My Inquiry
My Account
Nexperia USA Inc. BZX84J-B12,115
- Part No.:
- BZX84J-B12,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B12,115.pdf
- Description:
- DIODE ZENER 12V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:9,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84J-B12,115 from Nexperia is a 12 V ±2 % Zener voltage regulator diode in SOD323F (SC-90) package, rated for 550 mW total power dissipation and 40 W non-repetitive peak reverse power at 100 µs pulse width, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZX84J-B12,115 datasheet, BZX84J-B12,115 pinout, BZX84J-B12,115 application, or BZX84J-B12,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (150 Ω @ 5 mA), AEC-Q101 qualification, thermal resistance (230 K/W), and SC-90 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 12 V regulation across load and line variations, with low differential resistance (150 Ω) ensuring minimal voltage drift under current changes from 1 mA to 20 mA. Its temperature coefficient of +6.0 mV/K at 5 mA enables predictable thermal behavior in ambient ranges from −55 °C to +150 °C.
Designed for transient suppression and reference stability, it supports pulsed non-repetitive surges up to 40 W (tp = 100 µs, square wave) and exhibits reverse leakage <0.1 µA at 9.6 V, enabling low-power standby regulation. The AEC-Q101 qualification confirms robustness for automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V to 12.7 V at IZ = 5 mA - tight ±2 % tolerance ensures accurate 12 V reference in feedback loops |
| Differential Resistance (rdiff) | 150 Ω max @ 5 mA - low impedance maintains regulation stability against load current variation |
| Total Power Dissipation (Ptot) | 550 mW @ Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W @ tp = 100 µs - supports short-duration surge clamping without failure |
| Reverse Leakage Current (IR) | 0.1 µA max @ VR = 9.6 V - enables ultra-low quiescent current in battery-backed circuits |
| Thermal Resistance (Rth(j-a)) | 230 K/W - determines junction-to-ambient temperature rise under steady-state operation |
| Forward Voltage (VF) | 1.1 V max @ IF = 100 mA - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
SOD323F (SC-90) surface-mount plastic package: 2-terminal, ultra-compact (2.3 × 1.35 × 0.95 mm), flat lead, 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; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| ±2 % Zener voltage tolerance | Enables precise voltage setting without post-production trimming in 12 V supply monitoring |
| Low differential resistance (150 Ω) | Minimizes output voltage deviation across 1–20 mA operating range in feedback networks |
| SC-90 (SOD323F) package | Supports 0.5 mm pad pitch and automated placement in space-constrained modules |
| 150 °C maximum junction temperature | Permits operation in under-hood environments without derating below 125 °C ambient |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control unit to detect undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Zener diode provides stable 12 V reference for comparator input in supply supervision circuit. Use Value: ±2 % tolerance ensures fault detection thresholds remain within 0.24 V margin, meeting ISO 16750-2 requirements. |
Use Scenario: Generating precision bias voltage for analog front-end of temperature sensor interface. IC Role / Device Role / Timing Role: Acts as shunt reference to set gain and offset in op-amp signal conditioning stage. Use Value: 150 Ω rdiff limits reference voltage shift to <15 mV over 100 µA load variation, preserving measurement accuracy. |
| USB-C PD Port Protection | Smart Meter Voltage Regulation |
Use Scenario: Clamping transient spikes on 12 V auxiliary rail in USB-C power delivery adapter. IC Role / Device Role / Timing Role: Shunt limiter absorbing 40 W surge energy during ESD or load dump events. Use Value: 40 W PZSM rating at 100 µs enables compliance with IEC 61000-4-5 Level 3 surge immunity. |
Use Scenario: Stabilizing microcontroller VREF supply in utility smart meter exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Provides temperature-compensated 12 V reference for ADC reference buffer. Use Value: +6.0 mV/K temperature coefficient allows predictable calibration offset correction across −40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12,115 | ±5 % tolerance (vs. ±2 %); higher rdiff (150 Ω typical vs. 150 Ω max); same package and PZSM | Acceptable where cost sensitivity outweighs precision requirement; less suitable for closed-loop feedback | Select for non-critical biasing where 12.6 V upper limit is acceptable |
| MMSZ4687T1G | 12 V ±5 %; SOD-123 package (larger footprint); 500 mW Ptot; no AEC-Q101 qualification | Not qualified for automotive use; requires larger PCB area; lower surge capability (30 W PZSM) | Choose only for industrial consumer designs with relaxed reliability and space constraints |
Compared with BZX84J-B12,115, the BZX84-C12,115 trades tighter voltage control for lower cost, while MMSZ4687T1G sacrifices automotive qualification and surge robustness for legacy footprint compatibility-making the BZX84J-B12,115 optimal for new AEC-Q101-compliant designs requiring precision and compactness.
Availability
BZX84J-B12,115 is available at Aetrix Electronics and suitable for automotive ECU monitoring, industrial sensor reference, USB-C PD port protection, and smart meter voltage regulation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84J-B12,115 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial voltage regulation where precision, surge resilience, and small-footprint reliability are critical.
FAQ
What is the maximum continuous reverse current the BZX84J-B12,115 can sustain at 12 V?
The device is not rated for continuous reverse current at nominal Zener voltage. Its maximum DC reverse current is limited by Ptot = 550 mW: at 12 V, IZ must stay ≤ 45.8 mA to avoid exceeding thermal limits. Operation above 20 mA requires board-level thermal design per Rth(j-a) = 230 K/W.
Does the BZX84J-B12,115 support bidirectional transient protection?
No-it is a unidirectional Zener diode configured for reverse-bias regulation only. It conducts in reverse breakdown above 12 V but blocks forward current above ~1.1 V; for bidirectional ESD protection, a dedicated TVS array or dual-diode configuration is required.
How does the +6.0 mV/K temperature coefficient impact regulation accuracy over temperature?
At 12 V nominal, +6.0 mV/K means voltage increases by ~0.72 V from −40 °C to +85 °C (125 K delta). This 6 % drift is compensated in precision systems via external calibration or by pairing with negative-coefficient components in reference divider networks.
Can the BZX84J-B12,115 be used in parallel for higher power dissipation?
Parallel operation is not recommended due to mismatched Zener voltages causing current hogging. Even with ±2 % tolerance, worst-case VZ spread (11.4 V vs. 12.7 V) leads to >90 % of current flowing through the lower-voltage unit, risking thermal runaway without active current balancing.
BZX84J-B12,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
BZX84J-B12,115 FAQ
1.How can I place an order for BZX84J-B12,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-B12,115 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 BZX84J-B12,115 reliable?
The price and inventory of BZX84J-B12,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84J-B12,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-B12,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B12,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B12,115?
BZX84J-B12,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-B12,115 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 BZX84J-B12,115?
For technical support, including BZX84J-B12,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B12,115 requirements.
6.How does Aetrix verify that BZX84J-B12,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-B12,115 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 BZX84J-B12,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-B12,115?
All BZX84J-B12,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-B12,115, 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 BZX84J-B12,115 part is unused and in its original packaging.
Return procedure for BZX84J-B12,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B12,115 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…
