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Taiwan Semiconductor Corporation 1PGSMA4745H
- Part No.:
- 1PGSMA4745H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1PGSMA4745H.pdf
- Description:
- DIODE ZENER 16V 1.25W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,400
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Product details
Overview
1PGSMA4745H from Taiwan Semiconductor is a 1 W, 16 V ±5% surface-mount Zener diode in DO-214AC (SMA) package, with 15.5 Ω dynamic impedance at 16 mA test current, <1 µA leakage above 12.2 V, and AEC-Q101 qualification for automotive-grade voltage regulation and transient protection.
For engineers reviewing the 1PGSMA4745H datasheet, 1PGSMA4745H pinout, 1PGSMA4745H application, or 1PGSMA4745H equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJA = 120 °C/W), low-inductance SMA package suitability for automated placement, and compliance with JESD201 Class 2 whisker testing and RoHS/halogen-free requirements.
Technical Context
The 1PGSMA4745H operates as a single-die, unidirectional voltage reference device with photo-glass passivated junction for stable breakdown characteristics. It delivers precise 16 V regulation at IZT = 16 mA, with Zener impedance of 15.5 Ω and maximum DC Zener current of 57 mA under rated conditions.
Designed for operation across –55 °C to +175 °C junction temperature range, it supports stable performance in high-reliability environments. Its DO-214AC (SMA) package provides low inductance, matte tin-plated leads compliant with J-STD-002 solderability, and polarity indicated by cathode band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.2–16.8 V (±5% tolerance at IZT = 16 mA; enables tight regulation in 16 V rail clamping) |
| Power Dissipation (Ptot) | 1 W at TA = 75 °C (derates linearly above 50 °C; requires 5 mm × 5 mm Cu pad for full rating) |
| Zener Impedance (ZZT) | 15.5 Ω max at IZT = 16 mA (low dynamic impedance ensures minimal output voltage variation under load transients) |
| Leakage Current (IR) | <1 µA at VR = 12.2 V (enables low-power standby mode without significant quiescent loss) |
| Junction Temperature (TJ) | –55 to +175 °C (supports under-hood automotive and industrial control applications) |
| Thermal Resistance (RθJA) | 120 °C/W (on 5 mm × 5 mm Cu pad; informs PCB thermal design for sustained 1 W operation) |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal device with anode and cathode leads formed for reflow soldering on standard PCB pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node for reverse-biased operation | Connected to system ground or lower-potential rail during Zener regulation or clamping |
| Cathode | Regulated output / clamping node | Connected to protected node; maintains ~16 V relative to anode when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress-test requirements (HTOL, TC, HAST, etc.) |
| Photo-glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure |
| Low inductance construction | Minimizes voltage overshoot during fast transient suppression (e.g., ISO 7637-2 pulse 1/2a) |
| Moisture sensitivity level 1 | No bake preconditioning required before reflow; compatible with standard SMT assembly lines |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained designs |
Applications
| Automotive ECU Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 12 V supply rail against load dump transients in engine control units. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp voltage spikes to ≤16.8 V. Use Value: Prevents overvoltage damage to downstream MCUs and CAN transceivers using its 1 W surge capability and AEC-Q101 reliability. | Use Scenario: Providing stable 16 V reference for precision op-amp biasing in 4–20 mA transmitter circuits. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed bias point independent of supply variation. Use Value: Enables <±0.5% reference stability over temperature due to low ZZT and tight 16 V tolerance. |
| Consumer Power Adapter Overvoltage Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for USB-C PD power supplies. IC Role / Device Role / Timing Role: Shunt regulator that activates at 16 V to divert excess current and trigger foldback shutdown. Use Value: Achieves fast response (<100 ns) and low leakage (<1 µA) to maintain efficiency in no-load conditions. | Use Scenario: Primary-stage transient voltage suppression on analog telephone line interface cards. IC Role / Device Role / Timing Role: Standby clamping device limiting induced surges to safe levels before conditioning circuitry. Use Value: Withstands repeated 10/1000 µs surges up to 1 kW thanks to robust 175 °C junction rating and glass-passivated junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16 | 350 mW SOT-23 package; ZZT = 40 Ω at 5 mA; no AEC-Q101 qualification | Limited to low-power consumer applications; unsuitable for automotive under-hood use | Select 1PGSMA4745H when >1 W dissipation, AEC-Q101, or DO-214AC mechanical robustness is required. |
| SMBJ16A | 600 W peak power TVS; bidirectional; VBR = 17.8 V min; not a precision Zener | Designed for ESD/surge suppression, not voltage regulation or reference | Choose 1PGSMA4745H for regulated reference or steady-state clamping; SMBJ16A only for transient-only protection. |
Compared with BZX84-C16 and SMBJ16A, the 1PGSMA4745H uniquely combines automotive qualification, 1 W continuous power, ±5% Zener tolerance, and low-impedance regulation-making it suitable where precision, reliability, and sustained power handling intersect.
Availability
1PGSMA4745H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, consumer power adapters, and telecom line interfaces requiring stable component supply and AEC-Q101-compliant Zener performance.
Supply support for 1PGSMA4745H 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, including Zener, TVS, rectifier, and MOSFET products.
The 1PGSMA series is engineered for high-reliability surface-mount voltage regulation and protection, targeting automotive, industrial, and consumer applications demanding AEC-Q101 compliance and robust thermal performance.
FAQ
What is the Zener voltage tolerance of the 1PGSMA4745H?
The 1PGSMA4745H has a nominal Zener voltage of 16 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 15.2 V and 16.8 V at IZT = 16 mA. This tolerance is explicitly defined in the Electrical Specifications table and applies across the full operating temperature range.
Is the 1PGSMA4745H suitable for automotive applications?
Yes, the 1PGSMA4745H is AEC-Q101 qualified and designed for automotive use. Its construction includes photo-glass passivation, JESD201 Class 2 whisker resistance, and operation up to +175 °C junction temperature-meeting critical reliability requirements for engine control, body electronics, and ADAS subsystems.
What is the maximum DC Zener current for the 1PGSMA4745H?
The maximum DC Zener current for the 1PGSMA4745H is 57 mA, specified at VZ = 12.2 V (the voltage at which IR ≤ 1 µA). This value is derived from the "Maximum DC Zener Current" column in the Electrical Specifications table and reflects safe continuous conduction capability under rated thermal conditions.
Does the 1PGSMA4745H have a defined polarity marking?
Yes, the 1PGSMA4745H uses a cathode band to indicate polarity on the DO-214AC (SMA) package body. The banded end corresponds to the cathode terminal, and correct orientation is essential for proper reverse-bias operation in regulation or clamping circuits.
What is the thermal resistance from junction to ambient for the 1PGSMA4745H?
The junction-to-ambient thermal resistance (RθJA) of the 1PGSMA4745H is 120 °C/W when mounted on a 5 mm × 5 mm copper pad test board. This value is measured per JEDEC standards and guides PCB layout decisions to ensure safe operation at 1 W dissipation.
1PGSMA4745H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 12.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
1PGSMA4745H FAQ
1.How can I place an order for 1PGSMA4745H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PGSMA4745H 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 1PGSMA4745H reliable?
The price and inventory of 1PGSMA4745H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PGSMA4745H is usually 5 days.
3.What payment methods are accepted for 1PGSMA4745H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PGSMA4745H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PGSMA4745H?
1PGSMA4745H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PGSMA4745H 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 1PGSMA4745H?
For technical support, including 1PGSMA4745H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PGSMA4745H requirements.
6.How does Aetrix verify that 1PGSMA4745H is sourced from the original manufacturer or authorized distributors?
All 1PGSMA4745H 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 1PGSMA4745H meets industry standards.
7.What is the process for return or replacement of 1PGSMA4745H?
All 1PGSMA4745H units undergo pre-shipment inspection (PSI). If there is an issue with 1PGSMA4745H, 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 1PGSMA4745H part is unused and in its original packaging.
Return procedure for 1PGSMA4745H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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