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Vishay General Semiconductor - Diodes Division SMAJ75CAHE3_A/H
- Part No.:
- SMAJ75CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75CAHE3_A/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,007
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Product details
Overview
SMAJ75CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 3.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ75CAHE3_A/H datasheet, SMAJ75CAHE3_A/H pinout, SMAJ75CAHE3_A/H application, or SMAJ75CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protection element across two terminals, responding to both positive and negative transients without polarity dependence. Its glass-passivated junction enables fast response time (<1 ps) and stable clamping under repetitive surge conditions up to 0.01% duty cycle.
The SMAJ75CAHE3_A/H is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) when mounted per recommended pad layout. Its bidirectional symmetry ensures identical electrical behavior in either direction, eliminating need for orientation during placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 83.3 V / 92.1 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 121 V at 3.3 A - Clamped voltage during 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capacity; supports robust protection against lightning-induced or inductive-switching surges. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates ruggedness against short-duration overcurrent. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-temperature industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 0.208" × 0.157" footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping occurs regardless of polarity - eliminates orientation constraints in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) when properly laid out with 0.2" × 0.2" copper pads. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during transients - critical for safeguarding 75 V-rated power rails and gate drivers. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump and jump-start transients on 24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across input terminals of DC/DC converters and LDOs. Use Value: Limits transient voltage to ≤121 V, preventing damage to 36 V-rated input stages while maintaining AEC-Q101 compliance. |
Use Scenario: Shields analog front-end inputs of pressure/temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional shunt protector between differential signal pair and ground in CAN or LIN subsystems. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response, preserving signal integrity below 1 MHz bandwidth. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Guards PoE-powered equipment inputs against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input rail upstream of hot-swap controllers and PMICs. Use Value: Absorbs 400 W surge energy without degradation, enabling compliance with ITU-T K.21 basic protection requirements. |
Use Scenario: Protects microcontroller GPIOs and H-bridge gate drivers from back-EMF spikes generated by brushed DC motors. IC Role / Device Role / Timing Role: Clamp device connected between motor supply rail and ground, triggered by inductive kickback exceeding 75 V. Use Value: Limits flyback voltage to 121 V, preventing latch-up or oxide rupture in 100 V-rated MOSFETs and logic-level drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-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. | Choose SMAJ75CA-M3/61 when environmental compliance requires absence of brominated flame retardants. |
| SMBJ75CAHE3_A/H | Same VWM/VC ratings but in SMB (DO-214AA) package - 25% larger footprint and higher thermal mass. | Lower RθJA (85 °C/W vs. 120 °C/W) allows higher sustained surge duty cycles in thermally constrained layouts. | Choose SMBJ75CAHE3_A/H when board space permits and thermal derating margins must exceed 30% above ambient. |
Compared with SMAJ75CAHE3_A/H, the SMAJ75CA-M3/61 offers identical protection performance with halogen-free packaging, while SMBJ75CAHE3_A/H trades smaller footprint for improved thermal dissipation - enabling longer surge endurance in high-power industrial drives.
Availability
SMAJ75CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ75CAHE3_A/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, efficiency, and application-specific optimization.
The SMAJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where rapid clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMAJ75CAHE3_A/H at its rated peak pulse current?
The SMAJ75CAHE3_A/H has a maximum clamping voltage (VC) of 121 V at 3.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 121 V during surge events - a critical parameter for protecting 75 V-rated power stages. The SMAJ75CAHE3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ75CAHE3_A/H suitable for automotive applications?
Yes, SMAJ75CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It meets rigorous stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS power supplies. The SMAJ75CAHE3_A/H also complies with RoHS and is rated for operation up to +150 °C junction temperature, satisfying under-hood thermal requirements.
How does the bidirectional design of SMAJ75CAHE3_A/H affect PCB layout?
The SMAJ75CAHE3_A/H has no polarity marking and functions identically in both directions, so PCB layout requires no orientation alignment - simplifying automated placement and reducing assembly errors. Unlike unidirectional TVS diodes, the SMAJ75CAHE3_A/H can be placed across any two points needing symmetrical overvoltage protection, such as AC signal lines, differential buses, or floating power domains. Its DO-214AC (SMA) package fits standard 0.2" × 0.2" copper pads without modification.
What is the peak pulse power rating of SMAJ75CAHE3_A/H and under what test condition?
The SMAJ75CAHE3_A/H is rated for 400 W peak pulse power (PPPM) using the standardized 10/1000 μs double-exponential current waveform defined in ANSI/IEEE C62.35. This rating applies at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. Above 78 V VWM, the rating reduces to 300 W - a derating explicitly confirmed for SMAJ75CAHE3_A/H in the datasheet's maximum ratings table.
Does SMAJ75CAHE3_A/H require special handling or moisture sensitivity precautions?
No - SMAJ75CAHE3_A/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be processed using standard SMT reflow profiles without pre-baking. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the molding compound meets UL 94 V-0 flammability requirements. These attributes make the SMAJ75CAHE3_A/H suitable for high-volume automated assembly without special handling protocols.
SMAJ75CAHE3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 3.3A
- 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)
SMAJ75CAHE3_A/H FAQ
1.How can I place an order for SMAJ75CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75CAHE3_A/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 SMAJ75CAHE3_A/H reliable?
The price and inventory of SMAJ75CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ75CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75CAHE3_A/H?
SMAJ75CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75CAHE3_A/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 SMAJ75CAHE3_A/H?
For technical support, including SMAJ75CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ75CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ75CAHE3_A/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 SMAJ75CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ75CAHE3_A/H?
All SMAJ75CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75CAHE3_A/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 SMAJ75CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ75CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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