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Nexperia USA Inc. BZX84W-C27F
- Part No.:
- BZX84W-C27F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C27F.pdf
- Description:
- DIODE ZENER 27V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6
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Product details
Overview
BZX84W-C27F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with nominal 27 V breakdown voltage, 300 Ω differential resistance at IZ = 2 mA, 23.4 mV/K temperature coefficient, and 1.0 pF junction capacitance at 1 MHz; used for precision voltage reference and overvoltage clamping in low-power analog signal conditioning circuits.
For engineers reviewing the BZX84W-C27F datasheet, BZX84W-C27F pinout, BZX84W-C27F application, or BZX84W-C27F equivalent, this page delivers verified package mapping (SOT323), terminal roles (anode/cathode/not connected), thermal resistance (455 K/W), reverse leakage (50 nA at 0.7×VZnom), and direct substitution guidance against industry-standard Zener alternatives.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage across its terminals under varying load or supply conditions. Its 27 V nominal Zener voltage is specified at IZ = 2 mA with ±5 % tolerance, and exhibits a positive temperature coefficient of +23.4 mV/K - indicating voltage increases with junction temperature.
The device uses a planar epitaxial silicon process in a leadless SOT323 (SC-70) package with three terminals: anode (Pin 1), cathode (Pin 3), and a non-connected terminal (Pin 2). Thermal resistance from junction to ambient is 455 K/W on standard FR4 PCB, limiting continuous power dissipation to 275 mW at Tamb = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 27 V nominal at IZ = 2 mA; ±5 % tolerance ensures regulation within 25.1 V–28.9 V in production units |
| Differential Resistance rdif | 300 Ω max at IZ = 2 mA; defines output impedance during regulation, critical for load transient response |
| Temperature Coefficient SZ | +23.4 mV/K at IZ = 2 mA; quantifies drift per degree rise - requires thermal design margin in precision references |
| Junction Capacitance Cd | 1.0 pF at f = 1 MHz, VR = 0 V; enables use in high-frequency clamp and RF bias applications without signal distortion |
| Reverse Leakage IR | 50 nA max at VR = 0.7×VZnom (18.9 V); ensures minimal quiescent current in standby voltage-sense circuits |
| Forward Voltage VF | 0.9 V max at IF = 10 mA; supports bidirectional protection when paired with series diodes or in dual-rail clamp networks |
| Total Power Dissipation Ptot | 275 mW max on FR4 PCB; sets absolute upper limit for DC or pulsed power handling in compact SMT layouts |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, leadless construction with tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated metal pad; no electrical function - must remain unconnected in PCB layout |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential node and carries regulated output current |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-optimized selection where tight regulation is not required - e.g., power rail supervision with hysteresis |
| 1.0 pF junction capacitance | Minimizes signal loading in RF detector bias networks and high-speed transient clamping paths |
| Non-connected terminal (Pin 2) | Eliminates risk of unintended shorting in dense layouts; simplifies routing by removing one net assignment |
| 455 K/W junction-to-ambient thermal resistance | Defines derating curve: usable power drops to ~130 mW at Tamb = 85 °C on standard FR4 |
| 200 mA absolute maximum forward current | Supports robust ESD protection implementation when used in series with TVS devices or as part of multi-stage clamp |
Applications
| Power Supply Rail Clamp | Reference Voltage Source |
|---|---|
Use Scenario: Clamping 3.3 V or 5 V logic supply rails against ESD or switching transients in industrial I/O modules. IC Role / Device Role / Timing Role: Zener acts as shunt regulator to divert surge current above threshold, protecting downstream LDOs and microcontrollers. Use Value: 27 V rating provides sufficient headroom above 5 V rail while maintaining low capacitance to avoid signal integrity degradation. |
Use Scenario: Providing stable bias voltage for op-amp comparators in battery-powered sensor front-ends. IC Role / Device Role / Timing Role: Functions as passive voltage reference with predictable temperature drift for threshold detection. Use Value: +23.4 mV/K coefficient allows predictable offset compensation in temperature-compensated designs using matched components. |
| RF Signal Detector Bias | Overvoltage Protection in Analog Front-Ends |
Use Scenario: Biasing Schottky diode detectors in 2.4 GHz ISM-band receiver signal strength indicators. IC Role / Device Role / Timing Role: Supplies fixed reverse bias to maximize detector sensitivity and linearity. Use Value: 1.0 pF capacitance prevents detuning of matching networks at UHF frequencies. |
Use Scenario: Protecting ADC input pins from accidental 24 V field wiring faults in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt limiter that conducts only during overvoltage events, preserving normal signal path integrity. Use Value: 275 mW power rating sustains 100 ms fault duration at 24 V before thermal failure, enabling safe system shutdown. |
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 MMBZ5260BLT1G | 27 V, ±5 %, 200 Ω rdif, +23 mV/K SZ, 1.5 pF Cd, SOT-23 package | Lower differential resistance improves regulation accuracy but higher capacitance limits RF use | Select for tighter voltage control in DC bias networks where layout space permits larger SOT-23 footprint |
| Vishay BZX84-C27 | 27 V, ±5 %, 300 Ω rdif, +23 mV/K SZ, 1.0 pF Cd, identical SOT323 package and marking | No functional difference; fully interchangeable with same thermal and electrical behavior | Preferred for second-source assurance without redesign - identical pinout, footprint, and performance envelope |
Compared with MMBZ5260BLT1G, BZX84W-C27F offers lower parasitic capacitance for RF-sensitive designs; compared with BZX84-C27, it shares identical regulation characteristics but differs in Nexperia's qualification level and traceability documentation for industrial-grade procurement.
Availability
BZX84W-C27F is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation power management, and automotive body electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-C27F 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 discrete and logic devices, with manufacturing rooted in process innovation and automotive-grade quality systems.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective voltage regulation and clamping in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse power dissipation for BZX84W-C27F at 85 °C ambient?
At 85 °C ambient temperature, the device's usable power is derated linearly from 275 mW at 25 °C using its 455 K/W thermal resistance. This yields approximately 130 mW maximum continuous dissipation, calculated as P = (150 °C − 85 °C) / 455 K/W. Exceeding this risks thermal runaway and permanent parametric shift.
Can Pin 2 (n.c.) be grounded or left floating in PCB layout?
Pin 2 is internally unconnected and must remain electrically isolated - neither grounded nor tied to any net. Grounding it introduces risk of solder bridging or contamination-induced leakage paths. The datasheet explicitly defines it as "not connected", and layout guidelines require keeping it unassigned in copper pours and routing layers.
How does the +23.4 mV/K temperature coefficient affect stability in a 0 °C to 70 °C operating range?
Over a 70 K temperature span, the Zener voltage shifts by +1.64 V (23.4 mV/K × 70 K), resulting in a total range of 26.6 V to 28.6 V. This 7.3 % variation must be accommodated in reference-critical circuits via calibration or complementary temperature compensation techniques.
Is BZX84W-C27F suitable for automotive applications?
No - this variant is non-automotive qualified per Nexperia's revision history (Rev. 2, January 2023). It lacks AEC-Q200 stress testing and automotive-grade reliability screening. For automotive use, engineers must select the -Q qualified counterpart (e.g., BZX84W-C27F-Q) with documented PPAP and qualification reports.
BZX84W-C27F 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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 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-C27F FAQ
1.How can I place an order for BZX84W-C27F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C27F 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-C27F reliable?
The price and inventory of BZX84W-C27F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C27F is usually 5 days.
3.What payment methods are accepted for BZX84W-C27F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C27F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C27F?
BZX84W-C27F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C27F 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-C27F?
For technical support, including BZX84W-C27F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C27F requirements.
6.How does Aetrix verify that BZX84W-C27F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C27F 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-C27F meets industry standards.
7.What is the process for return or replacement of BZX84W-C27F?
All BZX84W-C27F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C27F, 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-C27F part is unused and in its original packaging.
Return procedure for BZX84W-C27F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C27F Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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