My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J40CAHE3_A/I
- Part No.:
- SMA5J40CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CAHE3_A/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,115
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J40CAHE3_A/I 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), 44.4–49.1 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), clamping voltage of 64.5 V at 7.8 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J40CAHE3_A/I datasheet, SMA5J40CAHE3_A/I pinout, SMA5J40CAHE3_A/I application, or SMA5J40CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, MSL Level 1 solderability, and compatibility with 13" tape-and-reel automated assembly for automotive ECUs and industrial power supplies.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to limit reverse voltage across protected circuits. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with no polarity marking required on the SMA package.
Thermal performance is defined by RθJA = 80 °C/W and RθJL = 25 °C/W, enabling reliable operation up to TJ = 150 °C. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 64.5 V at 7.8 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD; suffix HE3 denotes qualification. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard SMT reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no cathode band marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; surge current flows bidirectionally through the same avalanche junction. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad mounting per 5.0 mm × 5.0 mm layout required for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions eliminates need for polarity-aware layout; simplifies PCB routing for AC-coupled lines. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 20.4 V) versus competing TVS devices, reducing voltage overshoot on protected nodes. |
| MSL Level 1 rating | Allows unlimited floor life and peak reflow up to 260 °C without baking; supports high-throughput manufacturing. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, TC, and uHAST; required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Improves long-term stability and moisture resistance over epoxy-passivated alternatives; critical for harsh-environment deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and ground, activated within <1 ns of overvoltage event. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended signal lines, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity below 1 pF junction capacitance at VWM, avoiding bandwidth degradation in 100 kHz sensor channels. |
| Telecom DC Power Input Protection | Consumer USB-C Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC converters, rated for 500 W 10/1000 µs pulses. Use Value: Withstands repeated 100 A surge events when mounted on 5 mm × 5 mm copper pads, extending system field life. |
Use Scenario: Adding robustness to USB-C receptacles against hot-plug transients and accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS and GND, responding faster than internal MOSFET overvoltage protection. Use Value: Clamps 20 V misapplication to ≤64.5 V within nanoseconds, allowing time for host-side fault shutdown without port damage. |
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; differs only in molding compound chemistry. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct material substitution if halogen-free requirement applies; same thermal and surge performance as SMA5J40CAHE3_A/I. |
| SMCJ40CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher PPPM (1500 W); RθJA = 35 °C/W vs. 80 °C/W. | Used where higher surge energy absorption or lower thermal resistance is required; occupies ~2.5× PCB area. | Select when system-level surge testing exceeds 500 W; not drop-in due to different footprint and thermal pad requirements. |
Compared with SMA5J40CAHE3_A/I, SMA5J40CA-M3/5A offers identical protection performance with halogen-free materials, while SMCJ40CAHE3_A/I delivers triple the pulse power at the cost of larger board space and different thermal management-making SMA5J40CAHE3_A/I optimal for space-constrained automotive modules requiring AEC-Q101 compliance.
Availability
SMA5J40CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with full AEC-Q101 traceability and 13" tape-and-reel delivery.
Supply support for SMA5J40CAHE3_A/I 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 for high-power-density transient suppression in space-constrained automotive and industrial systems, balancing low profile, AEC-Q101 compliance, and robust 500 W surge handling in the SMA package.
FAQ
What is the clamping voltage of the SMA5J40CAHE3_A/I under a 10/1000 µs surge?
The SMA5J40CAHE3_A/I clamps to a maximum of 64.5 V when subjected to its rated peak pulse current of 7.8 A (10/1000 µs waveform). This value is measured at the device terminals under standardized test conditions with proper PCB thermal pads, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMA5J40CAHE3_A/I suitable for automotive applications?
Yes, SMA5J40CAHE3_A/I is AEC-Q101 qualified and explicitly intended for automotive use. Its HE3 suffix confirms qualification to the full AEC-Q101 stress test suite, including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-making it appropriate for engine control, body electronics, and ADAS subsystems.
Does SMA5J40CAHE3_A/I have polarity markings on the package?
No, SMA5J40CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking such as a cathode band. The SMA (DO-214AC) package is symmetric, and both terminals perform identically regardless of applied voltage polarity-simplifying placement and eliminating orientation errors during automated assembly.
What is the maximum operating junction temperature for SMA5J40CAHE3_A/I?
The maximum operating junction temperature for SMA5J40CAHE3_A/I is +150 °C, as specified in the Vishay datasheet. This rating allows reliable operation in under-hood automotive environments and high-ambient industrial settings, provided the thermal design meets the recommended 5.0 mm × 5.0 mm copper pad layout per terminal.
How does the SMA5J40CAHE3_A/I differ from unidirectional variants like SMA5J40AHE3_A/I?
SMA5J40CAHE3_A/I is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas SMA5J40AHE3_A/I is unidirectional with a cathode band and conducts only in reverse bias. The "CA" suffix explicitly denotes bidirectional functionality, making SMA5J40CAHE3_A/I suitable for AC lines, differential signals, or any application requiring polarity-agnostic protection.
SMA5J40CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/I FAQ
1.How can I place an order for SMA5J40CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CAHE3_A/I 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_A/I reliable?
The price and inventory of SMA5J40CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J40CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CAHE3_A/I?
SMA5J40CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CAHE3_A/I 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_A/I?
For technical support, including SMA5J40CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CAHE3_A/I requirements.
6.How does Aetrix verify that SMA5J40CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J40CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J40CAHE3_A/I?
All SMA5J40CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for SMA5J40CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J40CAHE3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
