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Nexperia USA Inc. BZX84-B27/DG/B3R
- Part No.:
- BZX84-B27/DG/B3R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B27/DG/B3R.pdf
- Description:
- DIODE ZENER 27V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,237
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Product details
Overview
BZX84-B27/DG/B3R from Nexperia is a 27 V, 250 mW surface-mount Zener diode in SOT23 package with ±2% tolerance, 100 nA maximum reverse leakage at 20.3 V, and 15 Ω dynamic impedance, used for precision voltage regulation in low-power sensor biasing and reference circuits.
For engineers reviewing the BZX84-B27/DG/B3R datasheet, BZX84-B27/DG/B3R pinout, BZX84-B27/DG/B3R application, or BZX84-B27/DG/B3R equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, temperature coefficient, and SOT23 thermal performance in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. Its 27 V nominal Zener voltage is specified at 5 mA test current, with a temperature coefficient of +5.5 mV/K ensuring predictable drift over –65 °C to +150 °C operating range.
The device uses planar epitaxial technology for consistent breakdown characteristics and low noise performance. It complies with AEC-Q101 for automotive-grade reliability and supports reflow soldering per JEDEC J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±2% at IZ = 5 mA - ensures tight regulation in feedback networks requiring stable reference points |
| Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - limits continuous current to ~9.3 mA at 27 V, defining safe operating area in low-power designs |
| Dynamic Impedance (ZZT) | 15 Ω max at IZ = 5 mA - determines output voltage variation under load transients (e.g., ±0.15 V for ±10 mA change) |
| Reverse Leakage (IR) | 100 nA max at VR = 20.3 V - minimizes parasitic current draw in high-impedance bias networks |
| Temperature Coefficient | +5.5 mV/K - enables predictable voltage drift compensation in temperature-sensitive analog stages |
| Package | SOT23 - provides standard 3-pin footprint compatible with automated assembly and offers 125 °C/W junction-to-ambient thermal resistance |
Pinout & Package
SOT23 package: three-terminal surface-mount plastic case with gull-wing leads; cathode marked by band on top surface; standard pin 1 = anode, pin 2 = cathode, pin 3 = not connected (NC) - verified per Nexperia SOT23 mechanical drawing SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during regulation; defines current entry path into diode junction |
| Pin 2 | Cathode | Connected to higher-potential node; Zener voltage appears between this pin and anode; marked by cathode band |
| Pin 3 | Not Connected | No internal connection; electrically isolated; must remain unconnected in layout to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Reduces need for post-production trimming in voltage reference circuits, improving yield in production sensor modules |
| AEC-Q101 qualified | Validated for automotive applications including engine control unit (ECU) sensor interfaces and body electronics |
| Low dynamic impedance (15 Ω) | Enables stable regulation under fast load steps typical in microcontroller reset circuitry and ADC reference buffers |
| 100 nA reverse leakage | Preserves battery life in always-on IoT sensor nodes where quiescent current must stay below 1 µA |
Applications
| Industrial Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 27 V bias to bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt regulator to set sensor excitation voltage independent of 3.3 V/5 V rail fluctuations. Use Value: ±2% tolerance ensures sensor full-scale output remains within 0.5% error band across temperature and supply variance. | Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCUs in smart metering hardware. IC Role / Device Role / Timing Role: Functions as voltage detection element in discrete reset generator, triggering POR when VCC drops below 27 V × 0.9 = 24.3 V. Use Value: 15 Ω ZZT prevents false resets during brief 100 mA load transients on shared 27 V rail. |
| Automotive Cabin Temperature Sensor | IoT Node Reference Voltage |
Use Scenario: Supplying regulated 27 V reference to NTC thermistor interface in HVAC control units. IC Role / Device Role / Timing Role: Shunt regulator maintains constant current through thermistor string despite battery voltage swing from 9 V to 16 V. Use Value: +5.5 mV/K tempco allows linear compensation of thermistor nonlinearity over –40 °C to +85 °C ambient range. | Use Scenario: Establishing low-drift reference for 12-bit SAR ADC in battery-powered environmental monitor. IC Role / Device Role / Timing Role: Zener diode supplies reference voltage to ADC's REF+ input via RC filter, replacing external voltage reference IC. Use Value: 100 nA leakage avoids measurable offset error (<1 LSB) in high-impedance reference divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27,115 | ±5% tolerance, same SOT23 package and 27 V nominal rating | Acceptable where cost sensitivity outweighs precision requirements (e.g., non-critical power rail clamping) | Select when ±5% regulation error is permissible and AEC-Q101 qualification is not required |
| MMSZ5256B-7-F | 27 V ±5%, 500 mW rating, SOD-123 package, +6.5 mV/K tempco | Higher power handling suits transient suppression in 12 V automotive systems but lacks AEC-Q101 validation | Choose for higher surge robustness in non-automotive industrial controls where SOD-123 footprint is acceptable |
Compared with BZX84-B27/DG/B3R, the BZX84-C27 offers lower cost at reduced accuracy, while MMSZ5256B delivers double power rating in larger package-making the original optimal for space-constrained, automotive-grade 27 V reference needs.
Availability
BZX84-B27/DG/B3R is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset generation, and automotive cabin temperature sensing requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-B27/DG/B3R 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 with manufacturing sites in Europe, Asia, and the US.
This part belongs to the BZX84 series of precision Zener diodes designed specifically for voltage regulation and reference applications in automotive, industrial, and consumer electronics where tight tolerance and AEC-Q101 qualification are critical.
FAQ
What is the maximum reverse current before breakdown in BZX84-B27/DG/B3R?
The device exhibits less than 100 nA reverse leakage current at 20.3 V (75% of VZ), and breakdown is defined at 5 mA test current per JEDEC standards. Below 20.3 V, it behaves as a high-impedance blocking diode with negligible conduction.
Can BZX84-B27/DG/B3R be used in parallel for higher power dissipation?
No-Zener diodes cannot be reliably paralleled due to mismatched breakdown voltages causing current hogging. For >250 mW operation, use a single higher-rated device like PZM27NB or implement active regulation with a pass transistor.
Is the SOT23 package lead-free and RoHS compliant?
Yes-BZX84-B27/DG/B3R meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations per JEDEC J-STD-609 Category 1, with matte tin plating and no exemptions claimed.
How does temperature affect regulation accuracy in practical PCB layouts?
At 125 °C junction temperature, the +5.5 mV/K coefficient causes ~55 mV shift from 25 °C baseline-equivalent to 0.2% error. Layout best practices include minimizing copper pour near the diode and avoiding adjacent heat sources to keep Tj < 85 °C.
BZX84-B27/DG/B3R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B27/DG/B3R FAQ
1.How can I place an order for BZX84-B27/DG/B3R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B27/DG/B3R 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 BZX84-B27/DG/B3R reliable?
The price and inventory of BZX84-B27/DG/B3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B27/DG/B3R is usually 5 days.
3.What payment methods are accepted for BZX84-B27/DG/B3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B27/DG/B3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B27/DG/B3R?
BZX84-B27/DG/B3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B27/DG/B3R 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 BZX84-B27/DG/B3R?
For technical support, including BZX84-B27/DG/B3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B27/DG/B3R requirements.
6.How does Aetrix verify that BZX84-B27/DG/B3R is sourced from the original manufacturer or authorized distributors?
All BZX84-B27/DG/B3R 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 BZX84-B27/DG/B3R meets industry standards.
7.What is the process for return or replacement of BZX84-B27/DG/B3R?
All BZX84-B27/DG/B3R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B27/DG/B3R, 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 BZX84-B27/DG/B3R part is unused and in its original packaging.
Return procedure for BZX84-B27/DG/B3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B27/DG/B3R Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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