My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ30CA-E3/61
- Part No.:
- SMAJ30CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CA-E3/61.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ30CA-E3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage at 8.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ30CA-E3/61 datasheet, SMAJ30CA-E3/61 pinout, SMAJ30CA-E3/61 application, or SMAJ30CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.61), AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 30 V), while the low incremental surge resistance supports rapid energy dissipation during ESD or lightning-induced surges.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) immunity standards when applied per recommended layout. Thermal resistance (RθJA = 120 °C/W) and junction temperature range (–55 °C to +150 °C) allow reliable operation in under-hood automotive environments and industrial enclosures without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 33.3 V min / 36.8 V max at 1 mA - Ensures consistent turn-on across production lots and temperature range. |
| VC (Clamping Voltage) | 48.4 V at IPPM = 8.3 A - Limits transient voltage seen by downstream circuitry during 10/1000 μs surge events. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Supports robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges up to 1 kV. |
| ID (Reverse Leakage) | ≤1.0 μA at 30 V - Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks. |
| TJ Max | +150 °C - Enables use in engine control units, motor drives, and other high-ambient-temperature applications. |
| Package | SMA (DO-214AC) - Standardized SMT footprint compatible with JEDEC MS-013AC; MSL Level 1, lead-free (RoHS-compliant). |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit (bidirectional) | Completes surge path to ground or return rail; requires low-inductance connection to chassis or power plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and floating power rails without polarity constraints. |
| 400 W peak pulse power | Withstands repetitive 10/1000 μs transients up to 0.01% duty cycle - sufficient for automotive load-dump and inductive switching events. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices, improving system-level surge margin. |
| AEC-Q101 qualification option | HE3 suffix variants meet automotive reliability requirements including HTOL, TCT, and ESD testing - validated for under-hood deployment. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates bake requirements and simplifies SMT line integration. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle ECUs from ISO 7637-2 load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between differential pair and transceiver IC input pins. Use Value: Limits transient voltage to ≤48.4 V, preserving CAN transceiver integrity during 100 V/50 ms load dump events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor at sensor module PCB edge, shunting surge energy to ground. Use Value: Prevents latch-up or damage to precision op-amps and ADC front-ends during 4 kV ESD contact discharge. |
| Power Supply Rail Clamp | USB Port ESD Protection |
|
Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed directly across input capacitor, clamping transients before DC/DC converter stage. Use Value: Maintains VWM = 30 V margin above nominal 24 V rail, ensuring no conduction during normal operation while clamping >33 V spikes. |
Use Scenario: Adding secondary-level ESD protection to USB 2.0 data lines (D+/D−) in embedded host controllers. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS integrated into USB connector footprint, minimizing signal distortion. Use Value: Delivers <0.5 pF typical junction capacitance (per diode) and sub-1 ns response, preserving USB 480 Mbps eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/61 | Unidirectional; cathode band marking; VF = 3.5 V at 25 A forward conduction. | Requires correct polarity placement; unsuitable for AC or differential lines without external biasing. | Select only when protecting unidirectional DC rails where polarity is fixed and forward conduction may occur. |
| SMBJ30CA-E3/52 | Same VWM/VC specs but in SMB (DO-214AA) package; 600 W PPPM rating; RθJA = 90 °C/W. | Higher power handling and better thermal performance, but larger footprint (4.57 mm × 3.94 mm). | Choose when system-level surge tests exceed 400 W or ambient temperatures exceed 105 °C with limited airflow. |
Compared with SMAJ30CA-E3/61, the unidirectional SMAJ30A-E3/61 demands strict polarity alignment and lacks AC-line suitability, while the SMBJ30CA-E3/52 trades board space for enhanced thermal margin and surge headroom - making SMAJ30CA-E3/61 optimal for space-constrained bidirectional protection at 400 W duty.
Availability
SMAJ30CA-E3/61 is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial sensor interface hardening, and 24 V DC power rail clamping requiring stable component supply across long-lifecycle programs.
Supply support for SMAJ30CA-E3/61 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMAJ series delivers standardized, AEC-Q101-capable TVS diodes for board-level transient suppression in harsh environments - engineered for repeatable clamping performance and seamless SMT integration.
FAQ
What is the clamping voltage of SMAJ30CA-E3/61 at its rated peak pulse current?
The SMAJ30CA-E3/61 has a maximum clamping voltage (VC) of 48.4 V at 8.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and reflects worst-case voltage seen by protected circuitry during surge events - critical for verifying margin against IC absolute maximum ratings.
Is SMAJ30CA-E3/61 RoHS-compliant and lead-free?
Yes, SMAJ30CA-E3/61 carries the "E3" suffix, indicating full RoHS compliance and lead-free matte tin plating per J-STD-002. It meets JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability for the molding compound - verified in Vishay's 88390 datasheet revision 09-Jan-2024.
Does SMAJ30CA-E3/61 have AEC-Q101 qualification?
The base SMAJ30CA-E3/61 is commercial-grade; however, the AEC-Q101 qualified variant is designated SMAJ30CAHE3_X (e.g., SMAJ30CAHE3_A). That version undergoes extended reliability testing including HTOL, TCT, and ESD per AEC-Q101 Rev D - essential for automotive under-hood applications.
What is the thermal resistance of SMAJ30CA-E3/61, and how does it affect layout?
SMAJ30CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard 0.2" × 0.2" copper pads. To maintain TJ ≤ 150 °C at full 400 W pulse, PCB layout must minimize trace inductance and maximize copper area connected to both terminals - especially critical in repetitive surge scenarios.
How does SMAJ30CA-E3/61 differ from SMAJ30A-E3/61 in circuit implementation?
SMAJ30CA-E3/61 is bidirectional with no polarity marking, allowing placement across AC signals or differential pairs without orientation concern. In contrast, SMAJ30A-E3/61 is unidirectional with a cathode band; incorrect orientation causes open-circuit failure during reverse surges - making SMAJ30CA-E3/61 mandatory for CAN, RS-485, or Ethernet PHY protection.
SMAJ30CA-E3/61 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMAJ30CA-E3/61 FAQ
1.How can I place an order for SMAJ30CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CA-E3/61 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 SMAJ30CA-E3/61 reliable?
The price and inventory of SMAJ30CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ30CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CA-E3/61?
SMAJ30CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CA-E3/61 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 SMAJ30CA-E3/61?
For technical support, including SMAJ30CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ30CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CA-E3/61 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 SMAJ30CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ30CA-E3/61?
All SMAJ30CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CA-E3/61, 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 SMAJ30CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ30CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CA-E3/61 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 …
