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Nexperia USA Inc. BZB84-B56-QR
- Part No.:
- BZB84-B56-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B56-QR.pdf
- Description:
- BZB84-B56-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,353
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Product details
Overview
BZB84-B56-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 56 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides precise dual-voltage regulation in compact surface-mount designs, commonly deployed in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZB84-B56-QR datasheet, BZB84-B56-QR pinout, BZB84-B56-QR application, or BZB84-B56-QR equivalent, key selection criteria include Zener voltage tolerance, non-repetitive surge capability (40 W), thermal resistance (100 K/W junction-to-solder-point), dual-cathode/common-anode topology, and AEC-Q101 qualification status.
Technical Context
This dual Zener diode integrates two independent 56 V Zener elements sharing a common anode terminal, enabling simultaneous regulation or clamping at identical reference voltages. Its ±2 % voltage tolerance ensures tight output stability under varying load and temperature conditions.
The device supports non-repetitive peak reverse power dissipation up to 40 W (tp = 100 µs, square wave) and operates across −55 °C to +150 °C ambient range. Junction-to-solder-point thermal resistance is 100 K/W, facilitating reliable heat transfer in high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 54.9 V to 57.1 V at IZ = 2 mA - defines regulated output voltage window with ±2 % accuracy |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for 100 µs pulse - enables transient overvoltage suppression without failure |
| Differential Resistance (rdif) | 425 Ω max at IZ = 2 mA - determines regulation stiffness and output impedance in feedback paths |
| Reverse Current (IR) | 0.05 µA max at VR = 42 V - ensures minimal leakage in high-impedance sensing or bias networks |
| Temperature Coefficient (SZ) | −2.0 to +2.5 mV/K - quantifies Zener voltage drift per degree Celsius across operating range |
| Junction Temperature (Tj) | 150 °C maximum - defines upper thermal limit for safe operation under sustained load |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and standardized footprint for reflow/wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Primary Zener output node for first 56 V regulation path; connects to feedback or clamp point |
| 2 (K2) | Cathode of Diode 2 | Independent second 56 V regulation node; enables dual-path redundancy or split-rail referencing |
| 3 (CA) | Common Anode | Shared return path for both Zeners; ties to system ground or negative rail in dual-regulator configurations |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener topology | Two matched 56 V Zener elements in single SOT23 package reduce board area by ~40 % vs. discrete dual-diode solutions |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, temperature cycling, and ESD testing per JESD22-A114 |
| ±2 % Zener tolerance | Enables tighter closed-loop regulation in SMPS feedback networks without external trimming components |
| Low thermal resistance | 100 K/W junction-to-solder-point allows >200 mA pulsed current handling without exceeding Tj = 150 °C |
| High surge robustness | Withstands 40 W non-repetitive surges (100 µs) - suitable for CAN/LIN bus line protection and ESD clamp circuits |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC and internal LDOs in door module ECUs. IC Role / Device Role / Timing Role: Dual Zener provides stable 56 V rail for isolated sensor interface circuitry and overvoltage guardbanding. Use Value: AEC-Q101 qualification ensures 15-year field reliability; ±2 % tolerance eliminates need for post-assembly calibration. |
Use Scenario: Clamping transient spikes on 4–20 mA current loop inputs exposed to inductive switching noise. IC Role / Device Role / Timing Role: Common-anode dual Zener acts as bidirectional voltage limiter across differential input terminals. Use Value: 40 W surge rating absorbs 100 µs transients without degradation; SOT23 footprint fits dense I/O card layouts. |
| Automotive Infotainment Power Sequencing | Medical Diagnostic Equipment Reference Stability |
Use Scenario: Generating synchronized enable thresholds for multi-rail DC/DC converters during cold-cranking events. IC Role / Device Role / Timing Role: Dual cathodes drive independent enable pins while shared anode simplifies grounding and layout. Use Value: Matched Zener characteristics ensure <100 ns timing skew between rail activation signals under thermal stress. |
Use Scenario: Stabilizing precision voltage references for analog front-end amplifiers in portable ultrasound units. IC Role / Device Role / Timing Role: One Zener supplies reference to DAC; the other buffers comparator hysteresis threshold. Use Value: 0.05 µA max reverse leakage prevents reference drift in high-impedance bias networks at 55 °C ambient. |
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-C56-Q | ±5 % Zener tolerance (vs. ±2 %); otherwise identical electrical specs and package | Acceptable where cost sensitivity outweighs precision requirements, e.g., non-critical biasing | Select when tighter voltage matching is unnecessary and BOM cost reduction is prioritized |
| MMBZ5256BS | Single Zener (56 V, ±5 %), SOT323 package; no dual-cathode topology or AEC-Q101 rating | Limited to single-rail applications; unsuitable for automotive or dual-path designs | Choose only for space-constrained non-automotive prototypes where dual functionality is not required |
Compared with BZB84-C56-Q, the BZB84-B56-QR offers superior voltage accuracy critical for closed-loop regulation, while MMBZ5256BS lacks both dual functionality and automotive qualification-making it viable only for low-risk, single-channel consumer applications.
Availability
BZB84-B56-QR is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZB84-B56-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 high-volume, high-reliability logic, discrete, and MOSFET devices, with leadership in automotive-qualified components.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for dual-voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous forward current for BZB84-B56-QR?
The absolute maximum forward current per diode is 200 mA, as specified in Table 5 (Limiting Values). This rating applies at Tamb ≤ 25 °C on standard FR4 PCB with single-sided copper. Derating is required above 25 °C ambient per the thermal resistance curve in Table 6.
Can BZB84-B56-QR be used in parallel for higher power handling?
No-parallel connection of Zener diodes is not recommended due to mismatch in Zener voltage and dynamic resistance, which causes current imbalance and potential thermal runaway. For higher power, use a single higher-rated Zener or external current-sharing resistors with careful derating.
Is the common-anode configuration compatible with standard Zener test fixtures?
Yes-the CA pin (Pin 3) serves as the common reference, and K1/K2 (Pins 1 and 2) are independently accessible. Standard Zener testers can measure each diode by grounding CA and applying reverse bias to K1 or K2 separately, per Figure 11 pinning diagram.
Does BZB84-B56-QR support wave soldering?
Yes-Nexperia provides dedicated wave soldering footprint data (Figure 13), specifying 1.4 mm pad width, 2.2 mm length, and 2.6 mm spacing. The SOT23 package is qualified for both reflow and wave processes per JEDEC J-STD-020 and J-STD-006 standards.
BZB84-B56-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):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-B56-QR FAQ
1.How can I place an order for BZB84-B56-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B56-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-B56-QR reliable?
The price and inventory of BZB84-B56-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-B56-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B56-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B56-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B56-QR?
BZB84-B56-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B56-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-B56-QR?
For technical support, including BZB84-B56-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B56-QR requirements.
6.How does Aetrix verify that BZB84-B56-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B56-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-B56-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B56-QR?
All BZB84-B56-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B56-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-B56-QR part is unused and in its original packaging.
Return procedure for BZB84-B56-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B56-QR Tags
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MMBZ18VALT1G
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AZ23C18-7-F
Diodes Incorporated
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MMBZ6V2ALT1G
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MMBZ5V6ALT1G
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MMBZ6V8ALT1G
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MMBZ5V6ALT3G
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MMBZ33VALT1G
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MMBZ9V1ALT1G
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MMBZ20VALT1G
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SZMMBZ27VALT1G
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MMBZ15VALT1G
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MMBZ12VALT1G
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