My Inquiry
My Account
Taiwan Semiconductor Corporation 1SMA4753H
- Part No.:
- 1SMA4753H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
1SMA4753H.pdf
- Description:
- DIODE ZENER 36V 1.25W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,290
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1SMA4753H from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 36 V ±5%, 7.0 mA test current, 50 Ω dynamic impedance at IZT, 1 W power dissipation, and DO-214AC (SMA) package. It delivers stable voltage regulation in automotive and industrial power supply protection circuits.
For engineers reviewing the 1SMA4753H datasheet, 1SMA4753H pinout, 1SMA4753H application, or 1SMA4753H equivalent, key selection criteria include zener voltage tolerance, surge current rating (125 A), leakage current at 27.4 V (≤1 µA), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The 1SMA4753H uses a glass-passivated silicon junction to achieve low inductance and stable breakdown characteristics across -55°C to +175°C operating temperature. Its single-die DO-214AC construction supports automated placement and meets JESD201 Class 2 whisker resistance.
It operates with typical reverse leakage ≤1 µA at 80% of nominal VZ (27.4 V), and exhibits non-repetitive peak surge capability of 60 W under 100 µs pulse conditions. Thermal resistance is optimized for PCB mounting with 5 mm × 5 mm copper pad per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - precise reference voltage for regulation at 7.0 mA test current |
| Power Dissipation (PD) | 1 W at 25°C ambient - defines maximum continuous thermal load on standard PCB layout |
| Zener Impedance (ZZT) | 50 Ω at IZT - ensures minimal output voltage variation under dynamic load changes |
| Leakage Current (IR) | ≤1 µA at 27.4 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current (IFSM) | 30 A (8.3 ms half-sine) - enables transient overvoltage clamping without failure |
| Junction Temperature (TJ) | -55°C to +175°C - supports operation in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronic systems per stress test requirements |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, cathode indicated by band. Weight: 0.060 g. Molding compound UL 94V-0 rated; matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node during regulation or clamping |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input rail or protected node; reverse-biased to maintain regulated voltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term VZ drift performance and humidity resistance per J-STD-020 Level 1 |
| AEC-Q101 qualification | Validates robustness for automotive power management and body electronics applications |
| Low inductance structure | Supports fast transient response in ESD and surge suppression circuits up to 100 MHz |
| Matte tin-plated leads | Ensures reliable solder joint formation and compatibility with lead-free reflow profiles |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference Supply |
|---|---|
Use Scenario: Clamping transients on 12 V/24 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp. Use Value: Withstands 30 A surge current and maintains 36 V regulation within ±5%, protecting downstream CAN/LIN transceivers. |
Use Scenario: Providing stable 36 V reference for precision analog front-ends in pressure/temperature sensors. IC Role / Device Role / Timing Role: Voltage reference element in two-terminal shunt configuration. Use Value: Low 1 µA leakage at 27.4 V minimizes error in high-impedance divider networks; ±5% tolerance ensures calibration repeatability. |
| DC-DC Converter Feedback Divider | Overvoltage Detection in SMPS |
Use Scenario: Setting output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision zener in secondary-side voltage sensing path. Use Value: 50 Ω dynamic impedance ensures tight regulation despite load-step-induced current variation in feedback loop. |
Use Scenario: Triggering shutdown logic when main DC bus exceeds safe threshold in telecom power supplies. IC Role / Device Role / Timing Role: Overvoltage sense element interfacing with comparator input. Use Value: Sharp knee at 36 V enables accurate trip point; AEC-Q101 qualification supports use in base station backup systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4753A | Same 36 V ±5% VZ, but TO-204AE (DO-41) through-hole package; higher RTHJA limits power handling at elevated ambient | Not suitable for automated SMT lines; requires wave soldering or hand assembly | Select only if legacy through-hole design or manual repair is required |
| BZX84-C36 | SOT-23 package; 36 V ±5%, but rated at 300 mW; ZZT = 90 Ω - higher impedance reduces regulation accuracy | Limited to low-power signal-level clamping; insufficient for 1 W surge energy absorption | Use only in space-constrained, low-current bias networks where 1 W dissipation is unnecessary |
Compared with 1SMA4753H, 1N4753A offers identical electrical specs but lacks SMT compatibility and AEC-Q101 validation, while BZX84-C36 trades power handling and surge robustness for miniaturization - making 1SMA4753H optimal for automotive and industrial SMT designs requiring 1 W regulation and transient immunity.
Availability
1SMA4753H is available at Aetrix Electronics and suitable for automotive power management, industrial sensor reference supplies, and DC-DC converter feedback networks requiring stable component supply with full traceability and lifecycle support.
Supply support for 1SMA4753H 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 for automotive, industrial, and consumer markets.
The 1SMA47xxH series was designed specifically for AEC-Q101-compliant surface-mount voltage regulation and transient suppression in harsh-environment electronics, emphasizing reliability, thermal stability, and automated assembly compatibility.
FAQ
What is the zener voltage tolerance for 1SMA4753H?
The 1SMA4753H has a nominal zener voltage of 36 V with a standard tolerance of ±5%, meaning the actual measured VZ falls between 34.2 V and 37.8 V when tested at 7.0 mA and 30°C lead temperature. This tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range of -55°C to +175°C. The 1SMA4753H achieves this consistency using a glass-passivated junction and AEC-Q101-qualified process control.
Is 1SMA4753H suitable for automotive applications?
Yes, the 1SMA4753H is AEC-Q101 qualified and explicitly designed for automotive use. It passes stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock per AEC-Q101 Rev D. Its DO-214AC package supports automated placement on engine control units and body modules, and its 175°C max junction temperature accommodates under-hood thermal environments. The 1SMA4753H is referenced in TSC's automotive-grade Zener portfolio documentation.
What is the maximum non-repetitive surge current rating for 1SMA4753H?
The 1SMA4753H supports a non-repetitive peak forward surge current (IFSM) of 30 A for an 8.3 ms single half-sine wave, as defined in JEDEC standards. Additionally, its non-repetitive peak surge power (PZSM) is rated at 60 W under 100 µs square-pulse conditions. These ratings enable the 1SMA4753H to absorb transient energy from load dump events and ESD spikes without degradation, provided PCB thermal design follows the 5 mm × 5 mm copper pad recommendation.
How does the leakage current of 1SMA4753H compare at rated voltage?
At 27.4 V (80% of nominal 36 V), the 1SMA4753H exhibits a maximum reverse leakage current (IR) of 1 µA at 25°C ambient. This low leakage ensures minimal power loss in high-impedance reference dividers and preserves accuracy in precision analog circuits. Leakage remains below 5 µA up to 125°C, verified per TSC's Figure 7 leakage current curves. The 1SMA4753H achieves this performance via optimized junction passivation and controlled doping profiles.
What packaging and reel quantity is available for 1SMA4753H?
The 1SMA4753H is supplied in DO-214AC (SMA) package on 7,500-unit tape-and-reel format, compliant with EIA-481-D standards. The reel includes moisture sensitivity level (MSL) 1 rating per J-STD-020, eliminating bake requirements prior to reflow. Each unit features cathode band marking and laser-etched "753A" code. Aetrix Electronics stocks standard reels and supports custom cut-tape and tube options for prototyping and low-volume production of the 1SMA4753H.
1SMA4753H 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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 27.4 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)
1SMA4753H FAQ
1.How can I place an order for 1SMA4753H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMA4753H 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 1SMA4753H reliable?
The price and inventory of 1SMA4753H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMA4753H is usually 5 days.
3.What payment methods are accepted for 1SMA4753H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMA4753H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMA4753H?
1SMA4753H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMA4753H 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 1SMA4753H?
For technical support, including 1SMA4753H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMA4753H requirements.
6.How does Aetrix verify that 1SMA4753H is sourced from the original manufacturer or authorized distributors?
All 1SMA4753H 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 1SMA4753H meets industry standards.
7.What is the process for return or replacement of 1SMA4753H?
All 1SMA4753H units undergo pre-shipment inspection (PSI). If there is an issue with 1SMA4753H, 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 1SMA4753H part is unused and in its original packaging.
Return procedure for 1SMA4753H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMA4753H 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
