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Taiwan Semiconductor Corporation 1SMA4764H
- Part No.:
- 1SMA4764H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA4764H.pdf
- Description:
- DIODE ZENER 100V 1.25W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
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Product details
Overview
1SMA4764H from Taiwan Semiconductor is a surface-mount 100 V, 2.5 mA test-current Zener diode in DO-214AC (SMA) package, rated for 1 W steady-state power dissipation and 60 W non-repetitive peak surge power, with 350 Ω dynamic impedance at IZT and ≤0.25 µA leakage current at 76 V, used for voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the 1SMA4764H datasheet, 1SMA4764H pinout, 1SMA4764H application, or 1SMA4764H equivalent, key selection criteria include its AEC-Q101 qualification, ±5% zener voltage tolerance, low-inductance glass-passivated junction, moisture sensitivity level 1 rating, and compatibility with automated SMT placement on PCBs with 5 mm × 5 mm copper pads.
Technical Context
The 1SMA4764H operates as a single-die, unidirectional voltage reference device with a nominal breakdown voltage of 100 V at 2.5 mA test current, exhibiting a temperature coefficient of approximately +6.5 mV/°C in the 12–100 V range per Figure 8. Its 350 Ω zener impedance at IZT and 3000 Ω knee impedance at IZK define its regulation stiffness under varying load conditions.
It supports non-repetitive surge currents up to 45 A (derived from 60 W peak power at 100 V), complies with JESD201 Class 2 whisker resistance, and maintains stable operation across –55°C to +175°C junction temperature range, with thermal resistance RTHJA < 76.8 K/W enabling 1.25 W dissipation at 60°C ambient when mounted on specified PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 100 V ±5% at 2.5 mA - defines precise clamping threshold for 12 V–48 V system overvoltage protection circuits |
| Power Dissipation PD | 1 W continuous (TA = 25°C) - supports sustained regulation in compact SMT layouts without forced cooling |
| Zener Impedance ZZT | 350 Ω at IZT = 2.5 mA - indicates moderate regulation accuracy suitable for non-critical biasing and reference applications |
| Leakage Current IR | ≤0.25 µA at VR = 76 V - ensures minimal standby power loss in high-impedance sensing nodes |
| Surge Power PZSM | 60 W (100 µs pulse) - enables transient suppression of ISO 7637-2 Pulse 1/2a/5a events in automotive ECUs |
| Junction Temperature TJ | –55°C to +175°C - allows deployment in under-hood and industrial control environments without derating |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads solderable per J-STD-002; weight ≈ 0.060 g; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to ground or lower-potential rail during reverse-biased regulation operation |
| Cathode | Zener breakdown terminal / high-side clamping node | Connected to protected circuit node; conducts when input exceeds 100 V, shunting excess current to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated chip junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress vs. epoxy-passivated alternatives |
| Low inductance structure | Minimizes voltage overshoot during fast transients (e.g., load dump), critical for compliance with ISO 16750-2 |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free per IEC 61249-2-21 | Meets RoHS and ELV directive requirements for end-of-life recyclability and environmental compliance |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protects 24 V CAN bus interface ICs from load dump transients up to 60 V during battery disconnect events. IC Role / Device Role: Primary overvoltage clamp placed between VCC rail and ground, absorbing energy via controlled avalanche breakdown. Use Value: Withstands 60 W non-repetitive surge and maintains <0.25 µA leakage at 76 V, preserving signal integrity and minimizing quiescent current draw. |
Use Scenario: Shields 4–20 mA current loop receiver op-amps from field-wiring induced surges in factory automation cabinets. IC Role / Device Role: Front-end voltage limiter in analog front-end (AFE) stage, preventing saturation or latch-up of precision amplifiers. Use Value: 100 V clamping threshold provides 2× margin above 48 V system maximum, while DO-214AC footprint enables dense layout near connector entry points. |
| Telecom Power Supply Monitoring | Medical Diagnostic Equipment Bias Rails |
Use Scenario: Stabilizes reference voltage for supervisory ICs monitoring -48 V DC telecom rectifier outputs. IC Role / Device Role: Precision shunt reference providing stable 100 V node for comparator threshold setting. Use Value: ±5% VZ tolerance and +6.5 mV/°C tempco enable predictable trip-point behavior across –40°C to +85°C operating range. |
Use Scenario: Regulates auxiliary 100 V bias supply for photomultiplier tube (PMT) gain control in portable X-ray detectors. IC Role / Device Role: Low-noise, low-leakage voltage reference maintaining PMT dynode chain stability. Use Value: Glass passivation and <0.25 µA IR at 76 V prevent dark current drift and ensure consistent detector sensitivity over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor 1N4764A | Same 100 V ±5%, 1 W rating, but DO-41 through-hole package; higher ZZT = 400 Ω; no AEC-Q101 qualification | Requires PCB through-hole mounting; unsuitable for automotive SMT lines or high-density layouts | Select only for legacy through-hole designs where rework flexibility outweighs AEC-Q101 compliance needs |
| Vishay 1N5264B | 100 V ±5%, 0.5 W rating, DO-35 package; ZZT = 250 Ω; not AEC-Q101 qualified; max IFSM = 10 A | Limited to low-power signal-level clamping; insufficient for 24 V/48 V rail protection | Use only in sub-100 mW bias networks where space constraints preclude SMA footprint |
Compared with 1N4764A and 1N5264B, the 1SMA4764H delivers automotive-grade reliability, surface-mount compatibility, and 60 W surge capability-making it the sole option among the three qualified for under-hood ECU power rail protection without layout or qualification revalidation.
Availability
1SMA4764H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input stages, telecom power supervision circuits, and medical diagnostic equipment bias rails requiring stable component supply with full traceability and lifecycle continuity.
Supply support for 1SMA4764H 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 Zener regulators with global AEC-Q101 certification capabilities and ISO/TS 16949 quality systems.
The 1SMA47xxH series was designed specifically for automotive and industrial surface-mount voltage regulation and transient suppression, emphasizing robustness, tight tolerances, and compatibility with high-volume SMT assembly processes.
FAQ
What is the zener voltage tolerance for the 1SMA4764H?
The 1SMA4764H has a nominal zener voltage of 100 V with a standard tolerance of ±5%, meaning the actual measured VZ at 2.5 mA test current falls between 95 V and 105 V. This tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range of –55°C to +175°C, as confirmed in the Electrical Specifications table on page 2 of the Taiwan Semiconductor datasheet version A2102.
Is the 1SMA4764H suitable for automotive applications?
Yes, the 1SMA4764H is AEC-Q101 qualified and explicitly rated for automotive use, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock per the AEC-Q101-001 standard. Its DO-214AC package, moisture sensitivity level 1, and operation up to +175°C junction temperature make it appropriate for engine control units, body control modules, and ADAS power supplies.
What is the maximum non-repetitive surge current for the 1SMA4764H?
The 1SMA4764H supports a non-repetitive peak surge current of 45 A, derived from its 60 W peak surge power rating at 100 V (PZSM = VZ × ISM). This corresponds to a 100 µs square-wave pulse per Note 1 in the Absolute Maximum Ratings table and aligns with ISO 7637-2 Pulse 5a transient immunity requirements for 24 V automotive systems.
Does the 1SMA4764H have a specified temperature coefficient?
Yes, the 1SMA4764H exhibits a positive temperature coefficient of approximately +6.5 mV/°C for its zener voltage, as shown in Figure 8 (Temperature Coefficients) of the datasheet for devices in the 12–100 V range. This value reflects the change in VZ per degree Celsius rise in junction temperature and is critical for predicting regulation drift in wide-temperature applications like under-hood electronics.
What packaging and reel quantity is available for the 1SMA4764H?
The 1SMA4764H is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format per the Ordering Information table. The reel meets EIA-481 standards, with matte tin-plated leads compliant with J-STD-002 for solderability, and includes date code (YW), factory code (F), and part-specific marking "764A" visible on the cathode band side of the device body.
1SMA4764H 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):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 76 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)
1SMA4764H FAQ
1.How can I place an order for 1SMA4764H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA4764H 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 1SMA4764H reliable?
The price and inventory of 1SMA4764H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA4764H is usually 5 days.
3.What payment methods are accepted for 1SMA4764H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA4764H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA4764H?
1SMA4764H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA4764H 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 1SMA4764H?
For technical support, including 1SMA4764H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA4764H requirements.
6.How does Aetrix verify that 1SMA4764H is sourced from the original manufacturer or authorized distributors?
All 1SMA4764H 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 1SMA4764H meets industry standards.
7.What is the process for return or replacement of 1SMA4764H?
All 1SMA4764H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA4764H, 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 1SMA4764H part is unused and in its original packaging.
Return procedure for 1SMA4764H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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