My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ8.0CAHM3/I
- Part No.:
- SMAJ8.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CAHM3/I.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,507
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ8.0CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 8.0 V stand-off voltage (VWM), 6.40–7.07 V breakdown voltage (VBR) at 10 mA test current, and clamps transients to ≤13.6 V at 29.4 A peak pulse current (IPPM) under 10/1000 μs waveform - deployed on power rails and signal lines in automotive sensor interfaces.
For engineers reviewing the SMAJ8.0CAHM3/I datasheet, SMAJ8.0CAHM3/I pinout, SMAJ8.0CAHM3/I application, or SMAJ8.0CAHM3/I equivalent, this device is evaluated for ESD and load-dump surge immunity in AEC-Q101-compliant automotive modules, industrial I/O protection, and low-capacitance data line safeguarding where fast response (<1 ns), low clamping voltage, and halogen-free RoHS compliance are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (6.40 V / 7.07 V), ID ≤50 μA at VWM, and thermal resistance RθJA = 120 °C/W. Its glass-passivated junction ensures stable leakage and repeatable clamping behavior under repetitive surge stress.
The device delivers 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that threshold. It meets MSL level 1 per J-STD-020, supports 260 °C reflow peak, and is qualified to AEC-Q101 - confirming suitability for under-hood automotive environments with TJ = −55 °C to +150 °C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping initiates; sets safe margin below system rail voltage. |
| VBR (min/max) | 6.40 V / 7.07 V at IT = 10 mA - defines tight breakdown window ensuring predictable turn-on during transients. |
| VC @ IPPM | 13.6 V at IPPM = 29.4 A - clamping voltage limits downstream IC stress during 400 W surge events. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak pulse power rating determines survivability against ISO 7637-2 load dump or inductive switch-off spikes. |
| ID @ VWM | ≤50 μA - ultra-low leakage preserves battery life and avoids false triggering in high-impedance sensor circuits. |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly; 5.28 mm × 4.50 mm outline with 2.54 mm lead pitch. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance. |
| RoHS & Halogen-Free | HM3 suffix denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current path (dual-directional) | No polarity marking; either terminal accepts positive or negative transients - simplifies PCB layout and eliminates orientation errors. |
| Case / Body | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad mounting (0.2" × 0.2") required to achieve rated PPPM and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables single-device protection against severe ISO 16750-2 load dump pulses without external series impedance. |
| Clamping voltage ≤13.6 V at 29.4 A | Keeps protected ICs (e.g., CAN transceivers, microcontrollers) within absolute maximum ratings during surge events. |
| Response time <1 ns | Activates before transient energy couples into downstream circuitry - critical for high-speed signal line protection. |
| AEC-Q101 qualified & MSL Level 1 | Supports zero-defect automotive production with guaranteed reflow compatibility and long-term field reliability. |
| Halogen-free, RoHS-compliant (HM3) | Fulfills strict environmental compliance for global OEM supply chains without compromising electrical performance. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from battery transients and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing ±1 kV ESD (IEC 61000-4-2) and 12 V load dump surges. Use Value: Prevents latch-up or gate oxide damage in connected MCUs and transceivers while maintaining signal integrity due to low capacitance (<100 pF). |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp across input terminals, shunting surge current away from optocoupler input stages and upstream protection ICs. Use Value: Eliminates need for additional series resistors or Zener stacks - reduces BOM count and improves response consistency across channel banks. |
| Consumer Power Adapter Output | Telecom Ethernet PHY Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5–12 V DC outputs of wall adapters and USB PD chargers subject to no-load regulation overshoot. IC Role / Device Role / Timing Role: Fast-acting crowbar device limiting output voltage excursion during feedback loop failure or transient load steps. Use Value: Prevents damage to connected devices (e.g., smartphones, IoT hubs) by clamping output to ≤13.6 V before regulator shutdown occurs. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY pins from lightning-induced surges and hot-plug ESD on RJ45 ports. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed differential-mode across MDI pairs, referenced to chassis ground. Use Value: Maintains signal integrity up to 100 MHz while meeting IEC 61000-4-5 Level 2 (1 kV) surge immunity without degrading insertion loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CAHE3/I | Same VWM/VBR/VC specs, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Approved for commercial and industrial use; not certified for halogen-free automotive programs requiring IEC 61249-2-21 compliance. | Select SMAJ8.0CAHE3/I when halogen content is unrestricted and cost optimization is prioritized over automotive material traceability. |
| SMBJ8.0CAHM3/I | Same electrical specs but in larger SMB (DO-214AA) package - higher thermal mass, RθJA = 80 °C/W, PPPM = 600 W. | Better suited for high-repetition surge environments (e.g., motor drive I/O) where sustained power dissipation exceeds SMAJ rating. | Choose SMBJ8.0CAHM3/I when board space allows and thermal margin must exceed 400 W single-pulse capability. |
Compared with SMAJ8.0CAHE3/I, the SMAJ8.0CAHM3/I adds halogen-free assurance for Tier 1 automotive supply chains; versus SMBJ8.0CAHM3/I, it trades thermal headroom and surge capacity for compactness and lower profile - ideal for space-constrained sensor modules.
Availability
SMAJ8.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and telecom port-level surge immunity requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ8.0CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer systems - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the clamping voltage of SMAJ8.0CAHM3/I at its rated peak pulse current?
The SMAJ8.0CAHM3/I clamps to a maximum of 13.6 V at its specified peak pulse current (IPPM) of 29.4 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects worst-case voltage seen by downstream circuitry during surge events - critical for verifying compatibility with IC absolute maximum ratings. The SMAJ8.0CAHM3/I maintains this clamping performance across its full operating temperature range.
Is SMAJ8.0CAHM3/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMAJ8.0CAHM3/I is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_X" (where "X" denotes revision). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and surge endurance - making it approved for under-hood and cabin electronics such as body control modules and ADAS sensor interfaces. The SMAJ8.0CAHM3/I meets all requirements for automotive-grade transient suppression.
How does the HM3 suffix differ from E3 or HE3 in the SMAJ8.0CAHM3/I part number?
The HM3 suffix in SMAJ8.0CAHM3/I indicates halogen-free, RoHS-compliant construction per Vishay's material standards, whereas E3 denotes RoHS-compliant only, and HE3 adds AEC-Q101 qualification without halogen-free assurance. The "I" denotes 13-inch tape-and-reel packaging (7500 units). All three share identical electrical specifications, but SMAJ8.0CAHM3/I satisfies stricter environmental mandates for global OEM programs - a key distinction verified in Vishay's official ordering information table.
What is the maximum reverse leakage current of SMAJ8.0CAHM3/I at its stand-off voltage?
The SMAJ8.0CAHM3/I exhibits a maximum reverse leakage current (ID) of 50 μA at its 8.0 V stand-off voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power drain in battery-powered systems and avoids false triggering in high-impedance monitoring circuits. Leakage remains within specification up to TJ = 125 °C, supporting reliable operation in thermally demanding environments.
Can SMAJ8.0CAHM3/I be used in bidirectional signal line protection without polarity concerns?
Yes, SMAJ8.0CAHM3/I is a bidirectional TVS diode - its CA suffix confirms symmetrical breakdown behavior in both polarities, with identical VBR min/max (6.40 V / 7.07 V) and clamping characteristics regardless of voltage polarity. There is no cathode band marking, and either terminal functions identically - enabling straightforward placement on differential pairs, AC-coupled lines, or any application where polarity reversal may occur. This design eliminates orientation errors during automated assembly.
SMAJ8.0CAHM3/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:
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ8.0CAHM3/I FAQ
1.How can I place an order for SMAJ8.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CAHM3/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 SMAJ8.0CAHM3/I reliable?
The price and inventory of SMAJ8.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CAHM3/I?
SMAJ8.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CAHM3/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 SMAJ8.0CAHM3/I?
For technical support, including SMAJ8.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CAHM3/I requirements.
6.How does Aetrix verify that SMAJ8.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CAHM3/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 SMAJ8.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CAHM3/I?
All SMAJ8.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CAHM3/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 SMAJ8.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMAJ8.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0CAHM3/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
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 …
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…
