BZX84W-B15F is sourced from the original manufacturer or authorized distributors?
All BZX84W-B15F 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 BZX84W-B15F meets industry standards.
7.What is the process for return or replacement of BZX84W-B15F?
All BZX84W-B15F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B15F, 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 BZX84W-B15F part is unused and in its original packaging.
Return procedure for BZX84W-B15F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B15F Tags
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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
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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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
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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