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

Taiwan Semiconductor Corporation BZD27C39P

Name: BZD27C39P
Brand: Taiwan Semiconductor Corporation
SKU: BZD27C39P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZD27C39P

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Zener Diodes

Package:: DO-219AB

Datasheet:: BZD27C39P.pdf

Description:: DIODE ZENER 39V 1W SUB SMA

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

BZD27C39P from Taiwan Semiconductor is a 1 W, 39 V ±5% Zener diode in Sub SMA package, specified at 10 mA test current with 21 Ω typical dynamic resistance and 0.06 %/°C temperature coefficient, used for precision voltage regulation in power supply reference circuits.

For engineers reviewing the BZD27C39P datasheet, BZD27C39P pinout, BZD27C39P application, or BZD27C39P equivalent, key selection criteria include Zener voltage tolerance, surge power rating (100 W for 10/1000 μs waveform), thermal resistance (R_θJA = 88 °C/W), and moisture sensitivity level (MSL 1).

Technical Context

The BZD27C39P operates as a single-die silicon Zener diode optimized for stable voltage reference and transient overvoltage protection. It delivers 39 V nominal breakdown with ±5% tolerance (37–41 V), 21 Ω typical dynamic resistance at I_ZT = 10 mA, and low leakage (≤1 μA at 30 V reverse bias).

Its thermal design supports continuous operation up to T_J = 175 °C, enabled by R_θJL = 44 °C/W and R_θJC = 48 °C/W on standard 5 mm × 5 mm Cu pad. Non-repetitive peak pulse power is rated at 100 W for 10/1000 μs waveform per JEDEC standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	37–41 V (±5% tolerance at I_ZT = 10 mA; enables stable reference within tight regulation bands)
Dynamic Resistance r_diff	21 Ω typ (low impedance ensures minimal output voltage shift under load variation)
Temperature Coefficient α_Z	0.06 %/°C (reduces drift in temperature-sensitive reference designs)
Power Dissipation P_tot	1.0 W @ T_A = 25°C (derates linearly above 25°C per R_θJA = 88 °C/W)
Reverse Leakage I_R	≤1 μA @ V_R = 30 V (ensures low standby power loss in high-impedance bias networks)
Surge Power Rating	100 W @ 10/1000 μs (supports transient suppression in industrial input stages)
Junction Temperature Range	−55 to +175 °C (enables deployment in extended-temperature automotive and industrial environments)

Pinout & Package

Package: Sub SMA - low-profile surface-mount case with matte tin-plated leads, polarity indicated by cathode band, UL 94V-0 molding compound, MSL Level 1, weight ≈0.019 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential node in reverse-biased Zener configuration
Cathode	Zener breakdown terminal	Marked by band; connected to higher-potential node to enable regulated voltage drop

Key Features

Feature	Design Value
Low-profile Sub SMA package	Enables high-density PCB layouts while maintaining 1 W thermal capability on 5 mm × 5 mm Cu pad
MSL Level 1 rating	Eliminates bake requirements prior to reflow, reducing manufacturing overhead and moisture-related failures
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications
Stable Zener voltage over temperature	0.06 %/°C coefficient minimizes reference drift across −55 to +175 °C operating range
Low leakage current	≤1 μA at 30 V reverse bias preserves accuracy in high-impedance voltage divider networks

Applications

Power Supply Reference	Overvoltage Protection
Use Scenario: Providing stable 39 V reference for feedback loop of isolated DC-DC converters. IC Role / Device Role / Timing Role: Voltage reference element setting output regulation point via optocoupler feedback path. Use Value: Tight 37–41 V tolerance and 0.06 %/°C TC ensure <±1% output accuracy over full temperature range.	Use Scenario: Clamping transient surges on 24 V industrial control inputs exposed to inductive switching noise. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy during ESD or inductive kick events. Use Value: 100 W 10/1000 μs surge rating absorbs repetitive transients without degradation.
Instrumentation Calibration	LED Constant-Current Bias
Use Scenario: Precision voltage reference in portable multimeter analog front-end circuitry. IC Role / Device Role / Timing Role: Stable reference source for ADC reference buffer and DAC output scaling. Use Value: ≤1 μA leakage and 21 Ω dynamic resistance maintain linearity and offset stability in µA-level bias paths.	Use Scenario: Setting reference voltage for LM317-based constant-current LED driver. IC Role / Device Role / Timing Role: Zener-defined reference enabling accurate current setpoint independent of input ripple. Use Value: Low TC and tight V_Z tolerance ensure consistent LED brightness across ambient temperature shifts.

Power Supply Reference

Overvoltage Protection

Use Scenario: Providing stable 39 V reference for feedback loop of isolated DC-DC converters.

IC Role / Device Role / Timing Role: Voltage reference element setting output regulation point via optocoupler feedback path.

Use Value: Tight 37–41 V tolerance and 0.06 %/°C TC ensure <±1% output accuracy over full temperature range.

Use Scenario: Clamping transient surges on 24 V industrial control inputs exposed to inductive switching noise.

IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy during ESD or inductive kick events.

Use Value: 100 W 10/1000 μs surge rating absorbs repetitive transients without degradation.

Instrumentation Calibration

LED Constant-Current Bias

Use Scenario: Precision voltage reference in portable multimeter analog front-end circuitry.

IC Role / Device Role / Timing Role: Stable reference source for ADC reference buffer and DAC output scaling.

Use Value: ≤1 μA leakage and 21 Ω dynamic resistance maintain linearity and offset stability in µA-level bias paths.

Use Scenario: Setting reference voltage for LM317-based constant-current LED driver.

IC Role / Device Role / Timing Role: Zener-defined reference enabling accurate current setpoint independent of input ripple.

Use Value: Low TC and tight V_Z tolerance ensure consistent LED brightness across ambient temperature shifts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics BZX84-C39	0.3 W rating, SOT-23 package, 37–41 V V_Z, 90 Ω r_diff	Limited to low-power bias/reference; unsuitable for >100 mA regulation or surge clamping	Select when board space is critical and power dissipation ≤300 mW
Vishay BZT52-B39	39 V nominal, 0.4 W, SOD-123, 45 Ω r_diff, MSL Level 1	Lower surge rating (40 W), higher dynamic resistance reduces regulation precision	Choose for cost-sensitive consumer applications where 1 W dissipation is not required

Compared with BZD27C39P, BZX84-C39 offers smaller footprint but sacrifices 70% power handling and regulation stability; BZT52-B39 provides mid-tier performance but lacks the 100 W surge capability and low 21 Ω impedance critical for industrial-grade references.

Availability

BZD27C39P is available at Aetrix Electronics and suitable for industrial power supplies, instrumentation calibration circuits, and overvoltage protection systems requiring stable component supply and long-term lifecycle support.

Supply support for BZD27C39P 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, analog ICs, and protection components for industrial and automotive markets.

The BZD27C series is part of TSC's high-reliability Zener diode product line, engineered for precision voltage reference and robust transient suppression in harsh-environment applications.

FAQ

What is the Zener voltage tolerance of BZD27C39P?

The BZD27C39P has a nominal Zener voltage of 39 V with a tolerance of ±5%, corresponding to a guaranteed range of 37 V to 41 V at test current I_ZT = 10 mA. This tolerance is verified per Taiwan Semiconductor's AB2103 specification document and applies across the full operating temperature range.

Does BZD27C39P support reflow soldering without moisture preconditioning?

Yes, BZD27C39P is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/85% RH and subjected to standard lead-free reflow profiles without baking. Its Sub SMA package uses moisture-resistant molding compound compliant with industry reliability standards.

What is the maximum non-repetitive surge power rating for BZD27C39P?

The BZD27C39P is rated for 100 W non-repetitive peak pulse power under 10/1000 μs waveform conditions, as specified for the BZD27C110P–BZD27C220P subgroup. This rating assumes T_J = 25 °C prior to surge and applies to transient suppression in industrial signal lines and power rails.

How does the temperature coefficient affect BZD27C39P in precision reference designs?

The BZD27C39P exhibits a temperature coefficient of 0.06 %/°C, meaning its Zener voltage shifts by approximately ±23 mV over a 100 °C span. This low drift supports stable reference performance in instrumentation and feedback circuits where long-term accuracy is critical without active compensation.

Is BZD27C39P halogen-free and RoHS compliant?

Yes, BZD27C39P meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The Sub SMA package uses bromine- and chlorine-free molding compound, and all terminations are matte tin-plated per J-STD-002 solderability requirements.

BZD27C39P Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-219AB

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Voltage - Zener (Nom) (Vz):: 39 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 30 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Sub SMA

BZD27C39P FAQ

1.How can I place an order for BZD27C39P through Aetrix?

Please submit a Request for Quotation (RFQ) for BZD27C39P 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 BZD27C39P reliable?

The price and inventory of BZD27C39P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27C39P is usually 5 days.

3.What payment methods are accepted for BZD27C39P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27C39P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZD27C39P?

BZD27C39P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZD27C39P 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 BZD27C39P?

For technical support, including BZD27C39P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27C39P requirements.

6.How does Aetrix verify that BZD27C39P is sourced from the original manufacturer or authorized distributors?

All BZD27C39P 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 BZD27C39P meets industry standards.

7.What is the process for return or replacement of BZD27C39P?

All BZD27C39P units undergo pre-shipment inspection (PSI). If there is an issue with BZD27C39P, 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 BZD27C39P part is unused and in its original packaging.

Return procedure for BZD27C39P:

1.Submit a request within 90 days.

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

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