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

Taiwan Semiconductor Corporation 1PGSMB5935

Name: 1PGSMB5935
Brand: Taiwan Semiconductor Corporation
SKU: 1PGSMB5935
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1PGSMB5935

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Zener Diodes

Package:: DO-214AA, SMB

Datasheet:: 1PGSMB5935.pdf

Description:: DIODE ZENER 27V 3W DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:4,109

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Product details

Overview

1PGSMB5935 from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 27 V, 3 W power rating, 13.9 Ω dynamic impedance at 23 mA test current, and DO-214AA (SMB) package. It regulates voltage in DC/DC converters and SMPS feedback loops where stable reference and low thermal resistance are required.

For engineers reviewing the 1PGSMB5935 datasheet, 1PGSMB5935 pinout, 1PGSMB5935 application, or 1PGSMB5935 equivalent, key selection criteria include zener voltage tolerance (±5%), junction-to-lead thermal resistance (21 °C/W), leakage current (≤0.25 μA at 20.6 V), and compliance with J-STD-020 moisture sensitivity level 1.

Technical Context

The 1PGSMB5935 operates as a single-die, silicon planar Zener diode with glass-passivated junction for stability under thermal cycling and humidity exposure. Its 27 V nominal zener voltage is specified at 23 mA test current (IZT), with dynamic impedance (ZZT) of 13.9 Ω measured at 60 Hz AC superimposed on DC bias.

Designed for surface-mount assembly, it features matte tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 2 whisker resistance. Thermal performance is characterized on a 10 mm × 10 mm Cu pad PCB, yielding R_θJA = 59 °C/W and R_θJL = 21 °C/W.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z (Nominal)	27 V - precise DC voltage reference point at 23 mA test current
V_Z Range	25.65–28.35 V - ±5% tolerance ensures predictable clamping in feedback networks
P_tot	3 W - maximum continuous power dissipation at 75°C lead temperature
I_ZM	56 mA - maximum DC zener current before thermal runaway risk
Z_ZT@I_ZT	13.9 Ω - low dynamic impedance maintains regulation accuracy under load transients
T_J max	+175 °C - high junction temperature rating supports operation in compact, thermally constrained layouts
R_θJL	21 °C/W - enables efficient heat transfer to PCB copper, critical for sustained 3 W operation

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode indicated by band-marked end. Matte tin-plated leads ensure reliable reflow soldering per J-STD-002; polarity must be observed during placement.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Reference ground node in reverse-biased configuration	Connected to system ground or lower-potential rail when used as shunt regulator
Cathode	Regulated output node in reverse-biased configuration	Provides stable 27 V reference relative to anode; marked by visible band on package

Key Features

Feature	Design Value
Photo glass passivation	Protects junction from moisture ingress and ionic contamination, enabling long-term stability in humid environments
Low inductance construction	Minimizes voltage overshoot during fast transient suppression, critical for SMPS feedback path integrity
J-STD-020 Level 1 MSL	Zero floor life limitation - no baking required prior to reflow, simplifying SMT line logistics
UL 94V-0 molding compound	Self-extinguishing encapsulation meets safety requirements for enclosed power electronics
Halogen-free per IEC 61249-2-21	Complies with environmental regulations for RoHS-compliant industrial and consumer products

Applications

Switching Mode Power Supply (SMPS)	On-board DC/DC Converter
Use Scenario: Voltage reference in optocoupler-based feedback loop of isolated flyback converter. IC Role / Device Role / Timing Role: Zener diode provides precise 27 V clamp for TL431 reference input or direct regulation of secondary-side error amplifier. Use Value: Tight ±5% V_Z tolerance and low 13.9 Ω Z_ZT ensure stable output regulation across line/load variations without external trimming.	Use Scenario: Overvoltage protection and reference generation in point-of-load (POL) buck converter for FPGA core supply. IC Role / Device Role / Timing Role: Shunt regulator stabilizes feedback divider node and clamps transient spikes exceeding 28.35 V. Use Value: 3 W power rating and 21 °C/W R_θJL allow sustained clamping during 100 ms overvoltage events without thermal shutdown.
Lighting Application	Adapter
Use Scenario: Constant-current regulation reference in LED driver IC feedback network for commercial downlighters. IC Role / Device Role / Timing Role: Sets accurate current-sense threshold voltage for linear or buck LED controller. Use Value: Low 0.25 μA leakage at 20.6 V prevents false triggering and maintains dimming linearity at low output currents.	Use Scenario: Output voltage sensing and regulation in universal-input AC/DC adapter for consumer electronics. IC Role / Device Role / Timing Role: Provides stable 27 V reference to PWM controller's feedback pin in secondary-side regulation scheme. Use Value: Glass-passivated junction ensures reliability over 50,000-hour lifetime under thermal cycling between -40°C and +85°C ambient.

Switching Mode Power Supply (SMPS)

On-board DC/DC Converter

Use Scenario: Voltage reference in optocoupler-based feedback loop of isolated flyback converter.

IC Role / Device Role / Timing Role: Zener diode provides precise 27 V clamp for TL431 reference input or direct regulation of secondary-side error amplifier.

Use Value: Tight ±5% V_Z tolerance and low 13.9 Ω Z_ZT ensure stable output regulation across line/load variations without external trimming.

Use Scenario: Overvoltage protection and reference generation in point-of-load (POL) buck converter for FPGA core supply.

IC Role / Device Role / Timing Role: Shunt regulator stabilizes feedback divider node and clamps transient spikes exceeding 28.35 V.

Use Value: 3 W power rating and 21 °C/W R_θJL allow sustained clamping during 100 ms overvoltage events without thermal shutdown.

Lighting Application

Adapter

Use Scenario: Constant-current regulation reference in LED driver IC feedback network for commercial downlighters.

IC Role / Device Role / Timing Role: Sets accurate current-sense threshold voltage for linear or buck LED controller.

Use Value: Low 0.25 μA leakage at 20.6 V prevents false triggering and maintains dimming linearity at low output currents.

Use Scenario: Output voltage sensing and regulation in universal-input AC/DC adapter for consumer electronics.

IC Role / Device Role / Timing Role: Provides stable 27 V reference to PWM controller's feedback pin in secondary-side regulation scheme.

Use Value: Glass-passivated junction ensures reliability over 50,000-hour lifetime under thermal cycling between -40°C and +85°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ27A	TVS diode (unidirectional), 27 V standoff, 43.5 V breakdown, 600 W peak pulse power	Designed for transient surge suppression, not precision DC regulation	Select only if primary need is ESD/line surge protection; not suitable as voltage reference
BZX84-C27	SOT-23 package, 27 V ±5%, 300 mW power, 30 Ω Z_ZT @ 5 mA	Lower power and higher impedance limit use to low-current signal-level references	Choose for space-constrained logic-level biasing; avoid in 3 W power regulation paths

Compared with SMBJ27A and BZX84-C27, the 1PGSMB5935 delivers true 3 W DC zener regulation with 13.9 Ω impedance and SMB package thermal performance-making it uniquely suited for high-stability, medium-power feedback and clamping roles where TVS or low-power Zeners fall short.

Availability

1PGSMB5935 is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for 1PGSMB5935 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 since 1979.

The 1PGSMB59xx series is part of TSC's high-reliability Zener diode product line engineered for precision voltage regulation in industrial-grade power conversion systems operating from -55°C to +175°C.

FAQ

What is the exact zener voltage tolerance for 1PGSMB5935?

The 1PGSMB5935 has a nominal zener voltage of 27 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 25.65 V and maximum of 28.35 V at 23 mA test current and 25°C ambient. This tolerance is confirmed in the Electrical Specifications table and applies to all units within the production lot.

Can 1PGSMB5935 be used in place of a 24 V Zener diode?

No-1PGSMB5935 is specifically rated for 27 V nominal zener voltage and must not be substituted for 24 V devices without circuit revalidation. Its 25.65–28.35 V range does not overlap the typical 22.8–25.2 V range of 24 V Zeners like 1PGSMB5934, and using it in a 24 V design risks overvoltage at the regulated node.

What is the maximum DC zener current (I_ZM) for 1PGSMB5935?

The maximum DC zener current for 1PGSMB5935 is 56 mA, derived from its 3 W power rating and minimum zener voltage of 25.65 V (I_ZM = P_tot/V_Zmin). Exceeding this current risks thermal runaway, especially above 75°C lead temperature where power derating begins.

Does 1PGSMB5935 require moisture sensitivity handling before reflow?

No-1PGSMB5935 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry-pack storage or pre-reflow baking. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during standard Pb-free reflow profiles.

What is the leakage current specification for 1PGSMB5935?

The leakage current for 1PGSMB5935 is specified as ≤0.25 μA at V_R = 20.6 V (80% of nominal V_Z). This ultra-low leakage ensures minimal error contribution in high-impedance feedback networks and supports stable operation in battery-powered or energy-harvesting circuits.

1PGSMB5935 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: 1PGSMB59

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 23 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 20.6 V

Voltage - Forward (Vf) (Max) @ If:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

1PGSMB5935 FAQ

1.How can I place an order for 1PGSMB5935 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1PGSMB5935 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 1PGSMB5935 reliable?

The price and inventory of 1PGSMB5935 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PGSMB5935 is usually 5 days.

3.What payment methods are accepted for 1PGSMB5935?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PGSMB5935 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1PGSMB5935?

1PGSMB5935 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1PGSMB5935 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 1PGSMB5935?

For technical support, including 1PGSMB5935 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PGSMB5935 requirements.

6.How does Aetrix verify that 1PGSMB5935 is sourced from the original manufacturer or authorized distributors?

All 1PGSMB5935 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 1PGSMB5935 meets industry standards.

7.What is the process for return or replacement of 1PGSMB5935?

All 1PGSMB5935 units undergo pre-shipment inspection (PSI). If there is an issue with 1PGSMB5935, 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 1PGSMB5935 part is unused and in its original packaging.

Return procedure for 1PGSMB5935:

1.Submit a request within 90 days.

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

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