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Taiwan Semiconductor Corporation 1SMA5929H
- Part No.:
- 1SMA5929H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA5929H.pdf
- Description:
- DIODE ZENER 15V 1.5W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,879
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Product details
Overview
1SMA5929H from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 15 V, 1.5 W power rating, 25.0 Ω dynamic impedance at 25 mA test current, and DO-214AC (SMA) package. It delivers stable voltage regulation in DC/DC converters and SMPS feedback loops where precision clamping and low leakage (<0.5 µA at 11.4 V) are required.
For engineers reviewing the 1SMA5929H datasheet, 1SMA5929H pinout, 1SMA5929H application, or 1SMA5929H equivalent, key selection criteria include its ±5% VZ tolerance, AEC-Q101 qualification for automotive-grade reliability, JEDEC Class 3B HBM ESD rating, and 150°C maximum junction temperature - all verified under thermal equilibrium conditions.
Technical Context
The 1SMA5929H operates as a single-die, glass-passivated Zener diode optimized for stable reverse-biased voltage regulation. Its 15 V nominal breakdown is specified at IZT = 25.0 mA, with ZZT = 9.0 Ω and ZZK = 600 Ω at IZK = 0.25 mA, enabling precise low-current reference and overvoltage protection.
Designed for surface-mount assembly on 5 mm × 5 mm Cu pads, it features low inductance, matte tin-plated leads compliant with J-STD-002, and meets UL 94V-0 flammability and JESD 201 Class 2 whisker resistance standards. Polarity is marked by cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 15 V - Stable regulation point at 25 mA test current, ±5% tolerance ensures predictable clamping in feedback networks. |
| PD | 1.5 W - Maximum steady-state dissipation at TL = 75°C; derates 20 mW/°C above 75°C on standard Cu pad. |
| ZZT @ IZT | 9.0 Ω - Low dynamic impedance ensures minimal voltage shift under load variation in regulation circuits. |
| IR @ VR | <0.5 µA at 11.4 V - Ultra-low leakage preserves accuracy in high-impedance bias/reference paths. |
| TJMAX | 150°C - Enables operation in under-hood automotive and industrial environments without thermal derating. |
| Package | DO-214AC (SMA) - Standardized SMD outline compatible with automated pick-and-place and reflow profiles. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units and body electronics. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; anode and cathode terminals formed as gull-wing leads; weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt regulator | Connected to system ground or lower-potential rail; carries forward current during transient events. |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to regulated voltage node; maintains 15 V relative to anode when reverse-biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Confirms robustness for automotive powertrain and chassis systems requiring zero-failure reliability. |
| Class 3B HBM ESD rating | Withstands ≥8 kV human-body-model discharge, reducing risk of field failure during handling and assembly. |
| Moisture sensitivity Level 1 | Eliminates bake requirements before reflow, simplifying manufacturing and reducing process cost. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained industrial and consumer designs. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC/DC Converter |
|---|---|
Use Scenario: Voltage reference and overvoltage clamp in microcontroller power supply monitoring circuitry. IC Role / Device Role / Timing Role: Shunt regulator providing stable 15 V reference for analog comparators and ADC input protection. Use Value: Tight ±5% VZ tolerance and low ZZT ensure accurate trip-point detection across -40°C to +125°C ambient. |
Use Scenario: Output voltage regulation feedback element in isolated flyback converter secondary side. IC Role / Device Role / Timing Role: Precision Zener reference connected to optocoupler input for primary-side regulation loop closure. Use Value: 9.0 Ω dynamic impedance minimizes feedback error under load transients, improving output regulation to ±1.5%. |
| LED Driver Power Supply | Switching Mode Power Supply (SMPS) |
Use Scenario: Overvoltage protection for constant-current LED string driver ICs. IC Role / Device Role / Timing Role: Clamping device limiting gate drive voltage to protect MOSFETs and driver ICs during surge events. Use Value: 1.5 W power rating and 10 A IFSM enable reliable energy absorption during 8.3 ms half-sine surges. |
Use Scenario: Secondary-side voltage sensing and regulation in AC/DC adapter designs. IC Role / Device Role / Timing Role: Zener-based reference for TL431-type feedback networks in offline SMPS. Use Value: Low leakage (<0.5 µA) prevents reference current error in high-resistance divider configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal VZ, 1 W rating, DO-41 through-hole package, no AEC-Q101 qualification | Not suitable for automotive or high-reliability SMT production; requires manual insertion or wave soldering | Select only for cost-sensitive prototyping or non-automotive legacy board refreshes. |
| BZX84-C15 | 15 V nominal VZ, 300 mW rating, SOT-23 package, ±5% tolerance, no AEC-Q101 or Class 3B ESD | Limited power handling restricts use to signal-level clamping; unsuitable for power rail regulation | Use only in low-power logic interface protection where 1.5 W dissipation is unnecessary. |
Compared with 1SMA5929H, the 1N4744A lacks surface-mount compatibility and automotive qualification, while the BZX84-C15 sacrifices 5× power capability and fails to meet critical reliability standards - making 1SMA5929H the sole choice for AEC-Q101-compliant, 15 V, 1.5 W SMT Zener regulation.
Availability
1SMA5929H is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC/DC converters, and LED driver power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1SMA5929H 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 with global distribution and ISO/TS 16949 certification.
The 1SMA5929H belongs to TSC's AEC-Q101-qualified SMA Zener family, engineered specifically for high-stability voltage regulation in automotive and industrial power conversion systems where reliability under thermal stress is critical.
FAQ
What is the exact zener voltage tolerance for 1SMA5929H?
The 1SMA5929H has a ±5% zener voltage tolerance, with guaranteed minimum/maximum values of 14.25 V and 15.75 V at IZT = 25.0 mA under thermal equilibrium conditions. This tolerance is explicitly defined in the Electrical Specifications table and applies across the full operating temperature range of -55°C to +150°C.
Is 1SMA5929H qualified for automotive applications?
Yes, the 1SMA5929H is AEC-Q101 qualified, meaning it has passed stress tests for high-temperature operating life, temperature cycling, mechanical shock, and ESD per JEDEC standards. This qualification confirms suitability for under-hood and chassis-mounted automotive electronics, including engine control modules and body control units.
What is the maximum peak forward surge current rating for 1SMA5929H?
The 1SMA5929H supports a peak forward surge current (IFSM) of 10 A for an 8.3 ms single half-sine waveform at TA = 25°C. This rating enables robust transient handling during power-up surges and fault conditions in switching power supplies and motor drivers.
Does 1SMA5929H require moisture baking before reflow soldering?
No, the 1SMA5929H has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without preconditioning or baking - simplifying SMT line integration and reducing manufacturing overhead.
How does the dynamic impedance of 1SMA5929H affect regulation accuracy?
The 1SMA5929H exhibits ZZT = 9.0 Ω at IZT = 25.0 mA, which limits voltage deviation to <±0.225 V for ±25 mA load current changes. This low impedance ensures tight regulation in feedback loops and reference circuits where output stability under varying load is essential.
1SMA5929H 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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 11.4 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)
1SMA5929H FAQ
1.How can I place an order for 1SMA5929H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA5929H 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 1SMA5929H reliable?
The price and inventory of 1SMA5929H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA5929H is usually 5 days.
3.What payment methods are accepted for 1SMA5929H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA5929H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA5929H?
1SMA5929H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA5929H 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 1SMA5929H?
For technical support, including 1SMA5929H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA5929H requirements.
6.How does Aetrix verify that 1SMA5929H is sourced from the original manufacturer or authorized distributors?
All 1SMA5929H 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 1SMA5929H meets industry standards.
7.What is the process for return or replacement of 1SMA5929H?
All 1SMA5929H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA5929H, 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 1SMA5929H part is unused and in its original packaging.
Return procedure for 1SMA5929H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA5929H Tags
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