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NXP Semiconductors BZX84-C27/LF1R
- Part No.:
- BZX84-C27/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C27/LF1R.pdf
- Description:
- DIODE ZENER 27V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,129
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Product details
Overview
BZX84-C27/LF1R from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 27 V nominal breakdown voltage at 2 mA, 250 mW total power dissipation, and AEC-Q101 qualified for automotive use.
For engineers reviewing the BZX84-C27/LF1R datasheet, BZX84-C27/LF1R pinout, BZX84-C27/LF1R application, or BZX84-C27/LF1R equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade reliability, and real-world regulation use cases - all aligned to NXP's Rev. 6 product data sheet dated 6 March 2014.
Technical Context
The BZX84-C27/LF1R operates as a passive two-terminal voltage reference, maintaining stable reverse-biased conduction above its 27 V Zener voltage with typical differential resistance of 65 Ω at IZ = 2 mA. Its temperature coefficient is +18.9 mV/K, indicating positive drift with junction temperature rise.
Designed for low-power regulation and overvoltage protection, it supports non-repetitive peak reverse currents up to 1.0 A (100 µs pulse), exhibits ≤0.05 µA reverse leakage at 20.3 V, and achieves 50 pF capacitance at 1 MHz and 0 V bias - enabling stable performance in signal-level clamping and reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1 V to 28.9 V at IZ = 2 mA - defines usable regulation window under standard test conditions |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on FR4 PCB |
| Differential Resistance (rdif) | 65 Ω typical at IZ = 2 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Leakage Current (IR) | ≤0.05 µA at VR = 20.3 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A for 100 µs pulse - enables transient overvoltage suppression without device failure |
| Thermal Resistance (Rth(j-a)) | 500 K/W in free air - informs derating requirements for ambient temperature operation |
| AEC-Q101 Qualified | Validated for automotive applications per Stress Test Qualification for Discrete Semiconductors |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mounted plastic package with 2.8 mm × 1.4 mm footprint, 0.95 mm height, and standard 4 mm tape pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection - must remain unconnected on PCB |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential node and serves as regulation output reference |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-optimized regulation where tight voltage accuracy is not required, e.g., supply rail monitoring |
| AEC-Q101 qualification | Confirms suitability for automotive body electronics, infotainment power supplies, and engine control module interfaces |
| 250 mW power rating in SOT23 | Supports compact board layouts while delivering sufficient headroom for 27 V reference and clamping tasks |
| Low 50 pF junction capacitance | Minimizes signal distortion in high-frequency clamp or waveform shaping applications up to ~10 MHz |
| 1.0 A non-repetitive surge capability | Provides robust ESD and load-dump transient immunity without external series limiting resistors in many cases |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Reference |
|---|---|
|
Use Scenario: Clamping 24 V vehicle battery rail against load dump transients in body control modules. IC Role / Device Role / Timing Role: Passive voltage clamp placed between rail and ground, conducting only during overvoltage events. Use Value: Limits peak voltage to ≤28.9 V using inherent Zener breakdown, eliminating need for active TVS in cost-sensitive nodes. |
Use Scenario: Providing stable 27 V reference for analog front-end circuitry in pressure or temperature sensor signal conditioning. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing precise bias point for op-amp input stages. Use Value: Delivers <0.05 µA leakage at 20.3 V, minimizing error in high-impedance sensor bridge interfaces. |
| Consumer Device Overvoltage Protection | Telecom Line Interface Clamp |
|
Use Scenario: Protecting USB-C PD negotiation ICs from accidental 27 V misconnection in multi-rail portable chargers. IC Role / Device Role / Timing Role: Standby-mode shunt protector activated only when input exceeds 25.1 V threshold. Use Value: 65 Ω differential resistance ensures predictable clamping voltage rise under fault current, preventing latch-up. |
Use Scenario: Suppressing induced surges on RS-485 bus lines exposed to industrial EMI environments. IC Role / Device Role / Timing Role: Bidirectional clamp (with companion diode) limiting common-mode transients to safe levels. Use Value: 1.0 A non-repetitive peak current rating handles 100 µs line surges per IEC 61000-4-5 Level 3 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5256BS-7-F (Diodes Inc.) | 27 V nominal, ±5 %, SOT23, 200 mW Ptot, 100 Ω rdif at 20 mA | Higher differential resistance and lower power rating reduce regulation precision and surge margin | Select when legacy Diodes Inc. sourcing is mandated and 200 mW rating suffices |
| BZX84-C27-7-F (Diodes Inc.) | 27 V nominal, ±5 %, SOT23, 300 mW Ptot, 60 Ω rdif at 5 mA, same pinout | Higher power rating and tighter rdif improve thermal margin and regulation stability under varying loads | Preferred for new designs requiring extended power headroom or improved dynamic response |
Compared with BZX84-C27/LF1R, MMBZ5256BS-7-F offers identical voltage grade but reduced power and higher impedance, while BZX84-C27-7-F provides superior power handling and lower dynamic resistance - both require validation of thermal layout and transient response in target application.
Availability
BZX84-C27/LF1R is available at Aetrix Electronics and suitable for automotive power rail clamp, industrial sensor reference, consumer device overvoltage protection, and telecom line interface clamp applications requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-C27/LF1R 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The BZX84 series was designed as a family of standardized, AEC-Q101 qualified Zener diodes targeting cost-effective voltage regulation and transient protection in space-constrained automotive and industrial PCBs.
FAQ
What is the Zener voltage tolerance of BZX84-C27/LF1R?
The BZX84-C27/LF1R has a nominal Zener voltage of 27 V with a tolerance of approximately ±5 %, meaning its actual breakdown voltage falls between 25.1 V and 28.9 V when tested at 2 mA. This tolerance aligns with the "C" series designation in the BZX84 family and is specified in Table 9 of the NXP Rev. 6 datasheet. The BZX84-C27/LF1R maintains this range across its qualified operating temperature span.
Is BZX84-C27/LF1R suitable for automotive applications?
Yes, BZX84-C27/LF1R is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, confirming its reliability for automotive use including body electronics, infotainment power rails, and engine control interface protection. It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and is rated for operation from −65 °C to +150 °C junction temperature - making BZX84-C27/LF1R appropriate for under-hood and cabin-mounted systems.
What is the maximum non-repetitive peak reverse current for BZX84-C27/LF1R?
The BZX84-C27/LF1R supports a non-repetitive peak reverse current (IZSM) of 1.0 A for pulse durations ≤100 µs, as specified in Table 9 of the NXP datasheet. This rating applies under defined surge conditions (square wave, Tj = 25 °C before surge) and enables BZX84-C27/LF1R to absorb transient energy in load-dump or ESD events without permanent damage - provided proper PCB thermal design is implemented.
How does the differential resistance of BZX84-C27/LF1R affect regulation accuracy?
The BZX84-C27/LF1R has a typical differential resistance (rdif) of 65 Ω at IZ = 2 mA, meaning a 1 mA change in Zener current causes ~65 mV shift in regulated voltage. This value directly impacts regulation stability under varying load or supply conditions. Lower rdif improves accuracy; BZX84-C27/LF1R's 65 Ω enables acceptable performance in moderate-precision applications like rail monitoring, but high-accuracy references require tighter-tolerance or lower-rdif alternatives.
What is the pin configuration of BZX84-C27/LF1R in the SOT23 package?
The BZX84-C27/LF1R uses a 3-pin SOT23 (TO-236AB) package with Pin 1 = Anode (A), Pin 2 = Not Connected (n.c.), and Pin 3 = Cathode (K), as confirmed in Table 2 of the NXP datasheet. Pin 2 is internally unconnected and must remain floating on the PCB layout. Correct orientation ensures proper reverse-bias operation - cathode connects to the higher-potential node, anode to lower potential or ground - critical for reliable function of BZX84-C27/LF1R in regulation circuits.
BZX84-C27/LF1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (TO-236AB)
BZX84-C27/LF1R FAQ
1.How can I place an order for BZX84-C27/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C27/LF1R 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-C27/LF1R reliable?
The price and inventory of BZX84-C27/LF1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C27/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-C27/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C27/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C27/LF1R?
BZX84-C27/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C27/LF1R 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-C27/LF1R?
For technical support, including BZX84-C27/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C27/LF1R requirements.
6.How does Aetrix verify that BZX84-C27/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-C27/LF1R 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-C27/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-C27/LF1R?
All BZX84-C27/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C27/LF1R, 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-C27/LF1R part is unused and in its original packaging.
Return procedure for BZX84-C27/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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