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Nexperia USA Inc. BZB84-B43,215
- Part No.:
- BZB84-B43,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B43,215.pdf
- Description:
- DIODE ZENER ARRAY 43V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
BZB84-B43,215 from Nexperia is a dual common-anode Zener diode in SOT23 (TO-236AB) package, rated for 43 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the BZB84-B43,215 datasheet, BZB84-B43,215 pinout, BZB84-B43,215 application, or BZB84-B43,215 equivalent, this device delivers precise dual-Zener clamping with AEC-Q101 qualification, low differential resistance (375 Ω at IZ = 2 mA), and thermal stability across −55 °C to +150 °C ambient.
Technical Context
This dual-Zener diode integrates two identical 43 V Zener elements sharing a common anode (Pin 3), enabling bidirectional voltage clamping or independent regulation paths in compact space-constrained layouts. Its construction supports fast transient suppression with 100 µs square-wave surge capability.
The device operates within a wide working voltage range (42.1–43.9 V at IZ = 2 mA), exhibits a positive temperature coefficient of +30.1 mV/K, and maintains ≤0.05 µA reverse leakage at 33.4 V, ensuring stable reference behavior under varying thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.1 V to 43.9 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection |
| Tolerance | ±2 % - enables tight regulation without external trimming in automotive-grade designs |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit for thermal design on FR4 PCB |
| Non-repetitive Peak Reverse Power | 40 W (tp = 100 µs) - supports ESD and load-dump transient suppression per ISO 7637-2 |
| Differential Resistance | 375 Ω max at IZ = 2 mA - determines regulation accuracy under dynamic current changes |
| Reverse Leakage Current | ≤0.05 µA at VR = 33.4 V - ensures minimal quiescent power loss in always-on circuits |
| Forward Voltage | ≤0.9 V at IF = 10 mA - allows use as low-drop rectifier or logic-level clamp |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small-outline transistor outline with gull-wing leads; footprint compatible with standard reflow soldering per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Diode 1) | Provides first Zener clamping path from Pin 1 to common anode (Pin 3) |
| 2 | Cathode (Diode 2) | Provides second independent Zener clamping path from Pin 2 to common anode (Pin 3) |
| 3 | Common Anode | Shared anode node; enables bidirectional clamping or dual-rail referencing in single-package layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode configuration | Enables symmetrical bidirectional voltage limiting or independent regulation of two signals sharing one ground-referenced rail |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration |
| ±2 % Zener voltage tolerance | Reduces need for post-production calibration in precision reference circuits and feedback loops |
| 40 W non-repetitive surge rating | Withstands ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2a (battery disconnect) transients without degradation |
| Low thermal resistance (Rth(j-sp) = 100 K/W) | Supports high pulse energy handling by efficiently transferring heat from junction to solder point on standard FR4 PCB |
Applications
| Automotive Load-Dump Protection | Industrial Sensor Signal Clamping |
|---|---|
Use Scenario: Protecting CAN transceiver inputs against 12 V system load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Dual-Zener clamps bidirectionally between signal line and ground, limiting voltage excursion to ±43 V while sinking surge current. Use Value: Prevents latch-up or permanent damage to transceiver ICs during battery-disconnect events without adding discrete TVS diodes. |
Use Scenario: Conditioning analog output of pressure sensors operating in 4–20 mA loop with 24 V supply. IC Role / Device Role / Timing Role: Provides overvoltage protection on sensor output line by clamping to 43 V relative to ground, referenced via common anode. Use Value: Maintains signal integrity during field wiring faults while consuming <0.1 µA standby current, avoiding loop-current disruption. |
| Power Supply Feedback Reference | Microcontroller Reset Circuit Clamp |
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter using optocoupler-coupled secondary-side regulation. IC Role / Device Role / Timing Role: One Zener diode (Pin 1–3) sets precise 43 V reference; second diode (Pin 2–3) provides redundancy or auxiliary monitoring path. Use Value: Achieves ±2 % output voltage accuracy over temperature without trimming, supporting AEC-Q100 Grade 2 compliance. |
Use Scenario: Protecting reset input of automotive MCU against ESD and board-level surges exceeding 30 V. IC Role / Device Role / Timing Role: Clamps reset line to 43 V (anode grounded) during positive transients; forward-biases to 0.9 V during negative excursions. Use Value: Eliminates need for separate bidirectional TVS, reducing BOM count while meeting ISO 10605 ESD immunity requirements. |
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-C43,215 | ±5 % Zener tolerance (vs. ±2 %); otherwise identical pinout, package, and surge ratings | Acceptable where cost sensitivity outweighs tight voltage accuracy; higher IR (0.05 µA vs. same) but same VZ range | Select for non-critical biasing or general-purpose clamping where ±5 % variation is acceptable |
| MMBZ5263BS-7-F | Single Zener (43 V, ±5 %), SOT-363 package, 200 mW Ptot, no common-anode dual configuration | Requires two devices for bidirectional clamping; lacks integrated dual-diode symmetry and AEC-Q101 qualification | Use only when dual functionality is unnecessary and automotive qualification is not required |
Compared with BZB84-C43,215, the BZB84-B43,215 offers tighter voltage control critical for feedback loops; versus MMBZ5263BS-7-F, it delivers integrated dual-clamp capability, higher surge robustness, and automotive-grade reliability in one SOT23 footprint.
Availability
BZB84-B43,215 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and microcontroller reset circuit design requiring stable component supply and long-term lifecycle support.
Supply support for BZB84-B43,215 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 components and advanced packaging.
The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum continuous reverse current the BZB84-B43,215 can sustain?
The device has no specified continuous reverse current rating; its operation is defined by power dissipation limits. At 25 °C ambient, maximum steady-state reverse current is calculated as IZ = Ptot/VZ ≈ 300 mW / 43 V ≈ 7 mA. Derating applies above 25 °C per Rth(j-a) = 417 K/W.
Can the BZB84-B43,215 be used for bidirectional ESD protection?
Yes - with Pin 3 (common anode) grounded, Pins 1 and 2 provide symmetrical ±43 V clamping. Forward conduction limits negative transients to ~0.9 V, making it suitable for IEC 61000-4-2 Level 4 ESD protection on data lines when combined with series impedance.
How does the temperature coefficient affect regulation accuracy over automotive temperature range?
At +30.1 mV/K, VZ increases ~1.5 V from −40 °C to +125 °C junction temperature. For applications requiring <1 % drift, external compensation or selection of lower-coefficient Zeners (e.g., 6.2 V types) is recommended; BZB84-B43,215 suits less sensitive clamping roles.
Is the SOT23 package lead-free and RoHS compliant?
Yes - Nexperia confirms the BZB84-B43,215 meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free matte tin (Sn) termination and halogen-free molding compound per IEC 61249-2-21.
BZB84-B43,215 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:
- Active
- Configuration:
- 1 Pair Common Anode
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZB84-B43,215 FAQ
1.How can I place an order for BZB84-B43,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B43,215 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 BZB84-B43,215 reliable?
The price and inventory of BZB84-B43,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-B43,215 is usually 5 days.
3.What payment methods are accepted for BZB84-B43,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B43,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B43,215?
BZB84-B43,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B43,215 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 BZB84-B43,215?
For technical support, including BZB84-B43,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B43,215 requirements.
6.How does Aetrix verify that BZB84-B43,215 is sourced from the original manufacturer or authorized distributors?
All BZB84-B43,215 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 BZB84-B43,215 meets industry standards.
7.What is the process for return or replacement of BZB84-B43,215?
All BZB84-B43,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B43,215, 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 BZB84-B43,215 part is unused and in its original packaging.
Return procedure for BZB84-B43,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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