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Nexperia USA Inc. BZB84-B24-QR
- Part No.:
- BZB84-B24-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B24-QR.pdf
- Description:
- BZB84-B24-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,417
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Product details
Overview
BZB84-B24-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 24 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and clamping functions.
For engineers reviewing the BZB84-B24-QR datasheet, BZB84-B24-QR pinout, BZB84-B24-QR application, or BZB84-B24-QR equivalent, this device serves as a space-constrained, dual-rail voltage reference and transient suppressor in engine control units, body electronics, and ADAS sensor interfaces where precision, thermal stability, and automotive-grade reliability are required.
Technical Context
This dual common-anode Zener diode integrates two independent 24 V Zener junctions sharing a single anode terminal, enabling bidirectional voltage clamping or dual-rail reference generation from one footprint. Its ±2 % tolerance ensures tight regulation across temperature and current variations.
Designed for automotive environments, it supports junction temperatures up to 150 °C and withstands non-repetitive 40 W surge pulses (100 µs square wave). Differential resistance is 250 Ω at IZ = 5 mA, and temperature coefficient is +16.8 mV/K - indicating positive drift optimized for stable biasing in wide-temperature systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.5 V to 24.5 V at IZ = 5 mA - defines precise regulation threshold for 24 V rail stabilization |
| Tolerance | ±2 % - enables high-accuracy voltage reference without external trimming |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets continuous thermal limit on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W (100 µs pulse) - supports ESD and load-dump transient suppression per ISO 7637-2 |
| Differential Resistance | 250 Ω max at IZ = 5 mA - determines regulation stiffness and output impedance under dynamic load |
| Temperature Coefficient | +16.8 mV/K - quantifies Zener voltage drift per degree Celsius rise, critical for thermal compensation design |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 18 V - ensures minimal leakage in high-impedance bias networks |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm, 1.9 mm pitch); thermally optimized for reflow soldering on FR4 PCB with single-sided copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated 24 V node; reverse-biased during Zener operation |
| 2 (K2) | Cathode of Diode 2 | Enables independent connection to second 24 V rail or complementary clamping path |
| 3 (CA) | Common Anode | Shared anode node tied to system ground or low-side reference; defines dual-diode topology |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Reduces PCB area by 50 % vs. two discrete SOT23 Zeners while maintaining independent cathode routing |
| AEC-Q101 qualification | Validated for automotive underhood applications including engine control, lighting, and infotainment power rails |
| ±2 % Zener voltage tolerance | Eliminates need for post-assembly calibration in 24 V industrial and automotive supply monitoring circuits |
| 40 W non-repetitive peak power rating | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (line transients) without failure |
| 150 °C maximum junction temperature | Supports operation in high-ambient environments such as powertrain ECUs and battery management modules |
Applications
| Engine Control Unit (ECU) Voltage Monitoring | Automotive LED Headlamp Driver Protection |
|---|---|
Use Scenario: Real-time monitoring of 24 V battery rail in diesel ECU to detect overvoltage/undervoltage faults. IC Role / Device Role / Timing Role: Dual Zener provides redundant 24 V reference for ADC input scaling and comparator thresholds. Use Value: ±2 % tolerance ensures fault detection accuracy within ±0.48 V, meeting ASIL-B diagnostic coverage requirements. |
Use Scenario: Clamping transient spikes induced by PWM switching in 24 V LED headlamp drivers. IC Role / Device Role / Timing Role: Common-anode configuration allows simultaneous clamping of both high-side and low-side driver outputs. Use Value: 40 W surge rating absorbs 100 µs load-dump events without degradation, extending driver MOSFET lifetime. |
| ADAS Camera Module Power Rail Stabilization | Body Control Module (BCM) CAN Transceiver Biasing |
Use Scenario: Providing stable 24 V reference for image sensor bias and lens actuator control in rear-view cameras. IC Role / Device Role / Timing Role: One Zener regulates sensor analog supply; the other stabilizes actuator motor driver reference. Use Value: 250 Ω differential resistance minimizes output impedance shift under varying camera frame-rate current loads. |
Use Scenario: Generating clean 24 V bias for isolated CAN FD transceivers in BCM power domains. IC Role / Device Role / Timing Role: Dual cathodes feed separate LDO inputs; common anode simplifies ground-return layout. Use Value: Leakage < 0.05 µA prevents false wake-up in low-power sleep modes, reducing quiescent current by >1 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZB84-C24-Q | ±5 % tolerance (vs. ±2 %); identical package, pinout, and surge rating | Acceptable where cost sensitivity outweighs precision requirement (e.g., non-safety-critical lighting) | Select when tighter voltage matching is unnecessary and BOM cost reduction is prioritized |
| MMBZ5245BS-7-F | Single Zener (24 V, ±5 %), SOT323 package; no dual configuration or AEC-Q101 qualification | Limited to single-rail use; unsuitable for automotive due to lack of stress qualification | Only consider for non-automotive, space-constrained consumer applications with relaxed reliability needs |
Compared with BZB84-C24-Q, the BZB84-B24-QR delivers 2.5× tighter voltage tolerance for safety-critical sensing, while MMBZ5245BS-7-F lacks both dual functionality and automotive qualification - making it incompatible for ECU or ADAS deployment.
Availability
BZB84-B24-QR is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, LED lighting drivers, and body electronics requiring stable component supply with AEC-Q101 compliance and traceable sourcing.
Supply support for BZB84-B24-QR 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-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient protection in harsh automotive environments.
FAQ
What is the maximum continuous forward current for BZB84-B24-QR?
The absolute maximum forward current per diode is 200 mA, but continuous operation above 100 mA requires derating based on ambient temperature and PCB copper area. At 25 °C ambient on standard FR4, sustained 100 mA forward conduction exceeds thermal limits unless heatsinking is added.
Can BZB84-B24-QR be used for bidirectional TVS protection?
No - it is not rated as a TVS diode. While its 40 W surge capability supports limited transient suppression, it lacks specified clamping voltage, breakdown symmetry, and IPP ratings required for true bidirectional TVS function. Use dedicated automotive TVS arrays like PESD5V0S1BA for that purpose.
How does the common-anode configuration affect circuit layout?
The shared anode (Pin 3) must connect to the lowest potential node (e.g., ground or low-side reference), while cathodes (Pins 1 and 2) route independently to separate 24 V nodes. This avoids shorting between regulated rails and simplifies ground-plane routing versus dual discrete Zeners.
Is the 24 V Zener voltage specified at DC or pulsed conditions?
Zener voltage is characterized at DC IZ = 5 mA per diode, per Table 8. Pulse testing (e.g., 100 µs surge) shifts VZ slightly due to thermal effects, but datasheet values reflect steady-state DC operation - critical for precision reference design.
BZB84-B24-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZB84-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Configuration:
- 1 Pair Common Anode
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 300 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZB84-B24-QR FAQ
1.How can I place an order for BZB84-B24-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B24-QR 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 BZB84-B24-QR reliable?
The price and inventory of BZB84-B24-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-B24-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B24-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B24-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B24-QR?
BZB84-B24-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B24-QR 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 BZB84-B24-QR?
For technical support, including BZB84-B24-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B24-QR requirements.
6.How does Aetrix verify that BZB84-B24-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B24-QR 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 BZB84-B24-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B24-QR?
All BZB84-B24-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B24-QR, 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 BZB84-B24-QR part is unused and in its original packaging.
Return procedure for BZB84-B24-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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