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Taiwan Semiconductor Corporation 1SMA5933H
- Part No.:
- 1SMA5933H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5933H.pdf
- Description:
- DIODE ZENER 22V 1.5W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,403
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Product details
Overview
1SMA5933H from Taiwan Semiconductor is a surface-mount Zener diode rated for 1.5 W power dissipation, with a nominal zener voltage of 22 V (min 20.90 V, max 23.10 V) at 17.0 mA test current, dynamic impedance of 650 Ω at 17.5 mA, and maximum leakage current of 0.5 µA at 16.7 V reverse voltage - used for precision voltage regulation in DC/DC converters and SMPS feedback loops.
For engineers reviewing the 1SMA5933H datasheet, 1SMA5933H pinout, 1SMA5933H application, or 1SMA5933H equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package compatibility with automated placement, low-inductance glass-passivated junction, and guaranteed ±5% voltage tolerance at thermal equilibrium.
Technical Context
The 1SMA5933H operates as a single-die, unidirectional voltage regulator diode with cathode-band polarity indication. Its zener breakdown mechanism provides stable reference voltage under reverse bias, with specified regulation performance across -55°C to +150°C junction temperature range and validated ESD robustness (Class 3B HBM).
Designed for surface-mount assembly on 5 mm × 5 mm Cu pads, it delivers 1.5 W DC power dissipation at TL = 75°C with 20 mW/°C derating above that temperature. Its low-profile DO-214AC package supports high-density PCB layouts while maintaining UL 94V-0 flammability compliance and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.90–23.10 V at IZT = 17.0 mA - defines tight ±5% regulation window for stable reference generation |
| Power Dissipation (PD) | 1.5 W at TL = 75°C - sets thermal design boundary for board-level copper pad layout |
| Junction Temperature (TJ) | -55°C to +150°C - enables operation in automotive under-hood and industrial ambient environments |
| Dynamic Impedance (ZZT) | 650 Ω at IZT = 17.5 mA - determines output voltage variation under load transients |
| Leakage Current (IR) | < 0.5 µA at VR = 16.7 V - ensures minimal standby power loss in high-impedance bias networks |
| ESD Rating | Class 3B per JEDEC JESD22-A114 - withstands ≥8 kV HBM, supporting robust handling in manufacturing |
| Package | DO-214AC (SMA) - standardized SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode indicated by band, polarity-critical for reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side | Connected to ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output side | Connected to input rail and feedback network; voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control and body modules |
| Glass-passivated junction | Enhanced long-term stability and reduced parameter drift under thermal cycling |
| Low inductance construction | Minimizes voltage overshoot during fast transient events in switching regulators |
| Moisture sensitivity level 1 | Enables unlimited floor life without dry-pack requirements, simplifying SMT line logistics |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for end-product certification |
Applications
| Switching Mode Power Supply (SMPS) | On-Board DC/DC Converter |
|---|---|
Use Scenario: Primary-side overvoltage protection and secondary-side feedback reference in isolated flyback converters. IC Role / Device Role: Shunt voltage reference in optocoupler feedback loop, regulating output via TL431-compatible interface. Use Value: Tight 22 V ±5% tolerance ensures accurate output setpoint within 1% system error budget. |
Use Scenario: Input rail monitoring and undervoltage lockout (UVLO) threshold setting in point-of-load regulators. IC Role / Device Role: Precision clamp for enable/disable logic tied to 24 V intermediate bus. Use Value: Low 0.5 µA leakage preserves battery-backed retention in always-on subsystems. |
| Lighting Application | Adapter |
Use Scenario: Constant-current LED driver reference in commercial LED troffer ballasts. IC Role / Device Role: Voltage reference for current-sense amplifier biasing in analog dimming circuits. Use Value: 650 Ω dynamic impedance limits output variation to <15 mV under 10 mA load step. |
Use Scenario: Output voltage stabilization in universal-input AC/DC adapters for consumer electronics. IC Role / Device Role: Secondary-side zener clamp protecting synchronous rectifier gate drive signals. Use Value: AEC-Q101 qualification ensures field reliability despite repeated thermal stress during plug-in cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 22 V nominal, 1 W rating, DO-41 through-hole package, no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive under-hood use due to package and qualification gap | Select only for legacy through-hole designs where rework tolerance and cost outweigh thermal/power needs |
| BZX84-C22 | 22 V nominal, 300 mW rating, SOT-23 package, ±5% tolerance, no AEC-Q101 | Limited to low-power signal-level clamping; insufficient for 1.5 W regulator duty in power stages | Prefer for space-constrained logic-level protection, not for power supply regulation |
Compared with 1SMA5933H, the 1N4742A requires manual assembly and lacks automotive qualification, while BZX84-C22 cannot sustain required power - making 1SMA5933H the only qualified, surface-mount, 1.5 W solution for 22 V regulation in production-grade power systems.
Availability
1SMA5933H is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply with AEC-Q101 assurance and tape-and-reel delivery.
Supply support for 1SMA5933H 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 automotive, industrial, and consumer markets.
The 1SMA5933H belongs to TSC's AEC-Q101-qualified SMA Zener series, engineered specifically for high-reliability voltage regulation in automotive power systems and industrial switch-mode supplies.
FAQ
What is the zener voltage tolerance of the 1SMA5933H?
The 1SMA5933H has a zener voltage tolerance of ±5%, with a nominal value of 22 V and guaranteed limits of 20.90 V (minimum) and 23.10 V (maximum) at 17.0 mA test current. This tolerance is specified at thermal equilibrium per the manufacturer's datasheet revision A2102 and applies directly to the 1SMA5933H device under standard test conditions.
Is the 1SMA5933H suitable for automotive applications?
Yes, the 1SMA5933H is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and ESD required for automotive electronic components. Its -55°C to +150°C junction temperature range and Class 3B HBM ESD rating make it appropriate for engine control units, body electronics, and infotainment power rails - all verified for the 1SMA5933H in Taiwan Semiconductor's official qualification report.
What is the maximum DC zener current for the 1SMA5933H?
The maximum DC zener current (IZM) for the 1SMA5933H is 68 mA, calculated from its 1.5 W power rating and minimum zener voltage (20.90 V). This value is explicitly listed in the Electrical Specifications table of the datasheet and reflects the highest continuous reverse current the 1SMA5933H can safely conduct without exceeding thermal limits at TL = 75°C.
Does the 1SMA5933H have a defined polarity marking?
Yes, the 1SMA5933H uses a cathode band to indicate polarity - a visible marking on the DO-214AC (SMA) package body. This band identifies the cathode terminal, which must be connected to the higher-potential node in zener regulator configurations. The polarity marking is confirmed in the Mechanical Data section and Marking Diagram of the 1SMA5933H datasheet.
What is the thermal derating behavior of the 1SMA5933H above 75°C?
The 1SMA5933H derates linearly at 20 mW/°C above 75°C lead temperature (TL), based on mounting on a 5 mm × 5 mm copper pad. At 100°C TL, its usable power drops to 1.0 W; at 125°C, to 0.5 W. This derating curve is documented in Figure 1 (Steady State Power Derating) of the 1SMA5933H datasheet and applies strictly to the 1SMA5933H under the stated test conditions.
1SMA5933H 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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 17.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 16.7 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)
1SMA5933H FAQ
1.How can I place an order for 1SMA5933H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5933H 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 1SMA5933H reliable?
The price and inventory of 1SMA5933H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5933H is usually 5 days.
3.What payment methods are accepted for 1SMA5933H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5933H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5933H?
1SMA5933H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5933H 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 1SMA5933H?
For technical support, including 1SMA5933H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5933H requirements.
6.How does Aetrix verify that 1SMA5933H is sourced from the original manufacturer or authorized distributors?
All 1SMA5933H 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 1SMA5933H meets industry standards.
7.What is the process for return or replacement of 1SMA5933H?
All 1SMA5933H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5933H, 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 1SMA5933H part is unused and in its original packaging.
Return procedure for 1SMA5933H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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