My Inquiry
My Account
Microchip Technology SMAJ4735AE3/TR13
- Part No.:
- SMAJ4735AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4735AE3/TR13.pdf
- Description:
- DIODE ZENER 6.2V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,746
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ4735AE3/TR13 from SM Semiconductor is a 6.2 V, 5% tolerance Zener diode in SMA (DO-214AC) package, rated for 2.0 W steady-state power dissipation, 292 mA maximum regulator current at 100°C, and 730 mA peak surge current. It serves as a precision voltage reference and transient overvoltage protector in low-profile DC power rails and signal line conditioning circuits.
For engineers reviewing the SMAJ4735AE3/TR13 datasheet, SMAJ4735AE3/TR13 pinout, SMAJ4735AE3/TR13 application, or SMAJ4735AE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (25°C/W), reverse leakage (≤10 µA @ 3.0 V), surge capability (730 mA), and ROHS-compliant matte-tin plating for reliable solderability.
Technical Context
This device operates as a silicon planar Zener diode with sharp breakdown knee (verified via dual-point Zz measurement per MIL-STD-750 Method 2026), designed for stable voltage regulation across 1.0–292 mA operating current and -65°C to +150°C ambient range. Its 6.2 V nominal breakdown voltage is specified at 41 mA test current (IZT) with dynamic impedance ≤2.0 Ω.
The SMAJ4735AE3/TR13 exhibits 10 µA maximum reverse leakage at VR = 3.0 V and maintains regulation under transient surges up to 730 mA (1/2 sine wave, 1/120 sec), enabled by void-free thermosetting epoxy encapsulation meeting UL94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V ±5% at 41 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PM(AV)) | 2.0 W - supports continuous regulation in compact PCB layouts without forced cooling |
| Max Regulator Current (IZM) | 292 mA at TJ = 100°C - sets upper DC current limit before thermal derating |
| Peak Surge Current (Izsm) | 730 mA - withstands short-duration transients from inductive switching or ESD events |
| Reverse Leakage (IR) | ≤10 µA @ VR = 3.0 V - ensures minimal standby power loss in always-on circuits |
| Thermal Resistance (RθJL) | 25 °C/W - enables direct lead-to-PCB heat transfer for thermal stability |
| Dynamic Impedance (ZZT) | ≤2.0 Ω @ IZT = 41 mA - maintains tight voltage regulation under load variation |
Pinout & Package
Package: SMA (DO-214AC), surface-mountable, cathode indicated by band, ROHS-compliant matte-tin plated leads, 0.3 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during normal operation; forms low-impedance path when forward-biased |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; clamps voltage to 6.2 V when reverse voltage exceeds breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Ensures predictable clamping within ±0.31 V of 6.2 V, critical for tight-margin power rail protection |
| UL94V-0 epoxy encapsulation | Provides flame-retardant mechanical integrity and moisture resistance in industrial environments |
| ROHS-compliant matte-tin plating | Guarantees solderability per MIL-STD-750 Method 2026 and eliminates lead-based process constraints |
| Sharp breakdown knee (ZzK ≤ 400 Ω) | Minimizes transition region instability, enabling clean voltage limiting without oscillation |
| Low thermal resistance (25 °C/W) | Allows direct PCB copper pour heat sinking to sustain 2.0 W dissipation without heatsink |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Power Rail |
|---|---|
Use Scenario: Protecting analog front-end inputs of temperature/pressure sensors from ESD and load-dump transients in factory automation systems. IC Role / Device Role / Timing Role: Zener clamp placed between sensor output and ADC input to limit voltage excursions to ≤6.2 V. Use Value: Prevents ADC saturation and latch-up while maintaining signal fidelity due to low ZZT (≤2.0 Ω) and fast response. | Use Scenario: Regulating 5 V supply rail feeding microcontrollers and CAN transceivers in vehicle door modules. IC Role / Device Role / Timing Role: Shunt regulator stabilizing rail against battery voltage spikes up to 24 V during alternator load dump. Use Value: Sustains 730 mA surge current without failure, meeting ISO 7637-2 Pulse 5a requirements for automotive electronics. |
| Consumer USB Port Overvoltage Protection | Telecom DSL Line Interface Clamp |
Use Scenario: Safeguarding USB data lines and VBUS against hot-plug induced transients in portable docking stations. IC Role / Device Role / Timing Role: Bidirectional TVS configuration (anode-cathode tied to VBUS and GND) limiting voltage to 6.2 V. Use Value: Low 10 µA IR at 3.0 V prevents parasitic loading on 5 V rail while enabling fast clamping response. | Use Scenario: Shielding ADSL line drivers from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary shunt clamp on line-side transformer secondary winding. Use Value: 2.0 W PM(AV) and UL94V-0 case support sustained surge energy absorption without charring or delamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | Same 6.2 V nominal voltage but DO-41 package (axial lead); RθJL = 50 °C/W vs. 25 °C/W | Requires through-hole mounting and larger board area; less suitable for high-density SMT designs | Select when legacy through-hole assembly or higher thermal mass is preferred |
| BZX55C6V2 | 6.2 V ±5%, but 500 mW power rating and DO-35 package; Izsm = 200 mA max | Limited to low-energy transients; insufficient for automotive load-dump or industrial motor-switching events | Select only for battery-powered, low-power signal-level clamping where space permits axial leads |
Compared with SMAJ4735AE3/TR13, the 1N4735A offers identical electrical regulation but inferior thermal performance and board-space efficiency, while the BZX55C6V2 sacrifices surge robustness and power handling for smaller size-making SMAJ4735AE3/TR13 optimal for SMT-based, high-reliability transient suppression.
Availability
SMAJ4735AE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, consumer USB protection, and telecom line interface circuits requiring stable component supply and consistent Zener voltage tolerance.
Supply support for SMAJ4735AE3/TR13 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
SM Semiconductor is a Taiwan-based manufacturer specializing in discrete semiconductor devices including Zener diodes, TVS diodes, rectifiers, and bridge rectifiers for industrial and automotive markets.
The SMAJ47xxA series was developed specifically for surface-mount transient voltage suppression and precision DC voltage regulation in space-constrained, high-reliability applications demanding UL94V-0 compliance and ROHS-solderability.
FAQ
What is the Zener voltage tolerance of SMAJ4735AE3/TR13?
The SMAJ4735AE3/TR13 has a nominal Zener voltage of 6.2 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 5.89 V and 6.51 V when measured at 41 mA test current (IZT). This tolerance is confirmed in Table 1 of the official SM Semiconductor datasheet (Document Number: SMAJ4728A thru SMAJ4751A) and applies strictly to the "A" suffix variant. The SMAJ4735AE3/TR13 meets this specification under standard 25°C conditions.
Does SMAJ4735AE3/TR13 support ROHS-compliant assembly processes?
Yes, SMAJ4735AE3/TR13 features ROHS-compliant annealed matte-tin plating on its leads, verified per MIL-STD-750 Method 2026 for solderability. The device is fully compatible with lead-free reflow profiles and meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount assembly. Its void-free thermosetting epoxy case also complies with UL94V-0, supporting environmentally regulated manufacturing for SMAJ4735AE3/TR13.
What is the maximum surge current rating for SMAJ4735AE3/TR13?
The SMAJ4735AE3/TR13 is rated for a peak surge current (Izsm) of 730 mA, defined using a 1/2 sine wave pulse with 1/120 second duration at 25°C ambient. This value is measured per the methodology in the official SM Semiconductor datasheet and reflects the device's ability to absorb transient energy from inductive switching or ESD events without degradation. Sustained operation above this limit requires derating based on thermal conditions and pulse repetition rate for SMAJ4735AE3/TR13.
How does the thermal resistance of SMAJ4735AE3/TR13 affect its power handling?
The SMAJ4735AE3/TR13 has a junction-to-lead thermal resistance (RθJL) of 25°C/W, meaning each watt of dissipated power raises the junction temperature by 25°C above lead temperature. At 100°C junction temperature, its maximum DC regulator current (IZM) is 292 mA. This low RθJL enables effective heat transfer to PCB copper pours, allowing full 2.0 W steady-state dissipation without external heatsinks-critical for compact designs using SMAJ4735AE3/TR13.
Can SMAJ4735AE3/TR13 be used as a replacement for SMAJ4735A without layout changes?
Yes, SMAJ4735AE3/TR13 is a direct drop-in replacement for SMAJ4735A: both share identical SMA (DO-214AC) package dimensions, pinout (cathode-banded), electrical specifications (6.2 V ±5%, 2.0 W, 730 mA Izsm), and ROHS-compliant plating. The "E3/TR13" suffix denotes tape-and-reel packaging per EIA-481 standards and does not alter electrical or mechanical behavior-no PCB redesign or footprint modification is required when substituting SMAJ4735AE3/TR13.
SMAJ4735AE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC
SMAJ4735AE3/TR13 FAQ
1.How can I place an order for SMAJ4735AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4735AE3/TR13 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 SMAJ4735AE3/TR13 reliable?
The price and inventory of SMAJ4735AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4735AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4735AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4735AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4735AE3/TR13?
SMAJ4735AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4735AE3/TR13 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 SMAJ4735AE3/TR13?
For technical support, including SMAJ4735AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4735AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4735AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4735AE3/TR13 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 SMAJ4735AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4735AE3/TR13?
All SMAJ4735AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4735AE3/TR13, 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 SMAJ4735AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4735AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4735AE3/TR13 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
