My Inquiry
My Account
Nexperia USA Inc. BZX84-B12,215
- Part No.:
- BZX84-B12,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B12,215.pdf
- Description:
- DIODE ZENER 12V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:565,228
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84-B12,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 12 V nominal breakdown voltage at 5 mA test current, 250 mW total power dissipation, and 150 °C maximum junction temperature-used for precision low-power voltage reference and overvoltage protection in sensor signal conditioning circuits.
For engineers reviewing the BZX84-B12,215 datasheet, BZX84-B12,215 pinout, BZX84-B12,215 application, or BZX84-B12,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (≤150 Ω at IZ = 5 mA), reverse current (≤0.1 μA at VR = 9.6 V), thermal resistance (330 K/W junction-to-solder-point), and non-repetitive peak reverse power capability (40 W).
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 12 V nominal working voltage is defined at IZ = 5 mA with a typical temperature coefficient of +6.0 mV/K.
The diode exhibits low dynamic impedance (≤150 Ω), enabling effective regulation under small-signal conditions, and supports transient suppression via 40 W non-repetitive peak reverse power handling for pulse durations up to 100 μs at Tj = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.80 V to 12.20 V at IZ = 5 mA - defines regulated output voltage range under standard test conditions |
| Differential Resistance (rdif) | ≤150 Ω at IZ = 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Current (IR) | ≤0.1 μA at VR = 9.6 V - ensures minimal leakage below breakdown, critical for low-power standby operation |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard mounting |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp ≤ 100 μs - enables transient overvoltage clamping without device failure |
| Junction Temperature (Tj) | −55 °C to +150 °C - specifies operational thermal envelope for reliability in industrial environments |
| Thermal Resistance (Rth(j-sp)) | 330 K/W - quantifies thermal path efficiency from junction to cathode solder point for thermal design |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.9 mm × 1.1 mm footprint, 1.2 mm height, and standard reflow-compatible solder lands per Figure 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected in PCB layout |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as primary heat transfer path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants (BZX84-C12), reducing need for post-regulation trimming in 12 V reference designs |
| 250 mW power rating | Supports continuous regulation in space-constrained SMT applications without external heatsinking |
| 40 W non-repetitive surge capability | Provides robust ESD and transient immunity per IEC 61000-4-2 Level 4 when used in input protection networks |
| 330 K/W junction-to-solder-point thermal resistance | Allows direct thermal coupling to copper pour on FR4 PCB, improving long-term stability under thermal cycling |
| SOT23 footprint compatibility | Ensures drop-in replacement with industry-standard pick-and-place equipment and reflow profiles |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing bias voltage for analog front-end amplifiers in 4–20 mA loop-powered temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing 12 V rail for op-amp biasing and ADC reference scaling. Use Value: ±2 % tolerance ensures <±0.24 V error in 12 V reference, meeting IEC 61000-6-2 immunity requirements for industrial field devices. |
Use Scenario: Clamping induced surges on VBUS line during hot-plug events in embedded USB peripherals. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting VBUS to ≤12.2 V during 1 kV/500 A ESD pulses. Use Value: 40 W peak power rating absorbs 100 μs surges without degradation, preserving USB PHY integrity. |
| Low-Power Microcontroller Reset Circuit | Automotive Body Control Module Reference |
|
Use Scenario: Generating clean 12 V reset threshold for brown-out detection in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Precision Zener element setting trip point for external reset supervisor IC. Use Value: 0.1 μA max reverse leakage at 9.6 V minimizes quiescent current drain, extending shelf life in storage mode. |
Use Scenario: Providing stable 12 V reference for LIN bus transceiver biasing in non-safety-critical cabin modules. IC Role / Device Role / Timing Role: Voltage stabilization source for analog comparators monitoring battery supply health. Use Value: +6.0 mV/K temperature coefficient enables predictable drift compensation in 0–70 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12,215 | ±5 % tolerance (11.4–12.7 V), higher IR (≤0.2 μA at VR = 9.6 V), same package and Ptot | Acceptable where cost sensitivity outweighs regulation accuracy; unsuitable for <1 % reference designs | Select when budget constraints dominate and ±5 % voltage drift is acceptable in final system calibration |
| MMSZ5242B-7-F | ±5 % tolerance, 12 V nominal, SOD-123 package, 500 mW Ptot, Rth(j-a) = 350 K/W | Higher power handling but larger footprint; requires layout revision and thermal redesign | Choose only if 250 mW is insufficient and board space allows SOD-123 placement with enhanced copper pour |
Compared with BZX84-C12,215, the BZX84-B12,215 delivers tighter voltage control essential for precision analog stages; versus MMSZ5242B-7-F, it offers superior board-area efficiency and identical assembly compatibility while trading off absolute power headroom for miniaturization.
Availability
BZX84-B12,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB peripheral protection, microcontroller reset circuits, and automotive body electronics requiring stable component supply with consistent parametric performance across production lots.
Supply support for BZX84-B12,215 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 focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage reference and transient suppression in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current the BZX84-B12,215 can sustain at 12 V?
The BZX84-B12,215 is not rated for continuous reverse conduction at its Zener voltage. At VZ = 12 V, it draws ~5 mA under regulation; sustained current beyond 200 mA forward or reverse exceeds its absolute maximum rating and risks thermal runaway. Designers must limit average reverse power to ≤250 mW using series resistance.
Can the BZX84-B12,215 replace a 12 V Zener diode with ±1 % tolerance in an existing design?
No-BZX84-B12,215 has ±2 % tolerance (11.8–12.2 V), whereas ±1 % variants (e.g., BZX84-A12) specify 11.88–12.12 V. Substituting introduces up to 0.22 V additional voltage uncertainty, potentially violating tight reference margins in high-accuracy ADC or comparator circuits.
Is Pin 2 electrically functional or purely mechanical in the SOT23 package?
Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and has no internal bond wire or die connection. It serves only as a mechanical alignment aid during assembly and must remain unconnected in PCB routing to avoid unintended parasitic coupling or solder bridging.
How does the +6.0 mV/K temperature coefficient affect regulation accuracy over −40 °C to +85 °C?
Over that 125 K range, the coefficient causes ~0.75 V total drift (6.0 mV/K × 125 K). Since VZ = 12 V nominal, this represents ±3.1 % full-scale shift-acceptable for non-critical biasing but requiring compensation (e.g., thermistor network) in metrology-grade references.
BZX84-B12,215 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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B12,215 FAQ
1.How can I place an order for BZX84-B12,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B12,215 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-B12,215 reliable?
The price and inventory of BZX84-B12,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B12,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B12,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B12,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B12,215?
BZX84-B12,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B12,215 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-B12,215?
For technical support, including BZX84-B12,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B12,215 requirements.
6.How does Aetrix verify that BZX84-B12,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B12,215 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-B12,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B12,215?
All BZX84-B12,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B12,215, 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-B12,215 part is unused and in its original packaging.
Return procedure for BZX84-B12,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B12,215 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…
