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Vishay General Semiconductor - Diodes Division SMA5J40CHE3/5A
- Part No.:
- SMA5J40CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CHE3/5A.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,489
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Product details
Overview
SMA5J40CHE3/5A from Vishay General Semiconductor is a high-power unidirectional Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 40 V standoff voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), 64.5 V clamping voltage (VC) at 7.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages to protect downstream MOSFETs and microcontrollers.
For engineers reviewing the SMA5J40CHE3/5A datasheet, SMA5J40CHE3/5A pinout, SMA5J40CHE3/5A application, or SMA5J40CHE3/5A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device triggered by transient overvoltage events exceeding its reverse standoff voltage (40 V). Its silicon avalanche junction provides sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of ESD, load dump, and inductive switching spikes in automotive and industrial environments.
The device is rated for non-repetitive 8.3 ms half-sine surge current up to 40 A (IFSM) and exhibits thermal resistance of 80 °C/W (junction-to-ambient) when mounted per recommended pad layout. Its unidirectional configuration requires cathode band orientation during PCB layout, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection threshold. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown voltage range at 1 mA test current; ensures reliable triggering above nominal system voltage. |
| VC @ IPPM | 64.5 V - Clamping voltage at 7.8 A peak pulse current; limits maximum voltage seen by protected ICs during transients. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy surge immunity per ISO 7637-2. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against load-dump events. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; informs thermal derating in compact layouts. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential node; forms clamping path when cathode is at higher potential. |
| Cathode (banded end) | Reverse voltage input / Clamping output | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per stress test requirements. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, critical for under-hood deployment. |
| MSL Level 1 rating | Enables single-reflow assembly without dry-packaging or baking, reducing manufacturing cost and complexity. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability, supporting safety-critical industrial designs. |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤64.5 V, preventing damage to upstream PMICs and MCU power inputs rated for 40 V absolute maximum. | Use Scenario: Safeguarding programmable logic controllers (PLCs) against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff-clamp protector on 24 V DC control bus feeding relay coils and digital I/O modules. Use Value: Absorbs 500 W surges without degradation, maintaining system uptime in factory automation where coil switching occurs multiple times per second. |
| Automotive Sensor Signal Line Guard | Telecom DC Power Interface |
Use Scenario: Shielding LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface, shunting transients to chassis ground. Use Value: Sub-nanosecond response preserves signal integrity on 19.2 kbps LIN networks while meeting ISO 10605 ±8 kV contact discharge requirements. | Use Scenario: Protecting PoE-powered network switches and base station radios from lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution before DC/DC converters. Use Value: Withstands repeated 10/1000 µs surges up to 500 W, extending field life in outdoor telecom cabinets exposed to high ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ40AHE3/A | Same DO-214AC package, 40 V VWM, but 64.5 V VC at 7.7 A; slightly lower IPPM (7.7 A vs. 7.8 A); identical AEC-Q101 qualification. | Functionally interchangeable in automotive power rails; minor VC variance has no impact on protected IC margins. | Select when dual-sourcing across Littelfuse/Vishay supply chains is required for BOM resilience. |
| ON Semiconductor SMA5J40AHE3/A | Identical electrical specs (VWM, VBR, VC, PPPM), same DO-214AC package and AEC-Q101 qualification; differs only in branding and traceability documentation. | No functional or layout impact; validated drop-in replacement in existing automotive designs. | Preferred for designs already using ON Semi's TVS portfolio to simplify qualification and procurement. |
Compared with SMA5J40CHE3/5A, Littelfuse SMAJ40AHE3/A offers near-identical clamping performance with marginal current rating difference, while ON Semi SMA5J40AHE3/A delivers true functional equivalence and seamless integration into legacy ON Semi-based platforms.
Availability
SMA5J40CHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power interface modules requiring stable component supply and AEC-Q101 compliance.
Supply support for SMA5J40CHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMA5J series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power systems, industrial controls, and telecom infrastructure where sustained surge immunity and long-term stability are mandatory.
FAQ
What is the polarity configuration of SMA5J40CHE3/5A?
SMA5J40CHE3/5A is a unidirectional TVS diode, meaning it conducts only in reverse bias during overvoltage events. The cathode is marked by a band on the package body, and the device must be oriented with cathode toward the protected line and anode toward ground or lower potential. This configuration prevents forward conduction during normal operation while enabling precise clamping above 40 V.
Is SMA5J40CHE3/5A qualified for automotive applications?
Yes, SMA5J40CHE3/5A carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay's documentation. It undergoes stress testing for temperature cycling, mechanical shock, and humidity resistance required for under-hood and chassis-mounted automotive electronics, making SMA5J40CHE3/5A suitable for engine control modules, body control units, and ADAS power supplies.
What is the maximum clamping voltage of SMA5J40CHE3/5A and at what current is it specified?
The maximum clamping voltage (VC) of SMA5J40CHE3/5A is 64.5 V, measured at a peak pulse current (IPPM) of 7.8 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transients, ensuring compatibility with 40 V-rated downstream components in SMA5J40CHE3/5A-based designs.
Does SMA5J40CHE3/5A require special PCB layout considerations?
Yes - SMA5J40CHE3/5A must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in the Vishay datasheet. This pad area ensures adequate heat dissipation and maintains the rated 500 W peak pulse power capability. Smaller pads cause thermal derating and reduce surge survivability, directly impacting SMA5J40CHE3/5A's protection performance.
What does the "HE3" and "5A" suffix mean in SMA5J40CHE3/5A?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "5A" denotes the packaging format: 7500 units per 13-inch diameter plastic tape-and-reel. This distinguishes SMA5J40CHE3/5A from commercial-grade E3 variants and smaller reels like /61, ensuring traceability and compliance for high-reliability automotive production runs.
SMA5J40CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 7A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J40CHE3/5A FAQ
1.How can I place an order for SMA5J40CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CHE3/5A 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 SMA5J40CHE3/5A reliable?
The price and inventory of SMA5J40CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J40CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CHE3/5A?
SMA5J40CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CHE3/5A 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 SMA5J40CHE3/5A?
For technical support, including SMA5J40CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CHE3/5A requirements.
6.How does Aetrix verify that SMA5J40CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J40CHE3/5A 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 SMA5J40CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J40CHE3/5A?
All SMA5J40CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CHE3/5A, 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 SMA5J40CHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J40CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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