My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ7.0CAHE3_A/I
- Part No.:
- SMAJ7.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ7.0CAHE3_A/I 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 or power lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 33.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ7.0CAHE3_A/I datasheet, SMAJ7.0CAHE3_A/I pinout, SMAJ7.0CAHE3_A/I application, or SMAJ7.0CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.71), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding in <1 ps to transient overvoltages. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, eliminating polarity concerns during board layout.
The SMAJ7.0CAHE3_A/I delivers 400 W peak pulse power handling up to 78 V VWM (derated to 300 W above 78 V), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line operating margin. |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lots. |
| VC @ IPPM | 12.0 V at 33.3 A - Clamped voltage during 10/1000 μs surge; limits downstream component stress to ≤12 V. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy absorption capacity; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| ID @ VWM | 200 μA - Reverse leakage at rated stand-off; low enough to avoid signal integrity degradation in high-impedance sensor lines. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; connects to protected line without polarity constraint. |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; functionally identical to Anode in bidirectional mode; no band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates orientation dependency during automated assembly and simplifies PCB routing. |
| AEC-Q101 qualification | Validated for automotive electronics - meets stress test requirements for temperature cycling, high-temp reverse bias, and ESD (HBM ≥ 8 kV). |
| 400 W peak pulse power | Handles 10/1000 μs surges up to 33.3 A - protects against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 combination wave transients. |
| Low clamping ratio (VC/VWM) | 1.71 - Minimizes overvoltage exposure to downstream ICs while maintaining sufficient noise margin below logic thresholds. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH - supports standard SMT reflow without baking, reducing manufacturing overhead. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients faster than system response time. Use Value: Limits voltage excursion to ≤12.0 V during 33.3 A surges, preventing latch-up or gate oxide damage in AEC-Q100 qualified MCUs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules in factory automation. IC Role / Device Role / Timing Role: Standoff-mode protector on 4–20 mA current loop or 0–10 V output lines exposed to ESD and relay contact bounce. Use Value: Maintains ≤200 μA leakage at 7.0 V, avoiding measurement error in high-impedance sensing circuits while clamping fast transients. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer TVS, meeting IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response avalanche diode shunting ESD current to ground before it reaches USB PHY transceiver. Use Value: Sub-nanosecond response and 12.0 V clamping ensure USB data integrity remains intact during ±8 kV HBM events. |
Use Scenario: Front-end surge suppression on ADSL/VDSL line cards where asymmetric transients couple onto twisted-pair telecom lines. IC Role / Device Role / Timing Role: Bidirectional clamping element placed differential-to-ground to suppress common-mode surges exceeding ITU-T K.20/K.21 limits. Use Value: Symmetrical 7.78–8.60 V VBR ensures balanced clamping on both conductors, preserving differential signal integrity during lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CA-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive reliability validation; suitable for consumer or industrial non-automotive use only. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMBJ7.0CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating (vs. 400 W). | Higher surge capacity and lower RθJA (90 °C/W vs. 120 °C/W); requires larger PCB footprint. | Choose when higher single-event surge margin or improved thermal performance is needed despite space constraints. |
Compared with SMAJ7.0CAHE3_A/I, the SMAJ7.0CA-E3/61 offers identical protection performance without automotive qualification, while the SMBJ7.0CAHE3_A/I provides 50 % higher peak pulse power and better thermal dissipation at the cost of increased board area - enabling trade-offs between reliability, footprint, and surge margin.
Availability
SMAJ7.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC analog modules, consumer USB peripherals, and telecom line cards requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ7.0CAHE3_A/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMAJ series targets robust transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial, and telecom environments where consistent clamping behavior and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMAJ7.0CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration: SMAJ7.0CAHE3_A/I provides symmetrical clamping in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This eliminates orientation constraints during PCB layout and supports AC-coupled or differential signal protection without polarity awareness. The device has no cathode band marking, distinguishing it from unidirectional "A" variants.
Is SMAJ7.0CAHE3_A/I suitable for protecting 5 V logic interfaces?
Yes, SMAJ7.0CAHE3_A/I is appropriate for 5 V logic interface protection: its 7.0 V stand-off voltage (VWM) provides adequate margin above 5 V nominal rails, while its 12.0 V clamping voltage (VC) stays within absolute maximum ratings of most 5 V-tolerant I/O cells. With only 200 μA leakage at VWM, it avoids loading high-impedance nodes - confirmed by Vishay's electrical characterization at 25 °C.
How does the HE3 suffix affect the specification of SMAJ7.0CAHE3_A/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification: SMAJ7.0CAHE3_A/I meets automotive-grade reliability requirements including temperature cycling, high-temperature reverse bias, and ESD testing per AEC-Q101 Rev G. It also features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing - distinguishing it from commercial-grade E3/M3 variants.
What is the maximum allowable PCB pad size for optimal thermal performance of SMAJ7.0CAHE3_A/I?
Vishay specifies optimal thermal performance for SMAJ7.0CAHE3_A/I when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as stated in the "Maximum Ratings" table. Using smaller pads increases thermal resistance beyond the rated 120 °C/W RθJA, risking junction overheating during repetitive surges. Larger pads improve heat dissipation but require verification against solder joint reliability and IPC-7351B land pattern guidelines.
Does SMAJ7.0CAHE3_A/I meet UL 497B recognition requirements?
Yes, SMAJ7.0CAHE3_A/I carries Underwriters Laboratory Recognition under UL 497B (QVGQ2 file E136766) for both unidirectional and bidirectional configurations. This certification confirms suitability for use in telecommunications and signal line protection applications where UL-listed surge protection components are mandated - verified in Vishay document 88390, footnote (+) on page 2.
SMAJ7.0CAHE3_A/I 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ7.0CAHE3_A/I FAQ
1.How can I place an order for SMAJ7.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0CAHE3_A/I 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 SMAJ7.0CAHE3_A/I reliable?
The price and inventory of SMAJ7.0CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ7.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0CAHE3_A/I?
SMAJ7.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0CAHE3_A/I 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 SMAJ7.0CAHE3_A/I?
For technical support, including SMAJ7.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ7.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0CAHE3_A/I 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 SMAJ7.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ7.0CAHE3_A/I?
All SMAJ7.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0CAHE3_A/I, 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 SMAJ7.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ7.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0CAHE3_A/I 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 …
