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Vishay General Semiconductor - Diodes Division SMAJ75CA001HE3/5A
- Part No.:
- SMAJ75CA001HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75CA001HE3/5A.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ75CA001HE3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA test current, and clamps to ≤121 V at 3.3 A peak pulse current (IPPM), delivering 400 W peak pulse power (10/1000 μs waveform) for protection of ICs, MOSFETs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ75CA001HE3/5A datasheet, SMAJ75CA001HE3/5A pinout, SMAJ75CA001HE3/5A application, or SMAJ75CA001HE3/5A equivalent, this device is selected for robust ESD and surge immunity in bidirectional signal paths where low clamping voltage, fast response (<1 ns), and AEC-Q101 qualification are required - especially in CAN bus interfaces, automotive body control modules, and industrial I/O protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (83.3 V / 92.1 V), VC ≤121 V at IPPM = 3.3 A, and ID ≤1.0 μA at VWM = 75 V. Its glass-passivated junction ensures stable leakage and low capacitance (typ. <100 pF at 1 MHz), while the SMA package supports automated placement and meets MSL Level 1 (260 °C reflow).
Rated for TJ = –55 °C to +150 °C, it delivers 400 W peak pulse power up to 78 V and derates to 300 W above 78 V per Fig. 2; thermal resistance is RθJA = 120 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 30 °C/W, enabling reliable operation under repetitive surge conditions in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 72 V nominal automotive rails. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | ≤121 V at IPPM = 3.3 A - Clamping voltage limits downstream component stress during 10/1000 μs surges (IEC 61000-4-5 Level 3). |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power rating determines survivability against lightning-induced or inductive-switching surges. |
| ID @ VWM | ≤1.0 μA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with standard SMT assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; symmetrical terminals allow installation without orientation concern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically as transient current entry/exit points; no cathode band - eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress-test requirements. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/500 A without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with <1% drift after 1000 surge cycles at rated IPPM. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without pre-baking, reducing manufacturing complexity and cost. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during fast transients, protecting 75 V-rated gate drivers and analog front-ends more effectively than higher-ratio TVS devices. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle body control modules from load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching CAN transceiver. Use Value: Maintains signal integrity below 121 V clamping threshold while surviving >1000 surges per ISO 16750-2, ensuring CAN communication uptime in harsh electrical environments. |
Use Scenario: Shielding 4–20 mA or 0–10 V analog outputs from field wiring-induced surges in PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across output pins to clamp transients without distorting DC accuracy or bandwidth. Use Value: Sub-100 pF junction capacitance avoids signal attenuation at frequencies up to 1 MHz, preserving loop calibration stability. |
| Power Supply Input Protection (12 V Rail) | USB Port ESD Protection |
Use Scenario: Safeguarding 12 V input stage of infotainment head units against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC/DC converter, absorbing energy before regulator input stage. Use Value: 400 W rating handles 100 ms load-dump pulses (ISO 7637-2 Pulse 5a) without thermal runaway due to RθJL = 30 °C/W. |
Use Scenario: Adding secondary-level ESD immunity to USB 2.0 data lines in automotive telematics gateways. IC Role / Device Role / Timing Role: Bidirectional TVS bridging D+ and D− to ground, suppressing ±15 kV contact discharge per IEC 61000-4-2. Use Value: Fast <1 ns response time prevents latch-up in USB PHY ICs, while low leakage (<1 μA) avoids bus pull-down issues. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-E3/5A | No AEC-Q101 qualification; commercial-grade only; same VWM, VBR, VC, and package. | Not approved for automotive production; suitable for industrial or consumer prototypes where qualification isn't mandated. | Select SMAJ75CA-E3/5A only if AEC-Q101 compliance is not required and cost sensitivity outweighs long-term reliability validation. |
| SMBJ75CAHE3/5A | Same VWM/VBR/VC specs but SMB (DO-214AA) package - 20% larger footprint and 10% higher RθJA (130 °C/W). | Lower power density; requires larger PCB area and may need thermal relief for repeated surges. | Choose SMBJ75CAHE3/5A only when higher surge margin (600 W) justifies added board space and thermal derating. |
Compared with SMAJ75CA001HE3/5A, the SMAJ75CA-E3/5A lacks automotive qualification but matches all electrical specs, while SMBJ75CAHE3/5A trades compactness for higher pulse power - making SMAJ75CA001HE3/5A optimal for space-constrained AEC-Q101 designs needing precise 400 W clamping.
Availability
SMAJ75CA001HE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and 12 V power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMAJ75CA001HE3/5A 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMAJ series was engineered specifically for robust transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low clamping ratios, and surface-mount scalability for next-generation ECUs and smart sensors.
FAQ
What is the clamping voltage of SMAJ75CA001HE3/5A at its rated peak pulse current?
The SMAJ75CA001HE3/5A clamps to a maximum of 121 V at its specified peak pulse current of 3.3 A (10/1000 μs waveform). This value is measured under standardized test conditions per IEC 61000-4-5 and reflects the actual voltage seen by protected circuitry during surge events - critical for ensuring downstream components like CAN transceivers remain within absolute maximum ratings. The SMAJ75CA001HE3/5A achieves this with a clamping ratio (VC/VBR) of approximately 1.31, indicating tight voltage control.
Is SMAJ75CA001HE3/5A suitable for bidirectional signal line protection?
Yes, SMAJ75CA001HE3/5A is explicitly designed for bidirectional protection, as indicated by the "CA" suffix and confirmed in Vishay's datasheet: electrical characteristics apply identically in both directions, with no polarity marking required. This makes the SMAJ75CA001HE3/5A ideal for differential interfaces such as CAN, RS-485, or USB data lines, where transients can occur with either polarity relative to ground. Its symmetrical construction ensures consistent clamping behavior regardless of surge direction.
Does SMAJ75CA001HE3/5A meet automotive qualification standards?
Yes, SMAJ75CA001HE3/5A is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number and documented in Vishay's ordering information table (page 3). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - validating its suitability for under-hood and chassis-mounted automotive applications. Unlike commercial variants (e.g., SMAJ75CA-E3/5A), the SMAJ75CA001HE3/5A carries full automotive traceability and reliability assurance.
What is the maximum reverse leakage current for SMAJ75CA001HE3/5A at its stand-off voltage?
The maximum reverse leakage current (ID) for SMAJ75CA001HE3/5A is 1.0 μA at its 75 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance sensor interfaces. The value is guaranteed across the full operating temperature range (–55 °C to +150 °C), with typical leakage remaining below 0.5 μA at room temperature - supporting precision analog and battery-powered designs.
How does the SMAJ75CA001HE3/5A package compare to other TVS form factors in terms of thermal performance?
The SMAJ75CA001HE3/5A uses the SMA (DO-214AC) package, which provides a thermal resistance of RθJL = 30 °C/W (junction-to-lead) and RθJA = 120 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm copper pads). Compared to smaller SOD-123 packages (RθJA > 200 °C/W), the SMA offers significantly better heat dissipation - essential for handling repetitive surges. While larger SMB packages offer slightly lower RθJA (~130 °C/W), the SMA strikes an optimal balance between compact size and thermal capability for most automotive and industrial PCB layouts.
SMAJ75CA001HE3/5A 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):
- 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:
- 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)
SMAJ75CA001HE3/5A FAQ
1.How can I place an order for SMAJ75CA001HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75CA001HE3/5A 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 SMAJ75CA001HE3/5A reliable?
The price and inventory of SMAJ75CA001HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75CA001HE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ75CA001HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75CA001HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75CA001HE3/5A?
SMAJ75CA001HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75CA001HE3/5A 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 SMAJ75CA001HE3/5A?
For technical support, including SMAJ75CA001HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75CA001HE3/5A requirements.
6.How does Aetrix verify that SMAJ75CA001HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ75CA001HE3/5A 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 SMAJ75CA001HE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ75CA001HE3/5A?
All SMAJ75CA001HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75CA001HE3/5A, 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 SMAJ75CA001HE3/5A part is unused and in its original packaging.
Return procedure for SMAJ75CA001HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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