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Taiwan Semiconductor Corporation 1SMA4759H
- Part No.:
- 1SMA4759H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA4759H.pdf
- Description:
- DIODE ZENER 62V 1.25W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,460
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Product details
Overview
1SMA4759H from Taiwan Semiconductor is a surface-mount 1 W Zener diode with nominal zener voltage 62 V ±5%, test current 4.0 mA, dynamic impedance 125 Ω at IZT, and maximum leakage current 0.25 µA at 47.1 V. It operates from −55 °C to +175 °C and is used for voltage regulation and overvoltage protection in power supply rails and I/O interface circuits.
For engineers reviewing the 1SMA4759H datasheet, 1SMA4759H pinout, 1SMA4759H application, or 1SMA4759H equivalent, key selection criteria include zener voltage tolerance, surge current capability (70 A), thermal derating behavior, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The 1SMA4759H employs a glass-passivated silicon junction optimized for stable reverse breakdown under DC and transient conditions. Its 125 Ω dynamic impedance at 4.0 mA ensures predictable regulation across load variations, while low inductance supports fast transient response in clamping applications.
Designed for DO-214AC (SMA) package mounting, it delivers 60 W non-repetitive peak surge power (tp = 100 µs) and maintains ≤0.25 µA leakage at 80% of VZ (47.1 V), enabling low-power standby circuit protection without parasitic drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - defines precise clamping threshold for 48 V system protection |
| Test Current (IZT) | 4.0 mA - operating point where VZ and ZZT are guaranteed |
| Zener Impedance (ZZT) | 125 Ω - limits regulation error under varying load current |
| Power Dissipation (PD) | 1 W at 25 °C - sets continuous thermal limit on PCB with 5 mm × 5 mm Cu pad |
| Leakage Current (IR) | ≤0.25 µA at 47.1 V - ensures negligible standby current in battery-backed circuits |
| Surge Current (ISM) | 70 A (non-repetitive, 8.3 ms half-sine) - handles common ESD and load-dump transients |
| Junction Temperature (TJ) | −55 °C to +175 °C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, cathode indicated by band. Weight: 0.060 g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during regulation; enables standard orientation on PCB |
| Cathode | Zener breakdown terminal | Marked by band; connected to higher-potential rail to clamp overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HAST) |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling |
| Low inductance construction | Minimizes voltage overshoot during fast transients (e.g., ISO 7637-2 pulse 1/2a) |
| Moisture sensitivity level 1 | Enables direct placement without baking; compatible with standard SMT reflow profiles |
| RoHS and halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 12 V/24 V/48 V bus lines against load dump and jump-start surges in engine control units and body modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and transient voltage suppressor. Use Value: Withstands 70 A surge current and maintains <0.25 µA leakage at 47.1 V, preserving low-power sleep modes. | Use Scenario: Stabilizing reference voltage for analog front-ends in temperature, pressure, and current sensors. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent biasing of op-amps and ADC inputs. Use Value: 62 V ±5% tolerance and 125 Ω dynamic impedance enable repeatable 5 V or 3.3 V derived rail regulation. |
| Telecom DC-DC Converter Feedback | Consumer USB-C Power Delivery Clamp |
Use Scenario: Providing stable feedback reference in isolated flyback converters for base station power supplies. IC Role / Device Role / Timing Role: Zener diode in optocoupler feedback loop to regulate secondary-side output voltage. Use Value: 175 °C max junction temperature allows reliable operation near high-loss magnetics and MOSFETs. | Use Scenario: Overvoltage protection on VBUS lines in portable chargers and docking stations compliant with USB PD 3.0. IC Role / Device Role / Timing Role: Standby-mode clamping device limiting VBUS to safe levels during fault conditions. Use Value: Low 0.060 g mass and DO-214AC footprint support compact, high-density PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor 1N4759A | Same 62 V ±5%, but 1.5 W rating and DO-41 through-hole package | Requires PCB redesign for through-hole mounting; higher thermal resistance | Select when higher continuous power margin is needed and SMT is not required |
| Vishay SMAZ62 | 62 V ±5%, 1 W, DO-214AC, but AEC-Q101 not specified; typical IR = 1 µA at 47.1 V | Lacks automotive qualification; higher leakage may affect ultra-low-power designs | Select for cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with 1N4759A and SMAZ62, the 1SMA4759H uniquely combines AEC-Q101 qualification, 0.25 µA leakage ceiling, and DO-214AC SMT compatibility-making it optimal for space-constrained, automotive-grade voltage regulation where reliability and standby efficiency are critical.
Availability
1SMA4759H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and telecom DC-DC converter feedback requiring stable component supply and full traceability.
Supply support for 1SMA4759H 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, TVS diodes, and rectifiers with global distribution and AEC-Q101 validation capabilities.
The 1SMA47xxH series targets high-reliability surface-mount Zener regulation, designed specifically for automotive, industrial, and telecom applications demanding tight voltage tolerance, low leakage, and robust surge immunity.
FAQ
What is the zener voltage tolerance for 1SMA4759H?
The 1SMA4759H has a nominal zener voltage of 62 V with a standard tolerance of ±5%, meaning the actual measured VZ falls between 58.9 V and 65.1 V at 4.0 mA test current and 30 °C lead temperature. This tolerance is confirmed per JEDEC registration and applies to all units in the 1SMA47xxH family.
Is 1SMA4759H suitable for automotive applications?
Yes, the 1SMA4759H is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its −55 °C to +175 °C junction temperature range and DO-214AC package make it appropriate for under-hood and transmission-control module use.
What is the maximum non-repetitive surge current for 1SMA4759H?
The 1SMA4759H supports a non-repetitive peak forward surge current (IFSM) of 30 A for an 8.3 ms half-sine wave, and a non-repetitive peak reverse surge current of 70 A under the same waveform-verified per JEDEC standards and documented in the electrical characteristics table.
Does 1SMA4759H require moisture preconditioning before reflow?
No, the 1SMA4759H has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into standard SMT reflow ovens without baking or dry-pack handling.
What is the zener impedance of 1SMA4759H and why does it matter?
The 1SMA4759H has a zener impedance (ZZT) of 125 Ω at 4.0 mA test current. This value determines how tightly the diode regulates voltage under changing load conditions-lower impedance yields smaller output voltage variation, critical for precision reference and feedback applications.
1SMA4759H 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):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 47.1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
1SMA4759H FAQ
1.How can I place an order for 1SMA4759H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA4759H 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 1SMA4759H reliable?
The price and inventory of 1SMA4759H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA4759H is usually 5 days.
3.What payment methods are accepted for 1SMA4759H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA4759H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA4759H?
1SMA4759H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA4759H 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 1SMA4759H?
For technical support, including 1SMA4759H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA4759H requirements.
6.How does Aetrix verify that 1SMA4759H is sourced from the original manufacturer or authorized distributors?
All 1SMA4759H 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 1SMA4759H meets industry standards.
7.What is the process for return or replacement of 1SMA4759H?
All 1SMA4759H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA4759H, 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 1SMA4759H part is unused and in its original packaging.
Return procedure for 1SMA4759H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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