My Inquiry
My Account
Nexperia USA Inc. BZX8450-B9V1R
- Part No.:
- BZX8450-B9V1R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B9V1R.pdf
- Description:
- DIODE ZENER 9.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,505
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX8450-B9V1R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing in portable electronics. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and 6.9 mV/K temperature coefficient. Used in battery-powered sensor signal conditioning circuits where stable low-current reference is critical.
For engineers reviewing the BZX8450-B9V1R datasheet, BZX8450-B9V1R pinout, BZX8450-B9V1R application, or BZX8450-B9V1R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, and validated alternative options for low-current Zener regulation in space-constrained designs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode–anode terminals under varying load currents from 50 µA to 5 mA. Its specified 9.1 V nominal Zener voltage (min 8.92 V, max 9.28 V) is guaranteed at IZ = 50 µA, enabling accurate low-bias operation.
The BZX8450-B9V1R features intentional minor leakage optimization per AN90031, supporting fast switching response and reduced noise in analog front-ends. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V (min 8.92 V, max 9.28 V at IZ = 50 µA); defines precise regulation point for low-current reference circuits |
| Tolerance | ±2 % (B-series); ensures tight voltage accuracy without trimming in production |
| Differential Resistance | 100 Ω max at IZ = 5 mA; determines output impedance and load regulation sensitivity |
| Temperature Coefficient | +6.9 mV/K; quantifies Zener voltage drift over temperature for stability-critical applications |
| Forward Voltage | 0.9 V max at IF = 10 mA; defines anode–cathode drop during forward conduction |
| Total Power Dissipation | 250 mW max at Tamb ≤ 25 °C on FR4 PCB; sets thermal design boundary for PCB layout |
| Junction Temperature Limit | 150 °C; constrains maximum allowable operating temperature for reliability |
| Reverse Current | 0.1 µA max at VR = 7.3 V; specifies leakage level below regulation threshold |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal in forward bias; connected to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Regulated output node in reverse bias; ties to supply rail being stabilized |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | 50 µA Zener test condition enables ultra-low-power biasing in battery-operated systems |
| Optimized leakage profile | Intentional minor rise in leakage (per AN90031) improves switching speed and reduces noise in analog signal paths |
| Tight voltage tolerance | ±2 % (B-series) eliminates need for post-assembly calibration in precision reference designs |
| Thermal performance | 330 K/W junction-to-solder-point thermal resistance supports reliable operation with minimal copper area |
| Small-footprint packaging | SOT23 footprint (2.9 mm × 1.3 mm) allows placement in space-constrained IoT sensor modules and wearables |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing fixed 9.1 V reference for sensor bridge biasing. Use Value: Enables <1 µA quiescent current in sleep mode while maintaining ±0.18 V regulation accuracy over −40 °C to +85 °C. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in handheld medical diagnostic devices. IC Role / Device Role / Timing Role: Precision voltage reference source for analog-to-digital conversion. Use Value: Delivers 9.1 V ±0.18 V with <100 Ω dynamic impedance, reducing code-dependent reference error by up to 0.5 LSB. |
| USB-C Power Negotiation | IoT Node Voltage Clamp |
Use Scenario: Stabilizing VCONN line voltage during USB-C cable detection and PD communication. IC Role / Device Role / Timing Role: Low-current voltage clamp regulating auxiliary power rail during handshake phases. Use Value: Maintains 9.1 V compliance within ±2 % while drawing only 50 µA-compatible with USB-C's 1 mA VCONN budget. |
Use Scenario: Clamping microcontroller I/O voltage in LoRaWAN end-nodes powered by single-cell LiFePO4. IC Role / Device Role / Timing Role: Overvoltage protection and rail stabilization for 3.3 V logic interfacing with 9 V sensor supplies. Use Value: Limits transient overshoot to <9.3 V with 0.1 µA leakage at 7.3 V, preventing GPIO damage without loading the battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 | ±5 % tolerance (vs. ±2 %), higher 150 Ω rdiff at 5 mA, same 9.1 V nominal | Acceptable where cost sensitivity outweighs precision; less suitable for ADC references | Select when tighter regulation isn't required and BOM cost reduction is prioritized |
| MMSZ5240B | Same ±2 % tolerance but 9.1 V nominal at 20 mA test current; higher 100 mW Ptot; SOD-123 package | Requires higher bias current; larger footprint limits use in ultra-compact designs | Choose only if existing SOD-123 layout exists and 50 µA operation is not mandatory |
Compared with BZX8450-B9V1R, BZX84-C9V1 trades accuracy for cost, while MMSZ5240B demands higher bias current and occupies more board area-making the BZX8450-B9V1R optimal for miniaturized, low-quiescent-current Zener applications.
Availability
BZX8450-B9V1R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and USB-C power negotiation requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX8450-B9V1R 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-performance, energy-efficient components for automotive, industrial, and consumer markets.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding tight voltage accuracy at microampere bias levels.
FAQ
What is the maximum continuous reverse power dissipation for BZX8450-B9V1R?
The maximum total power dissipation is 250 mW at ambient temperature ≤25 °C on a standard FR4 PCB with single-sided 70 μm copper. Derating is required above 25 °C at 2.0 mW/°C, based on a thermal resistance of 500 K/W junction-to-ambient.
Is pin 2 electrically functional in the SOT23 package?
No-pin 2 is internally not connected (n.c.) and must remain unconnected on the PCB. It serves only as a mechanical alignment aid during placement and has no electrical role in regulation or conduction.
How does the BZX8450-B9V1R differ from the C-series variant BZX84-C9V1?
BZX8450-B9V1R offers ±2 % tolerance and 100 Ω differential resistance at 5 mA, whereas BZX84-C9V1 provides ±5 % tolerance and 150 Ω rdiff. Both share identical 9.1 V nominal voltage and SOT23 package, but the B-series delivers higher precision for reference-critical functions.
Can BZX8450-B9V1R be used in place of a 9.1 V Zener requiring 1 mA test current?
Yes-but regulation voltage will shift slightly: its specified 9.1 V is guaranteed at 50 µA, and typical VZ rises to ~9.15 V at 1 mA due to dynamic resistance. For designs relying on 1 mA test points, verify actual VZ vs. load in final circuit.
BZX8450-B9V1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- 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:
- 100 nA @ 6.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B9V1R FAQ
1.How can I place an order for BZX8450-B9V1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B9V1R 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 BZX8450-B9V1R reliable?
The price and inventory of BZX8450-B9V1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B9V1R is usually 5 days.
3.What payment methods are accepted for BZX8450-B9V1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B9V1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B9V1R?
BZX8450-B9V1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B9V1R 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 BZX8450-B9V1R?
For technical support, including BZX8450-B9V1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B9V1R requirements.
6.How does Aetrix verify that BZX8450-B9V1R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B9V1R 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 BZX8450-B9V1R meets industry standards.
7.What is the process for return or replacement of BZX8450-B9V1R?
All BZX8450-B9V1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B9V1R, 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 BZX8450-B9V1R part is unused and in its original packaging.
Return procedure for BZX8450-B9V1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B9V1R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
