My Inquiry
My Account
Microchip Technology SMAJ4735CE3/TR13
- Part No.:
- SMAJ4735CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4735CE3/TR13.pdf
- Description:
- DIODE ZENER 6.2V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,634
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ4735CE3/TR13 from Semtech is a 6.2 V, 2.0 W silicon Zener diode in SMA (DO-214AC) package, rated for 41 mA test current, 292 mA maximum regulator current at 100°C, and 730 mA peak surge current; used for transient voltage suppression and overvoltage regulation in power supply rails and I/O protection circuits.
For engineers reviewing the SMAJ4735CE3/TR13 datasheet, SMAJ4735CE3/TR13 pinout, SMAJ4735CE3/TR13 application, or SMAJ4735CE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±2%), dynamic impedance (2.0 Ω), reverse leakage (10 µA @ 3.0 V), thermal resistance (25 °C/W), and DO-214AC mechanical compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to clamp transient voltages above its 6.2 V nominal zener voltage, with sharp knee characteristics verified by 1 mA knee current and ≤2.0 Ω dynamic impedance at 41 mA test current. It maintains regulation across -65°C to +150°C ambient temperature range.
Designed for unidirectional transient voltage suppression, SMAJ4735CE3/TR13 features a cathode band polarity indicator, void-free thermosetting epoxy case (UL94V-0), and matte-tin-plated axial leads compatible with reflow and wave soldering per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.2 V ±2% at 41 mA - precise clamping threshold for 5 V rail protection |
| Power Dissipation | 2.0 W steady-state - supports continuous regulation without heatsink below 80°C ambient |
| Dynamic Impedance ZZT | 2.0 Ω at IZT = 41 mA - low voltage deviation under varying load current |
| Reverse Leakage IR | 10 µA max @ VR = 3.0 V - minimal standby power loss in always-on circuits |
| Peak Surge Current IZSM | 730 mA (1/2 sine wave, 1/120 s) - withstands IEC 61000-4-5 Level 3 transients |
| Thermal Resistance RθJL | 25 °C/W junction-to-lead - enables direct lead heat sinking for higher pulse duty cycles |
| Operating Temperature | -65°C to +150°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode indicated by band, 0.3 g weight, UL94V-0 epoxy body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to lower-potential side (e.g., GND or return path) during clamping |
| Cathode | Clamping output node | Connected to protected line (e.g., 5 V rail); conducts when voltage exceeds 6.2 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% zener voltage tolerance (C suffix) | Enables tighter clamping margin vs. standard 5% parts, reducing overvoltage risk in 5 V systems |
| Low dynamic impedance (2.0 Ω) | Minimizes voltage overshoot during fast transients (<100 ns rise time) |
| DO-214AC package footprint | Supports automated placement and reflow; occupies 3.5 mm × 1.9 mm PCB area |
| UL94V-0 epoxy encapsulation | Meets flammability requirements for industrial and automotive end equipment |
| ROHS-compliant matte-tin plating | Ensures reliable solder wetting and intermetallic formation in Pb-free assembly |
Applications
| Microcontroller Power Rail Protection | Automotive Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 5 V supply pins of ARM Cortex-M microcontrollers against load dump and ESD events in industrial PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VCC and GND, conducting only during overvoltage excursions. Use Value: Limits rail voltage to ≤6.8 V (VZ + ΔVZ) during 1 A/10 µs transients, preventing MCU brownout or latch-up. |
Use Scenario: Safeguarding analog outputs of pressure sensors in engine control units exposed to ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Zener-based shunt clamp on sensor's 0–5 V output line, referenced to chassis ground. Use Value: Maintains signal integrity below 10 mV error during 100 V/50 ms surges due to low ZZT and stable VZ. |
| USB Port VBUS Overvoltage Clamp | Industrial CAN Transceiver Power Input Protection |
Use Scenario: Secondary overvoltage protection on USB 2.0 VBUS line after primary fuse, guarding against adapter fault conditions. IC Role / Device Role / Timing Role: Standby Zener regulator that activates only when VBUS exceeds 6.2 V, diverting excess current to GND. Use Value: Prevents damage to USB controller ICs rated for max 6.5 V absolute input, leveraging 2.0 W dissipation capability. |
Use Scenario: Input-side transient suppression for isolated CAN transceivers powered from 12 V vehicle battery via DC-DC converter. IC Role / Device Role / Timing Role: Bidirectional-capable clamping (when paired with complementary diode) on 12 V input rail feeding transceiver LDO. Use Value: Absorbs 730 mA surge pulses without degradation, preserving CAN bus uptime during ignition switching noise. |
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 VZ, but 5% tolerance (±310 mV), 1.0 W rating, DO-41 package | Larger footprint, lower surge rating (500 mA), unsuitable for high-density SMT designs | Select SMAJ4735CE3/TR13 for space-constrained, high-reliability SMT layouts requiring ±2% precision |
| BZX84-C6V2 | 6.2 V ±5%, 300 mW, SOT-23 package, 100 mA IZM, 100 mA IZSM | Lower power handling, not rated for automotive transients; limited to low-energy signal lines | Choose SMAJ4735CE3/TR13 where 2.0 W dissipation and 730 mA surge capability are mandatory |
Compared with 1N4735A and BZX84-C6V2, SMAJ4735CE3/TR13 delivers superior thermal performance (25 °C/W vs. >100 °C/W), tighter voltage tolerance, and DO-214AC mechanical robustness-making it the preferred choice for industrial and automotive transient suppression where reliability and density are critical.
Availability
SMAJ4735CE3/TR13 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ4735CE3/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
Semtech Corporation is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power management, protection, and signal integrity.
SMAJ47xx series Zener diodes are engineered for high-reliability transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications demanding robust overvoltage resilience.
FAQ
What is the zener voltage tolerance of SMAJ4735CE3/TR13?
The 'C' suffix in SMAJ4735CE3/TR13 denotes a ±2% zener voltage tolerance at 41 mA test current, resulting in a guaranteed breakdown range of 6.076 V to 6.324 V. This tighter tolerance improves clamping accuracy compared to standard 5% parts like SMAJ4735A, making SMAJ4735CE3/TR13 suitable for precision 5 V rail protection where margin is constrained.
Is SMAJ4735CE3/TR13 RoHS compliant?
Yes, SMAJ4735CE3/TR13 features ROHS-compliant annealed matte-tin plating on its axial leads, verified per J-STD-609 and compatible with Pb-free reflow profiles. The void-free thermosetting epoxy case meets UL94V-0 flammability standards, confirming full compliance for use in environmentally regulated industrial and automotive electronics.
What is the maximum surge current rating for SMAJ4735CE3/TR13?
SMAJ4735CE3/TR13 is rated for 730 mA peak surge current (IZSM) under standardized 1/2 sine wave conditions (1/120 s duration), per IEC 61000-4-5 testing methodology. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure, supporting Level 3 immunity in industrial equipment designs.
How does the thermal resistance of SMAJ4735CE3/TR13 affect its power handling?
With a junction-to-lead thermal resistance (RθJL) of 25 °C/W, SMAJ4735CE3/TR13 can dissipate its full 2.0 W rating when leads are adequately heat-sunk-e.g., using ≥25 mm² copper pour on both anode and cathode pads. Without thermal relief, derating to ~1.2 W is required at 100°C ambient, per the device's power derating curve.
Can SMAJ4735CE3/TR13 be used for bidirectional transient suppression?
No-SMAJ4735CE3/TR13 is a unidirectional Zener diode optimized for reverse-bias clamping only. For bidirectional protection (e.g., AC signal lines), a pair of SMAJ4735CE3/TR13 devices in series opposition or a dedicated bidirectional TVS like SMAJ6.0A is required. Its cathode band marking confirms polarity-specific mounting.
SMAJ4735CE3/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:
- ±2%
- 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
SMAJ4735CE3/TR13 FAQ
1.How can I place an order for SMAJ4735CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4735CE3/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 SMAJ4735CE3/TR13 reliable?
The price and inventory of SMAJ4735CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4735CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4735CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4735CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4735CE3/TR13?
SMAJ4735CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4735CE3/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 SMAJ4735CE3/TR13?
For technical support, including SMAJ4735CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4735CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4735CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4735CE3/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 SMAJ4735CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4735CE3/TR13?
All SMAJ4735CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4735CE3/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 SMAJ4735CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4735CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4735CE3/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…
