My Inquiry
My Account
Microchip Technology SMAJ4754AE3/TR13
- Part No.:
- SMAJ4754AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4754AE3/TR13.pdf
- Description:
- DIODE ZENER 39V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ4754AE3/TR13 from Microsemi (now Microchip Technology) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 39 V ±5%, 60 Ω dynamic impedance at 6.5 mA test current, and 115 mA peak surge current rating. It serves as a precision voltage regulator or overvoltage clamp in DC power rails and protection circuits for industrial control modules.
For engineers reviewing the SMAJ4754AE3/TR13 datasheet, SMAJ4754AE3/TR13 pinout, SMAJ4754AE3/TR13 application, or SMAJ4754AE3/TR13 equivalent, key selection criteria include its DO-214AC package compatibility, 2.0 W steady-state power dissipation at 100°C lead temperature, and verified 29.7 V minimum zener voltage under regulation conditions.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across load variations. Its 39 V nominal zener voltage is specified at 6.5 mA test current (IZT) with 60 Ω dynamic impedance (ZZT), ensuring predictable regulation behavior under typical bias conditions.
The device supports high-reliability transient suppression with 115 mA peak surge current (IS) capability per 1/120 s half-sine pulse and exhibits low knee impedance (ZZK = 1000 Ω at IZK = 0.25 mA), enabling effective clamping near breakdown threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% at IZT = 6.5 mA - defines regulated output voltage under nominal bias |
| Dynamic Impedance (ZZT) | 60 Ω at IZT = 6.5 mA - determines voltage deviation under load current changes |
| Peak Surge Current (IS) | 115 mA - maximum single-pulse current it can absorb without failure |
| Steady-State Power (PAV) | 2.0 W at TL = 100°C - thermal limit for continuous operation on 4 mm² copper pads |
| Reverse Current (IR) | 5 µA max at VR = 29.7 V - leakage level below regulation threshold |
| Operating Temperature | -55°C to +150°C - usable range for automotive and industrial ambient environments |
Pinout & Package
Package: DO-214AC (SMAJ), surface-mount, cathode indicated by band. Dimensions conform to JEDEC standard with A = 1.98–2.92 mm length, G = 4.93–5.48 mm width, and H = 3.99–4.50 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side of circuit; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal / regulated voltage node | Connected to higher-potential side; maintains ~39 V relative to anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount flat handling surface | Enables accurate automated placement on PCBs without tombstoning |
| JEDEC DO-214AC mechanical compatibility | Ensures drop-in replacement for legacy 1N47xxA through-hole equivalents in SMT layouts |
| 2.0 W power dissipation rating | Supports sustained clamping in 12–48 V DC systems without external heatsinking |
| 115 mA peak surge current | Withstands IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) in industrial power inputs |
Applications
| Industrial PLC I/O Protection | DC-DC Converter Feedback Reference |
|---|---|
Use Scenario: Protecting 24 V digital input channels against ESD and inductive switching transients in programmable logic controllers. IC Role / Device Role / Timing Role: Zener clamping element placed between input line and ground to limit voltage excursions to ≤39 V. Use Value: Prevents damage to downstream optocouplers and microcontroller GPIO pins during 4 kV contact ESD events. | Use Scenario: Providing stable voltage reference for error amplifier feedback in isolated 48 V to 5 V flyback converters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing 39 V reference point for TL431 or similar comparator-based feedback networks. Use Value: Maintains ±5% output regulation accuracy across line/load variations due to tight VZ tolerance and low ZZT. |
| Automotive Body Control Module Clamp | Telecom Power Supply Overvoltage Guard |
Use Scenario: Clamping LIN bus transceiver supply rail against load-dump-induced spikes in vehicle body electronics. IC Role / Device Role / Timing Role: Transient voltage suppressor connected between 12 V rail and chassis ground. Use Value: Absorbs 115 mA surge pulses without degradation, meeting ISO 7637-2 Pulse 5a requirements. | Use Scenario: Safeguarding -48 V telecom rectifier outputs against overvoltage faults in central office equipment. IC Role / Device Role / Timing Role: Secondary-side shunt regulator that activates only during overvoltage fault conditions. Use Value: Limits fault voltage to 39 V, preventing catastrophic failure of downstream DC-DC stages and FET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A | Through-hole DO-41 package; identical electrical specs (39 V, 2 W, ±5%) | Requires PCB redesign for through-hole mounting; unsuitable for high-density SMT assemblies | Select when legacy through-hole assembly or manual prototyping is required |
| BZX84-C39 | SOT-23 package; 39 V ±5%, but rated at only 300 mW and 100 mA surge | Limited to low-power signal-level clamping; cannot replace SMAJ4754AE3/TR13 in power rail protection | Choose only for space-constrained signal conditioning where power dissipation < 0.3 W |
Compared with 1N4754A and BZX84-C39, SMAJ4754AE3/TR13 delivers 2 W power handling and DO-214AC SMT compatibility-critical for industrial power rail clamping where thermal robustness and automated assembly are mandatory.
Availability
SMAJ4754AE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, DC-DC converter feedback references, and automotive body control module clamping requiring stable component supply and long-term production continuity.
Supply support for SMAJ4754AE3/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
Microsemi (acquired by Microchip Technology in 2018) is a semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ47xxA series was designed specifically for surface-mount voltage regulation and transient suppression in harsh-environment power systems, emphasizing thermal stability and surge resilience over consumer-grade alternatives.
FAQ
What is the zener voltage tolerance for SMAJ4754AE3/TR13?
SMAJ4754AE3/TR13 has a nominal zener voltage of 39 V with a tolerance of ±5%, as confirmed by the "E3" suffix in the part number per Microsemi's naming convention. This tolerance applies under standard test conditions (IZT = 6.5 mA, TA = 25°C). The device does not carry tighter tolerance suffixes like "C" (±2%) or "D" (±1%).
Does SMAJ4754AE3/TR13 meet JEDEC DO-214AC mechanical standards?
Yes, SMAJ4754AE3/TR13 conforms to JEDEC DO-214AC (SMAJ) package dimensions, including length (A = 1.98–2.92 mm), width (G = 4.93–5.48 mm), and height (H = 3.99–4.50 mm). Note that its maximum length exceeds the standard JEDEC callout by 0.010 inches, as explicitly stated in the mechanical notes.
What is the maximum steady-state power dissipation for SMAJ4754AE3/TR13?
SMAJ4754AE3/TR13 is rated for 2.0 W steady-state power dissipation when mounted on 4.0 mm² copper pads per terminal and operated at lead temperature ≤100°C. Power must be derated linearly above 100°C, reaching zero at 150°C junction temperature, per the manufacturer's thermal specification.
Can SMAJ4754AE3/TR13 replace 1N4754A in existing designs?
SMAJ4754AE3/TR13 provides identical electrical performance (39 V ±5%, 2 W, 115 mA surge) as 1N4754A but in a DO-214AC surface-mount package versus DO-41 through-hole. Direct replacement requires PCB layout modification; it is not a pin-compatible drop-in substitute, though functional equivalence is confirmed per datasheet cross-reference.
What is the reverse leakage current specification for SMAJ4754AE3/TR13?
SMAJ4754AE3/TR13 specifies a maximum reverse leakage current (IR) of 5 µA at test voltage VR = 29.7 V, which is 75% of its nominal zener voltage. This value is measured at 25°C ambient and reflects the device's ability to remain effectively non-conductive below its regulation threshold.
SMAJ4754AE3/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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 29.7 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
SMAJ4754AE3/TR13 FAQ
1.How can I place an order for SMAJ4754AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4754AE3/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 SMAJ4754AE3/TR13 reliable?
The price and inventory of SMAJ4754AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4754AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4754AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4754AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4754AE3/TR13?
SMAJ4754AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4754AE3/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 SMAJ4754AE3/TR13?
For technical support, including SMAJ4754AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4754AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4754AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4754AE3/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 SMAJ4754AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4754AE3/TR13?
All SMAJ4754AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4754AE3/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 SMAJ4754AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4754AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4754AE3/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…
