My Inquiry
My Account
Diodes Incorporated BZX84C12W-7
- Part No.:
- BZX84C12W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84C12W-7.pdf
- Description:
- DIODE ZENER 12V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,029
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C12W-7 from Diodes Incorporated is a 12 V, 200 mW surface-mount Zener diode in SOT-323 package, rated for 5 mA test current with 11.4–12.7 V zener voltage range, 25 Ω max zener impedance at IZT, and 0.1 µA max reverse leakage at 8.0 V. It provides precision voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the BZX84C12W-7 datasheet, BZX84C12W-7 pinout, BZX84C12W-7 application, or BZX84C12W-7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (625 K/W), operating temperature range (−65 to +125 °C), and RoHS-compliant lead-free plating.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (25 Ω typical at 5 mA).
Designed for ultra-small PCB footprints, it delivers regulated reference voltage in space-constrained applications where thermal dissipation is limited to 200 mW on FR4 board with recommended pad layout, and exhibits a positive temperature coefficient of +6.0 to +10.0 mV/°C at 5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V min/max at 5 mA - defines stable regulation point for reference circuits |
| Power Dissipation (PD) | 200 mW - maximum continuous power on FR4 board with specified pad layout |
| Zener Impedance (ZZT) | 25 Ω max at 5 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 0.1 µA max at 8.0 V - ensures minimal quiescent current in standby bias networks |
| Thermal Resistance (RθJA) | 625 K/W - quantifies junction-to-ambient temperature rise per watt dissipated |
| Operating Temperature | −65 to +125 °C - supports industrial and automotive ambient environments |
| Temperature Coefficient | +6.0 to +10.0 mV/°C at 5 mA - indicates voltage drift direction and magnitude with temperature |
Pinout & Package
Package: SOT-323 - ultra-small surface-mount plastic case (2.0 × 1.25 × 0.9 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode reference ground node | Connected to circuit ground or lower potential; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 12 V reference when reverse biased; polarity marked on top surface (band denotes cathode) |
| Case | Non-electrical mechanical structure | No internal electrical connection; serves only as mechanical support and thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight zener voltage tolerance and repeatable breakdown characteristics across production lots |
| 200 mW power rating | Enables use in low-current reference and biasing without heatsinking on standard FR4 PCBs |
| SOT-323 package | Reduces board area by >50% vs. SOT-23; compatible with high-density automated assembly |
| Lead-free / RoHS compliant | Meets global environmental compliance requirements with matte tin plating over Alloy 42 leadframe |
| Green molding compound | Halogen-free encapsulation material meeting UL 94V-0 flammability rating |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 12 V reference for linear regulator feedback or ADC reference divider. IC Role / Device Role / Timing Role: Voltage reference element establishing precise DC bias point. Use Value: Maintains ±5% regulation accuracy over temperature and current variation, enabling <1% system reference error. |
Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 12 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground during ESD or surge events. Use Value: Limits voltage to ≤12.7 V at 5 mA, preventing latch-up or damage in 3.3 V/5 V logic interfaces. |
| Current Source Bias | Signal Level Translation |
Use Scenario: Setting bias current for op-amp input stages or transistor amplifiers using constant-voltage drop. IC Role / Device Role / Timing Role: Stable voltage drop element enabling predictable current mirror or emitter degeneration. Use Value: Delivers 12 V reference with <25 Ω dynamic impedance, ensuring <1% current variation across 1–5 mA operating range. |
Use Scenario: Translating 3.3 V logic signals to 12 V interface levels in mixed-voltage systems. IC Role / Device Role / Timing Role: Passive level-shifting node defining high-level threshold for comparator inputs. Use Value: Provides sharp 12 V switching threshold with <0.1 µA leakage, minimizing static power in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | 12 V nominal, 500 mW rating, 30 Ω ZZT, SOT-23 package | Higher power handling but larger footprint; less suitable for ultra-dense layouts | Choose when >200 mW dissipation or higher surge robustness is required |
| BZX84-C12LT1G | 12 V nominal, 350 mW rating, 30 Ω ZZT, SOT-23 package, −55 to +150 °C range | Wider temperature range and higher power, but incompatible SOT-23 footprint | Prefer for extended-temperature industrial designs where board space allows SOT-23 |
Compared with MMBZ5242B-7-F and BZX84-C12LT1G, BZX84C12W-7 offers the smallest PCB footprint (SOT-323) and lowest thermal resistance per unit area, making it optimal for space-constrained, low-power reference designs where strict 200 mW limits apply.
Availability
BZX84C12W-7 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, bias network stabilization, and signal level translation requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C12W-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
BZX84C12W-7 belongs to the BZX84C series of precision Zener diodes designed specifically for low-power voltage regulation and clamping in consumer, computing, and industrial electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX84C12W-7?
The BZX84C12W-7 begins controlled reverse breakdown at 11.4 V (minimum zener voltage) and is fully regulated up to 12.7 V (maximum) at 5 mA test current. Below 11.4 V, reverse leakage remains ≤0.1 µA at 8.0 V, confirming non-conductive behavior in sub-breakdown region.
Can BZX84C12W-7 be used in parallel for higher current capability?
No - Zener diodes exhibit manufacturing variations in breakdown voltage, causing uneven current sharing. Parallel connection risks thermal runaway in the unit with lowest VZ. For higher current, use a single higher-power Zener or active regulation instead.
Is the SOT-323 package compatible with standard reflow profiles?
Yes - the SOT-323 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity, supporting peak temperatures up to 260 °C. Recommended profile uses ramp rate ≤3 °C/s, preheat 150–200 °C for 60–120 s, and time above liquidus 60–90 s.
How does temperature affect the 12 V regulation accuracy?
At 5 mA test current, BZX84C12W-7 has a temperature coefficient of +6.0 to +10.0 mV/°C. Over −40 to +85 °C ambient, this introduces ±0.72 to ±1.2 V drift - requiring derating or compensation in precision references beyond basic regulation.
BZX84C12W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 200 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84C12W-7 FAQ
1.How can I place an order for BZX84C12W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C12W-7 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 BZX84C12W-7 reliable?
The price and inventory of BZX84C12W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C12W-7 is usually 5 days.
3.What payment methods are accepted for BZX84C12W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C12W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C12W-7?
BZX84C12W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C12W-7 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 BZX84C12W-7?
For technical support, including BZX84C12W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C12W-7 requirements.
6.How does Aetrix verify that BZX84C12W-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C12W-7 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 BZX84C12W-7 meets industry standards.
7.What is the process for return or replacement of BZX84C12W-7?
All BZX84C12W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C12W-7, 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 BZX84C12W-7 part is unused and in its original packaging.
Return procedure for BZX84C12W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C12W-7 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
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
