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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX84-B9V1,215

Name: BZX84-B9V1,215
Brand: Nexperia USA Inc.
SKU: BZX84-B9V1,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B9V1,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84-B9V1,215.pdf

Description:: DIODE ZENER 9.1V 250MW TO236AB

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Product details

Overview

BZX84-B9V1,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 9.1 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 3.0 A non-repetitive peak reverse current - used for precision low-power voltage reference and overvoltage protection in DC power rails.

For engineers reviewing the BZX84-B9V1,215 datasheet, BZX84-B9V1,215 pinout, BZX84-B9V1,215 application, or BZX84-B9V1,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (330 K/W junction-to-solder-point), differential resistance (≤100 Ω), temperature coefficient (+3.8 mV/K), and SOT23 footprint compatibility with automated PCB assembly.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener breakdown threshold. Its behavior is defined by tightly controlled V_Z = 8.92–9.28 V at I_Z = 5 mA, with low dynamic impedance (rdif ≤ 100 Ω) ensuring minimal regulation error under transient load shifts.

Designed for surface-mount integration on FR4 PCBs with single-sided 70 µm copper, it relies on thermal conduction through the cathode terminal (Pin 3) to limit junction temperature rise - supported by R_th(j-sp) = 330 K/W and absolute maximum T_j = 150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.92 V to 9.28 V at 5 mA - defines regulated rail voltage with ±2 % tolerance band
Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C - sets continuous DC bias limit on standard FR4 PCB
Differential Resistance (r_dif)	≤100 Ω - determines output voltage variation per 1 mA load current change
Temperature Coefficient (S_Z)	+3.8 mV/K - quantifies V_Z drift per degree Celsius rise in junction temperature
Peak Reverse Current (I_ZSM)	3.0 A for 100 μs - supports transient surge suppression without failure
Forward Voltage (V_F)	≤0.9 V at 10 mA - enables use as polarity-sensitive clamp or logic-level detector
Junction-to-Solder-Point R_th	330 K/W - governs thermal path efficiency when mounted on standard SMT footprint

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.3 mm height, and standard 0.95 mm lead pitch; optimized for reflow soldering per IPC-7095 guidelines.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased input terminal; connects to lower-potential node in shunt regulation
2	Not Connected (n.c.)	Internal die bond wire stub - electrically isolated and must remain unconnected
3	Cathode (K)	Reverse-biased output terminal; primary thermal path to PCB copper pour

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables tighter regulation than ±5 % variants (BZX84-C) in feedback loops requiring <1 % error budget
Low differential resistance (≤100 Ω)	Reduces output voltage deviation to <100 mV under ±1 mA load step changes
Non-repetitive peak power rating (40 W)	Supports ESD/IEC 61000-4-2 level 4 transient suppression without derating
150 °C maximum junction temperature	Allows operation in industrial ambient environments up to +105 °C with proper PCB thermal design
SOT23 footprint compatibility	Enables drop-in replacement in legacy designs using BZX84-A/B/C series and avoids redesign of stencil or placement files

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Stabilizing feedback voltage in low-current linear regulators or op-amp reference circuits.

IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 9.1 V reference point for error amplifier input.

Use Value: Maintains ±2 % output accuracy over -55 °C to +125 °C ambient with <100 Ω dynamic impedance.

Use Scenario: Protecting microcontroller I/O pins from accidental 12 V rail exposure during hot-plug events.

IC Role / Device Role / Timing Role: Bidirectional clamping element limiting voltage excursion to 9.1 V + 0.9 V forward drop.

Use Value: Absorbs 3.0 A surge for 100 μs without degradation, preventing latch-up in 3.3 V logic interfaces.

Signal Level Translation

Current Source Bias

Use Scenario: Converting 5 V logic signals to 9.1 V levels for driving external analog comparators.

IC Role / Device Role / Timing Role: Passive level-shifting node establishing upper rail for open-drain output stages.

Use Value: Provides stable 9.1 V offset with <±0.5 % drift over 10 kΩ load range due to low rdif.

Use Scenario: Setting bias current in discrete transistor amplifiers via constant-voltage drop across emitter resistor.

IC Role / Device Role / Timing Role: Precision voltage source defining base-emitter voltage differential for current mirror legs.

Use Value: Delivers 5 mA test current with <0.1 % regulation error, enabling <0.5 % current matching in matched pairs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5240BLT1G	9.1 V ±5 % tolerance; 350 mW P_tot; higher rdif (≤150 Ω); SOT23-3 package	Looser voltage accuracy but higher power headroom for intermittent loads	Select when cost sensitivity outweighs regulation precision and thermal margin exceeds 250 mW
Vishay BZX84-C9V1-TP	9.1 V ±5 % tolerance; identical 250 mW rating; higher rdif (≤150 Ω); same SOT23 footprint	Reduced voltage stability under varying temperature/load but broader availability	Choose for non-critical biasing where ±5 % V_Z drift is acceptable and supply chain diversification is prioritized

Compared with BZX84-B9V1,215, the MMBZ5240BLT1G trades ±2 % tolerance for +40 % power margin, while the BZX84-C9V1-TP retains identical thermal and packaging constraints but sacrifices regulation accuracy - making the BZX84-B9V1,215 optimal for designs demanding tight voltage control within constrained thermal envelopes.

Availability

BZX84-B9V1,215 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, signal level translation, and current source bias applications requiring stable component supply and consistent ±2 % Zener tolerance.

Supply support for BZX84-B9V1,215 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 headquartered in Nijmegen, Netherlands, specializing in high-volume production of essential semiconductors including logic, discretes, MOSFETs, and bipolar transistors.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for reliable low-power voltage regulation in consumer, industrial, and communication equipment where compact size and parametric consistency are critical.

FAQ

What is the maximum continuous reverse current this diode can handle at 25 °C ambient?

The BZX84-B9V1,215 is not rated for continuous reverse current - it operates in Zener breakdown mode with current limited by external series resistance. At 25 °C ambient on a standard FR4 PCB, its 250 mW power limit corresponds to ~27.5 mA average reverse current (250 mW ÷ 9.1 V). Exceeding this risks thermal runaway unless heatsinking or derating is applied.

Can this device be used in place of a BZX84-A9V1 for improved voltage accuracy?

No - the BZX84-A9V1 offers ±1 % tolerance (8.99–9.21 V), which is tighter than the BZX84-B9V1,215's ±2 % (8.92–9.28 V). Substituting the 'B' grade for 'A' degrades regulation accuracy by up to 0.1 V at room temperature and increases temperature-induced drift, making it unsuitable where <±1 % V_Z stability is required.

Does Pin 2 require PCB connection or grounding?

No - Pin 2 is internally not connected (n.c.) per Nexperia's official pinning diagram. It must remain unconnected on the PCB layout; routing copper to or near this pad may cause unintended parasitic coupling or solder bridging, compromising reliability and measurement integrity.

How does the +3.8 mV/K temperature coefficient affect long-term voltage stability?

A +3.8 mV/K coefficient means V_Z increases by 3.8 mV per °C rise in junction temperature. Over a 100 °C junction swing (e.g., from 25 °C to 125 °C), this causes +380 mV drift - approximately +4.2 % of nominal 9.1 V. System-level compensation (e.g., complementary NTC networks or digital calibration) is needed for sub-1 % total error across full operating range.

BZX84-B9V1,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX84

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 9.1 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 6 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-B9V1,215 FAQ

1.How can I place an order for BZX84-B9V1,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B9V1,215 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-B9V1,215 reliable?

The price and inventory of BZX84-B9V1,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B9V1,215 is usually 5 days.

3.What payment methods are accepted for BZX84-B9V1,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B9V1,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B9V1,215?

BZX84-B9V1,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B9V1,215 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-B9V1,215?

For technical support, including BZX84-B9V1,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B9V1,215 requirements.

6.How does Aetrix verify that BZX84-B9V1,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-B9V1,215 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-B9V1,215 meets industry standards.

7.What is the process for return or replacement of BZX84-B9V1,215?

All BZX84-B9V1,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B9V1,215, 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-B9V1,215 part is unused and in its original packaging.

Return procedure for BZX84-B9V1,215:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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