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

Taiwan Semiconductor Corporation 1PGSMB5944H

Name: 1PGSMB5944H
Brand: Taiwan Semiconductor Corporation
SKU: 1PGSMB5944H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1PGSMB5944H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Zener Diodes

Package:: DO-214AA, SMB

Datasheet:: 1PGSMB5944H.pdf

Description:: DIODE ZENER 62V 3W DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:5,289

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Product details

Overview

1PGSMB5944H from Taiwan Semiconductor is a surface-mount silicon Zener diode with nominal zener voltage 62 V, 3 W power dissipation, 6.0 Ω zener impedance at 100 mA test current, and AEC-Q101 qualification for automotive applications. It regulates voltage in power supply rails and provides stable reference in precision analog circuits.

For engineers reviewing the 1PGSMB5944H datasheet, 1PGSMB5944H pinout, 1PGSMB5944H application, or 1PGSMB5944H equivalent, key selection criteria include zener voltage tolerance (±5%), junction temperature range (–55°C to +175°C), DO-214AA package thermal resistance (R_θJA = 59°C/W), and low-inductance construction for transient suppression.

Technical Context

The 1PGSMB5944H operates as a single-die, unidirectional Zener diode with photo-glass passivated junction for enhanced reliability and moisture resistance (J-STD-020 Level 1). Its 62 V nominal zener voltage is specified at 100 mA test current (I_ZT), with dynamic impedance of 1500 Ω at knee current (I_ZK = 0.25 mA) and leakage current ≤1 μA at 47.1 V reverse voltage.

Thermally, it delivers 3 W total power dissipation at lead temperature (T_L) of 75°C on a 10 mm × 10 mm Cu pad PCB, derating linearly above that temperature. Junction-to-ambient thermal resistance is 59°C/W, enabling stable operation in compact automotive and industrial power management layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z (Nominal)	62 V - precise DC voltage reference point under 100 mA bias, ±5% tolerance ensures predictable clamping in regulation circuits
P_tot	3 W - maximum continuous power handling on standard 10 mm × 10 mm Cu pad PCB, supports robust overvoltage protection
Z_ZT @ I_ZT	6.0 Ω - low dynamic impedance at rated test current, minimizes output voltage variation under load changes
T_J Range	–55°C to +175°C - wide operating junction temperature enables use in under-hood automotive and industrial environments
R_θJA	59°C/W - quantifies thermal path efficiency from junction to ambient air, critical for thermal design margining
I_ZM (Max DC)	24 mA - maximum steady-state zener current before thermal runaway, defines safe continuous conduction limit
V_R @ I_R	47.1 V @ 1 μA - reverse voltage at which leakage remains negligible, confirms effective blocking below zener threshold

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band. Matte tin-plated leads, J-STD-002 solderable, UL 94V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection	Connected to lower potential node; conducts when forward-biased, blocks during reverse operation
Cathode	Zener breakdown terminal / high-side connection	Connected to higher potential node; establishes regulated voltage drop across device during reverse bias

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress testing
Photo-glass passivated junction	Prevents moisture ingress and surface contamination, improving long-term stability and shelf life
Low inductance construction	Minimizes voltage overshoot during fast transients, enhancing ESD and surge suppression performance
J-STD-020 Level 1 moisture sensitivity	Enables direct placement without baking, reducing manufacturing complexity and cost
Halogen-free per IEC 61249-2-21	Complies with environmental regulations for RoHS-compliant end products and recycling requirements

Applications

Automotive Power Rail Protection	Industrial Voltage Reference
Use Scenario: Clamping transient spikes on 48 V battery-supplied ECUs in ADAS modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp. Use Value: 62 V nominal zener voltage provides headroom above nominal 48 V rail while maintaining margin against ISO 7637-2 pulse 5a (100 V peak).	Use Scenario: Providing stable reference for 16-bit ADC in programmable logic controller analog input module. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance. Use Value: 6.0 Ω Z_ZT ensures <0.1% output variation under 10 mA load change, supporting 0.01% measurement accuracy.
DC-DC Converter Feedback Network	Surge Suppression in Telecom Interface
Use Scenario: Setting output voltage in isolated flyback converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference in secondary-side regulation circuit. Use Value: Tight ±5% V_Z tolerance eliminates need for post-production trimming, reducing BOM count and calibration time.	Use Scenario: Protecting RS-485 transceiver inputs from lightning-induced surges on outdoor data links. IC Role / Device Role / Timing Role: Primary shunt clamp in multi-stage TVS architecture. Use Value: 3 W power rating and 175°C max junction temperature allow sustained energy absorption without thermal failure during repeated 10/1000 µs transients.

Automotive Power Rail Protection

Industrial Voltage Reference

Use Scenario: Clamping transient spikes on 48 V battery-supplied ECUs in ADAS modules.

IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp.

Use Value: 62 V nominal zener voltage provides headroom above nominal 48 V rail while maintaining margin against ISO 7637-2 pulse 5a (100 V peak).

Use Scenario: Providing stable reference for 16-bit ADC in programmable logic controller analog input module.

IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance.

Use Value: 6.0 Ω Z_ZT ensures <0.1% output variation under 10 mA load change, supporting 0.01% measurement accuracy.

DC-DC Converter Feedback Network

Surge Suppression in Telecom Interface

Use Scenario: Setting output voltage in isolated flyback converter feedback loop using optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Zener reference in secondary-side regulation circuit.

Use Value: Tight ±5% V_Z tolerance eliminates need for post-production trimming, reducing BOM count and calibration time.

Use Scenario: Protecting RS-485 transceiver inputs from lightning-induced surges on outdoor data links.

IC Role / Device Role / Timing Role: Primary shunt clamp in multi-stage TVS architecture.

Use Value: 3 W power rating and 175°C max junction temperature allow sustained energy absorption without thermal failure during repeated 10/1000 µs transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ64A	64 V standoff voltage, 600 W peak pulse power, unidirectional TVS (not Zener-regulated)	Designed for transient suppression only; lacks precision DC regulation capability	Select SMBJ64A only when primary requirement is high-energy surge clamping, not stable DC reference
BZT52-B62	62 V nominal, SOD-123 package, 500 mW power rating, ±5% tolerance	Lower power handling limits use to low-current references (<5 mA); smaller footprint but higher R_θJA	Choose BZT52-B62 for space-constrained, low-power reference designs where 3 W dissipation is unnecessary

Compared with SMBJ64A and BZT52-B62, the 1PGSMB5944H uniquely combines automotive-grade reliability, 3 W continuous regulation capability, and 62 V precision zener voltage in the DO-214AA package-making it optimal for high-stability, medium-power voltage reference and protection roles where both DC accuracy and transient resilience matter.

Availability

1PGSMB5944H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and telecom interface protection requiring stable component supply and AEC-Q101 compliance.

Supply support for 1PGSMB5944H 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, rectifiers, and protection components with global distribution and automotive qualification capabilities.

The 1PGSMB series was designed specifically for surface-mount Zener regulation in harsh-environment applications, emphasizing AEC-Q101 compliance, thermal robustness, and tight voltage tolerance in the DO-214AA package.

FAQ

What is the nominal zener voltage and tolerance of the 1PGSMB5944H?

The 1PGSMB5944H has a nominal zener voltage of 62 V with a tolerance of ±5%, meaning the actual measured V_Z falls between 58.9 V and 65.1 V at 100 mA test current (I_ZT). This tolerance is confirmed in the Electrical Specifications table and applies across the full operating temperature range of –55°C to +175°C. The 1PGSMB5944H achieves this specification using photo-glass passivation for junction stability.

Is the 1PGSMB5944H suitable for automotive applications?

Yes, the 1PGSMB5944H is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS systems. It meets stress tests for temperature cycling, mechanical shock, and humidity resistance. The 1PGSMB5944H also features J-STD-020 Level 1 moisture sensitivity and halogen-free construction per IEC 61249-2-21, aligning with automotive manufacturing and environmental requirements.

What is the maximum DC zener current (I_ZM) for the 1PGSMB5944H?

The maximum DC zener current (I_ZM) for the 1PGSMB5944H is 24 mA. This value is derived from the 3 W power rating and the minimum zener voltage (58.9 V), ensuring safe continuous operation without exceeding thermal limits. Exceeding 24 mA risks junction overheating, especially without adequate PCB copper area. The 1PGSMB5944H's R_θJA of 59°C/W must be considered in layout design to maintain T_J ≤ 175°C.

Does the 1PGSMB5944H have a defined polarity marking, and how is it identified?

Yes, the 1PGSMB5944H uses a cathode band to indicate polarity, consistent with DO-214AA (SMB) package standards. The band is located on the cathode end of the molded case and corresponds to the terminal that must be held at higher potential during zener operation. This marking is visible on the device body and matches the polarity diagram in the Package Outline Dimensions section of the datasheet. Correct orientation is essential for proper 1PGSMB5944H function in voltage regulation or clamping circuits.

What is the zener impedance (Z_ZT) of the 1PGSMB5944H, and why does it matter?

The zener impedance (Z_ZT) of the 1PGSMB5944H is 6.0 Ω, measured at the 100 mA test current (I_ZT). This low dynamic impedance means the device maintains stable output voltage under varying load conditions-critical for precision reference and regulation. A lower Z_ZT reduces output ripple and improves line/load regulation. For the 1PGSMB5944H, this value directly supports its use in high-accuracy analog circuits where voltage deviation must remain within tight bounds.

1PGSMB5944H 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):: 62 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 47.1 V

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

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

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

1PGSMB5944H FAQ

1.How can I place an order for 1PGSMB5944H through Aetrix?

Please submit a Request for Quotation (RFQ) for 1PGSMB5944H 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 1PGSMB5944H reliable?

The price and inventory of 1PGSMB5944H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PGSMB5944H is usually 5 days.

3.What payment methods are accepted for 1PGSMB5944H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PGSMB5944H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1PGSMB5944H?

1PGSMB5944H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1PGSMB5944H 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 1PGSMB5944H?

For technical support, including 1PGSMB5944H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PGSMB5944H requirements.

6.How does Aetrix verify that 1PGSMB5944H is sourced from the original manufacturer or authorized distributors?

All 1PGSMB5944H 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 1PGSMB5944H meets industry standards.

7.What is the process for return or replacement of 1PGSMB5944H?

All 1PGSMB5944H units undergo pre-shipment inspection (PSI). If there is an issue with 1PGSMB5944H, 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 1PGSMB5944H part is unused and in its original packaging.

Return procedure for 1PGSMB5944H:

1.Submit a request within 90 days.

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

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