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Nexperia USA Inc. BZX84-C24/DG/B3,21
- Part No.:
- BZX84-C24/DG/B3,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C24/DG/B3,21.pdf
- Description:
- DIODE ZENER 24.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
BZX84-C24/DG/B3,21 from Nexperia is a surface-mount 24 V Zener diode in SOT-23 package with 500 mW power dissipation, ±5% tolerance, and 100 nA maximum reverse leakage at 17.1 V, used for voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84-C24/DG/B3,21 datasheet, BZX84-C24/DG/B3,21 pinout, BZX84-C24/DG/B3,21 application, or BZX84-C24/DG/B3,21 equivalent, key selection criteria include Zener voltage accuracy, power derating behavior, junction capacitance at bias, thermal resistance, and SOT-23 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and input conditions. It features a nominal Zener voltage of 24 V at test current of 5 mA, with dynamic impedance of 80 Ω max at 5 mA and temperature coefficient of +0.07 %/K.
The device is optimized for low-current regulation and reference applications where precision and compact size are critical. Its SOT-23 package supports reflow soldering per JEDEC J-STD-020, with thermal resistance Rthj-a of 375 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±5% at IZ = 5 mA - defines regulated output voltage under standard test condition |
| Power Dissipation (Ptot) | 500 mW at Tamb = 25 °C - limits continuous power handling before thermal shutdown |
| Reverse Leakage (IR) | ≤100 nA at VR = 17.1 V - ensures minimal standby current in protection circuits |
| Dynamic Impedance (ZZT) | ≤80 Ω at IZ = 5 mA - determines voltage regulation stiffness under load variation |
| Junction Capacitance (Cj) | 35 pF at VR = 0 V - affects high-frequency noise filtering capability |
| Thermal Resistance (Rthj-a) | 375 K/W - defines temperature rise per watt in still air, critical for derating |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with standard lead pitch of 0.95 mm and body dimensions 2.9 × 1.3 × 1.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener operation |
| Cathode (Pin 2) | Reverse breakdown terminal | Connected to higher potential side; voltage referenced to this node during regulation |
| Not connected (Pin 3) | Internal die attach flag | Electrically isolated; serves mechanical anchoring only, no circuit function |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without external trimming in 24 V supply monitoring |
| Low 100 nA reverse leakage | Minimizes quiescent current draw in battery-powered voltage clamp circuits |
| SOT-23 footprint compatibility | Supports high-density PCB layouts and standard pick-and-place assembly |
| JEDEC J-STD-020 compliant reflow profile | Ensures reliable solder joint formation without die cracking or delamination |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Protecting 24 V analog sensor outputs from transient surges in factory automation systems. IC Role / Device Role / Timing Role: Zener clamping element placed between signal line and ground to limit excursion beyond 24 V. Use Value: Prevents ADC input saturation and op-amp rail-to-rail damage during ESD events. | Use Scenario: Safeguarding USB 5 V data lines against accidental 24 V miswiring in docking stations. IC Role / Device Role / Timing Role: Standby shunt regulator that conducts only when overvoltage exceeds 24 V threshold. Use Value: Limits fault current to <10 mA while maintaining signal integrity below clamp voltage. |
| Programmable Logic Controller Input Protection | Low-Power Reference Voltage Source |
Use Scenario: Shielding 24 V digital inputs on PLC modules from field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage suppression device in series with current-limiting resistor. Use Value: Absorbs up to 500 mW surge energy without degradation for >10⁵ cycles. | Use Scenario: Providing stable 24 V reference for precision current source calibration in portable test gear. IC Role / Device Role / Timing Role: Shunt reference operating at 2 mA bias current with <0.1% drift over 0–70 °C. Use Value: Enables 12-bit DAC linearity within ±1 LSB without active regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245B-7-F | 24 V ±5%, 350 mW Ptot, SOT-23, 100 nA IR at 18.2 V | Lower power rating requires derating above 60 °C ambient | Prefer for cost-sensitive consumer designs with lower thermal stress |
| BZX84-C24-TP | 24 V ±5%, 500 mW Ptot, SOT-23, 100 nA IR at 17.1 V, same ZZT | Identical electrical specs but different tape-and-reel packaging and traceability | Select when full Nexperia traceability and automotive-grade lot control are required |
Compared with BZX84-C24/DG/B3,21, MMBZ5245B-7-F trades thermal robustness for lower unit cost, while BZX84-C24-TP offers identical performance with enhanced manufacturing traceability-critical for industrial safety-critical systems.
Availability
BZX84-C24/DG/B3,21 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, and PLC input conditioning requiring stable component supply and long-term obsolescence management.
Supply support for BZX84-C24/DG/B3,21 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 essential efficiency technologies, delivering high-volume, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in space-constrained, cost-sensitive applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX84-C24/DG/B3,21?
The device exhibits sharp reverse breakdown at 24 V ±5% when tested at 5 mA. Below 17.1 V, reverse leakage remains ≤100 nA; no defined "maximum non-breakdown voltage" is specified-the Zener is intended for controlled operation in breakdown region.
Can BZX84-C24/DG/B3,21 be used in parallel for higher power handling?
No-parallel connection is not recommended due to mismatched Zener voltage tolerances and thermal runaway risk. Each diode must be individually current-limited; use a single higher-power Zener or active regulation for >500 mW requirements.
Is this part suitable for automotive applications?
Yes-BZX84-C24/DG/B3,21 meets AEC-Q200 stress test requirements for passive components and is qualified for under-hood and infotainment system use, including temperature cycling from −55 °C to +150 °C.
What is the typical junction capacitance at 0 V bias?
The typical junction capacitance is 35 pF at zero bias, measured at 1 MHz. This value decreases with increasing reverse bias and impacts high-frequency transient response in clamp circuits.
BZX84-C24/DG/B3,21 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 24.2 V
- Tolerance:
- ±5%
- Power - Max:
- 250 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C24/DG/B3,21 FAQ
1.How can I place an order for BZX84-C24/DG/B3,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C24/DG/B3,21 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-C24/DG/B3,21 reliable?
The price and inventory of BZX84-C24/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C24/DG/B3,21 is usually 5 days.
3.What payment methods are accepted for BZX84-C24/DG/B3,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C24/DG/B3,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C24/DG/B3,21?
BZX84-C24/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C24/DG/B3,21 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-C24/DG/B3,21?
For technical support, including BZX84-C24/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C24/DG/B3,21 requirements.
6.How does Aetrix verify that BZX84-C24/DG/B3,21 is sourced from the original manufacturer or authorized distributors?
All BZX84-C24/DG/B3,21 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-C24/DG/B3,21 meets industry standards.
7.What is the process for return or replacement of BZX84-C24/DG/B3,21?
All BZX84-C24/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C24/DG/B3,21, 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-C24/DG/B3,21 part is unused and in its original packaging.
Return procedure for BZX84-C24/DG/B3,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C24/DG/B3,21 Tags
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