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Vishay General Semiconductor - Diodes Division SMAJ7.5AHM3_A/I
- Part No.:
- SMAJ7.5AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5AHM3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,216
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Product details
Overview
SMAJ7.5AHM3_A/I 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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, and clamps up to 12.9 V at 31.0 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for protecting MOSFETs and ICs in automotive and industrial power rails.
For engineers reviewing the SMAJ7.5AHM3_A/I datasheet, SMAJ7.5AHM3_A/I pinout, SMAJ7.5AHM3_A/I application, or SMAJ7.5AHM3_A/I equivalent, key selection criteria include its 400 W peak pulse power rating (≤78 V), AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and low 0.067 %/°C temperature coefficient of VBR.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast transient suppression (<1 ps response time implied by junction design). Its glass-passivated silicon junction delivers low incremental surge resistance and stable clamping performance across -55 °C to +150 °C operating range.
Rated for 400 W peak pulse power (10/1000 μs), it sustains 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits only 100 μA maximum reverse leakage at VWM, ensuring minimal standby power loss in always-on protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for protected line's normal operating voltage. |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on above nominal rail while avoiding false triggering. |
| VC @ IPPM | 12.9 V at 31.0 A - Clamped voltage during 10/1000 μs surge; defines worst-case overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 400 W - Peak pulse power handling capacity; enables robust protection against IEC 61000-4-5 Level 4 surges when mounted per recommended pad layout. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); supports high-energy inductive switch-off events in motor drivers and solenoid controls. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with automated pick-and-place and reflow soldering (MSL Level 1, 260 °C peak). |
Pinout & Package
Two-terminal unidirectional TVS in SMA (DO-214AC) package. Cathode identified by black band; anode is unmarked end. Designed for PCB mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage events - must route with low-inductance path to reference plane. |
| Anode (unbanded end) | Reference node connection | Typically tied to system ground or lower-potential rail; completes clamping path - requires low-impedance grounding for effective suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance - suitable for engine control, body electronics, and ADAS power domains. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 1; eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating of molding compound. |
| 400 W peak pulse power (≤78 V) | Supports IEC 61000-4-5 combination wave (1.2/50 μs voltage, 8/20 μs current) testing up to Level 4 (4 kV line-to-earth) when properly laid out. |
| Low VBR tempco (0.067 %/°C) | Minimizes drift in clamping threshold across automotive temperature range (-40 °C to +125 °C ambient), improving protection consistency in thermal-cycling environments. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives - critical for high-humidity industrial and outdoor applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) and alternator ripple on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input stage of LDO or DC-DC converter. Use Value: Limits voltage excursion to ≤12.9 V during 31 A surge, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Protecting analog outputs (e.g., 4–20 mA current loops) and digital I/O (CAN, LIN) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transients from signal trace to chassis ground before reaching ADC front-end or transceiver IC. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to safe levels within <1 ns, preserving signal integrity and avoiding data corruption in real-time control networks. |
| Consumer Power Adapter Input Stage | MOSFET Gate Driver Surge Suppression |
|
Use Scenario: Safeguarding primary-side rectifier and controller ICs in offline AC-DC adapters against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-side TVS on DC bus after bridge rectifier, clamping switching spikes and line transients before bulk capacitor. Use Value: Absorbs 400 W pulses without degradation, enabling compact designs that meet UL 62368-1 surge immunity requirements without oversized MOVs. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by isolated gate drivers in motor inverters and SMPS half-bridges. IC Role / Device Role / Timing Role: TVS connected between gate and source terminals to clamp Miller-induced voltage spikes during fast dV/dt switching. Use Value: Limits gate-source voltage to ≤12.9 V during 31 A transient, eliminating need for external Zener clamps and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5AHE3_A/I | Same electrical specs but RoHS-compliant (E3) without halogen-free certification; not AEC-Q101 qualified. | Restricted to commercial/industrial use where automotive qualification is unnecessary. | Select when cost sensitivity outweighs halogen-free or automotive requirements. |
| SMAJ7.5A-M3/61 (Vishay) | Identical electrical parameters and halogen-free construction, but packaged in 7" tape/reel (61 code) instead of 13" (I code); no AEC-Q101 marking. | Limited to non-automotive production with different logistics packaging. | Choose for legacy manufacturing lines requiring 1800-unit reels and no automotive validation. |
Compared with SMAJ7.5AHM3_A/I, SMAJ7.5AHE3_A/I lacks AEC-Q101 validation and halogen-free status, while SMAJ7.5A-M3/61 omits automotive qualification and uses smaller reel packaging - making SMAJ7.5AHM3_A/I the sole option meeting full automotive, environmental, and volume procurement requirements.
Availability
SMAJ7.5AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability assurance.
Supply support for SMAJ7.5AHM3_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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMAJ series targets board-level transient suppression in harsh environments, delivering standardized TVS performance across 5.0 V to 188 V VWM with consistent package, thermal, and surge characteristics for scalable design reuse.
FAQ
What is the clamping voltage of SMAJ7.5AHM3_A/I at its rated peak pulse current?
The SMAJ7.5AHM3_A/I clamps to a maximum of 12.9 V at its specified peak pulse current of 31.0 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ7.5AHM3_A/I suitable for automotive applications?
Yes, SMAJ7.5AHM3_A/I is AEC-Q101 qualified (denoted by HM3 suffix) and rated for operation from -55 °C to +150 °C junction temperature. Its halogen-free, RoHS-compliant construction and validated surge endurance make it appropriate for under-hood and cabin-mounted automotive systems including body control modules, lighting drivers, and infotainment power supplies.
How does the HM3 suffix differ from E3 or M3 in SMAJ7.5AHM3_A/I?
The HM3 suffix in SMAJ7.5AHM3_A/I indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. In contrast, E3 denotes RoHS-compliant only (no halogen-free or automotive qualification), and M3 is halogen-free and RoHS-compliant but not AEC-Q101 validated - making SMAJ7.5AHM3_A/I the only variant meeting full automotive environmental and reliability standards.
What is the reverse leakage current specification for SMAJ7.5AHM3_A/I at its stand-off voltage?
At its 7.5 V stand-off voltage (VWM), SMAJ7.5AHM3_A/I exhibits a maximum reverse leakage current (ID) of 100 μA at 25 °C. This low leakage ensures minimal power loss in always-on protection configurations and avoids unintended loading of sensitive analog or low-power digital circuits connected to the protected line.
Can SMAJ7.5AHM3_A/I be used in bidirectional transient protection circuits?
No, SMAJ7.5AHM3_A/I is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay offers the SMAJ7.5CA variant. Using SMAJ7.5AHM3_A/I in reverse-biased configurations risks permanent damage due to lack of symmetrical breakdown capability - correct polarity alignment is mandatory for safe operation.
SMAJ7.5AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMAJ7.5AHM3_A/I FAQ
1.How can I place an order for SMAJ7.5AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5AHM3_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 SMAJ7.5AHM3_A/I reliable?
The price and inventory of SMAJ7.5AHM3_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 SMAJ7.5AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ7.5AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5AHM3_A/I?
SMAJ7.5AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5AHM3_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 SMAJ7.5AHM3_A/I?
For technical support, including SMAJ7.5AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ7.5AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5AHM3_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 SMAJ7.5AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ7.5AHM3_A/I?
All SMAJ7.5AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5AHM3_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 SMAJ7.5AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ7.5AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5AHM3_A/I Tags
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