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NXP Semiconductors BZX284-C27,135
- Part No.:
- BZX284-C27,135
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-C27,135.pdf
- Description:
- DIODE ZENER 27V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:4,447
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Product details
Overview
BZX284-C27,135 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 27 V nominal working voltage at 2 mA test current, 400 mW total power dissipation, and 1.0 A non-repetitive peak reverse current. It serves as a precision low-power voltage reference in power supply feedback paths, overvoltage protection circuits, and biasing networks for analog front-ends.
For engineers reviewing the BZX284-C27,135 datasheet, BZX284-C27,135 pinout, BZX284-C27,135 application, or BZX284-C27,135 equivalent, this page delivers verified electrical parameters, thermal resistance (315 K/W), differential resistance (35–250 Ω), temperature coefficient (8 mV/K), and SOD110 package dimensions - all confirmed from NXP's 2002 production data sheet.
Technical Context
The BZX284-C27,135 operates as a two-terminal silicon Zener diode optimized for stable reverse-bias regulation. Its junction temperature range spans −65 °C to +150 °C, with thermal resistance from junction-to-ambient fixed at 315 K/W when mounted on a 11 × 25 × 1.6 mm PCB per IEC 60134 limiting values.
Regulation performance is defined at 2 mA test current (IZtest), where it achieves 26.5–27.5 V nominal Zener voltage (±5%), 35 Ω typical differential resistance, and +8 mV/K temperature coefficient - confirming positive TC behavior suitable for temperature-compensated reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.5–27.5 V at IZ = 2 mA; defines stable regulation point for low-current reference applications. |
| Differential Resistance (rdif) | 35 Ω (typ), 250 Ω (max) at IZ = 2 mA; determines output impedance and load regulation sensitivity. |
| Temperature Coefficient (SZ) | +8 mV/K (typ) at IZ = 2 mA; enables predictable voltage drift compensation in wide-temperature environments. |
| Total Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C; sets maximum continuous DC power handling without derating. |
| Reverse Current (IR) | 50 nA max at VR = 0.7 × VZnom; ensures low leakage in high-impedance bias networks. |
| Non-repetitive Peak Reverse Current (IZSM) | 1.0 A at tp = 100 μs; supports transient overvoltage clamping in surge protection circuits. |
| Junction-to-Ambient Thermal Resistance (Rth j-a) | 315 K/W on specified PCB; governs allowable ambient temperature rise under full power. |
Pinout & Package
SOD110 is a very small ceramic rectangular surface-mounted package with cathode identification mark on top surface. Dimensions: 2.10 × 1.40 × 1.60 mm (L × W × H), with 0.1 mm maximum lead protrusion (y).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (1) | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulation topology. |
| Cathode (2) | Zener breakdown terminal / regulated output node | Connected to input voltage source and load; maintains stable 27 V across load during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective selection for non-critical reference applications without trimming circuitry. |
| 400 mW power rating in SOD110 | Delivers higher power density than standard SOD-323 Zeners, supporting wider current ranges in compact layouts. |
| Low 50 nA reverse leakage at 0.7×VZ | Minimizes quiescent current error in high-impedance voltage divider or op-amp reference circuits. |
| Positive temperature coefficient (+8 mV/K) | Allows pairing with negative-TC components (e.g., transistors) to achieve near-zero net TC references. |
| Ceramic SMD construction (SOD110) | Provides superior moisture resistance and long-term stability vs. plastic-packaged Zeners in humid environments. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Regulating output voltage of isolated flyback or buck converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference connected between secondary-side error amplifier input and ground. Use Value: Maintains ±5% output accuracy across line/load/temperature with <50 nA leakage-induced offset. |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive switching transients. IC Role / Device Role / Timing Role: Low-capacitance (73 pF) clamp placed between signal line and ground. Use Value: Limits voltage to 27 V within 100 µs surge window while dissipating up to 1.0 A peak current. |
| ADC Reference Bias Network | Current Source Setpoint |
|
Use Scenario: Providing stable bias voltage for precision ADC voltage reference buffer stage. IC Role / Device Role / Timing Role: Zener-based reference node driving op-amp non-inverting input. Use Value: Delivers 27 V reference with +8 mV/K TC, enabling predictable drift compensation in industrial sensors. |
Use Scenario: Setting gate voltage for constant-current LED driver using MOSFET source degeneration. IC Role / Device Role / Timing Role: Zener-connected between MOSFET gate and source to fix VGS. Use Value: Ensures stable current setpoint despite supply variation, leveraging 35 Ω differential resistance for low sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage regulator diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C27 | Same SOD-123 package, ±5% tolerance, 27 V nominal, but higher 500 mW Ptot and 600 Ω max rdif. | Higher power rating suits higher-current clamping; higher rdif reduces regulation precision. | Select BZT52-C27 only if >400 mW dissipation or SOD-123 footprint compatibility is required. |
| Vishay BZX84-C27 | SOD-323 package, ±5% tolerance, 27 V nominal, 300 mW Ptot, 100 Ω max rdif, 150 °C Tj max. | Smaller footprint and lower power suit space-constrained portable designs; reduced thermal margin. | Choose BZX84-C27 when board area is critical and peak power remains below 300 mW. |
Compared with BZX284-C27,135, BZT52-C27 offers higher power headroom but looser regulation due to higher rdif, while BZX84-C27 trades thermal robustness and regulation stability for miniaturization - making the BZX284-C27,135 optimal for industrial-grade 27 V references requiring ceramic reliability and 315 K/W thermal control.
Availability
BZX284-C27,135 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision biasing applications requiring stable component supply, long-term parametric consistency, and ceramic-package reliability.
Supply support for BZX284-C27,135 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 consumer markets.
The BZX284 series was designed for low-power, high-stability voltage regulation in space-constrained SMD applications - emphasizing ceramic reliability, tight tolerance options, and predictable TC behavior across extended temperature ranges.
FAQ
What is the Zener voltage tolerance of the BZX284-C27,135?
The BZX284-C27,135 has a ±5% Zener voltage tolerance, meaning its nominal 27 V regulation point falls between 25.65 V and 28.35 V at 2 mA test current. This tolerance is confirmed in Table 2 of the NXP 2002 product data sheet and applies specifically to the 'C' series variant of the BZX284-C27,135.
What package type does the BZX284-C27,135 use?
The BZX284-C27,135 uses the SOD110 package: a very small ceramic rectangular surface-mount device measuring 2.10 × 1.40 × 1.60 mm, with cathode identification marked on the top surface. This is explicitly defined in the "PACKAGE OUTLINE" section (page 8) of the NXP datasheet.
What is the maximum non-repetitive peak reverse current for the BZX284-C27,135?
The BZX284-C27,135 supports a maximum non-repetitive peak reverse current (IZSM) of 1.0 A at pulse width tp = 100 μs and ambient temperature of 25 °C, as specified in Table 2 of the NXP datasheet. This value enables short-duration transient suppression without device failure.
How does the temperature coefficient of the BZX284-C27,135 affect its regulation stability?
The BZX284-C27,135 exhibits a +8 mV/K typical temperature coefficient at 2 mA test current, indicating its Zener voltage increases predictably with junction temperature. This positive TC allows designers to compensate drift by combining it with negative-TC elements, improving overall reference stability in the BZX284-C27,135-based circuits.
Is the BZX284-C27,135 suitable for use in high-humidity environments?
Yes - the BZX284-C27,135 uses a ceramic SOD110 package, which provides superior moisture resistance compared to plastic-packaged Zener diodes. NXP's datasheet highlights this construction as part of the device's long-term stability profile, making the BZX284-C27,135 appropriate for industrial and outdoor applications exposed to humidity.
BZX284-C27,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-110
BZX284-C27,135 FAQ
1.How can I place an order for BZX284-C27,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-C27,135 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 BZX284-C27,135 reliable?
The price and inventory of BZX284-C27,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-C27,135 is usually 5 days.
3.What payment methods are accepted for BZX284-C27,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-C27,135 transactions.
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4.How is shipping managed for BZX284-C27,135?
BZX284-C27,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-C27,135 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 BZX284-C27,135?
For technical support, including BZX284-C27,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-C27,135 requirements.
6.How does Aetrix verify that BZX284-C27,135 is sourced from the original manufacturer or authorized distributors?
All BZX284-C27,135 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 BZX284-C27,135 meets industry standards.
7.What is the process for return or replacement of BZX284-C27,135?
All BZX284-C27,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-C27,135, 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 BZX284-C27,135 part is unused and in its original packaging.
Return procedure for BZX284-C27,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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