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Taiwan Semiconductor Corporation 1SMA5928H
- Part No.:
- 1SMA5928H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5928H.pdf
- Description:
- DIODE ZENER 13V 1.5W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,245
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Product details
Overview
1SMA5928H from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 13 V, 1.5 W power dissipation, and DO-214AC (SMA) package. It delivers stable voltage regulation in DC/DC converters and SMPS circuits, featuring AEC-Q101 qualification, glass passivated junction, and leakage current <0.5 µA at 9.9 V reverse bias.
For engineers reviewing the 1SMA5928H datasheet, 1SMA5928H pinout, 1SMA5928H application, or 1SMA5928H equivalent, key selection criteria include zener voltage tolerance (±5%), dynamic impedance (7.0 Ω at 28.8 mA), maximum DC zener current (115 mA), and compliance with JEDEC Class 3B HBM ESD rating.
Technical Context
The 1SMA5928H operates as a single-die, unidirectional voltage reference device with cathode-band polarity indication. Its glass-passivated junction ensures low leakage and stable breakdown characteristics across -55°C to +150°C junction temperature range.
Designed for surface-mount automated placement, it uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 2 whisker resistance. The DO-214AC package provides low inductance and UL 94V-0 flammability-rated molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35–13.65 V at 28.8 mA - tight ±5% tolerance enables precise voltage clamping in feedback loops |
| Power Dissipation (PD) | 1.5 W at TL = 75°C - supports continuous regulation in compact power stages without forced cooling |
| Dynamic Impedance (ZZT) | 7.0 Ω at IZT = 28.8 mA - low AC impedance maintains regulation stability under varying load conditions |
| Leakage Current (IR) | <0.5 µA at VR = 9.9 V - minimal standby loss critical for energy-sensitive adapters and lighting controls |
| Junction Temperature (TJ) | -55°C to +150°C - qualified for under-hood automotive and industrial environments per AEC-Q101 |
| ESD Rating | Class 3B (HBM) - withstands ≥8 kV human-body-model discharge without parameter shift or failure |
| Package | DO-214AC (SMA) - industry-standard SMD outline enabling drop-in replacement and high-density PCB layout |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; matte tin-plated leads; 0.060 g typical weight; polarity indicated by visible cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Current exit terminal during reverse breakdown | Connected to regulated output node; marked by band; carries full zener current in clamp mode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Glass passivated junction | Eliminates surface contamination sensitivity and improves long-term VZ stability over time and temperature |
| Low inductance structure | Minimizes voltage overshoot during fast transient events in switching regulator feedback paths |
| Moisture sensitivity level 1 | No floor-life limitation or baking requirement before reflow - simplifies SMT manufacturing flow |
| RoHS & halogen-free compliance | Fulfills IEC 61249-2-21 and EU RoHS directives for environmentally constrained end equipment |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Primary-side voltage sensing and overvoltage protection in flyback controllers. IC Role / Device Role / Timing Role: Zener reference for TL431-like feedback divider or direct clamp on auxiliary winding. Use Value: Tight 13 V ±5% tolerance ensures accurate OVP triggering at 13.65 V, preventing MOSFET stress during line surges. |
Use Scenario: Output voltage regulation in isolated buck-derived point-of-load modules. IC Role / Device Role / Timing Role: Secondary-side shunt regulator providing stable 13 V reference for optocoupler feedback loop. Use Value: 7.0 Ω dynamic impedance minimizes output voltage deviation under 10–100 mA load transients. |
| Lighting Application | Adapter Circuitry |
Use Scenario: Constant-current LED driver reference in non-isolated buck topology. IC Role / Device Role / Timing Role: Precision voltage clamp setting gate drive threshold of external MOSFET. Use Value: Leakage <0.5 µA at 9.9 V prevents false turn-on during startup and reduces standby power below 10 mW. |
Use Scenario: Input overvoltage clamping in universal-input AC/DC wall adapters. IC Role / Device Role / Timing Role: Transient suppressor protecting bridge rectifier and bulk capacitor from line spikes. Use Value: 10 A peak surge current rating (8.3 ms half-sine) absorbs 1.2 kV/0.5 J transients without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, ±5%, 1 W PD, DO-41 through-hole package | Lower power rating and through-hole mounting limit use in high-density SMT designs | Select when legacy through-hole assembly or lower-cost prototyping is required |
| BZX84-C13 | 13 V nominal, ±5%, 300 mW PD, SOT-23 package, higher ZZT (20 Ω) | Insufficient power handling for >50 mA continuous clamp duty; unsuitable for SMPS primary-side use | Prefer only for low-current signal-level referencing where space constraints dominate |
Compared with 1SMA5928H, the 1N4742A offers identical voltage tolerance but lacks AEC-Q101 qualification and SMT compatibility, while BZX84-C13 sacrifices 5× power margin and regulation precision-making 1SMA5928H the sole choice for automotive-grade, high-current, surface-mount voltage regulation.
Availability
1SMA5928H is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, automotive-grade reliability, and high-volume tape-and-reel delivery.
Supply support for 1SMA5928H 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The 1SMA5928H belongs to TSC's AEC-Q101-qualified SMA Zener series, engineered specifically for robust voltage regulation in space-constrained, high-reliability power conversion systems.
FAQ
What is the zener voltage tolerance for 1SMA5928H?
The 1SMA5928H has a nominal zener voltage of 13 V with a guaranteed tolerance of ±5%, corresponding to a minimum value of 12.35 V and maximum of 13.65 V at test current IZT = 28.8 mA. This tolerance is specified per the manufacturer's datasheet revision A2102 and applies under thermal equilibrium conditions.
Is 1SMA5928H suitable for automotive applications?
Yes, the 1SMA5928H is AEC-Q101 qualified and rated for junction temperatures from -55°C to +150°C, making it suitable for under-hood and infotainment power rail protection. Its glass passivated junction and Class 3B HBM ESD rating further support automotive-grade reliability requirements.
What is the maximum DC zener current for 1SMA5928H?
The maximum DC zener current for 1SMA5928H is 115 mA, calculated from its 1.5 W power rating and nominal 13 V zener voltage (IZM = PD/VZ). This value is confirmed in the Electrical Specifications table and assumes operation within derated thermal limits.
Does 1SMA5928H have moisture sensitivity level (MSL) restrictions?
No, the 1SMA5928H is rated MSL Level 1 per J-STD-020, meaning it has no floor life limitation and does not require dry pack or baking prior to reflow soldering. This simplifies manufacturing and eliminates moisture-related popcorning risk during assembly.
How does the dynamic impedance of 1SMA5928H affect regulation performance?
The 1SMA5928H exhibits 7.0 Ω dynamic impedance (ZZT) at 28.8 mA, which directly determines output voltage variation under load changes. For example, a 10 mA load step induces only ~70 mV deviation - critical for maintaining tight regulation in feedback networks of DC/DC controllers.
1SMA5928H 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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
1SMA5928H FAQ
1.How can I place an order for 1SMA5928H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5928H 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 1SMA5928H reliable?
The price and inventory of 1SMA5928H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5928H is usually 5 days.
3.What payment methods are accepted for 1SMA5928H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5928H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5928H?
1SMA5928H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5928H 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 1SMA5928H?
For technical support, including 1SMA5928H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5928H requirements.
6.How does Aetrix verify that 1SMA5928H is sourced from the original manufacturer or authorized distributors?
All 1SMA5928H 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 1SMA5928H meets industry standards.
7.What is the process for return or replacement of 1SMA5928H?
All 1SMA5928H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5928H, 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 1SMA5928H part is unused and in its original packaging.
Return procedure for 1SMA5928H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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