My Inquiry
My Account
Nexperia USA Inc. BZX38450-C9V1X
- Part No.:
- BZX38450-C9V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C9V1X.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,394
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-C9V1X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and 3.8 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-C9V1X datasheet, BZX38450-C9V1X pinout, BZX38450-C9V1X application, or BZX38450-C9V1X equivalent, key selection criteria include low-test-current regulation accuracy, thermal stability in compact layouts, leakage-controlled switching behavior, and SOD323 footprint compatibility with high-density PCB designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining 9.1 V across its terminals under reverse-bias conditions when current exceeds the knee point (~50 µA). Its specified 100 Ω dynamic impedance at 5 mA ensures minimal output voltage variation under load shifts typical in reference supply rails.
The intentional minor rise in leakage current (per AN90031) reduces noise and improves transient response during fast switching events, while the −55 °C to +150 °C operating range supports industrial and automotive-adjacent environments where ambient thermal stress is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 9.1 V at IZ = 50 µA - defines precise reference point for low-bias analog circuitry |
| Tolerance | ±2 % - enables tight voltage margin control in calibration-critical signal chains |
| Differential Resistance (rdiff) | 100 Ω at IZ = 5 mA - limits output voltage drift under small load variations |
| Temperature Coefficient (SZ) | +3.8 mV/K - provides predictable, positive VZ drift over temperature for compensation design |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms standard silicon diode conduction for polarity verification |
| Max Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets safe continuous operating limit on FR4 PCB |
| Junction-to-Ambient Rth | 415 K/W - informs thermal derating requirements in unheatsinked layouts |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables use in microamp-level bias networks without loading error |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient settling |
| High-precision tolerance | ±2 % (C-series) - eliminates need for post-calibration trimming in mid-tier instrumentation |
| Thermal stability | +3.8 mV/K coefficient - allows predictable offset correction in temperature-compensated references |
| Compact SMD footprint | SOD323 outline - supports high-density routing in space-constrained IoT sensor modules |
Applications
| Portable Gas Sensor Calibration | Wearables Battery Monitor Reference |
|---|---|
Use Scenario: A CO₂ sensor module uses a 9.1 V Zener to bias its electrochemical transducer amplifier at fixed gain. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable excitation voltage independent of battery decay. Use Value: ±2 % tolerance and +3.8 mV/K coefficient allow direct temperature compensation in firmware, eliminating external trim components. |
Use Scenario: A smartwatch health SoC monitors Li-ion cell voltage via an ADC with internal 1.2 V reference; external 9.1 V Zener supplies clean bias to its LDO feedback divider. IC Role / Device Role / Timing Role: Precision voltage reference for analog power management circuitry. Use Value: 50 µA test current draws negligible standby current, extending battery life beyond 7 days in always-on mode. |
| Industrial RTD Signal Conditioning | Automotive Cabin Controller Bias Rail |
Use Scenario: A 4–20 mA loop transmitter conditions Pt100 RTD signals using op-amps powered from a 9.1 V rail derived from this Zener. IC Role / Device Role / Timing Role: Low-drift voltage reference establishing measurement full-scale range. Use Value: 100 Ω rdiff ensures <10 mV output shift across 0–1 mA load variation, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: A non-safety-critical HVAC controller uses this Zener to generate a stable 9.1 V rail for its CAN transceiver's VIO supply. IC Role / Device Role / Timing Role: Secondary voltage reference supporting interface IC biasing in extended-temperature zones. Use Value: −55 °C to +150 °C operating range accommodates under-dash mounting without derating, while SOD323 reflow compatibility matches automotive PCB assembly standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B9V1 | Same 9.1 V nominal, but ±5 % tolerance and higher rdiff (150 Ω) | Suitable only where cost outweighs precision; not recommended for calibrated sensor paths | Select only if BOM cost reduction is primary and system-level calibration is performed externally |
| MMSZ5240B | 9.1 V nominal, ±5 %, 100 Ω rdiff, but rated for 500 mW and larger SOD-123 package | Requires PCB redesign; better for higher-power analog rails but incompatible with ultra-dense layouts | Choose when thermal headroom >300 mW is needed and board area permits SOD-123 footprint |
Compared with BZX38450-C9V1X, BZX384-B9V1 sacrifices accuracy for cost, while MMSZ5240B trades miniaturization for thermal robustness - making the C9V1X optimal for space-constrained, precision-biased systems requiring ±2 % stability at microamp bias levels.
Availability
BZX38450-C9V1X is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and industrial signal conditioning requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C9V1X 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 leadership in advanced packaging and automotive-qualified components.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power reference and biasing applications where test-current sensitivity, thermal predictability, and SMD scalability are critical.
FAQ
What is the maximum reverse current (IR) at 9.1 V for BZX38450-C9V1X?
At VR = 9.1 V and Tj = 25 °C, the typical reverse current is 0.1 µA, with a maximum of 0.5 µA per Table 8. This ultra-low leakage ensures minimal parasitic loading in high-impedance reference dividers and extends battery life in always-on monitoring circuits.
Can BZX38450-C9V1X be used in place of a 9.1 V TL431-based shunt regulator?
No - the BZX38450-C9V1X is a passive two-terminal Zener diode, lacking the adjustable reference, internal amplifier, and cathode-anode current gain of the TL431. It serves only as a fixed-voltage shunt reference, not as an active regulation element capable of driving loads or supporting feedback loops.
Is the 9.1 V Zener voltage specified at DC or pulsed conditions?
The 9.1 V nominal value is specified under DC test conditions at IZ = 50 µA, as confirmed in Table 8. Pulse testing applies only to forward voltage (VF) characterization (tp ≤ 300 µs), not to Zener voltage specification - ensuring stable DC reference performance in static bias applications.
Does the "C" in BZX38450-C9V1X indicate automotive qualification?
No - the "C" denotes the ±2 % tolerance grade per Nexperia's internal coding scheme (Table 4), not AEC-Q200 qualification. This part is not automotive-qualified; it is rated for industrial temperature range (−55 °C to +150 °C) but lacks automotive-specific reliability testing, traceability, or PPAP documentation.
BZX38450-C9V1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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:
- SOD-323
BZX38450-C9V1X FAQ
1.How can I place an order for BZX38450-C9V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C9V1X 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 BZX38450-C9V1X reliable?
The price and inventory of BZX38450-C9V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C9V1X is usually 5 days.
3.What payment methods are accepted for BZX38450-C9V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C9V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C9V1X?
BZX38450-C9V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C9V1X 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 BZX38450-C9V1X?
For technical support, including BZX38450-C9V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C9V1X requirements.
6.How does Aetrix verify that BZX38450-C9V1X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C9V1X 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 BZX38450-C9V1X meets industry standards.
7.What is the process for return or replacement of BZX38450-C9V1X?
All BZX38450-C9V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C9V1X, 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 BZX38450-C9V1X part is unused and in its original packaging.
Return procedure for BZX38450-C9V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C9V1X 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…
