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NXP Semiconductors BZX84-B2V7/LF1R
- Part No.:
- BZX84-B2V7/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B2V7/LF1R.pdf
- Description:
- DIODE ZENER 2.7V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,451
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Product details
Overview
BZX84-B2V7/LF1R from NXP Semiconductors is a ±2 % tolerance Zener diode in SOT23 package, rated for 2.65 V to 2.75 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides stable low-voltage regulation in space-constrained PCB designs such as sensor biasing and microcontroller reset circuitry.
For engineers reviewing the BZX84-B2V7/LF1R datasheet, BZX84-B2V7/LF1R pinout, BZX84-B2V7/LF1R application, or BZX84-B2V7/LF1R equivalent, key selection criteria include its 2.7 V Zener voltage tolerance, thermal resistance (Rth(j-a) = 500 K/W), non-repetitive peak reverse power (40 W), junction temperature range (−65 °C to +150 °C), and SOT23 footprint compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage across load circuits. Its Zener mechanism delivers predictable regulation with differential resistance of 300 Ω (typ) at 5 mA and temperature coefficient of −3.5 mV/K to −2.0 mV/K.
Designed for surface-mount implementation on FR4 PCBs with single-sided copper, it supports pulse operation up to 100 µs and complies with IEC 60134 absolute maximum ratings. The anode–cathode configuration enables simple integration into shunt regulator topologies without external bias components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.65 V to 2.75 V at IZ = 5 mA - defines precise clamping threshold for 2.7 V rail stabilization |
| Tolerance | ±2 % - ensures tight voltage control versus ±5 % (BZX84-C) or ±1 % (BZX84-A) variants |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - limits continuous DC current to ~92 mA at 2.7 V without derating |
| Differential Resistance | 300 Ω (typ) at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Non-repetitive Peak Reverse Power | 40 W - supports transient surge suppression up to 100 µs pulses without failure |
| Junction Temperature Range | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability per stress test qualification for discrete semiconductors |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead plastic surface-mounted package with 2.8 mm × 1.4 mm footprint and 0.95 mm height. Standardized for high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected on PCB |
| 3 | Cathode (K) | Reverse-biased terminal; connects to regulated voltage node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOT23 packaging | Enables placement in dense layouts with 2.8 mm × 1.4 mm board area and 0.95 mm max height |
| ±2 % Zener voltage tolerance | Provides tighter regulation than ±5 % variants while maintaining cost advantage over ±1 % grade |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules and body electronics |
| Thermal resistance Rth(j-a) | 500 K/W in free air - informs heatsinking requirements and ambient temperature derating curves |
| Non-repetitive peak reverse current | 6.0 A at 100 µs pulse - supports ESD and load-dump transient suppression in 12 V systems |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 2.7 V reference to analog front-end of temperature or pressure sensors in engine bay. IC Role / Device Role / Timing Role: Shunt voltage reference diode regulating sensor supply rail against battery fluctuations. Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient with <±2 % voltage drift, enabled by AEC-Q101 qualification and −3.5 to −2.0 mV/K tempco. |
Use Scenario: Generating clean power-on reset signal for 3.3 V microcontrollers during cold cranking (6–9 V battery). IC Role / Device Role / Timing Role: Zener-clamped RC network defining reset assertion time and voltage threshold. Use Value: Ensures reliable reset activation below 2.5 V with 300 Ω dynamic impedance minimizing threshold hysteresis. |
| Industrial I/O Protection | Low-Power Reference Source |
Use Scenario: Clamping induced transients on 24 V industrial fieldbus lines interfacing with 3.3 V logic. IC Role / Device Role / Timing Role: Secondary shunt protection element absorbing fast spikes after primary TVS. Use Value: Handles 40 W non-repetitive surges (100 µs) without degradation, complementing primary protection with precise 2.7 V clamping. |
Use Scenario: Supplying reference voltage to ultra-low-power ADCs in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Passive voltage reference establishing measurement baseline for 12-bit conversion. Use Value: Delivers 2.7 V ±2 % stability at 10 µA quiescent current, enabling <1 LSB error contribution over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F (Diodes Inc.) | 2.4 V nominal, ±5 % tolerance, 200 mW Ptot, SOT23 package | Lower voltage and wider tolerance; suitable where 2.4 V clamping suffices and tighter regulation is unnecessary | Select when cost sensitivity outweighs precision; verify 2.4 V threshold meets system reset or bias requirements |
| BZX84-C2V7 (NXP) | Same 2.7 V nominal rating but ±5 % tolerance and higher differential resistance (600 Ω typ) | Acceptable for non-critical biasing where voltage drift up to ±0.14 V is tolerable | Choose for legacy designs requiring same family footprint but relaxed spec compliance; avoid in AEC-Q101-mandated systems |
Compared with BZX84-B2V7/LF1R, MMBZ5221BS-7-F offers lower cost but sacrifices 0.3 V headroom and regulation precision, while BZX84-C2V7 retains identical form factor but trades ±2 % accuracy and AEC-Q101 qualification for broader tolerance and reduced surge capability.
Availability
BZX84-B2V7/LF1R is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset circuits, industrial I/O protection, and low-power reference source applications requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-B2V7/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 belongs to NXP's portfolio of general-purpose Zener diodes engineered for reliable voltage regulation in cost-sensitive, high-volume applications-particularly where AEC-Q101 qualification and SOT23 scalability are required.
FAQ
What is the exact Zener voltage range for BZX84-B2V7/LF1R at 5 mA test current?
The BZX84-B2V7/LF1R exhibits a guaranteed Zener voltage range of 2.65 V to 2.75 V when measured at IZ = 5 mA and Tj = 25 °C. This ±2 % tolerance band is specified in Table 8 of the NXP datasheet Rev. 6 and distinguishes it from the ±1 % (BZX84-A) and ±5 % (BZX84-C) variants within the same family. The BZX84-B2V7/LF1R maintains this specification across its qualified operating temperature range.
Is BZX84-B2V7/LF1R suitable for automotive applications?
Yes, BZX84-B2V7/LF1R is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its junction temperature range (−65 °C to +150 °C), thermal resistance (500 K/W), and surge capability (40 W, 100 µs) meet automotive environmental and reliability requirements. BZX84-B2V7/LF1R is not intended for safety-critical life-support systems.
What is the function of Pin 2 on the BZX84-B2V7/LF1R SOT23 package?
Pin 2 of the BZX84-B2V7/LF1R is internally not connected (n.c.), as confirmed in Table 2 "Pinning" of the NXP datasheet. It corresponds to the center lead of the SOT23 outline and must remain unconnected on the PCB layout. Routing or soldering to Pin 2 may compromise thermal performance or cause unintended leakage paths, as the die pad has no electrical bond to the semiconductor junction.
How does the temperature coefficient of BZX84-B2V7/LF1R affect its regulation stability?
The BZX84-B2V7/LF1R has a temperature coefficient (SZ) ranging from −3.5 mV/K to −2.0 mV/K, meaning its Zener voltage decreases by 2.0–3.5 mV per Kelvin rise in junction temperature. At 2.7 V nominal, this translates to approximately −0.074 %/°C to −0.130 %/°C drift. Designers must account for this negative tempco in high-temperature environments, especially when used in precision references or reset circuits where voltage margin is constrained.
Can BZX84-B2V7/LF1R replace BZX84-A2V7 in an existing design?
BZX84-B2V7/LF1R can replace BZX84-A2V7 only if ±2 % tolerance is acceptable in place of ±1 %. Both share identical SOT23 package, pinout, and thermal characteristics, but BZX84-A2V7 specifies 2.67–2.73 V (tighter 2.7 V band), whereas BZX84-B2V7/LF1R allows 2.65–2.75 V. No PCB changes are needed, but system-level validation is required to confirm that the wider voltage window does not impact reset timing, sensor accuracy, or power-rail stability in the target application. BZX84-B2V7/LF1R retains AEC-Q101 qualification like the A-grade part.
BZX84-B2V7/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):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 20 µA @ 1 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-B2V7/LF1R FAQ
1.How can I place an order for BZX84-B2V7/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B2V7/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-B2V7/LF1R reliable?
The price and inventory of BZX84-B2V7/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-B2V7/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-B2V7/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B2V7/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B2V7/LF1R?
BZX84-B2V7/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B2V7/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-B2V7/LF1R?
For technical support, including BZX84-B2V7/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B2V7/LF1R requirements.
6.How does Aetrix verify that BZX84-B2V7/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-B2V7/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-B2V7/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-B2V7/LF1R?
All BZX84-B2V7/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B2V7/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-B2V7/LF1R part is unused and in its original packaging.
Return procedure for BZX84-B2V7/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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