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Vishay General Semiconductor - Diodes Division SMA5J40HE3/5A
- Part No.:
- SMA5J40HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40HE3/5A.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,819
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Product details
Overview
SMA5J40HE3/5A from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 40 V stand-off voltage (VWM), 64.5 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used in automotive power supply input stages to protect downstream MOSFETs and microcontrollers.
For engineers reviewing the SMA5J40HE3/5A datasheet, SMA5J40HE3/5A pinout, SMA5J40HE3/5A application, or SMA5J40HE3/5A equivalent, key selection criteria include verified clamping performance at rated IPPM, AEC-Q101 qualification for automotive use, thermal resistance (RθJA = 80 °C/W), and RoHS-compliant HE3 suffix indicating whisker-test class 2 qualification.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 μA reverse leakage at 40 V; during transients exceeding 44.4 V breakdown (VBR min), it avalanches to clamp voltage ≤64.5 V. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for surface-mount automated assembly on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, it supports single-pulse surge handling up to 40 A IFSM (8.3 ms half-sine) and continuous operation from –55 °C to +150 °C junction temperature - validated per J-STD-020 MSL level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum continuous reverse operating voltage before avalanche conduction begins |
| VBR (min/max) | 44.4 V / 49.1 V - guaranteed breakdown range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 64.5 V at 7.8 A - clamping voltage under standardized 10/1000 μs surge; determines protected circuit's max stress level |
| PPPM | 500 W - peak pulse power handling capability; defines energy absorption capacity per transient event |
| TJ max. | +150 °C - maximum junction temperature; sets thermal derating limit for sustained ambient conditions |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient; used to calculate temperature rise under power dissipation |
| AEC-Q101 | Qualified - validated reliability for automotive electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
Pinout & Package
Package: DO-214AC (SMA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability standard. Cathode indicated by band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to lower-potential side of protected line; enables forward conduction only during fault reversal |
| Cathode | Avalanche conduction node | Marked end; connected to higher-potential rail; conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable, repeatable breakdown voltage and long-term reliability under repeated surge stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without moisture-induced damage or delamination |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, critical for automotive long-life modules |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in 12 V systems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power rail exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Uni-directional shunt TVS placed between VIN and GND to clamp surges above 40 V. Use Value: Limits transient voltage to ≤64.5 V during 7.8 A pulses, protecting 45 V-rated DC-DC converters and MCU power pins. | Use Scenario: Analog output line (e.g., 4–20 mA current loop) in factory automation sensor. IC Role / Device Role / Timing Role: Bidirectional-capable but used uni-directionally across signal/GND to suppress ESD and inductive kickback. Use Value: Sub-1 ns response time and <1.0 μA leakage at 40 V preserve signal integrity while enabling ±30 kV HBM ESD immunity. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: -48 V telecom rectifier output feeding base station backplane. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail to absorb positive-going transients from relay switching. Use Value: 500 W PPPM and 64.5 V VC ensure compliance with GR-1089-CORE lightning surge requirements. | Use Scenario: VBUS line in USB 2.0 host port subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Clamping device between VBUS and GND, sized for 40 V standoff to avoid interference with 5.5 V max USB spec. Use Value: AEC-Q101 qualification and JESD201 Class 2 plating support high-reliability consumer product field life >10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40A-E3/5A | Commercial-grade variant; same VWM/VBR/VC/PPPM, but lacks AEC-Q101 qualification and JESD 201 Class 2 whisker testing | Approved for industrial/commercial use only; not certified for automotive under ISO/TS 16949 | Select when automotive qualification is unnecessary and cost sensitivity outweighs long-term reliability validation |
| SMCJ40AHE3/5A | Same electrical specs but in larger DO-214AB (SMC) package; RθJA = 35 °C/W vs. 80 °C/W; IPPM = 20.5 A (vs. 7.8 A) at same VC | Higher surge current handling and better thermal dissipation; requires larger PCB footprint | Choose when system-level surge tests exceed 500 W single-pulse or require >10 A IPPM margin |
Compared with SMA5J40A-E3/5A, the SMA5J40HE3/5A adds automotive-grade process controls and whisker resistance; versus SMCJ40AHE3/5A, it trades lower surge current headroom and higher thermal resistance for space-constrained layouts where DO-214AC footprint is mandatory.
Availability
SMA5J40HE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeds, and consumer USB power protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMA5J40HE3/5A 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, TVS, MOSFETs, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial power systems where rapid clamping and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage range for SMA5J40HE3/5A?
The SMA5J40HE3/5A has a guaranteed breakdown voltage (VBR) range of 44.4 V to 49.1 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots and validates its suitability for 40 V nominal systems where margin above VWM is required. The SMA5J40HE3/5A maintains this specification under TA = 25 °C and conforms to JEDEC test methods.
Is SMA5J40HE3/5A suitable for automotive applications?
Yes, SMA5J40HE3/5A is AEC-Q101 qualified and manufactured with JESD 201 Class 2 whisker-resistant plating, making it approved for automotive powertrain, body, and chassis modules. Its DO-214AC package meets MSL level 1 reflow requirements, and its 150 °C max junction temperature supports under-hood environments. The SMA5J40HE3/5A data sheet explicitly lists AEC-Q101 in Mechanical Data and Thermal Characteristics sections.
What is the maximum clamping voltage of SMA5J40HE3/5A and at what current?
The SMA5J40HE3/5A clamps to a maximum of 64.5 V at 7.8 A peak pulse current (IPPM), tested with a 10/1000 μs waveform. This VC value defines the upper voltage limit imposed on protected circuitry during surge events and is measured under standardized conditions with specified PCB pad layout. The SMA5J40HE3/5A achieves this clamping performance while maintaining low incremental surge resistance.
Does SMA5J40HE3/5A have polarity marking, and how is it identified?
Yes, SMA5J40HE3/5A is a uni-directional TVS diode with cathode polarity marked by a visible band on one end of the DO-214AC (SMA) package body. The banded end connects to the higher-potential side of the circuit (e.g., VIN), while the unmarked end is the anode, tied to ground or lower potential. This marking aligns with JEDEC standards and is confirmed in the "Polarity" section of the Vishay datasheet for SMA5J40HE3/5A.
What is the thermal resistance junction-to-ambient for SMA5J40HE3/5A?
The SMA5J40HE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value is measured under standardized JEDEC conditions and is used to calculate temperature rise during power dissipation. The SMA5J40HE3/5A thermal performance is documented in the Thermal Characteristics table of its official Vishay datasheet (Doc. #88875).
SMA5J40HE3/5A 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMA5J40HE3/5A FAQ
1.How can I place an order for SMA5J40HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40HE3/5A 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 SMA5J40HE3/5A reliable?
The price and inventory of SMA5J40HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40HE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J40HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40HE3/5A?
SMA5J40HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40HE3/5A 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 SMA5J40HE3/5A?
For technical support, including SMA5J40HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40HE3/5A requirements.
6.How does Aetrix verify that SMA5J40HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J40HE3/5A 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 SMA5J40HE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J40HE3/5A?
All SMA5J40HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40HE3/5A, 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 SMA5J40HE3/5A part is unused and in its original packaging.
Return procedure for SMA5J40HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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