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Vishay General Semiconductor - Diodes Division SMA5J40CAHE3/5A
- Part No.:
- SMA5J40CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CAHE3/5A.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,210
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Product details
Overview
SMA5J40CAHE3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 40 V stand-off voltage (VWM), 49.1 V maximum breakdown voltage (VBR), 64.5 V clamping voltage at 7.8 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J40CAHE3/5A datasheet, SMA5J40CAHE3/5A pinout, SMA5J40CAHE3/5A application, or SMA5J40CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant HE3 suffix, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ps), critical for protecting sensitive MOSFET gates and microcontroller I/O pins.
The device is rated for 150 °C maximum junction temperature and exhibits low incremental surge resistance, delivering consistent clamping behavior under repetitive 10/1000 µs surges. Thermal resistance is 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for 36–40 V nominal systems. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 64.5 V - Clamping voltage measured at 7.8 A peak pulse current; limits downstream voltage stress during surge events. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity compliance. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off voltage; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with standard reflow profiles and J-STD-020 MSL level 1. |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, no polarity marking for bidirectional configuration, UL 94 V-0 rated, compliant with JESD 22-B102 solderability and JESD 201 class 2 whisker testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal serves as anode or cathode depending on transient polarity; enables single-device protection of AC or differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - required for engine control, ADAS sensor, and body electronics. |
| Glass passivated junction | Stable electrical characteristics over lifetime and environmental stress; eliminates parameter drift caused by moisture ingress or surface contamination. |
| Low profile SMA package | Height ≤ 2.29 mm - enables compact PCB layouts in space-constrained modules such as camera ECUs and motor drivers. |
| MSL level 1 (260 °C peak) | Compatible with standard lead-free reflow without baking or special handling - reduces manufacturing overhead and yield risk. |
| 500 W peak pulse power | Withstands ≥100 surges at full rating when derated per Fig. 2 - supports long-term field reliability in industrial automation gateways. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing energy before it reaches protected ICs. Use Value: Maintains signal integrity during 12 V/24 V system transients up to 500 W, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Fast-response shunt protector across input terminals, diverting surge current away from optocoupler or MCU GPIO pins. Use Value: Limits clamped voltage to 64.5 V, ensuring compatibility with 24 V DC-rated input circuitry while surviving repeated 1 kV/500 A surges. |
| Telecom Power Line Protection | Consumer Device USB Port Protection |
Use Scenario: Secondary surge suppression on 48 V PoE-powered equipment front-ends, downstream of primary GDT or MOV stages. IC Role / Device Role / Timing Role: Precision clamping device with tight VBR tolerance, refining voltage limiting after coarse-stage suppression. Use Value: Reduces residual transient overshoot to <65 V, protecting Ethernet PHYs and DC-DC controllers rated for 60 V absolute maximum. |
Use Scenario: Overvoltage protection on VBUS and D+/D− lines of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector, suppressing ESD and cable-induced transients. Use Value: Delivers sub-1 µA leakage at 40 V, avoiding battery drain, while clamping 8 kV contact ESD to <65 V per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMA package and thermal performance. | Preferred where halogen-free material compliance is mandated by OEM or regional environmental regulations (e.g., EU automotive Tier 1). | Select SMA5J40CA-M3/5A when halogen-free content is contractually required; otherwise SMA5J40CAHE3/5A offers standard RoHS compliance with broader distribution. |
| SMCJ40CAHE3/5A | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher thermal mass yields lower RθJA (35 °C/W vs. 80 °C/W) and higher IPPM (12.3 A vs. 7.8 A). | Better suited for high-repetition surge environments (e.g., factory floor motor drives) where sustained power dissipation matters more than board area. | Choose SMCJ40CAHE3/5A only if PCB layout allows larger footprint and thermal design requires >500 W average surge handling; SMA5J40CAHE3/5A remains optimal for space-constrained AEC-Q101 designs. |
Compared with SMA5J40CA-M3/5A, the SMA5J40CAHE3/5A differs only in material composition (non-halogen-free), while SMCJ40CAHE3/5A trades package size for enhanced thermal and surge current capability - making SMA5J40CAHE3/5A the preferred choice for cost-sensitive, space-limited automotive and industrial SMT applications requiring AEC-Q101 validation.
Availability
SMA5J40CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supply front-ends requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant sourcing.
Supply support for SMA5J40CAHE3/5A 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, efficiency, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, fast response, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the SMA5J40CAHE3/5A at its rated peak pulse current?
The SMA5J40CAHE3/5A has a maximum clamping voltage (VC) of 64.5 V when subjected to its specified peak pulse current (IPPM) of 7.8 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components see no more than 64.5 V during surge events - critical for protecting 48 V system interfaces and 60 V-rated ICs. The SMA5J40CAHE3/5A maintains this clamping performance across its full operating temperature range.
Is the SMA5J40CAHE3/5A suitable for automotive applications?
Yes, the SMA5J40CAHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and automotive-grade reliability. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock testing. The SMA5J40CAHE3/5A is deployed in engine control units, ADAS camera modules, and body electronics where protection against load dump and ISO 7637-2 transients is essential.
What does the "CA" suffix mean in SMA5J40CAHE3/5A?
The "CA" suffix in SMA5J40CAHE3/5A denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMA5J40A), the SMA5J40CAHE3/5A has no polarity marking and functions identically regardless of voltage polarity applied across its terminals, making it ideal for AC-coupled lines, differential buses, and floating grounds.
How does the SMA5J40CAHE3/5A differ from the SMA5J40AHE3/5A?
The SMA5J40CAHE3/5A is bidirectional, while the SMA5J40AHE3/5A is unidirectional with a cathode band marking. Electrically, the SMA5J40CAHE3/5A clamps in both directions with identical VBR and VC specs, whereas the SMA5J40AHE3/5A only clamps reverse-biased transients and conducts forward current like a standard diode. The SMA5J40CAHE3/5A eliminates need for polarity-aware layout and supports AC signal line protection where directionality is undefined.
What is the maximum junction temperature rating for the SMA5J40CAHE3/5A?
The SMA5J40CAHE3/5A has a maximum junction temperature (TJ max.) of +150 °C, validated per AEC-Q101 stress testing. This rating allows operation in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating curves in the datasheet (Fig. 2) define allowable peak pulse power reduction above 25 °C ambient, ensuring safe thermal margins when mounted on 5.0 mm × 5.0 mm copper pads per recommended layout.
SMA5J40CAHE3/5A 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):
- 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)
SMA5J40CAHE3/5A FAQ
1.How can I place an order for SMA5J40CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CAHE3/5A 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 SMA5J40CAHE3/5A reliable?
The price and inventory of SMA5J40CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J40CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CAHE3/5A?
SMA5J40CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CAHE3/5A 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 SMA5J40CAHE3/5A?
For technical support, including SMA5J40CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J40CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J40CAHE3/5A 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 SMA5J40CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J40CAHE3/5A?
All SMA5J40CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CAHE3/5A, 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 SMA5J40CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J40CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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