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Taiwan Semiconductor Corporation 1SMA5936H
- Part No.:
- 1SMA5936H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5936H.pdf
- Description:
- DIODE ZENER 30V 1.5W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,820
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Product details
Overview
1SMA5936H from Taiwan Semiconductor is a surface-mount Zener diode engineered for precision voltage regulation at 30 V nominal, with ±5% tolerance (28.5–31.5 V), 1.5 W power dissipation, 12.5 Ω dynamic impedance at 26 mA test current, and <0.5 µA leakage at 22.8 V reverse bias - deployed in DC/DC converters, LED drivers, and industrial power supplies.
For engineers reviewing the 1SMA5936H datasheet, 1SMA5936H pinout, 1SMA5936H application, or 1SMA5936H equivalent, key selection criteria include its DO-214AC (SMA) package compatibility with automated placement, AEC-Q101 qualification for automotive-grade reliability, glass-passivated junction for stable long-term performance, and low-inductance design critical for high-frequency regulation stability.
Technical Context
The 1SMA5936H operates as a single-die, unidirectional Zener regulator with cathode-band polarity indication and a junction temperature range of –55°C to +150°C. Its electrical behavior is defined by tight voltage regulation (±5%), low dynamic impedance (12.5 Ω at IZT = 26 mA), and minimal leakage (<0.5 µA at VR = 22.8 V).
Thermal derating begins at 75°C (20 mW/°C reduction), and maximum DC zener current is 50 mA. The device meets JEDEC Class 3B HBM ESD rating and J-STD-020 Level 1 moisture sensitivity - confirming suitability for reflow-soldered automotive and industrial assemblies without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5–31.5 V at 26 mA - ensures stable 30 V reference under typical regulation load |
| Power Dissipation (PD) | 1.5 W at TL = 75°C - supports continuous operation in compact PCB layouts with copper thermal relief |
| Dynamic Impedance (ZZT) | 12.5 Ω at IZT = 26 mA - minimizes output voltage variation during load transients |
| Leakage Current (IR) | <0.5 µA at VR = 22.8 V - enables low-power standby regulation without significant quiescent loss |
| Junction Temperature (TJ) | –55°C to +150°C - validated for under-hood automotive and industrial ambient environments |
| ESD Rating | Class 3B (HBM) per JEDEC - withstands ≥8 kV human-body-model discharge without parametric shift |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline compatible with IPC-7351B footprint |
Pinout & Package
Package: DO-214AC (SMA), molded epoxy case with matte tin-plated leads, cathode indicated by band, weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in shunt regulation; defines reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail; clamps voltage to VZ when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, and HAST |
| Glass passivated chip junction | Eliminates surface contamination risk and improves long-term VZ stability over temperature and time |
| Low inductance construction | Enables effective high-frequency noise suppression in switching regulator feedback paths |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - reduces manufacturing overhead and avoids thermal damage |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Feedback Reference |
|---|---|
Use Scenario: Regulating 30 V intermediate bus in vehicle infotainment power tree with wide input transients. IC Role / Device Role / Timing Role: Shunt voltage reference for TL431-based error amplifier feedback network. Use Value: Tight ±5% VZ tolerance and 12.5 Ω ZZT ensure <±1.5% output accuracy across –40°C to +125°C ambient. |
Use Scenario: Providing stable 30 V reference in 48 V-to-12 V isolated flyback converter for PLC I/O modules. IC Role / Device Role / Timing Role: Precision clamp on optocoupler input side to maintain consistent regulation setpoint. Use Value: <0.5 µA leakage at 22.8 V prevents false triggering during low-load standby modes. |
| LED Driver Overvoltage Protection | Test Equipment Voltage Calibration Reference |
Use Scenario: Safeguarding constant-current LED driver ICs against 30 V rail overvoltage events. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered at 30 V to divert surge energy away from driver FETs. Use Value: 10 A peak forward surge rating (8.3 ms half-sine) absorbs transient energy without failure. |
Use Scenario: Serving as traceable 30 V calibration point in portable multimeter reference subsystems. IC Role / Device Role / Timing Role: Primary voltage standard in self-calibration loop with temperature-compensated divider network. Use Value: Glass-passivated junction ensures <50 ppm/°C VZ drift and <0.1% long-term drift over 10,000 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 30 V nominal, ±5%, 1 W PD, DO-41 through-hole package | Not AEC-Q101 qualified; lacks automotive reliability validation and surface-mount compatibility | Select only for non-automotive, low-volume prototyping where manual assembly is acceptable |
| BZX84-C30 | 30 V nominal, ±5%, 300 mW PD, SOT-23 package, higher ZZT (35 Ω) | Lower power handling and higher impedance limit use to low-current signal-level references | Prefer for space-constrained logic-level biasing, not for power regulation or surge protection |
Compared with 1SMA5936H, the 1N4749A offers identical voltage but lacks automotive qualification and surface-mount capability, while the BZX84-C30 trades power robustness and regulation precision for ultra-small size - making 1SMA5936H the sole choice for AEC-Q101-compliant, 1.5 W, SMA-packaged 30 V regulation.
Availability
1SMA5936H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS designs, and LED driver protection circuits requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1SMA5936H 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, specializing in high-reliability power devices and protection components.
The 1SMA59xxH series was developed specifically for AEC-Q101-compliant voltage regulation in automotive power systems and industrial switching supplies - emphasizing thermal stability, low leakage, and automated assembly readiness.
FAQ
What is the Zener voltage tolerance of the 1SMA5936H?
The 1SMA5936H has a nominal Zener voltage of 30 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 28.5 V and maximum of 31.5 V at 26 mA test current (IZT). This tolerance is specified at thermal equilibrium and applies across the full operating temperature range of –55°C to +150°C. The 1SMA5936H achieves this via laser-trimmed silicon junction and glass passivation for long-term stability.
Is the 1SMA5936H suitable for automotive applications?
Yes, the 1SMA5936H is AEC-Q101 qualified and explicitly designed for automotive use, having passed high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST). Its DO-214AC (SMA) package, matte tin-plated leads, and Level 1 moisture sensitivity enable direct integration into reflow-soldered automotive control units without preconditioning. The 1SMA5936H is commonly used in infotainment DC/DC converters and body-control module voltage references.
What is the maximum DC zener current for the 1SMA5936H?
The maximum DC zener current (IZM) for the 1SMA5936H is 50 mA, calculated from its 1.5 W power rating and nominal 30 V Zener voltage (PD/VZ ≈ 50 mA). This value is confirmed in the Electrical Specifications table and assumes operation at TL = 75°C with proper PCB thermal relief. At higher ambient temperatures, derating applies at 20 mW/°C above 75°C. The 1SMA5936H maintains regulation integrity up to this IZM limit.
Does the 1SMA5936H have a specified dynamic impedance?
Yes, the 1SMA5936H has a maximum dynamic impedance (ZZT) of 12.5 Ω, measured at the test current IZT = 26 mA. This low impedance ensures minimal output voltage deviation during rapid load changes - a critical parameter for feedback-loop stability in switching regulators. The 1SMA5936H also specifies ZZK ≤ 750 Ω at IZK = 0.25 mA, confirming usable regulation even near knee voltage.
What packaging and reel quantity is available for the 1SMA5936H?
The 1SMA5936H is supplied in DO-214AC (SMA) package format on 7,500-unit tape-and-reel carriers, compliant with EIA-481 standards. Each reel includes full traceability data, date code (YW), factory code (F), and green compound marking (G) per the manufacturer's suggested pad layout documentation. The 1SMA5936H reel configuration supports high-speed pick-and-place equipment with verified coplanarity and lead integrity.
1SMA5936H 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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 26 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 22.8 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)
1SMA5936H FAQ
1.How can I place an order for 1SMA5936H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5936H 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 1SMA5936H reliable?
The price and inventory of 1SMA5936H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5936H is usually 5 days.
3.What payment methods are accepted for 1SMA5936H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5936H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5936H?
1SMA5936H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5936H 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 1SMA5936H?
For technical support, including 1SMA5936H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5936H requirements.
6.How does Aetrix verify that 1SMA5936H is sourced from the original manufacturer or authorized distributors?
All 1SMA5936H 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 1SMA5936H meets industry standards.
7.What is the process for return or replacement of 1SMA5936H?
All 1SMA5936H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5936H, 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 1SMA5936H part is unused and in its original packaging.
Return procedure for 1SMA5936H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA5936H Tags
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