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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZT52-C27J

Name: BZT52-C27J
Brand: Nexperia USA Inc.
SKU: BZT52-C27J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52-C27J

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: BZT52-C27J.pdf

Description:: DIODE ZENER 27V 350MW SOD123

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BZT52-C27J from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 27 V nominal Zener voltage at I_Z = 2 mA, 50 Ω maximum differential resistance, and 590 mW total power dissipation at T_amb ≤ 25 °C; used for precision voltage reference and overvoltage clamping in low-power sensor signal conditioning circuits.

For engineers reviewing the BZT52-C27J datasheet, BZT52-C27J pinout, BZT52-C27J application, or BZT52-C27J equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_th(j-sp) = 210 K/W), reverse current at 24.3 V (≤0.05 μA), temperature coefficient (±0.05 mV/K), and SOD123 footprint compatibility with automated SMT assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its design centers on low dynamic impedance (50 Ω max) and tight voltage regulation (25.1–28.9 V range) at low test current (2 mA), enabling accurate biasing in analog front-ends.

The device exhibits a near-zero temperature coefficient (±0.05 mV/K at I_Z = 5 mA), minimizing drift over industrial temperature range (−55 °C to +150 °C), and features low junction-to-solder-point thermal resistance (210 K/W) for reliable power handling on standard FR4 PCBs.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	25.1 V min to 28.9 V max at I_Z = 2 mA - defines regulated output range for reference or clamp function
Differential Resistance r_dif	50 Ω max - ensures minimal voltage shift under load current variation
Reverse Current I_R	≤ 0.05 μA at V_R = 24.3 V - guarantees low leakage before breakdown onset
Total Power Dissipation P_tot	590 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB
Thermal Resistance R_th(j-sp)	210 K/W - determines junction temperature rise above solder point under steady-state operation
Forward Voltage V_F	0.9 V max at I_F = 10 mA - defines conduction loss when used in forward-biased protection paths
Junction Temperature T_j	150 °C max - limits operating envelope for long-term reliability in sealed enclosures

Pinout & Package

SOD123 surface-mount plastic package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.75 mm × 1.7 mm × 1.3 mm (L × W × H); optimized for reflow soldering on 0.91 mm pad width footprint.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation
2	Anode (A)	Connected to ground or lower-potential rail; reverse-biased configuration enables Zener action

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective voltage referencing where tighter tolerance is not required, e.g., non-critical supply monitoring
Low differential resistance (50 Ω max)	Maintains <±10 mV regulation error across ±0.5 mA load current change in feedback loops
Zero-TC operating point (±0.05 mV/K)	Minimizes voltage drift over −40 °C to +85 °C ambient range without external compensation
SOD123 package with 210 K/W R_th(j-sp)	Supports 350 mW derated power at 70 °C ambient on standard FR4, simplifying thermal layout
Non-repetitive peak reverse current I_ZSM = 1.0 A	Withstands transient surges up to 100 μs duration without degradation in ESD protection paths

Applications

Industrial Sensor Reference

USB Port Overvoltage Clamp

Use Scenario: Providing stable 27 V reference for 24 V industrial pressure transducer excitation circuit.

IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage regulator, absorbing excess current to hold excitation rail within ±0.5 % of target.

Use Value: Enables 12-bit ADC linearity by limiting reference drift to <0.02 %/°C across −25 °C to +70 °C operating range.

Use Scenario: Clamping USB VBUS line against 30 V surge events during hot-plug insertion.

IC Role / Device Role / Timing Role: Acts as fast-acting crowbar element, conducting above 28.9 V to divert surge energy to ground.

Use Value: Limits transient overshoot to <31 V for <100 μs, protecting downstream USB controller ICs rated to 33 V absolute max.

Low-Power MCU Reset Circuit

Photodiode Bias Stabilization

Use Scenario: Generating clean 27 V reset threshold for ARM Cortex-M0+ microcontroller with internal brown-out detection disabled.

IC Role / Device Role / Timing Role: Zener diode supplies precise trigger voltage to external reset supervisor IC input.

Use Value: Guarantees reset assertion within 10 μs of supply drop below 25.1 V, meeting 100 ms system-level fail-safe timing.

Use Scenario: Stabilizing reverse bias voltage across high-speed InGaAs photodiode in optical time-of-flight receiver.

IC Role / Device Role / Timing Role: Maintains constant 27 V bias despite supply ripple, ensuring linear photocurrent response.

Use Value: Reduces bias-induced gain variation to <0.1 % over 10 kHz–1 MHz bandwidth, preserving pulse timing accuracy.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5256BS	Same 27 V nominal, ±5 % tolerance, but SOT-23 package (higher R_th(j-a) = 350 K/W)	Less suitable for >200 mW continuous operation due to higher thermal resistance	Prefer when board space is constrained and power <150 mW
Vishay BZX84-C27	27 V nominal, ±5 %, same SOD-123 package, but 350 mW P_tot rating (vs. 590 mW)	Limited to lower-power biasing where derating below 200 mW is acceptable	Choose when legacy BOM alignment with Vishay portfolio is required

Compared with MMBZ5256BS and BZX84-C27, BZT52-C27J delivers 68 % higher power capability and identical thermal interface performance in SOD123, making it optimal for sustained 27 V regulation in compact industrial modules.

Availability

BZT52-C27J is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, MCU reset supervision, and photodiode biasing requiring stable component supply with full traceability and no minimum order quantity.

Supply support for BZT52-C27J 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 and industrial-grade components.

The BZT52 series targets cost-sensitive, space-constrained applications needing robust Zener regulation across 2.4–75 V, emphasizing manufacturability, thermal performance, and consistent parametric distribution.

FAQ

What is the maximum continuous reverse current the BZT52-C27J can handle at 27 V?

The BZT52-C27J is not rated for continuous reverse current at its Zener voltage; instead, it regulates by dissipating power. At 27 V, maximum continuous current is derived from P_tot = 590 mW, yielding ~21.8 mA (590 mW ÷ 27 V). Operation above this level requires thermal derating per R_th(j-sp) = 210 K/W.

Can BZT52-C27J be used in place of a BZT52-B27 in an existing design?

Yes, but with trade-offs: BZT52-C27J has ±5 % tolerance (25.1–28.9 V) versus BZT52-B27's ±2 % (26.5–27.5 V). If the application requires tighter regulation-such as precision reference generation-the B-suffix part is preferred; for general clamping or coarse biasing, the C-suffix offers cost advantage without functional compromise.

Does the SOD123 package support hand-soldering repair?

No-Nexperia explicitly recommends reflow soldering only for the SOD123 package. Hand-soldering risks thermal damage due to localized overheating; the small thermal mass and tight pad spacing (0.81 mm lead pitch) make iron-based repair unreliable. Rework requires hot-air station with controlled ramp/soak profiles per Figure 12 footprint.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

At ±0.05 mV/K, the worst-case Zener voltage shift is ±8.75 mV over 175 K span, corresponding to ±0.032 % of 27 V. Combined with initial ±5 % tolerance, total possible deviation remains within ±5.03 %, sufficient for non-critical biasing but insufficient for metrology-grade references without calibration.

BZT52-C27J Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 27 V

Tolerance:: ±7%

Power - Max:: 350 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 18.9 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -55°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

BZT52-C27J FAQ

1.How can I place an order for BZT52-C27J through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52-C27J 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 BZT52-C27J reliable?

The price and inventory of BZT52-C27J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C27J is usually 5 days.

3.What payment methods are accepted for BZT52-C27J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C27J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52-C27J?

BZT52-C27J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52-C27J 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 BZT52-C27J?

For technical support, including BZT52-C27J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C27J requirements.

6.How does Aetrix verify that BZT52-C27J is sourced from the original manufacturer or authorized distributors?

All BZT52-C27J 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 BZT52-C27J meets industry standards.

7.What is the process for return or replacement of BZT52-C27J?

All BZT52-C27J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C27J, 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 BZT52-C27J part is unused and in its original packaging.

Return procedure for BZT52-C27J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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