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Nexperia USA Inc. BZX84-B24,215
- Part No.:
- BZX84-B24,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B24,215.pdf
- Description:
- DIODE ZENER 24V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:34,384
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Product details
Overview
BZX84-B24,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 24 V nominal breakdown voltage at 5 mA test current, 250 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog supply rails and sensor interface circuits.
For engineers reviewing the BZX84-B24,215 datasheet, BZX84-B24,215 pinout, BZX84-B24,215 application, or BZX84-B24,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (≤250 Ω at IZ = 5 mA), thermal resistance (330 K/W junction-to-solder point), and SOT23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable DC voltage under varying load or input conditions. Its 24 V nominal Zener voltage is specified at IZ = 5 mA with a maximum differential resistance of 250 Ω and temperature coefficient of +16.8 mV/K, indicating positive drift with junction temperature rise.
The SOT23 package enables surface-mount integration with defined thermal performance: Rth(j-a) = 500 K/W (free air), Rth(j-sp) = 330 K/W (to cathode solder point). Non-repetitive surge capability supports transient suppression up to 40 W for 100 μs pulses at Tj = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.5 V to 24.5 V at IZ = 5 mA - defines regulation setpoint with ±2 % tolerance for stable reference generation |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 5 mA - determines output impedance and load regulation error under current variation |
| Reverse Current (IR) | ≤0.05 μA at VR = 19.2 V - ensures minimal leakage below knee voltage, critical for low-power standby circuits |
| Temperature Coefficient (SZ) | +16.8 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius, enabling thermal error budgeting in precision designs |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous DC power limit for thermal design and derating calculations |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - defines transient surge handling capability for ESD or inductive kick clamping |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - specifies forward conduction drop when used in polarity protection or OR-ing configurations |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; carries forward current during conduction |
| 2 | Not Connected (n.c.) | Internal die bond wire stub; electrically isolated and must remain unconnected on PCB |
| 3 | Cathode (K) | Connected to higher-potential node in reverse-bias configuration; primary heat path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-regulation trimming in mid-precision applications |
| 250 mW power rating in SOT23 | Supports compact, low-cost voltage reference design without heatsinking in ambient temperatures ≤25 °C |
| 330 K/W junction-to-solder-point thermal resistance | Allows direct thermal coupling to copper pour for improved steady-state power handling beyond free-air limits |
| 40 W non-repetitive surge rating | Provides robust transient immunity against 100 μs ESD events or inductive switch-off spikes without degradation |
| Low 0.05 μA reverse leakage at 80 % VZ | Minimizes quiescent current draw in battery-powered systems where standby current is critical |
Applications
| Power Supply Reference | Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Providing stable 24 V reference for ADC biasing and op-amp feedback networks in industrial transmitters. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage independent of supply ripple. Use Value: ±2 % tolerance and +16.8 mV/K temperature coefficient allow predictable error modeling across –40 °C to +85 °C operating range. |
Use Scenario: Clamping amplifier input to prevent overvoltage damage from EMI-coupled transients on 4–20 mA loop sensors. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between signal line and ground, conducting only above 24 V. Use Value: 40 W surge rating handles 100 μs spikes without failure, while 250 Ω differential resistance limits clamping overshoot. |
| Microcontroller Reset Circuit | LED Current Regulation |
|
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers using resistor-divider + Zener clamp topology. IC Role / Device Role / Timing Role: Precision voltage threshold element defining logic-high reset release point after power ramp-up. Use Value: Low 0.05 μA leakage at 19.2 V ensures negligible divider current error, preserving reset timing accuracy. |
Use Scenario: Setting constant current for indicator LEDs in automotive dashboard modules with 24 V nominal supply. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage across series current-limiting resistor to stabilize LED brightness. Use Value: 250 mW rating supports up to ~10 mA continuous shunt current, sufficient for multi-LED bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5249BS-7-F | 24 V ±5 % tolerance, 350 mW Ptot, SOT23 package, rdif ≤350 Ω | Higher power and looser tolerance suit cost-sensitive, non-critical biasing where thermal margin >250 mW is needed | Select when board-level thermal management allows higher dissipation and ±5 % regulation accuracy is acceptable |
| Vishay BZX84-C24-TP | 24 V ±5 % tolerance, 300 mW Ptot, SOT23 package, rdif ≤300 Ω, IR ≤0.1 μA at VR = 19.2 V | Higher leakage and wider tolerance reduce precision but improve surge margin and cost efficiency | Choose for general-purpose clamping where ±5 % VZ and 300 mW headroom outweigh tight tolerance requirements |
Compared with BZX84-B24,215, the MMBZ5249BS-7-F offers higher power but looser tolerance and higher impedance, while the BZX84-C24-TP trades precision for broader surge margin and lower unit cost-making the BZX84-B24,215 optimal for mid-accuracy reference and clamping where thermal and tolerance constraints are balanced.
Availability
BZX84-B24,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, LED bias networks, and low-power analog reference designs requiring stable component supply and SOT23 footprint consistency.
Supply support for BZX84-B24,215 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, with leadership in automotive-qualified and industrial-grade components.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and overvoltage protection in space-constrained, cost-sensitive consumer and industrial electronics.
FAQ
What is the maximum continuous reverse current this diode can handle at 24 V?
The BZX84-B24,215 is not rated for continuous reverse conduction at 24 V; its Zener operation requires controlled current limiting. At 24 V, the maximum continuous reverse current is determined by Ptot = 250 mW, yielding IZ(max) ≈ 10.4 mA (250 mW ÷ 24 V). Exceeding this risks thermal runaway without external current limiting.
Can this Zener diode be used in parallel for higher power dissipation?
No-parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages and thermal coefficients. Even small VZ variations cause current hogging in one device, leading to premature failure. For higher power, use a single higher-rated Zener or active regulation instead.
How does the 2nd pin (n.c.) affect PCB layout or thermal design?
Pin 2 is internally not connected and must remain unconnected on the PCB. It does not contribute to thermal conduction or electrical function. Layout should avoid routing traces or placing copper under this pad to prevent unintended coupling or solder bridging during reflow.
Is the temperature coefficient of +16.8 mV/K measured at full rated current?
Yes-the +16.8 mV/K temperature coefficient is specified at IZ = 5 mA and Tj = 25 °C, per Table 8. This value increases slightly at higher currents and varies with junction temperature; actual drift over –40 °C to +125 °C is nonlinear and documented in Figure 6–7 of the datasheet.
BZX84-B24,215 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):
- 24 V
- Tolerance:
- ±2%
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B24,215 FAQ
1.How can I place an order for BZX84-B24,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B24,215 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-B24,215 reliable?
The price and inventory of BZX84-B24,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B24,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B24,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B24,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B24,215?
BZX84-B24,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B24,215 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-B24,215?
For technical support, including BZX84-B24,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B24,215 requirements.
6.How does Aetrix verify that BZX84-B24,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B24,215 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-B24,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B24,215?
All BZX84-B24,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B24,215, 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-B24,215 part is unused and in its original packaging.
Return procedure for BZX84-B24,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B24,215 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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