My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SML4764AHE3_A/I
- Part No.:
- SML4764AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4764AHE3_A/I.pdf
- Description:
- DIODE ZENER 100V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,343
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SML4764AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 100 V, ±5 % tolerance (suffix A), 2.5 mA test current, 76 Ω dynamic impedance at IZT, and 3000 mApk surge current rating. It operates in single-diode configuration within the SMA (DO-214AC) package and is used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the SML4764AHE3_A/I datasheet, SML4764AHE3_A/I pinout, SML4764AHE3_A/I application, or SML4764AHE3_A/I equivalent, this device is selected for stable reference generation in industrial power supplies, automotive ECU voltage clamping, and high-voltage sensor biasing where tight voltage tolerance and low dynamic impedance are critical.
Technical Context
This Zener diode functions as a two-terminal voltage reference with reverse-biased operation, delivering regulated output across its cathode-anode terminals when reverse current exceeds IZT = 2.5 mA. Its 100 V nominal breakdown voltage is specified at 25 °C with temperature coefficient of +110 mV/°C (typical), and it maintains regulation up to Tj = 150 °C.
The device exhibits low regulation factor due to 76 Ω dynamic impedance at IZT, enabling stable output under varying load conditions. It is RoHS-compliant, AEC-Q101 qualified (denoted by HE3_A/I suffix), and rated for peak soldering temperature of 260 °C/10 s - confirming suitability for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V nominal, ±5 % tolerance - ensures precise clamping at high-voltage rails without recalibration. |
| Test Current (IZT) | 2.5 mA - defines operating point for guaranteed VZ specification and low-impedance regulation. |
| Dynamic Impedance (ZZ) | 76 Ω at IZT - minimizes output voltage variation under load transients in feedback or protection circuits. |
| Surge Current (IRM) | 45 mApk (non-repetitive, 8.3 ms) - withstands transient overvoltage events per JEDEC method. |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports continuous operation in thermally managed PCB layouts. |
| Junction Temperature (Tj) | 150 °C maximum - enables reliable use in under-hood automotive and industrial ambient environments. |
Pinout & Package
SMA (DO-214AC) surface-mount package: 2-terminal, molded plastic case with cathode band marking; dimensions 4.93 mm × 3.99 mm × 2.29 mm; weight 64 mg; UL 94 V-0 flammability rating; MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to system ground or lower-potential rail during reverse-bias regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to protected or referenced node; carries reverse current to maintain 100 V clamp. |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables tighter voltage margin control vs. standard ±10 % parts, reducing need for post-regulation trimming. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and body modules requiring extended reliability. |
| Low dynamic impedance (76 Ω) | Improves regulation stability under dynamic load changes in switching power supply feedback paths. |
| 260 °C/10 s soldering endurance | Guarantees robustness during reflow assembly without parameter shift or bond degradation. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to assembly, streamlining manufacturing for high-volume production. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC Power Supply Clamp |
|---|---|
Use Scenario: Clamping transient spikes on 12 V/24 V battery-supplied microcontroller I/O lines during load dump events. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector for MCU GPIO and analog sensor inputs. Use Value: Limits voltage to ≤105 V (100 V + 5 % tolerance) during 100 V surge events, preventing latch-up or damage to 5 V/3.3 V logic interfaces. |
Use Scenario: Stabilizing reference voltage for error amplifier in 48 V telecom rectifier output stage. IC Role / Device Role / Timing Role: Precision voltage reference element in feedback divider network for isolated DC-DC controller. Use Value: Provides 100 V reference with <76 Ω impedance, minimizing gain error drift across temperature and line variations. |
| High-Voltage Sensor Biasing | LED Driver Overvoltage Protection |
Use Scenario: Supplying stable bias voltage to photodiode or Hall-effect sensor operating near 100 V bus potential. IC Role / Device Role / Timing Role: Passive voltage regulator establishing fixed bias point independent of supply ripple. Use Value: Maintains ±5 % accuracy over -65 °C to +150 °C, ensuring consistent sensor offset and linearity in harsh environments. |
Use Scenario: Protecting constant-current LED driver IC from input overvoltage during hot-swap or capacitor charging surges. IC Role / Device Role / Timing Role: Shunt limiter placed across driver input capacitors to clamp transient excursions. Use Value: Absorbs 3000 mApk surge energy without failure, preserving driver IC integrity during 100 V+ line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C100,115 | 100 V ±5 %, SOT-23 package, 250 mW Ptot, 100 Ω ZZ | Lower power rating limits use to low-current bias/reference roles; not suitable for >250 mW clamping. | Select when board space is constrained and power dissipation remains below 250 mW. |
| 1N4764A-TAP | 100 V ±5 %, DO-41 through-hole, 1000 mW Ptot, 76 Ω ZZ, no AEC-Q101 qualification | Lacks automotive qualification and SMT compatibility; requires wave soldering or hand assembly. | Select for legacy through-hole designs where AEC-Q101 compliance is not required. |
Compared with BZX84-C100,115 and 1N4764A-TAP, the SML4764AHE3_A/I uniquely combines AEC-Q101 qualification, SMA surface-mount compatibility, and full 1000 mW power handling - making it the only option validated for automotive SMT power rail protection at 100 V.
Availability
SML4764AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial DC power supply clamping, and high-voltage sensor biasing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SML4764AHE3_A/I 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, precision, and automotive-grade validation.
The SML47xxA series is part of Vishay's surface-mount Zener diode product line, engineered for high-stability voltage regulation and transient suppression in automotive, industrial, and telecom power systems.
FAQ
What is the Zener voltage tolerance of the SML4764AHE3_A/I?
The SML4764AHE3_A/I has a nominal Zener voltage of 100 V with ±5 % tolerance, as indicated by the "A" suffix in the part number. This tighter tolerance enables higher accuracy in voltage reference and clamping applications compared to standard ±10 % Zeners. The SML4764AHE3_A/I is tested at 2.5 mA to guarantee this specification across temperature and production lots.
Is the SML4764AHE3_A/I qualified for automotive applications?
Yes, the SML4764AHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3_A/I" ordering code - where "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life, making the SML4764AHE3_A/I suitable for under-hood and chassis-mounted automotive electronics.
What is the maximum power dissipation of the SML4764AHE3_A/I?
The SML4764AHE3_A/I has a maximum power dissipation of 1000 mW at lead temperature (TL) = 75 °C, per the Absolute Maximum Ratings table. Derating applies above 75 °C, with zero power allowed at 150 °C junction temperature. This rating assumes proper PCB copper thermal relief and is validated for the SMA (DO-214AC) package mounted on standard FR-4 with 8 mm × 8 mm copper pads.
Does the SML4764AHE3_A/I have a defined surge current rating?
Yes, the SML4764AHE3_A/I is rated for 3000 mApk non-repetitive surge current, defined per JEDEC method as an 8.3 ms pulse width square wave superimposed on the 2.5 mA test current. This value appears in the Electrical Characteristics table as IRM = 45 mApk at VR = 100 V, confirming its capability to absorb transient energy without parametric shift or failure.
What package type does the SML4764AHE3_A/I use?
The SML4764AHE3_A/I uses the SMA (DO-214AC) surface-mount package: a 2-terminal, molded plastic case with cathode band marking, measuring 4.93 mm × 3.99 mm × 2.29 mm. It complies with MSL Level 1, requires no baking before reflow, and supports 260 °C/10 s soldering - making it compatible with standard high-volume SMT assembly processes.
SML4764AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 76 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SML4764AHE3_A/I FAQ
1.How can I place an order for SML4764AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4764AHE3_A/I 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 SML4764AHE3_A/I reliable?
The price and inventory of SML4764AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SML4764AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4764AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4764AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4764AHE3_A/I?
SML4764AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4764AHE3_A/I 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 SML4764AHE3_A/I?
For technical support, including SML4764AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4764AHE3_A/I requirements.
6.How does Aetrix verify that SML4764AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4764AHE3_A/I 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 SML4764AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4764AHE3_A/I?
All SML4764AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4764AHE3_A/I, 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 SML4764AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4764AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SML4764AHE3_A/I Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
