My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ7.5CAHE3_A/I
- Part No.:
- SMAJ7.5CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CAHE3_A/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,661
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ7.5CAHE3_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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), commonly deployed to protect MOSFET gates, sensor interfaces, and automotive ECUs against ESD and load dump.
For engineers reviewing the SMAJ7.5CAHE3_A/I datasheet, SMAJ7.5CAHE3_A/I pinout, SMAJ7.5CAHE3_A/I application, or SMAJ7.5CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.55), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode with symmetrical bidirectional conduction-no polarity marking required-and delivers sub-nanosecond response to transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), while thermal resistance values (RθJA = 120 °C/W, RθJL = 30 °C/W) define derating behavior above 25 °C ambient.
The SMAJ7.5CAHE3_A/I meets UL 497B recognition (QVGQ2, file E136766) for telecom and industrial protectors and supports repetitive surge duty cycles up to 0.01 % under specified mounting conditions. Its 150 °C maximum junction temperature and -55 °C to +150 °C operating range enable use in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse voltage before significant leakage; sets minimum system operating margin. |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - Confirmed breakdown threshold defining clamping onset precision. |
| VC @ IPPM | 12.9 V at 31.0 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's peak stress level. |
| PPPM | 400 W - Peak transient energy absorption capacity under standard waveform; defines surge robustness class. |
| ID @ VWM | 100 μA - Reverse leakage at stand-off voltage; impacts low-power sensor bias integrity. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient automotive or industrial enclosures. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; compatible with standard reflow without dry pack. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Common terminal pair | No polarity marking; symmetrical terminals conduct identically in either direction during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) protection on 12 V supply rails with appropriate PCB layout. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage overshoot during fast transients, reducing risk of downstream IC latch-up or gate oxide damage. |
| MSL Level 1 | Enables direct placement into reflow ovens without baking or humidity-controlled storage. |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime stress conditions. |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start induced surges in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing transients faster than system response time. Use Value: Prevents permanent damage to 5 V logic inputs by limiting voltage to ≤12.9 V during 31 A 10/1000 μs surges, maintaining functional safety compliance. | Use Scenario: Safeguarding differential CANH/CANL lines in factory automation PLCs exposed to motor drive switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS across bus pair to clamp common-mode transients without affecting differential signaling integrity. Use Value: Maintains CAN FD data integrity up to 5 Mbps by suppressing >100 V spikes within <1 ns, avoiding bit errors or bus lockup. |
| Consumer Smart Appliance Sensor Hub | Telecom Power Supply Input Stage |
Use Scenario: Shielding temperature/humidity sensor analog outputs from ESD events during handling or cable coupling in HVAC controllers. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) transient suppressor placed directly at connector entry point before signal conditioning amplifier. Use Value: Limits ESD-induced offset shift in 12-bit ADC readings by clamping ±8 kV contact discharge to <13 V, preserving measurement accuracy. | Use Scenario: Front-end protection for 24 V DC input of PoE-powered network switches subjected to lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: Primary surge arrestor mounted on bulk input rail before DC/DC converter, rated for repetitive 400 W pulses. Use Value: Extends mean time between failures (MTBF) by diverting >100 A surge currents away from upstream rectifiers and filter capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA-E3/61 | Same electrical specs; RoHS-compliant commercial grade (non-AEC-Q101); MSL Level 1; same SMA package. | Lacks automotive qualification; unsuitable for under-hood or safety-critical systems requiring AEC-Q101 traceability. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability documentation. |
| SMCJ7.5CAHE3_A/I | Higher 1500 W PPPM rating; larger SMC (DO-214AB) package; identical VWM/VBR/VC specs; AEC-Q101 qualified. | Requires larger PCB footprint and higher thermal mass; suited for higher-energy surge environments (e.g., 24 V battery systems). | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits larger SMC footprint. |
Compared with SMAJ7.5CAHE3_A/I, the SMAJ7.5CA-E3/61 offers identical protection performance without automotive qualification, while the SMCJ7.5CAHE3_A/I provides 3.75× higher surge power handling in a physically larger package-enabling trade-offs between board density, reliability tier, and surge severity requirements.
Availability
SMAJ7.5CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, AEC-Q101 traceability, and consistent MSL Level 1 handling.
Supply support for SMAJ7.5CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications systems where rapid voltage clamping and long-term parametric stability are critical.
FAQ
What is the clamping voltage of SMAJ7.5CAHE3_A/I at its rated peak pulse current?
The SMAJ7.5CAHE3_A/I has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 31.0 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects the actual voltage seen by downstream circuitry during worst-case transient events, ensuring compatibility with 5 V and 3.3 V logic interfaces when properly laid out.
Is SMAJ7.5CAHE3_A/I suitable for automotive applications?
Yes, SMAJ7.5CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability requirements, making it appropriate for body control modules, infotainment interfaces, and ADAS sensor protection circuits.
Does SMAJ7.5CAHE3_A/I have polarity markings on the package?
No, SMAJ7.5CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Its symmetrical construction allows installation in either orientation across a signal line or power rail, simplifying PCB layout and eliminating risk of reverse installation during automated assembly.
What is the maximum junction temperature rating for SMAJ7.5CAHE3_A/I?
The SMAJ7.5CAHE3_A/I has a maximum junction temperature (TJ max.) of +150 °C, enabling reliable operation in high-ambient environments such as engine compartments, industrial motor drives, and enclosed telecom equipment. Derating curves in the datasheet specify allowable power dissipation reduction above 25 °C ambient to maintain this limit.
How does the 400 W peak pulse power rating of SMAJ7.5CAHE3_A/I relate to real-world surge standards?
The 400 W peak pulse power rating of SMAJ7.5CAHE3_A/I corresponds to compliance with IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 Ω source impedance) for 12 V systems when mounted on 5.0 mm × 5.0 mm copper pads. This validates its suitability for protecting sensitive electronics against lightning-induced surges and inductive switching transients in automotive and industrial settings.
SMAJ7.5CAHE3_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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ7.5CAHE3_A/I FAQ
1.How can I place an order for SMAJ7.5CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CAHE3_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 SMAJ7.5CAHE3_A/I reliable?
The price and inventory of SMAJ7.5CAHE3_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 SMAJ7.5CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CAHE3_A/I?
SMAJ7.5CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CAHE3_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 SMAJ7.5CAHE3_A/I?
For technical support, including SMAJ7.5CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ7.5CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CAHE3_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 SMAJ7.5CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CAHE3_A/I?
All SMAJ7.5CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CAHE3_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 SMAJ7.5CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ7.5CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5CAHE3_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
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…
