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Nexperia USA Inc. BZX84-C47,235
- Part No.:
- BZX84-C47,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C47,235.pdf
- Description:
- DIODE ZENER 47V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:125
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Product details
Overview
BZX84-C47,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 47 V nominal breakdown voltage at 2 mA test current, 250 mW total power dissipation, and 150 °C maximum junction temperature - used for precision voltage reference and overvoltage protection in low-power analog supply rails.
For engineers reviewing the BZX84-C47,235 datasheet, BZX84-C47,235 pinout, BZX84-C47,235 application, or BZX84-C47,235 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (375 Ω max), reverse current at VR = 40 V (≤170 μA), thermal resistance (500 K/W junction-to-ambient), and non-repetitive peak reverse power capability (40 W).
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode-anode terminals when reverse-biased above its specified Zener voltage (VZ = 44.0–50.0 V). Its regulation relies on controlled avalanche breakdown rather than Zener tunneling, evidenced by positive temperature coefficient (+0.05 mV/K typical) and higher VZ range.
Designed for surface-mount use on FR4 PCBs with standard SOT23 footprint, it delivers stable reference performance under DC bias (IZ = 2 mA) and transient surge conditions (tp ≤ 100 μs, PZSM = 40 W), with thermal behavior governed by Rth(j-a) = 500 K/W and Rth(j-sp) = 330 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0 V to 50.0 V at IZ = 2 mA - defines regulated output voltage window under nominal bias |
| Tolerance | ±5 % - sets absolute accuracy band for voltage reference applications |
| Differential Resistance (rdif) | ≤375 Ω at IZ = 2 mA - determines load regulation error sensitivity to current variation |
| Reverse Current (IR) | ≤170 μA at VR = 40 V - quantifies leakage-induced error in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - limits continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp ≤ 100 μs - enables transient overvoltage clamping without failure |
| Junction Temperature (Tj) | −55 °C to +150 °C - defines operational envelope for industrial ambient conditions |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H), lead pitch 0.95 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; carries forward current during fault or startup |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating - no PCB trace or pad connection permitted |
| 3 | Cathode (K) | Connected to regulated voltage node; sinks Zener current to ground or return path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT package | SOT23 footprint enables high-density PCB layouts and automated assembly compatibility |
| Controlled Zener tolerance | ±5 % ensures predictable voltage setting for cost-sensitive reference and clamp circuits |
| Avalanche-mode operation | VZ ≥ 44 V confirms avalanche-dominated breakdown, delivering stable regulation with +0.05 mV/K TC |
| Transient surge resilience | 40 W non-repetitive peak power rating supports robust ESD and line-surge protection functions |
| Thermal performance | 500 K/W junction-to-ambient resistance allows 250 mW operation on standard single-sided FR4 |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 47 V reference for feedback divider in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output voltage setpoint via resistor divider network. Use Value: ±5 % VZ tolerance and 375 Ω rdif ensure <±1.2 % output voltage accuracy under 10 % load step changes. |
Use Scenario: Protecting microcontroller I/O pins against 48 V bus transients in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Passive clamping element diverting surge current away from sensitive input structures. Use Value: 40 W peak power rating and 150 °C Tj limit enable reliable suppression of 100 μs line surges without degradation. |
| Signal Level Translation | Current Source Bias |
Use Scenario: Generating fixed 47 V bias for photodiode transimpedance amplifier in optical sensor front-end. IC Role / Device Role / Timing Role: Low-noise voltage source stabilizing op-amp common-mode input level. Use Value: 170 μA IR at 40 V ensures <10 nA error current into high-impedance bias network. |
Use Scenario: Setting constant current through LED string in indicator panel using series resistor + Zener. IC Role / Device Role / Timing Role: Voltage reference defining current magnitude in simple two-component constant-current sink. Use Value: 250 mW Ptot supports up to 5.3 mA regulated current (47 V / 8.8 kΩ) with thermal margin on FR4. |
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 MMBZ47VC | Same 47 V nominal VZ, ±5 % tolerance, SOT23 package, but 300 mW Ptot and 350 Ω rdif max | Higher power rating supports 6.4 mA continuous current vs. 5.3 mA for BZX84-C47,235 | Select when >250 mW continuous dissipation is required; verify layout thermal relief matches ON's recommended pad size |
| Vishay BZX84-C47-TP | Identical VZ range (44–50 V), same ±5 % tolerance and SOT23 package, but 200 mW Ptot and 400 Ω rdif max | Lower power rating restricts use to sub-4.3 mA bias networks; tighter Cd = 40 pF aids HF filtering | Prefer where board space is constrained and RF noise filtering is critical; avoid in >4.3 mA DC applications |
Compared with MMBZ47VC and BZX84-C47-TP, the BZX84-C47,235 offers balanced trade-offs: mid-tier power (250 mW), moderate rdif (375 Ω), and industry-standard thermal resistance (500 K/W), making it optimal for general-purpose 47 V reference and clamp designs where neither extreme power nor ultra-low capacitance is mandatory.
Availability
BZX84-C47,235 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, programmable logic controller (PLC) I/O protection, and embedded power supply monitoring requiring stable component supply and long-term obsolescence management.
Supply support for BZX84-C47,235 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 headquartered in Nijmegen, Netherlands, specializing in high-volume production of essential semiconductors including logic, discretes, MOSFETs, and bipolar devices.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-effective voltage regulation and protection in consumer, industrial, and communication equipment with emphasis on SMT manufacturability and parametric consistency.
FAQ
What is the maximum continuous reverse current this diode can handle at 47 V?
The BZX84-C47,235 does not specify a maximum continuous reverse current at 47 V; instead, its safe operating limit is defined by total power dissipation. At 47 V, the maximum continuous Zener current is 5.3 mA (250 mW ÷ 47 V), assuming Tamb ≤ 25 °C and standard FR4 mounting. Derating is required above 25 °C per Rth(j-a) = 500 K/W.
Can this part replace a BZX84-B47 in an existing design?
No - BZX84-C47,235 has ±5 % tolerance (44–50 V), while BZX84-B47 has ±2 % (46.1–47.9 V). Substituting introduces up to ±3 % additional voltage uncertainty and may degrade regulation accuracy in tight-tolerance feedback loops. Verify system-level VZ margin before replacement.
Is Pin 2 truly unused, or does it serve a mechanical function?
Pin 2 is electrically not connected (n.c.) per Table 2 and must remain unconnected in circuit design. It serves only as a mechanical lead for package integrity and alignment during SMT placement; routing traces or applying solder paste to Pin 2 violates Nexperia's mounting recommendations and risks thermal stress or solder bridging.
How does temperature affect regulation accuracy at 47 V?
At 47 V, the BZX84-C47,235 exhibits a typical temperature coefficient of +0.05 mV/K. Over a −40 °C to +125 °C junction temperature range, this causes a +8.25 mV drift (165 K × 0.05 mV/K), or ±0.017 % of 47 V - negligible for most industrial references but relevant in precision metrology-grade designs.
BZX84-C47,235 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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-C47,235 FAQ
1.How can I place an order for BZX84-C47,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C47,235 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-C47,235 reliable?
The price and inventory of BZX84-C47,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C47,235 is usually 5 days.
3.What payment methods are accepted for BZX84-C47,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C47,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C47,235?
BZX84-C47,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C47,235 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-C47,235?
For technical support, including BZX84-C47,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C47,235 requirements.
6.How does Aetrix verify that BZX84-C47,235 is sourced from the original manufacturer or authorized distributors?
All BZX84-C47,235 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-C47,235 meets industry standards.
7.What is the process for return or replacement of BZX84-C47,235?
All BZX84-C47,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C47,235, 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-C47,235 part is unused and in its original packaging.
Return procedure for BZX84-C47,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C47,235 Tags
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