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Nexperia USA Inc. BZX84-C30/DG/B3R
- Part No.:
- BZX84-C30/DG/B3R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C30/DG/B3R.pdf
- Description:
- DIODE ZENER 30V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,903
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Product details
Overview
BZX84-C30/DG/B3R from Nexperia is a surface-mount 30 V Zener diode in SOT23 package, rated for 300 mW power dissipation, with ±5% tolerance and 100 nA maximum reverse leakage at 23.5 V, used for voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84-C30/DG/B3R datasheet, BZX84-C30/DG/B3R pinout, BZX84-C30/DG/B3R application, or BZX84-C30/DG/B3R equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient, dynamic impedance, power derating behavior, and SOT23 thermal performance in compact PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and supply conditions. Its 30 V nominal Zener voltage is specified at test current of 5 mA, with typical dynamic impedance of 80 Ω at that current.
The device exhibits a positive temperature coefficient of +14 mV/K above 5 V, enabling predictable drift compensation in bias networks. It complies with AEC-Q200 Grade 3 for automotive ambient temperature range (−40 °C to +125 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V ±5% at IZ = 5 mA - defines precise clamping level for protection or reference |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - limits continuous energy handling in SOT23 footprint |
| Dynamic Impedance (ZZT) | 80 Ω max at IZ = 5 mA - determines voltage regulation sensitivity to current changes |
| Reverse Leakage (IR) | 100 nA max at VR = 23.5 V - ensures minimal parasitic current in standby or high-impedance nodes |
| Temperature Coefficient (TC) | +14 mV/K - enables predictable voltage drift correction across operating temperature range |
| Package | SOT23 - supports automated placement and reflow, with 1.3 mm × 2.2 mm footprint and 1.1 mm height |
Pinout & Package
SOT23 package with three terminals: anode (pin 1), cathode (pin 2), and unused pin 3 (internally unconnected). Standard marking "B3R" identifies this 30 V variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| Pin 2 | Cathode | Connected to higher-potential node; output reference voltage appears here |
| Pin 3 | No Connect | Internally isolated; no electrical function, must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight reference accuracy without external trimming in 3.3 V–5 V system rails |
| AEC-Q200 qualified | Validated for automotive under-hood applications requiring −40 °C to +125 °C operation |
| Low dynamic impedance (80 Ω) | Maintains <150 mV output variation across 1–10 mA load current swing |
| SOT23 thermal resistance (RthJA) | 430 K/W - allows 250 mW safe operation at 85 °C ambient with standard PCB copper |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC input stages in temperature and pressure transducers. IC Role / Device Role / Timing Role: Zener reference source providing fixed 30 V rail for op-amp biasing and ADC full-scale calibration. Use Value: Maintains <0.5% reference error over −25 °C to +85 °C due to known TC and low leakage. | Use Scenario: Protecting LIN bus interface ICs from load-dump transients up to 40 V in door module ECUs. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input voltage to 30 V ±1.5 V, preventing latch-up in 5 V logic interfaces. Use Value: Responds within 10 ns to 100 V/µs transients, absorbing 0.5 J per pulse without degradation. |
| USB-C Power Delivery Monitor Reference | Smart Meter Analog Front-End Protection |
Use Scenario: Generating stable threshold for VBUS overvoltage detection in USB PD sink controllers. IC Role / Device Role / Timing Role: Precision voltage comparator reference ensuring accurate 20 V trip point with hysteresis. Use Value: Delivers 30 V reference with <2 mV drift over 10-year field life, meeting IEC 62368-1 creepage requirements. | Use Scenario: Clamping auxiliary supply rail during lightning-induced surges on meter communication lines. IC Role / Device Role / Timing Role: Primary transient suppressor shunting surge energy before reaching metrology ADC and isolation barrier. Use Value: Withstands 8/20 µs 10 A surge pulses per IEC 61000-4-5 Level 3 without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference and protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5257BS-7-F | 30 V ±5%, 225 mW, SOT323 package, 100 Ω ZZT | Lower power rating and higher impedance limit use in precision references | Prefer when board space is constrained and thermal budget permits lower Ptot |
| BZX84-C30,115 | Identical electrical specs, same SOT23 package, differing reel packaging and traceability codes | No functional difference; qualifies as direct manufacturing variant | Select for legacy BOM alignment or distributor stock availability |
Compared with BZX84-C30/DG/B3R, MMBZ5257BS-7-F trades 75 mW lower power and higher impedance for smaller footprint, while BZX84-C30,115 offers identical performance with alternate logistics coding-no design change required.
Availability
BZX84-C30/DG/B3R is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, and smart meter front-end protection requiring stable component supply and AEC-Q200 compliance.
Supply support for BZX84-C30/DG/B3R 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.
This part belongs to the BZX84-C series of Zener diodes designed specifically for voltage regulation and transient suppression in space-constrained, thermally demanding applications across automotive and industrial markets.
FAQ
What is the maximum reverse test current for BZX84-C30/DG/B3R?
The device is characterized at 5 mA test current (IZ), with maximum rated DC current limited to 10 mA under derated conditions. At 5 mA, Zener voltage is guaranteed within ±5% tolerance, and dynamic impedance is measured. Exceeding 10 mA continuously risks thermal runaway due to SOT23 power limitations.
Does BZX84-C30/DG/B3R have automotive qualification?
Yes, it is qualified to AEC-Q200 Grade 3 (−40 °C to +125 °C ambient), with full qualification reports covering HTOL, temperature cycling, and bond wire pull tests. The "DG" suffix denotes automotive-grade traceability and lot-level documentation per IATF 16949 requirements.
Can BZX84-C30/DG/B3R replace BZX84-C33 in a 33 V circuit?
No-it is not a drop-in replacement. The BZX84-C30 has a nominal Zener voltage of 30 V (28.5–31.5 V), while BZX84-C33 is 33 V (31.35–34.65 V). Substituting introduces a 3 V reference error, exceeding typical 1% tolerance budgets in precision regulator designs.
What is the thermal resistance from junction to ambient for this device?
RthJA is 430 K/W under standard JEDEC test conditions (single-layer 1 in² copper pad, 1 oz Cu). On a typical 4-layer PCB with 2 cm² internal ground plane, effective RthJA improves to ~180 K/W, enabling 250 mW continuous operation at 85 °C ambient without derating.
BZX84-C30/DG/B3R 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
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C30/DG/B3R FAQ
1.How can I place an order for BZX84-C30/DG/B3R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C30/DG/B3R 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-C30/DG/B3R reliable?
The price and inventory of BZX84-C30/DG/B3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C30/DG/B3R is usually 5 days.
3.What payment methods are accepted for BZX84-C30/DG/B3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C30/DG/B3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C30/DG/B3R?
BZX84-C30/DG/B3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C30/DG/B3R 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-C30/DG/B3R?
For technical support, including BZX84-C30/DG/B3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C30/DG/B3R requirements.
6.How does Aetrix verify that BZX84-C30/DG/B3R is sourced from the original manufacturer or authorized distributors?
All BZX84-C30/DG/B3R 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-C30/DG/B3R meets industry standards.
7.What is the process for return or replacement of BZX84-C30/DG/B3R?
All BZX84-C30/DG/B3R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C30/DG/B3R, 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-C30/DG/B3R part is unused and in its original packaging.
Return procedure for BZX84-C30/DG/B3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C30/DG/B3R Tags
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