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Vishay General Semiconductor - Diodes Division SMA5J40AHE3/5A
- Part No.:
- SMA5J40AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40AHE3/5A.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,463
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Product details
Overview
SMA5J40AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on 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 at 7.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMA5J40AHE3/5A datasheet, SMA5J40AHE3/5A pinout, SMA5J40AHE3/5A application, or SMA5J40AHE3/5A equivalent, key selection criteria include clamping performance under 500 W surge, AEC-Q101 qualification status, unidirectional polarity marking, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (44.4–49.1 V), it avalanches to limit transient energy by diverting surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at 40 V).
Designed for single-pulse transients per IEC 61000-4-5 (10/1000 µs), it delivers 7.8 A peak pulse current (IPPM) with 64.5 V clamping voltage (VC), and supports operation from –55 °C to +150 °C junction temperature. The SMA package enables surface-mount integration with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 48 V systems. |
| VBR min/max | 44.4 V / 49.1 V - guaranteed avalanche initiation range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 64.5 V at 7.8 A - clamped voltage during 500 W transient; determines maximum stress imposed on protected circuitry. |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; validates robustness against lightning-induced surges. |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments with localized heating. |
| Polarity | Unidirectional - cathode marked with band; prevents forward conduction during normal operation while enabling reverse surge clamping. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / surge input node | Marked with band; connects to protected line (e.g., 48 V rail); avalanches when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics; supports PPAP documentation. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime; critical for long-term reliability in harsh environments. |
| MSL Level 1 (260 °C) | Enables standard reflow soldering without pre-baking; compatible with high-volume automated assembly lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a); improves clamping fidelity. |
| 500 W peak pulse power | Withstands IEC 61000-4-5 Combination Wave (1.2/50 µs voltage, 8/20 µs current) surges up to ±1 kV on 50 Ω source impedance. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 40 V. Use Value: Limits peak voltage to 64.5 V during 500 W transients, preventing damage to 65 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Reverse-biased TVS on 24 V sensor supply line to absorb ESD and switching noise from solenoid drivers. Use Value: Clamps 8/20 µs surges to ≤64.5 V within nanoseconds, preserving signal integrity and avoiding ADC saturation or latch-up. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Surge suppression on -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Cathode-connected to -48 V rail, anode to ground; clamps positive-going transients induced by cable coupling. Use Value: Maintains <1.0 µA leakage at -40 V, minimizing standby power loss while delivering 500 W transient immunity. |
Use Scenario: Input rail protection for BLDC motor controllers in smart washing machines exposed to inductive kickback. IC Role / Device Role / Timing Role: Mounted across H-bridge supply pins to clamp flyback spikes generated during MOSFET turn-off. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), surviving repeated motor stall events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40A-E3/5A | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMA package. | Restricted to non-automotive industrial or consumer use where automotive reliability certification is not required. | Select when cost sensitivity outweighs automotive qualification needs and full traceability is not mandated. |
| SMA5J40CAHE3/5A | Bidirectional variant; symmetric clamping in both polarities; same VWM (40 V), VC (64.5 V), and PPPM (500 W). | Required for AC-coupled or floating signal lines subject to bipolar transients (e.g., RS-485, CAN bus stubs). | Choose only if bidirectional protection is essential; unidirectional SMA5J40AHE3/5A offers lower leakage and avoids unnecessary complexity for DC rails. |
Compared with SMA5J40A-E3/5A, the SMA5J40AHE3/5A adds AEC-Q101 qualification and extended traceability for automotive programs; versus SMA5J40CAHE3/5A, it provides superior leakage performance and polarity-specific clamping for fixed-rail DC protection.
Availability
SMA5J40AHE3/5A is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interface protection, and telecom DC feed applications requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant manufacturing.
Supply support for SMA5J40AHE3/5A 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, power density, and automotive-grade validation.
The SMA5J series was engineered for high-power-density transient suppression in space-constrained automotive and industrial designs, prioritizing low clamping voltage, fast response, and AEC-Q101 qualification from wafer to final test.
FAQ
What is the clamping voltage of the SMA5J40AHE3/5A under a 500 W transient?
The SMA5J40AHE3/5A clamps to 64.5 V at its rated peak pulse current of 7.8 A, measured with a 10/1000 µs waveform. This value is guaranteed across the operating temperature range and forms the basis for downstream circuit voltage margining. The SMA5J40AHE3/5A achieves this with low incremental surge resistance, minimizing overshoot during fast-rising transients.
Is the SMA5J40AHE3/5A qualified for automotive applications?
Yes, the SMA5J40AHE3/5A is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88875. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and surge endurance - making the SMA5J40AHE3/5A suitable for engine control, body electronics, and ADAS power domains.
How does the SMA5J40AHE3/5A differ from the SMA5J40A-E3/5A?
The SMA5J40AHE3/5A and SMA5J40A-E3/5A share identical electrical specifications and SMA (DO-214AC) packaging, but only the HE3 version carries AEC-Q101 qualification and enhanced traceability for automotive production. The SMA5J40AHE3/5A also uses a halogen-free molding compound compliant with Vishay's HM3/HE3 material standards.
What is the maximum operating temperature for the SMA5J40AHE3/5A?
The SMA5J40AHE3/5A has a maximum junction temperature (TJ max) of +150 °C and operates from –55 °C to +150 °C. Its thermal resistance RθJA is 80 °C/W on standard 5.0 mm × 5.0 mm copper pads, enabling reliable operation in under-hood environments when properly mounted and derated per Figure 2 in the datasheet.
Does the SMA5J40AHE3/5A have polarity marking, and how is it oriented?
Yes, the SMA5J40AHE3/5A is unidirectional and features a visible cathode band on the SMA (DO-214AC) package body. During PCB layout, the banded end must connect to the protected line (e.g., 48 V rail), while the anode connects to ground - ensuring correct avalanche behavior during reverse transients. No marking exists on bidirectional variants like SMA5J40CAHE3/5A.
SMA5J40AHE3/5A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMA5J40AHE3/5A FAQ
1.How can I place an order for SMA5J40AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40AHE3/5A 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 SMA5J40AHE3/5A reliable?
The price and inventory of SMA5J40AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J40AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40AHE3/5A?
SMA5J40AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40AHE3/5A 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 SMA5J40AHE3/5A?
For technical support, including SMA5J40AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40AHE3/5A requirements.
6.How does Aetrix verify that SMA5J40AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J40AHE3/5A 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 SMA5J40AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J40AHE3/5A?
All SMA5J40AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40AHE3/5A, 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 SMA5J40AHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J40AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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