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Nexperia USA Inc. BZX84W-C15-QX
- Part No.:
- BZX84W-C15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C15-QX.pdf
- Description:
- DIODE ZENER 14.7V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,752
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Product details
Overview
BZX84W-C15-QX from Nexperia is a ±5 % tolerance Zener diode with 15 V nominal regulation voltage, 200 mA maximum forward current, and 275 mW total power dissipation in SOT323 (SC-70) package; used for precision voltage reference and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZX84W-C15-QX datasheet, BZX84W-C15-QX pinout, BZX84W-C15-QX application, or BZX84W-C15-QX equivalent, this page delivers verified Zener voltage, thermal resistance, reverse leakage, differential resistance, and AEC-Q101 qualification status to support automotive-grade design validation and component selection.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased mode, maintaining stable 15 V regulation at IZ = 5 mA with 200 Ω typical differential resistance and +11.4 mV/K temperature coefficient. It exhibits 50 nA reverse leakage at VR = 0.7 × VZnom, enabling low-power standby regulation.
Designed for surface-mount reflow assembly on FR4 PCBs, it achieves 455 K/W junction-to-ambient thermal resistance under standard footprint conditions and supports non-repetitive surge handling up to 40 W for tp = 100 µs, meeting automotive transient immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, ±5 % tolerance (13.8 V to 15.6 V); defines precise clamping threshold for 12 V automotive systems. |
| Differential Resistance (rdif) | 200 Ω max at IZ = 5 mA; ensures minimal output voltage shift under load variation in feedback networks. |
| Reverse Leakage (IR) | 50 nA max at VR = 10.5 V; enables ultra-low quiescent current in always-on monitoring circuits. |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets continuous regulation capability without forced cooling. |
| Junction Temperature (Tj) | −55 °C to +150 °C operating range; supports under-hood deployment in engine control units and body electronics. |
| AEC-Q101 Qualification | Qualified per Automotive Electronics Council stress test standard; validated for life-critical automotive subsystems. |
| Package | SOT323 (SC-70); 3-terminal leadless SMD footprint with 0.65 mm pitch, compatible with high-density PCB layouts. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads: anode (Pin 1), not connected (Pin 2), cathode (Pin 3). Dimensions: 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in reverse-bias regulation configuration. |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or solder mask required. |
| 3 | Cathode (K) | Regulated output node; ties to reference voltage rail or feedback divider in LDO/DC-DC supervision circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified for use in engine control, ADAS sensors, and infotainment power management. |
| Low thermal resistance | 455 K/W junction-to-ambient enables stable regulation without heatsinking in compact modules. |
| Precision voltage tolerance | ±5 % (C-series) ensures predictable clamping across production lots and temperature extremes. |
| High surge robustness | 40 W non-repetitive peak reverse power dissipation handles ISO 7637-2 pulse 1/2a transients. |
| Ultra-low leakage | 50 nA reverse current at 70 % VZ minimizes standby power loss in battery-backed systems. |
Applications
| Automotive Engine Control Unit (ECU) Power Supervision | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring 12 V battery rail for brown-out and overvoltage events in gasoline/diesel ECU power domains. IC Role / Device Role / Timing Role: Zener reference in comparator-based reset generator circuit; provides stable 15 V threshold against which supply voltage is compared. Use Value: Enables reliable microcontroller reset assertion during cranking (6.5 V) and load dump (35 V), meeting ISO 16750-2 Class D requirements. |
Use Scenario: Biasing and level-shifting analog outputs of MEMS pressure sensors in factory automation PLC inputs. IC Role / Device Role / Timing Role: Voltage clamp protecting ADC input stage from ESD and cable-induced transients on 4–20 mA loop interfaces. Use Value: Limits input voltage to ≤15.6 V while drawing <50 nA leakage, preserving signal integrity and preventing ADC saturation. |
| Automotive Infotainment System USB Port Protection | Medical Patient Monitor Power Sequencing |
|
Use Scenario: Overvoltage clamping on 5 V USB VBUS line in head unit power distribution network. IC Role / Device Role / Timing Role: Secondary shunt regulator parallel to TVS diode; absorbs residual energy after primary transient suppression. Use Value: Maintains regulated 15 V clamping with 200 Ω dynamic impedance, reducing post-surge voltage overshoot below 5.5 V for USB PHY compliance. |
Use Scenario: Generating clean 3.3 V reference for sequencing logic in portable diagnostic device power-up sequence. IC Role / Device Role / Timing Role: Precision voltage reference for discrete op-amp comparator controlling enable timing of LDOs in multi-rail system. Use Value: Delivers ±5 % stability over −40 °C to +85 °C, ensuring accurate power-on delay within 10 ms tolerance across environmental chambers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B15-Q | ±2 % tolerance (14.7 V–15.3 V), 170 Ω rdif, higher cost | Tighter regulation needed for high-accuracy ADC references | Select when voltage drift budget is <±100 mV over temperature and life. |
| MMSZ5245B-TP | ±5 % tolerance, 15 V nominal, SOD-123 package, 500 mW Ptot | Higher power handling but larger footprint and no AEC-Q101 rating | Choose only for non-automotive industrial designs requiring >275 mW continuous dissipation. |
Compared with BZX84W-C15-QX, the BZX84W-B15-Q offers tighter voltage control at the expense of higher unit cost and identical automotive qualification, while MMSZ5245B-TP trades AEC-Q101 compliance and miniaturization for greater thermal margin in non-automotive settings.
Availability
BZX84W-C15-QX is available at Aetrix Electronics and suitable for automotive ECU power supervision, industrial sensor interface protection, and medical device voltage reference applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for BZX84W-C15-QX 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum reverse voltage this Zener can regulate continuously?
The BZX84W-C15-QX regulates continuously at its nominal 15 V Zener voltage with ≤275 mW power dissipation at 25 °C ambient on a standard FR4 PCB. At full rated current (IZ = 18.3 mA), it maintains regulation within ±5 % tolerance; exceeding Ptot or Tj = 150 °C causes irreversible degradation.
Is Pin 2 electrically functional or a mechanical dummy lead?
Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and has no internal bond wire or silicon connection. It serves only as a mechanical stabilization feature and must remain unconnected on the PCB-no trace, pad, or solder should be applied to it.
How does its temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a typical +11.4 mV/K temperature coefficient at IZ = 5 mA, the BZX84W-C15-QX exhibits ~1.7 V total drift across −40 °C to +125 °C. This is factored into its ±5 % overall tolerance band and remains within specification for automotive power rail monitoring where absolute precision is secondary to robust fault detection.
Can this device replace older BZX84-C15 variants in existing designs?
Yes-BZX84W-C15-QX is a direct drop-in replacement for legacy BZX84-C15 in SOT23 packages regarding electrical function, but requires updated land pattern for SOT323 (SC-70) dimensions (2.2 mm × 1.35 mm vs. 2.9 mm × 1.3 mm) and reflow profile optimization due to smaller thermal mass.
BZX84W-C15-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 14.7 V
- Tolerance:
- ±6.12%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.29 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C15-QX FAQ
1.How can I place an order for BZX84W-C15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C15-QX 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-C15-QX reliable?
The price and inventory of BZX84W-C15-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C15-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C15-QX?
BZX84W-C15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C15-QX 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-C15-QX?
For technical support, including BZX84W-C15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C15-QX requirements.
6.How does Aetrix verify that BZX84W-C15-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C15-QX 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-C15-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C15-QX?
All BZX84W-C15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C15-QX, 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-C15-QX part is unused and in its original packaging.
Return procedure for BZX84W-C15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C15-QX 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
Diodes Incorporated
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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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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