My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ7.0AHM3/H
- Part No.:
- SMAJ7.0AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0AHM3/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,232
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ7.0AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal 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 SMAJ7.0AHM3/H datasheet, SMAJ7.0AHM3/H pinout, SMAJ7.0AHM3/H application, or SMAJ7.0AHM3/H equivalent, key selection criteria include its unidirectional polarity, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (<1 μA leakage at 7.0 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, clamping the line to ≤12.0 V within <1 ns response time. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive surge stress.
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports MSL Level 1 moisture sensitivity, and achieves thermal resistance of 120 °C/W (junction-to-ambient) on 0.2" × 0.2" copper pads - enabling robust transient suppression without external heatsinking in space-constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 7.78–8.60 V at 10 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 12.0 V at IPPM = 33.3 A - Peak voltage seen by protected circuit during 400 W transient; determines downstream component stress |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs waveform) - Energy-handling capacity for common lightning/inductive-switching surges; derates above 78 V |
| ID (Reverse Leakage) | 200 μA max at VWM - Low quiescent current preserves system efficiency and avoids false triggering in low-power circuits |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial ambient environments |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with cathode band marking; compatible with JEDEC J-STD-020 reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path); enables unidirectional clamping from cathode to anode |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 7 V supply rail); conducts surge current to anode when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment modules |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20D requirements - supports green manufacturing and end-of-life recycling mandates |
| 400 W peak pulse power (10/1000 μs) | Handles typical ISO 7637-2 Pulse 1/2a/5a transients without degradation - eliminates need for cascaded protection stages |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on and VC/VBR ≈ 1.47 enable tight protection margins for 3.3 V/5 V logic and analog front-ends |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow soldering processes without pre-baking - reduces production complexity and cost |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, triggered only during positive overvoltage events. Use Value: Limits peak voltage to 12.0 V, protecting downstream 16 V-rated DC-DC converters and microcontrollers without derating headroom. |
Use Scenario: Guarding analog outputs of pressure/temperature sensors against ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Clamping element on 0–5 V or 4–20 mA signal lines, positioned adjacent to connector entry point. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF capacitance - preserves signal integrity up to 1 MHz bandwidth. |
| Consumer USB Power Line Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Safeguarding USB-C VBUS input stages in portable chargers and power banks against hot-plug overshoot and adapter faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V input rail, upstream of buck converter and USB PD controller. Use Value: 400 W rating absorbs multiple 10/1000 μs surges per IEC 61000-4-5 Level 3, extending product lifetime beyond 10,000 connect cycles. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Unidirectional TVS across differential pair (tip/ring to ground), coordinated with gas discharge tube (GDT) primary stage. Use Value: 12.0 V clamping prevents saturation of line driver op-amps and maintains >60 dB SNR in voice-band channels during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A-E3/61 | Same electrical specs (VWM = 7.0 V, VC = 12.0 V), but RoHS-compliant commercial grade without halogen-free certification or AEC-Q101 qualification | Lacks automotive qualification and halogen-free compliance - restricted to consumer/commercial designs with no regulatory or environmental constraints | Select when cost sensitivity outweighs automotive or green-material requirements; verify board-level reliability under thermal cycling |
| SMAJ7.0AHE3_A/H | Identical VWM, VBR, and VC ratings, AEC-Q101 qualified, but RoHS-compliant without halogen-free status (contains brominated flame retardants) | Acceptable for automotive use where halogen content is not regulated (e.g., non-EU markets), but fails strict halogen-free procurement policies | Choose when AEC-Q101 is mandatory but halogen-free is optional; confirm regional compliance alignment with OEM tier-1 requirements |
Compared with SMAJ7.0AHM3/H, SMAJ7.0A-E3/61 sacrifices automotive qualification and green-material compliance for lower cost, while SMAJ7.0AHE3_A/H retains AEC-Q101 but omits halogen-free status - making SMAJ7.0AHM3/H the sole option meeting both automotive reliability and full RoHS/halogen-free mandates simultaneously.
Availability
SMAJ7.0AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and consumer power adapter designs requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMAJ7.0AHM3/H 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, power efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, fast response, and standardized packaging are critical design requirements.
FAQ
What is the maximum clamping voltage of the SMAJ7.0AHM3/H under specified test conditions?
The SMAJ7.0AHM3/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 33.3 A using a 10/1000 μs waveform. This value is measured at TA = 25 °C with the device mounted on 0.2" × 0.2" copper pads per Vishay's test standard. The clamping voltage directly defines the upper voltage limit imposed on protected circuitry during surge events, making it a critical parameter for ensuring downstream component survival.
Does the SMAJ7.0AHM3/H meet automotive qualification standards?
Yes, the SMAJ7.0AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code - indicating halogen-free, RoHS-compliant construction validated to the full AEC-Q101 stress test suite including HTGB, HTRB, and temperature cycling. This qualification makes SMAJ7.0AHM3/H suitable for under-hood and cabin applications in passenger vehicles, commercial trucks, and EV powertrain subsystems where component reliability is mission-critical.
How does the SMAJ7.0AHM3/H differ from the SMAJ7.0A-E3/61 variant?
The SMAJ7.0AHM3/H and SMAJ7.0A-E3/61 share identical electrical parameters (VWM = 7.0 V, VC = 12.0 V, PPPM = 400 W), but differ in material and qualification: SMAJ7.0AHM3/H is halogen-free and AEC-Q101 qualified, whereas SMAJ7.0A-E3/61 is RoHS-compliant commercial grade without halogen-free certification or automotive qualification. This makes SMAJ7.0AHM3/H appropriate for Tier-1 automotive BOMs and green-electronics initiatives, while SMAJ7.0A-E3/61 serves cost-sensitive commercial applications.
What is the thermal resistance specification for the SMAJ7.0AHM3/H?
The SMAJ7.0AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). Its junction-to-lead resistance (RθJL) is 30 °C/W. These values determine allowable power dissipation under steady-state conditions and inform layout decisions - for example, maintaining RθJA ≤ 120 °C/W ensures the junction stays below 150 °C at 3.3 W continuous power dissipation (PD).
Can the SMAJ7.0AHM3/H be used in bidirectional transient protection applications?
No, the SMAJ7.0AHM3/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and cathode band marking. It conducts only during positive overvoltage events relative to its cathode. For bidirectional protection - such as AC signal lines or differential buses - a part with "CA" suffix (e.g., SMAJ7.0CA) must be selected. Using SMAJ7.0AHM3/H in bidirectional configurations risks failure during negative transients due to lack of reverse avalanche capability.
SMAJ7.0AHM3/H 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:
- 1
- Bidirectional Channels:
- -
- 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:
- 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)
SMAJ7.0AHM3/H FAQ
1.How can I place an order for SMAJ7.0AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0AHM3/H 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 SMAJ7.0AHM3/H reliable?
The price and inventory of SMAJ7.0AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0AHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ7.0AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0AHM3/H?
SMAJ7.0AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0AHM3/H 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 SMAJ7.0AHM3/H?
For technical support, including SMAJ7.0AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0AHM3/H requirements.
6.How does Aetrix verify that SMAJ7.0AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0AHM3/H 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 SMAJ7.0AHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ7.0AHM3/H?
All SMAJ7.0AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0AHM3/H, 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 SMAJ7.0AHM3/H part is unused and in its original packaging.
Return procedure for SMAJ7.0AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0AHM3/H 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…
