My Inquiry
My Account
onsemi BZX84C24_D87Z
- Part No.:
- BZX84C24_D87Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C24_D87Z.pdf
- Description:
- DIODE ZENER 24V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,427
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C24_D87Z from ON Semiconductor (formerly Fairchild) is a 24 V ±5% surface-mount Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with typical zener impedance of 25 Ω at 20 mA and reverse leakage current ≤0.05 µA at 16.8 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84C24_D87Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal resistance (RJA = 465°C/W), and SOT-23 footprint compatibility in space-constrained PCB designs.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable DC voltage across its terminals. It exhibits a positive temperature coefficient above ~5 V, with BZX84C24_D87Z showing +18.4 mV/°C drift at 5 mA, enabling predictable thermal behavior in bias networks and feedback loops.
Designed for operation at nominal test currents of 1 mA, 5 mA, and 20 mA, it delivers specified VZ min/max bounds (22.8–25.6 V at 5 mA) and supports low-duty-cycle transient clamping via IFRM = 250 mA peak forward current rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8–25.6 V at IZ = 5 mA - defines regulated output range under standard test condition |
| Zener Impedance (ZZ) | 25 Ω max at IZ = 20 mA - determines output voltage stability under load variation |
| Power Dissipation (PD) | 250 mW at TA = 25°C - sets maximum continuous DC power handling on FR-4 PCB |
| Reverse Leakage (IR) | ≤0.05 µA at VR = 16.8 V - ensures minimal quiescent current in high-impedance reference paths |
| Thermal Resistance (RJA) | 465°C/W - indicates junction-to-ambient heat transfer efficiency on standard 76.2 × 114.3 mm board |
| Operating Temperature | −55°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with cathode marked by band; standard pin assignment applies across BZX84C series.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Reverse breakdown terminal | Connected to higher-potential node; voltage referenced to this terminal during regulation |
| Case / Heat Sink | Non-electrical mechanical interface | No internal electrical connection; serves only as thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without external trimming in cost-sensitive consumer and industrial supplies |
| Low 25 Ω dynamic impedance at 20 mA | Minimizes output voltage deviation under varying load current in feedback divider networks |
| 16.8 V reverse voltage rating (VR) | Provides defined leakage threshold for reliable turn-on margin in overvoltage detection circuits |
| +18.4 mV/°C tempco at 5 mA | Allows predictable compensation in temperature-stable reference designs using matched components |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role: Provides precise 24 V reference for optocoupler input biasing and TL431-type comparator thresholds. Use Value: Maintains <±1% output regulation across line/load variations due to tight VZ tolerance and low ZZ. | Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 18 V. IC Role / Device Role: Shunts excess energy to ground when input voltage exceeds 24 V breakdown threshold. Use Value: Limits clamped voltage to ≤25.6 V with fast response, preventing latch-up in 3.3 V/5 V logic interfaces. |
| Sensor Bias Network | ADC Input Protection |
Use Scenario: Supplying stable excitation voltage to resistive bridge sensors in industrial pressure transducers. IC Role / Device Role: Acts as low-noise, low-drift voltage source for Wheatstone bridge top rail. Use Value: Delivers <10 ppm/°C effective tempco when combined with resistor ratio matching, improving measurement accuracy. | Use Scenario: Preventing damage to SAR ADC input front-end during hot-plug events in data acquisition modules. IC Role / Device Role: Clamps analog input to safe level before signal conditioning amplifier stage. Use Value: Ensures input stays within −0.3 V to VDD + 0.3 V range while adding <1 pF parasitic capacitance to preserve bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5249BS-7-F | Same 24 V nominal, ±5% tolerance, but rated for 225 mW and RJA = 400°C/W | Lower power rating requires derating above 70°C ambient; tighter ZZ = 20 Ω at 20 mA | Prefer for thermally constrained layouts where lower thermal resistance improves reliability |
| 1SMA5929BT3G | Higher 1.5 W power rating, DO-214AC package, VZ = 24 V ±5%, ZZ = 15 Ω at 41 mA | Requires larger PCB area; suited for surge-heavy industrial inputs rather than signal-level regulation | Choose when clamping high-energy transients (>100 A surge) where SOT-23 cannot sustain energy |
Compared with MMBZ5249BS-7-F and 1SMA5929BT3G, BZX84C24_D87Z offers optimal balance of SOT-23 footprint, 250 mW capability, and 25 Ω impedance for general-purpose voltage referencing-making it ideal for space-limited, moderate-power analog subsystems where thermal management is feasible.
Availability
BZX84C24_D87Z is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, sensor excitation, and ADC input conditioning requiring stable component supply across production lifecycles.
Supply support for BZX84C24_D87Z 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud computing, medical, and IoT applications.
BZX84C24_D87Z belongs to the BZX84C series of general-purpose Zener diodes designed specifically for compact, cost-effective voltage regulation and protection in consumer, industrial, and communications equipment.
FAQ
What is the exact zener voltage range for BZX84C24_D87Z at 5 mA test current?
The BZX84C24_D87Z has a guaranteed zener voltage range of 22.8 V to 25.6 V when measured at IZ = 5 mA and TA = 25°C, per the official ON Semiconductor datasheet Rev. 1.10. This 5% tolerance band reflects manufacturing spread and ensures predictable regulation performance in production designs using BZX84C24_D87Z.
Does BZX84C24_D87Z support operation at elevated ambient temperatures?
Yes, BZX84C24_D87Z is rated for continuous operation from −55°C to +150°C junction temperature. At elevated ambient temperatures, derating is required: its 250 mW power dissipation limit decreases linearly above 25°C based on RJA = 465°C/W, reaching zero at approximately 76°C ambient on standard FR-4 PCB per the absolute maximum ratings table in the BZX84C24_D87Z datasheet.
What is the reverse leakage current specification for BZX84C24_D87Z?
The BZX84C24_D87Z specifies a maximum reverse leakage current (IR) of 0.05 µA at VR = 16.8 V and TA = 25°C. This low leakage enables use in high-impedance bias networks and precision reference dividers where current draw must remain below 100 nA, as confirmed in the Electrical Characteristics table of the BZX84C24_D87Z datasheet.
Can BZX84C24_D87Z be used for ESD protection in USB or GPIO lines?
BZX84C24_D87Z is not optimized for ESD protection: its 250 mW rating and 25 Ω impedance are insufficient for IEC 61000-4-2 Level 4 (15 kV air) events. While it can clamp slow overvoltages, dedicated TVS diodes like PESD5V0S1BA are recommended for robust ESD immunity. BZX84C24_D87Z serves best as a voltage reference-not an ESD suppressor-in systems using BZX84C24_D87Z.
Is the SOT-23 package of BZX84C24_D87Z compatible with standard reflow profiles?
Yes, the SOT-23 package of BZX84C24_D87Z supports standard lead-free reflow soldering per IPC/JEDEC J-STD-020. Its plastic body withstands peak temperatures up to 260°C for 10 seconds, and thermal resistance values (RJA, RJL) in the BZX84C24_D87Z datasheet confirm suitability for automated assembly. No special process adjustments are needed beyond standard SMT guidelines for discrete diodes.
BZX84C24_D87Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±6%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C24_D87Z FAQ
1.How can I place an order for BZX84C24_D87Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C24_D87Z 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 BZX84C24_D87Z reliable?
The price and inventory of BZX84C24_D87Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C24_D87Z is usually 5 days.
3.What payment methods are accepted for BZX84C24_D87Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C24_D87Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C24_D87Z?
BZX84C24_D87Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C24_D87Z 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 BZX84C24_D87Z?
For technical support, including BZX84C24_D87Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C24_D87Z requirements.
6.How does Aetrix verify that BZX84C24_D87Z is sourced from the original manufacturer or authorized distributors?
All BZX84C24_D87Z 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 BZX84C24_D87Z meets industry standards.
7.What is the process for return or replacement of BZX84C24_D87Z?
All BZX84C24_D87Z units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C24_D87Z, 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 BZX84C24_D87Z part is unused and in its original packaging.
Return procedure for BZX84C24_D87Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C24_D87Z 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
