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Nexperia USA Inc. BZB84-B75-QR
- Part No.:
- BZB84-B75-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B75-QR.pdf
- Description:
- BZB84-B75-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,232
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Product details
Overview
BZB84-B75-QR from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 75 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation. It provides precise dual-voltage reference and overvoltage clamping in compact space-constrained circuits such as ECU power rails and sensor interface protection.
For engineers reviewing the BZB84-B75-QR datasheet, BZB84-B75-QR pinout, BZB84-B75-QR application, or BZB84-B75-QR equivalent, key selection criteria include its dual-Zener topology with shared anode, ±2 % voltage tolerance at 75 V, non-repetitive surge capability of 40 W, thermal resistance of 100 K/W to solder point, and automotive-grade qualification per AEC-Q101.
Technical Context
This dual-Zener diode integrates two independent Zener junctions sharing a common anode terminal (Pin 3), enabling bidirectional voltage regulation or dual-rail clamping from a single SOT23 footprint. Each cathode (Pins 1 and 2) operates independently with specified Zener voltage, differential resistance, and temperature coefficient.
Designed for stable operation across −55 °C to +150 °C ambient, it delivers 75 V regulation at IZ = 2 mA with typical differential resistance of 500 Ω and temperature coefficient of +52.5 mV/K - critical for minimizing drift in high-temperature automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 75 V nominal, ±2 % tolerance (73.5–76.5 V), specified at IZ = 2 mA for stable reference accuracy |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB - defines continuous thermal budget for PCB layout |
| Non-repetitive Peak Power | 40 W for tp = 100 µs square wave - supports transient overvoltage suppression without failure |
| Differential Resistance rdif | 500 Ω max at IZ = 2 mA - determines regulation stiffness and output impedance under load |
| Temperature Coefficient SZ | +52.5 mV/K typical - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Reverse Current IR | ≤ 0.05 µA at VR = 57 V - ensures low leakage in standby or high-impedance sensing nodes |
| Junction Temperature | 150 °C maximum - enables reliable operation in under-hood automotive locations |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K1 (Cathode 1) | Connects to regulated node requiring 75 V Zener clamping or reference; reverse-biased during regulation |
| 2 | K2 (Cathode 2) | Independent second 75 V Zener cathode - enables dual-path protection or redundancy without extra component |
| 3 | CA (Common Anode) | Shared anode connection; ties both Zener junctions to system ground or low-side reference rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces board area by 50 % vs. two discrete SOT23 Zeners while maintaining independent cathode control |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| ±2 % Zener voltage tolerance | Enables tighter regulation margins than ±5 % variants - critical for precision reference and fault-detection thresholds |
| Low thermal resistance to solder point | 100 K/W (junction-to-solder-point) allows effective heat transfer to PCB copper, improving long-term reliability |
| High surge robustness | Withstands 40 W non-repetitive pulses - protects downstream circuitry from ISO 7637-2 load-dump transients |
Applications
| Automotive ECU Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 12 V/24 V supply rails against load-dump transients in engine control modules. IC Role / Device Role / Timing Role: Dual-Zener clamping device providing symmetrical overvoltage protection on VBAT and VREF lines. Use Value: Prevents damage to microcontroller I/O and analog front-ends using single-device dual-path clamping with AEC-Q101 assurance. |
Use Scenario: Stabilizing excitation voltage for bridge-based pressure or temperature sensors in factory automation. IC Role / Device Role / Timing Role: Precision 75 V Zener reference source for high-voltage sensor biasing and ADC reference scaling. Use Value: Delivers ±2 % voltage accuracy and <500 Ω dynamic impedance to maintain sensor linearity and measurement repeatability. |
| Automotive Lighting Driver Feedback | Telecom Line Interface Protection |
Use Scenario: Providing stable feedback reference for constant-current LED drivers in headlamp control units. IC Role / Device Role / Timing Role: Dual-cathode Zener used in series-shunt configuration to regulate driver IC reference voltage and monitor open-load faults. Use Value: Enables dual-function operation (regulation + fault detection) within same footprint, reducing BOM count and layout complexity. |
Use Scenario: Protecting RS-485 transceiver inputs from induced surges on long industrial data lines. IC Role / Device Role / Timing Role: Bidirectional clamping element limiting differential input voltage to ±75 V during lightning-induced transients. Use Value: Leverages dual-Zener architecture to clamp both polarities without external polarity reversal components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZB84-C75-Q | Same 75 V nominal rating but ±5 % tolerance (70–79 V range) and higher differential resistance (550 Ω max) | Acceptable where tighter voltage accuracy is not required; lower cost for non-critical clamping | Select when AEC-Q101 compliance is retained but ±2 % tolerance is unnecessary |
| MMBZ5270B | Single 75 V Zener in SOT23; no dual-cathode topology; ±5 % tolerance; 225 mW Ptot | Requires two devices for dual-path protection; lacks common-anode integration | Choose only if dual-cathode functionality is not needed and board area is not constrained |
Compared with BZB84-C75-Q, the BZB84-B75-QR offers tighter voltage control and lower impedance for precision regulation; versus MMBZ5270B, it eliminates component count and layout overhead for dual-rail designs - directly impacting automotive ECU BOM cost and thermal management.
Availability
BZB84-B75-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, and telecom line interface protection requiring stable component supply, AEC-Q101 qualification, and dual-Zener functionality in SOT23.
Supply support for BZB84-B75-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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZB84-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current for BZB84-B75-QR at 75 V?
The device is not rated for continuous conduction at 75 V. Its specified Zener test current is 2 mA, and maximum DC reverse current at VR = 57 V is 0.05 µA. Operation above 75 V must be limited to short-duration surges within the 40 W non-repetitive peak power envelope (tp = 100 µs).
Can BZB84-B75-QR replace two separate 75 V Zeners in a design?
Yes - its dual common-anode structure replaces two discrete SOT23 Zeners, halving PCB footprint and assembly cost. Both cathodes operate independently at 75 V, enabling simultaneous regulation of two nodes referenced to the same ground plane without interaction.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C at 2.4 mW/°C (based on 300 mW @ 25 °C and Rth(j-a) = 417 K/W). For example, at 85 °C ambient, maximum allowable Ptot drops to approximately 156 mW to maintain Tj ≤ 150 °C.
Does the marking code 'RJ%' correspond exclusively to BZB84-B75-QR?
Yes - per Table 4 of the datasheet, 'RJ%' is the unique top-marking code for BZB84-B75-QR on the SOT23 package. This identifier enables field verification and traceability, distinguishing it from C-tolerance variants (e.g., BZB84-C75-Q marked 'PS%') and other voltage grades.
BZB84-B75-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):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-B75-QR FAQ
1.How can I place an order for BZB84-B75-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B75-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-B75-QR reliable?
The price and inventory of BZB84-B75-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-B75-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B75-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B75-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B75-QR?
BZB84-B75-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B75-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-B75-QR?
For technical support, including BZB84-B75-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B75-QR requirements.
6.How does Aetrix verify that BZB84-B75-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B75-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-B75-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B75-QR?
All BZB84-B75-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B75-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-B75-QR part is unused and in its original packaging.
Return procedure for BZB84-B75-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B75-QR Tags
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MMBZ18VALT1G
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AZ23C18-7-F
Diodes Incorporated
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MMBZ33VALT1G
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