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Nexperia USA Inc. BZX84-A75,215
- Part No.:
- BZX84-A75,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-A75,215.pdf
- Description:
- DIODE ZENER 75V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
BZX84-A75,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 75 V nominal breakdown voltage at 2 mA test current, 250 mW total power dissipation, and 500 Ω maximum differential resistance - used for precision voltage reference and overvoltage protection in low-power analog supply rails.
For engineers reviewing the BZX84-A75,215 datasheet, BZX84-A75,215 pinout, BZX84-A75,215 application, or BZX84-A75,215 equivalent, key selection criteria include Zener voltage tolerance (±1 %), thermal resistance (330 K/W junction-to-solder-point), non-repetitive peak reverse current (0.20 A), temperature coefficient (+52.5 mV/K), and SOT23 footprint compatibility with automated PCB assembly.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a load by conducting reverse current when input exceeds its 75 V Zener threshold. Its ±1 % tolerance ensures tight regulation in feedback networks and reference circuits where accuracy is critical.
Designed for surface-mount use on FR4 PCBs with single-sided 70 µm copper, it delivers 250 mW continuous dissipation at 25 °C ambient and withstands 40 W non-repetitive surge pulses (100 µs, square wave). Junction temperature remains within 150 °C limit under specified derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 74.25 V to 75.75 V at IZ = 2 mA - defines precise clamping point for voltage-sensitive circuits |
| Tolerance | ±1 % - enables high-accuracy reference generation without external trimming |
| Differential Resistance (rdif) | ≤500 Ω at IZ = 2 mA - determines regulation stiffness and load-induced voltage drift |
| Temperature Coefficient (SZ) | +52.5 mV/K at IZ = 2 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Current (IR) | ≤0.2 µA at VR = 57 V - ensures minimal leakage below regulation threshold |
| Non-repetitive Peak Reverse Current (IZSM) | 0.20 A at tp = 100 µs - supports transient overvoltage suppression in surge-prone interfaces |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum steady-state power handling on standard FR4 layout |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with 1.9 mm × 1.1 mm body, 0.95 mm height, and standard 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder joint required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and serves as primary heat path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct use in precision references without calibration or trimming circuitry |
| 250 mW power rating at 25 °C ambient | Supports regulation in space-constrained, low-power applications such as sensor signal conditioning |
| 330 K/W junction-to-solder-point thermal resistance | Allows effective heat transfer from cathode pad to PCB copper, enabling reliable operation up to 150 °C junction temperature |
| 0.20 A non-repetitive peak reverse current capability | Provides robust transient suppression for ESD and inductive kick events in industrial I/O circuits |
| SOT23 footprint compatibility | Ensures drop-in placement on standard reflow and wave soldering lines using documented land patterns (Fig. 12–13) |
Applications
| Industrial Sensor Reference | Low-Power Supply Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 75 V bias to Wheatstone bridge, compensating for supply ripple. Use Value: ±1 % tolerance ensures <±0.75 V absolute error in bridge excitation, directly improving measurement linearity and repeatability. |
Use Scenario: Protecting microcontroller ADC inputs from accidental overvoltage during field wiring faults. IC Role / Device Role / Timing Role: Clamping diode limiting input voltage to 75 V + forward drop, preventing latch-up or oxide damage. Use Value: 0.20 A peak surge current rating absorbs 40 W transients (100 µs), meeting IEC 61000-4-5 Level 3 surge immunity requirements. |
| Programmable Logic Controller (PLC) Input Protection | Automotive Body Control Module (BCM) Reference |
Use Scenario: Guarding 24 V DC digital input channels against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed before optocoupler input, diverting surge energy to ground. Use Value: 500 Ω differential resistance minimizes voltage overshoot during fast-rising transients, reducing false triggering risk. |
Use Scenario: Generating stable 75 V reference for high-side gate driver bias in 48 V mild-hybrid BCM power stages. IC Role / Device Role / Timing Role: Precision Zener reference feeding error amplifier in isolated flyback feedback loop. Use Value: +52.5 mV/K temperature coefficient allows predictable compensation of gate driver offset drift across -40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5265B | 75 V nominal, ±5 % tolerance, 350 mW Ptot, 700 Ω rdif | Lower accuracy and higher dynamic impedance - suitable only where cost outweighs regulation precision | Select when ±5 % tolerance is acceptable and higher power margin is needed for intermittent loads |
| Vishay BZX84-C75 | 75 V nominal, ±5 % tolerance, same SOT23 package and 250 mW rating | Higher leakage (≤5 µA at 57 V) and wider voltage spread (70–79 V) - reduces reference stability in precision circuits | Choose only for non-critical clamping where cost sensitivity precludes ±1 % grade |
Compared with BZX84-A75,215, MMBZ5265B trades tighter voltage control for higher power headroom, while BZX84-C75 sacrifices accuracy and leakage performance for lower unit cost - making the A-grade part optimal for applications demanding stable 75 V references under thermal or load variation.
Availability
BZX84-A75,215 is available at Aetrix Electronics and suitable for industrial sensor reference, low-power supply clamp, PLC input protection, and automotive BCM reference requiring stable component supply, consistent parametric performance, and long-term SMT manufacturing support.
Supply support for BZX84-A75,215 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, headquartered in Nijmegen, Netherlands, with manufacturing in Europe and Asia.
The BZX84 series belongs to Nexperia's precision Zener regulator product line, engineered specifically for stable voltage referencing and overvoltage protection in cost-sensitive, space-constrained SMT applications across industrial and consumer electronics.
FAQ
What is the maximum continuous reverse current this diode can handle at 75 V?
The BZX84-A75,215 is not rated for continuous conduction at 75 V. Its maximum continuous reverse current is determined by power dissipation: at 75 V, safe continuous current is ≤3.33 mA (250 mW ÷ 75 V), assuming 25 °C ambient and proper PCB thermal design. Exceeding this risks thermal runaway.
Can Pin 2 be grounded or left floating in PCB layout?
Pin 2 is internally not connected (n.c.) and must remain electrically floating - no trace, via, or solder joint should connect to it. Grounding Pin 2 creates an unintended short path and violates the device's internal construction, risking failure or unpredictable regulation behavior.
How does the +52.5 mV/K temperature coefficient affect circuit accuracy over temperature?
At +52.5 mV/K, the Zener voltage increases by 52.5 mV per Kelvin rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this causes a +5.25 V shift - a +7.0 % deviation from 75 V. Designers must either thermally stabilize the diode or compensate in firmware/calibration for this drift.
Is this part qualified for automotive applications?
No. The BZX84-A75,215 is explicitly marked as non-automotive qualified in Nexperia's revision history (Rev. 7, January 2023). It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation. For automotive use, select Nexperia's BZX84-Q series or equivalent qualified alternatives.
BZX84-A75,215 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):
- 75 V
- Tolerance:
- ±1%
- Power - Max:
- 250 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-A75,215 FAQ
1.How can I place an order for BZX84-A75,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-A75,215 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-A75,215 reliable?
The price and inventory of BZX84-A75,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-A75,215 is usually 5 days.
3.What payment methods are accepted for BZX84-A75,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-A75,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-A75,215?
BZX84-A75,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-A75,215 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-A75,215?
For technical support, including BZX84-A75,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-A75,215 requirements.
6.How does Aetrix verify that BZX84-A75,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-A75,215 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-A75,215 meets industry standards.
7.What is the process for return or replacement of BZX84-A75,215?
All BZX84-A75,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-A75,215, 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-A75,215 part is unused and in its original packaging.
Return procedure for BZX84-A75,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-A75,215 Tags
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