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Vishay General Semiconductor - Diodes Division SML4753AHE3_A/I
- Part No.:
- SML4753AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4753AHE3_A/I.pdf
- Description:
- DIODE ZENER 36V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,371
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Product details
Overview
SML4753AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 36 V, ±5 % tolerance (suffix A), 7 mA test current, and 1000 mW power dissipation at TL = 75 °C. It features low dynamic impedance (27.4 Ω at IZT), low regulation factor, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the SML4753AHE3_A/I datasheet, SML4753AHE3_A/I pinout, SML4753AHE3_A/I application, or SML4753AHE3_A/I equivalent, this device serves as a precision voltage reference and overvoltage clamp in DC power rails, voltage regulation feedback loops, and ESD-protected sensor interfaces where stable 36 V stabilization under transient surge conditions is required.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals. Its 36 V nominal zener voltage is specified at 7 mA test current (IZT1), with dynamic impedance measured at that same current and temperature coefficient optimized for minimal drift over -65 °C to +150 °C junction range.
The device uses a single-diode configuration in SMA (DO-214AC) package, rated for peak surge current of 125 mApk (8.3 ms pulse), and complies with MSL level 1 moisture sensitivity per J-STD-020 - enabling standard reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, ±5 % tolerance - ensures tight voltage reference accuracy for feedback and clamping circuits |
| Test Current (IZT) | 7 mA - defines operating point where VZ and dynamic impedance are guaranteed |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports robust thermal performance on standard PCB copper areas |
| Dynamic Impedance (ZZ) | 27.4 Ω at IZT - enables low output impedance for stable regulation under load variation |
| Surge Current (IRM) | 125 mApk (8.3 ms pulse) - provides transient overvoltage resilience without degradation |
| Junction Temperature | 150 °C max - allows operation in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - industry-standard SMD footprint compatible with automated assembly |
Pinout & Package
SMA (DO-214AC) package: 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 in shunt regulator | Connected to lower-potential rail; forms return path during reverse-bias regulation |
| Cathode | Zener voltage reference terminal / input node in shunt regulator | Connected to regulated voltage node; maintains 36 V relative to anode under breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±5 % zener voltage tolerance | Reduces need for post-production trimming in precision voltage reference designs |
| Low dynamic impedance (27.4 Ω) | Minimizes output voltage deviation under varying load currents in feedback networks |
| MSL level 1 rating | Enables direct placement into standard lead-free reflow profiles without preconditioning |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical industrial and transportation systems |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Monitoring 36 V battery-derived supply rails in engine control modules under cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Shunt voltage clamp protecting ADC reference inputs and microcontroller I/O pins from overvoltage events. Use Value: Withstands 125 mApk surge current and maintains 36 V regulation within ±5 %, preventing false triggering or latch-up during ISO 7637-2 pulses. |
Use Scenario: Protecting 4–20 mA loop-powered analog input stages in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage limiter in op-amp-based signal conditioning front-ends. Use Value: Low 27.4 Ω dynamic impedance ensures <100 mV deviation across 0–5 mA load variation, preserving measurement linearity. |
| Telecom Base Station DC-DC Feedback Network | Medical Infusion Pump Power Supervision |
Use Scenario: Providing stable 36 V reference for isolated flyback converter feedback optocouplers in 48 V telecom power systems. IC Role / Device Role / Timing Role: Zener reference element in secondary-side error amplifier circuitry. Use Value: ±5 % tolerance and 150 °C max junction temperature support long-term stability in high-density, convection-cooled enclosures. |
Use Scenario: Supervising auxiliary 36 V DC supply in battery-backed medical infusion pumps requiring fail-safe voltage validation. IC Role / Device Role / Timing Role: Overvoltage detection element feeding into microcontroller reset logic via comparator input. Use Value: AEC-Q101 qualification and UL 94 V-0 package meet IEC 60601-1 insulation and flammability requirements for Class II devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36LT1G | 36 V ±5 %, 300 mW Ptot, SOT-23 package, 60 Ω ZZ at 5 mA | Lower power rating and higher dynamic impedance limit use to low-current bias/reference roles | Select when board space is constrained and surge resilience is secondary to footprint size |
| 1N4738A-T | 36 V ±5 %, 1000 mW Ptot, DO-41 through-hole package, 50 Ω ZZ at 7.6 mA | Through-hole mounting requires manual assembly or wave soldering; not suitable for fully SMT lines | Select only for legacy repair, prototyping, or mixed-technology boards where reflow compatibility is not required |
Compared with BZX84-C36LT1G and 1N4738A-T, the SML4753AHE3_A/I delivers identical voltage accuracy with superior surge handling (125 mApk vs. ≤70 mApk), lower dynamic impedance, and full SMT process compatibility - making it optimal for high-reliability automotive and industrial power monitoring.
Availability
SML4753AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial PLC analog input protection, and telecom DC-DC feedback networks requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SML4753AHE3_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 ruggedized packaging.
The SML4753AHE3_A/I belongs to Vishay's SML47xxA family of AEC-Q101-qualified Zener diodes designed specifically for automotive and industrial voltage regulation and transient suppression where stable 36 V reference performance under thermal and electrical stress is critical.
FAQ
What is the zener voltage tolerance for SML4753AHE3_A/I?
The SML4753AHE3_A/I has a zener voltage tolerance of ±5 %, indicated by the "A" suffix in the part number. This means its nominal 36 V zener voltage is guaranteed between 34.2 V and 37.8 V at 7 mA test current and 25 °C ambient. The tighter tolerance reduces calibration overhead in precision reference circuits compared to standard ±10 % variants like SML4753HE3_A/I.
Is SML4753AHE3_A/I qualified for automotive applications?
Yes, the SML4753AHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3_A/I" ordering code - where "_X" (here "A") denotes AEC-Q101 revision grade. It undergoes stress testing including HTGB, HTRB, and temperature cycling per AEC-Q101 standards, making it suitable for under-hood and body-control module applications requiring automotive-grade reliability.
What is the maximum surge current rating for SML4753AHE3_A/I?
The SML4753AHE3_A/I supports a non-repetitive surge current of 125 mApk for an 8.3 ms pulse width, per JEDEC method. This rating applies at Tamb = 25 °C and enables reliable clamping during load-dump or inductive switching transients without parametric shift or failure - a key requirement in ISO 7637-2-compliant automotive designs.
What package type does SML4753AHE3_A/I use?
The SML4753AHE3_A/I uses the SMA (DO-214AC) surface-mount package: 4.93 mm × 3.99 mm × 2.29 mm outline with cathode band marking, UL 94 V-0 flammability rating, and MSL level 1 moisture sensitivity. Its standardized footprint supports automated pick-and-place and lead-free reflow without preconditioning.
How does the dynamic impedance of SML4753AHE3_A/I affect regulation performance?
The SML4753AHE3_A/I exhibits 27.4 Ω dynamic impedance at 7 mA test current, meaning a 1 mA change in zener current causes approximately 27.4 mV change in output voltage. This low value ensures minimal voltage deviation under varying load conditions - critical for maintaining accuracy in feedback networks and reference buffers where regulation stability directly impacts system precision.
SML4753AHE3_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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 27.4 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SML4753AHE3_A/I FAQ
1.How can I place an order for SML4753AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4753AHE3_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 SML4753AHE3_A/I reliable?
The price and inventory of SML4753AHE3_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 SML4753AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4753AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4753AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4753AHE3_A/I?
SML4753AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4753AHE3_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 SML4753AHE3_A/I?
For technical support, including SML4753AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4753AHE3_A/I requirements.
6.How does Aetrix verify that SML4753AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4753AHE3_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 SML4753AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4753AHE3_A/I?
All SML4753AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4753AHE3_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 SML4753AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4753AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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