My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ8.0CAHE3/61
- Part No.:
- SMAJ8.0CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CAHE3/61.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,398
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ8.0CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 29.4 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) capability with a 10/1000 μs waveform - deployed in automotive, industrial, and telecom systems to safeguard MOSFETs, ICs, and sensor interfaces against ESD and inductive switching transients.
For engineers reviewing the SMAJ8.0CAHE3/61 datasheet, SMAJ8.0CAHE3/61 pinout, SMAJ8.0CAHE3/61 application, or SMAJ8.0CAHE3/61 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on SMA (DO-214AC) footprint.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 μA leakage at 8.0 V), but triggers into low-impedance conduction when reverse or forward transients exceed its breakdown range (8.89–9.83 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The SMAJ8.0CAHE3/61 is rated for repetitive surge duty cycle of 0.01 %, derated above 25 °C per Fig. 2, and supports operation from –55 °C to +150 °C junction temperature. Its bidirectional architecture eliminates polarity sensitivity, enabling direct placement across differential or AC-coupled lines without orientation concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 8.89 V / 9.83 V at 1 mA - Confirmed breakdown voltage range ensuring reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 13.6 V at 29.4 A - Clamping voltage under standardized 10/1000 μs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling capacity; enables suppression of high-energy transients such as ISO 7637-2 Load Dump surges in automotive ECUs. |
| ID @ VWM | 50 μA max - Low reverse leakage at stand-off voltage preserves signal integrity and minimizes standby power loss in battery-powered sensors. |
| TJ max. | +150 °C - Extended junction temperature rating supports under-hood automotive deployment and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm outline, optimized for automated pick-and-place and IPC-compliant reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 compliant (peak reflow 260 °C), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional configuration | No marking on device body; symmetric conduction path allows either terminal to serve as input or return depending on transient polarity. |
| Cathode | Current exit terminal in forward bias; common node in bidirectional configuration | No band or polarity marking - distinguishes SMAJ8.0CAHE3/61 from unidirectional variants (e.g., SMAJ8.0A) and confirms true bidirectional functionality. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - required for engine control, ADAS, and infotainment modules. |
| 400 W peak pulse power | Withstands 10/1000 μs transients up to 29.4 A without degradation - meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces adjacent to protected lines. |
| Fast response time (<1 ns) | Activates before transient energy couples into sensitive circuitry - essential for guarding high-speed sensor outputs and CAN bus lines. |
| MSL Level 1 moisture sensitivity | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry-pack handling or floor-life constraints. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Installed across 12 V battery feed lines in body control modules to suppress load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt TVS diode providing instantaneous clamping during >100 V, 100 ms transients per ISO 7637-2 Pulse 5a. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤13.6 V, preventing latch-up or permanent damage. |
Use Scenario: Placed on analog output lines of pressure or temperature sensors in PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp protecting 0–10 V or 4–20 mA signal paths from inductive kickback and EFT bursts. Use Value: Maintains signal fidelity by limiting transient-induced offset errors and eliminating need for additional RC filtering stages. |
| Telecom Data Line Surge Suppression | Consumer Device USB Port ESD Protection |
|
Use Scenario: Deployed on RS-485 transceiver bus lines in base station remote units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary line-to-line and line-to-ground transient suppressor meeting ITU-T K.20 and IEC 61000-4-5 requirements. Use Value: Enables single-device protection for full-duplex differential pairs without compromising common-mode rejection or data rate. |
Use Scenario: Integrated on VBUS and D+/D− lines of portable media players to survive ±15 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional clamp minimizing signal distortion on high-speed USB 2.0 links. Use Value: Prevents ESD-induced reset or communication failure while maintaining USB compliance without added series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution if halogen-free content is required; same thermal and clamping performance. |
| SMBJ8.0CAHE3/61 | Same VWM (8.0 V) and VBR range, but SMB package (DO-214AA) offers higher PPPM (600 W) and lower RθJA (80 °C/W). | Better suited for higher-power surge events or thermally constrained layouts where PCB copper area is limited. | Choose when system-level surge test levels exceed 400 W or ambient temperature exceeds 105 °C. |
Compared with SMAJ8.0CAHE3/61, the SMAJ8.0CA-M3/61 provides identical protection performance with halogen-free construction, while the SMBJ8.0CAHE3/61 delivers 50 % higher surge power handling and improved thermal dissipation - making it preferable for harsher surge environments or compact thermal designs.
Availability
SMAJ8.0CAHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning circuits, and telecom infrastructure equipment requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for SMAJ8.0CAHE3/61 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and communications systems needing robust, AEC-Q101-qualified TVS solutions.
FAQ
What does the "CA" suffix indicate in SMAJ8.0CAHE3/61?
The "CA" suffix denotes a bidirectional configuration: SMAJ8.0CAHE3/61 conducts identically in both polarities, with symmetrical breakdown (8.89–9.83 V) and clamping behavior. Unlike unidirectional variants (e.g., SMAJ8.0A), it has no cathode band marking and is used where polarity of transient voltage is undefined - such as across AC signal lines or differential buses. This makes SMAJ8.0CAHE3/61 ideal for protecting balanced interfaces without orientation constraints.
Is SMAJ8.0CAHE3/61 suitable for automotive applications?
Yes, SMAJ8.0CAHE3/61 is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HE3 suffix). It meets stringent automotive reliability requirements including temperature cycling, mechanical shock, and humidity testing. Its 150 °C max junction temperature, 400 W surge rating, and DO-214AC package make SMAJ8.0CAHE3/61 appropriate for under-hood ECUs, body electronics, and ADAS sensor modules subject to ISO 7637-2 and ISO 16750-2 stress conditions.
How does the clamping voltage of SMAJ8.0CAHE3/61 compare to its stand-off voltage?
SMAJ8.0CAHE3/61 has a stand-off voltage (VWM) of 8.0 V and a maximum clamping voltage (VC) of 13.6 V at 29.4 A - yielding a clamping ratio of ~1.7. This means that during a worst-case 10/1000 μs surge, the protected circuit sees no more than 13.6 V, even though normal operation occurs safely below 8.0 V. The low ratio ensures downstream 5 V or 3.3 V ICs remain within absolute maximum ratings, making SMAJ8.0CAHE3/61 effective for logic-level interface protection.
What is the thermal resistance of SMAJ8.0CAHE3/61, and how does it affect layout design?
SMAJ8.0CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal PCB copper; increasing pad area or adding thermal vias reduces RθJA significantly. For sustained power dissipation or high-ambient environments, designers should verify junction temperature using PD = 3.3 W and derating curves in Fig. 2 - ensuring SMAJ8.0CAHE3/61 remains within its –55 °C to +150 °C operating range.
Can SMAJ8.0CAHE3/61 be used in place of a unidirectional TVS like SMAJ8.0A?
No - SMAJ8.0CAHE3/61 is not a drop-in replacement for unidirectional SMAJ8.0A due to fundamental structural differences: SMAJ8.0CAHE3/61 lacks polarity marking and conducts equally in both directions, while SMAJ8.0A has a cathode band and only clamps in reverse bias. Substituting SMAJ8.0CAHE3/61 for SMAJ8.0A on DC-biased lines may cause unintended forward conduction or increased leakage. Use SMAJ8.0CAHE3/61 only where bidirectional protection is explicitly required and validated in the target circuit topology.
SMAJ8.0CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- 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)
SMAJ8.0CAHE3/61 FAQ
1.How can I place an order for SMAJ8.0CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CAHE3/61 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 SMAJ8.0CAHE3/61 reliable?
The price and inventory of SMAJ8.0CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CAHE3/61?
SMAJ8.0CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CAHE3/61 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 SMAJ8.0CAHE3/61?
For technical support, including SMAJ8.0CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ8.0CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CAHE3/61 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 SMAJ8.0CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CAHE3/61?
All SMAJ8.0CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CAHE3/61, 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 SMAJ8.0CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0CAHE3/61 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 …
