My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ5.0A-E3/5A
- Part No.:
- SMAJ5.0A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0A-E3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:19,853
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ5.0A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 5.0 V stand-off voltage (VWM), 6.40–7.07 V breakdown voltage (VBR) at 10 mA, 400 W peak pulse power (10/1000 μs), clamping voltage of 9.2 V at 43.5 A, and operates across –55 °C to +150 °C junction temperature. It is used in automotive ECUs, industrial sensor interfaces, and USB power input stages.
For engineers reviewing the SMAJ5.0A-E3/5A datasheet, SMAJ5.0A-E3/5A pinout, SMAJ5.0A-E3/5A application, or SMAJ5.0A-E3/5A equivalent, key selection criteria include its 5.0 V stand-off rating, 9.2 V clamping performance under 43.5 A surge, SMA (DO-214AC) package compatibility with automated SMT assembly, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SMAJ5.0A-E3/5A implements a silicon avalanche diode structure optimized for fast transient response (<1 ps) and low clamping ratio (VC/VBR ≈ 1.33). Its glass-passivated junction ensures stable leakage (<800 μA at VWM) and robust surge handling up to 40 A IFSM (8.3 ms half-sine).
Thermally, it exhibits RθJA = 120 °C/W on standard 0.2" × 0.2" copper pads and RθJL = 30 °C/W to lead, enabling reliable operation at 3.3 W steady-state dissipation. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before significant leakage; sets minimum system rail margin for protected line. |
| VBR (min/max) | 6.40 V / 7.07 V at 10 mA - Confirmed avalanche onset range; defines turn-on threshold under ESD/lightning transients. |
| VC @ IPPM | 9.2 V at 43.5 A - Clamped voltage during 400 W 10/1000 μs surge; determines maximum stress on downstream ICs. |
| IPPM | 43.5 A - Peak surge current capability under standardized waveform; validates protection level per IEC 61000-4-5 Level 4. |
| PPPM | 400 W - Peak pulse power rating (10/1000 μs); defines energy absorption capacity without failure. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and high-ambient industrial use. |
| Package | SMA (DO-214AC) - Standardized 2-pin surface-mount outline with 0.208" body length; compatible with IPC-7351B footprint. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side (e.g., GND or return path); conducts during forward surge events. |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 5 V rail); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics. |
| Clamping voltage ≤ 9.2 V at 43.5 A | Protects 5 V logic interfaces (e.g., MCU GPIO, UART, CAN transceivers) without exceeding absolute maximum ratings. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage (<800 μA) across temperature and lifetime stress conditions. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without popcorn or delamination risk. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants meet automotive reliability standards; enables drop-in use in qualified designs. |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protecting 5 V microcontroller supply inputs against load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Primary clamping device on main 5 V rail; responds within picoseconds to suppress >100 V spikes. Use Value: Limits voltage seen by MCU to ≤9.2 V during 43.5 A surges, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding RS-485 transceiver VCC and data lines from ESD and cable-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly at connector entry point; clamps common-mode and differential transients. Use Value: Maintains 5.0 V rail integrity while absorbing 400 W pulses, ensuring uninterrupted serial communication under EMC stress. |
| USB Type-A Power Input Stage | Consumer Appliance Motor Driver Logic Supply |
Use Scenario: Overvoltage protection on 5 V VBUS line of embedded USB host ports subjected to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Unidirectional shunt clamp between VBUS and GND; activated only during reverse overvoltage events. Use Value: Prevents backfeed into USB controller ICs by clamping to 9.2 V before internal LDOs or regulators fail. |
Use Scenario: Shielding gate driver IC logic supply from inductive kickback generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: Low-capacitance TVS on 5 V bias rail feeding half-bridge drivers; handles repetitive 10/1000 μs transients. Use Value: Sustains 400 W surge rating at 0.01% duty cycle, enabling reliable operation in high-noise motor control environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0AHE3_A/I | AEC-Q101 qualified, halogen-free, RoHS-compliant; identical electrical specs and SMA package. | Required for automotive production programs needing PPAP documentation and qualification traceability. | Select when automotive-grade reliability and full qualification evidence are mandatory. |
| SMBJ5.0A-E3/52 | Same VWM/VC, but SMB (DO-214AA) package: 27% larger footprint, 10% higher PPPM (600 W), RθJA = 85 °C/W. | Better thermal performance and higher surge margin; suited for high-reliability industrial power supplies. | Choose when board space allows larger package and higher 600 W surge headroom is needed. |
Compared with SMAJ5.0A-E3/5A, the HE3_A/I variant adds automotive qualification without altering electrical behavior, while SMBJ5.0A-E3/52 trades compactness for enhanced thermal and surge capability-enabling design flexibility across commercial, industrial, and automotive tiers.
Availability
SMAJ5.0A-E3/5A is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor interface protection, and consumer USB power input stages requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for SMAJ5.0A-E3/5A 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and computing systems-designed for rapid response, repeatable clamping, and seamless SMT integration.
FAQ
What is the maximum clamping voltage of the SMAJ5.0A-E3/5A under surge conditions?
The SMAJ5.0A-E3/5A has a maximum clamping voltage (VC) of 9.2 V at 43.5 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMAJ5.0A-E3/5A maintains this clamping performance across its full operating temperature range.
Is the SMAJ5.0A-E3/5A suitable for automotive applications?
The SMAJ5.0A-E3/5A itself is commercial-grade (RoHS-compliant, J-STD-020 MSL Level 1), but Vishay offers AEC-Q101-qualified versions under the HE3 and HM3 suffixes (e.g., SMAJ5.0AHE3_A/I). These share identical electrical characteristics and SMA packaging. For production automotive use, specify the HE3/HM3 variant; the SMAJ5.0A-E3/5A remains appropriate for prototyping, non-safety-critical subsystems, or cost-driven Tier 2 designs.
What is the reverse leakage current specification for the SMAJ5.0A-E3/5A at its stand-off voltage?
At VWM = 5.0 V and TA = 25 °C, the SMAJ5.0A-E3/5A exhibits a maximum reverse leakage current (ID) of 800 μA. This value is confirmed in the Vishay datasheet (Document Number: 88390, Rev. 09-Jan-2024) and reflects worst-case leakage under nominal operating conditions. Leakage remains well below thresholds that would affect 5 V rail regulation or battery-powered standby current budgets.
How does the SMAJ5.0A-E3/5A compare to bidirectional TVS diodes like SMAJ5.0CA?
The SMAJ5.0A-E3/5A is unidirectional and includes a cathode band; it conducts only in reverse avalanche and forward-biased modes. In contrast, SMAJ5.0CA is bidirectional with symmetric clamping in both polarities and no polarity marking. The SMAJ5.0A-E3/5A is preferred for DC rail protection where polarity is fixed (e.g., 5 V to GND), offering tighter VBR tolerance and lower capacitance than its CA counterpart. Both share identical package and surge ratings.
What PCB layout guidance applies to the SMAJ5.0A-E3/5A for optimal thermal and surge performance?
Vishay specifies mounting the SMAJ5.0A-E3/5A on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W pulse power and RθJA = 120 °C/W. Minimizing trace inductance between the TVS and protected node is critical-place it within 5 mm of the connector or IC pin. Avoid thermal reliefs on pads; use solid copper pours connected to internal ground planes. The SMAJ5.0A-E3/5A must be oriented with the cathode band toward the protected line.
SMAJ5.0A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ5.0A-E3/5A FAQ
1.How can I place an order for SMAJ5.0A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0A-E3/5A 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 SMAJ5.0A-E3/5A reliable?
The price and inventory of SMAJ5.0A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0A-E3/5A?
SMAJ5.0A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0A-E3/5A 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 SMAJ5.0A-E3/5A?
For technical support, including SMAJ5.0A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0A-E3/5A requirements.
6.How does Aetrix verify that SMAJ5.0A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0A-E3/5A 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 SMAJ5.0A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0A-E3/5A?
All SMAJ5.0A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0A-E3/5A, 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 SMAJ5.0A-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0A-E3/5A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
