My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J40CA-M3/61
- Part No.:
- SMA5J40CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CA-M3/61.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,928
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J40CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 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 (10/1000 µs waveform). It protects signal lines and power rails in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SMA5J40CA-M3/61 datasheet, SMA5J40CA-M3/61 pinout, SMA5J40CA-M3/61 application, or SMA5J40CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling effective suppression of sub-microsecond transients induced by relay switching or load dump events.
The SMA5J40CA-M3/61 delivers 500 W peak pulse power under standardized 10/1000 µs waveform conditions when mounted per recommended pad layout. Thermal resistance is characterized at RθJA = 80 °C/W and RθJL = 25 °C/W, supporting reliable operation up to 150 °C junction temperature in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 44.4 V / 49.1 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 64.5 V - Clamping voltage at 7.8 A peak pulse current; limits transient overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); determines survivability against high-energy surges like ISO 7637-2 Pulse 5a. |
| IPPM | 7.8 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify margin versus system surge requirements. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with standard reflow profiles (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage above ±44.4 V in either direction without polarity dependency. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; thermal path relies on copper pad area (0.2" × 0.2") for RθJA = 80 °C/W rating. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without external polarity management. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial OEMs; avoids brominated flame retardants in molding compound. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V or 5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow; eliminates bake requirements and simplifies SMT line logistics. |
| Glass-passivated junction | Ensures stable leakage current (<1.0 µA at 40 V) and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed between signal line and ground to clamp transients up to ±64.5 V while maintaining 40 V operating window. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends and op-amp buffers by limiting overvoltage to safe levels during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback generated by solenoid valve switching. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminal and common rail to absorb 500 W surge energy without degradation. Use Value: Eliminates need for external series resistors or RC snubbers, reducing BOM count and board space while sustaining >100,000 surge cycles per channel. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceiver pins in base station remote units subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping device installed at connector entry point to shunt transient energy before it reaches PHY layer ICs. Use Value: Maintains signal integrity up to 10 Mbps by limiting capacitance to <100 pF at zero bias, avoiding data corruption or timing jitter. | Use Scenario: Protecting gate drivers in smart home washing machine motor inverters from voltage spikes caused by brush commutation noise. IC Role / Device Role / Timing Role: Transient suppressor placed across half-bridge MOSFET source-drain paths to prevent false triggering or avalanche failure. Use Value: Extends MOSFET lifetime by reducing repetitive stress on silicon die, verified under 8.3 ms half-sine surge testing per JEDEC standards. |
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-E3/61 | RoHS-compliant but not halogen-free; same electrical specs and SMA package. | Approved for commercial-grade industrial use where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 qualification is unnecessary. |
| SMA5J40CAHM3_A/H | AEC-Q101 qualified variant with identical clamping and power ratings; uses HM3 halogen-free, automotive-grade molding compound. | Required for under-hood automotive modules needing formal qualification per JESD22-A108 and JESD22-A110. | Choose for automotive OEM designs requiring documented qualification evidence and extended temperature validation. |
Compared with SMA5J40CA-M3/61, the E3/61 offers identical protection performance at lower cost for non-automotive applications, while the HM3_A/H adds formal AEC-Q101 validation for mission-critical vehicle subsystems-neither is pin-compatible with unqualified variants due to differing qualification status and material traceability.
Availability
SMA5J40CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interface circuits requiring stable component supply with halogen-free compliance and SMT placement support.
Supply support for SMA5J40CA-M3/61 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 devices, and optoelectronics with emphasis on high-reliability power and protection solutions.
The SMA5J series was designed specifically for high-power-density transient suppression in space-constrained automotive and industrial applications, balancing robust surge handling with surface-mount manufacturability and environmental compliance.
FAQ
What is the clamping voltage of the SMA5J40CA-M3/61 under standard test conditions?
The SMA5J40CA-M3/61 has a maximum clamping voltage (VC) of 64.5 V at 7.8 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. The SMA5J40CA-M3/61 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is the SMA5J40CA-M3/61 suitable for automotive applications?
The SMA5J40CA-M3/61 is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the SMA5J40CAHM3_A/H variant, which carries formal AEC-Q101 qualification. The SMA5J40CA-M3/61 may be used in non-safety-critical automotive subsystems where qualification is not mandated, but design validation remains the customer's responsibility.
How does the bidirectional nature of the SMA5J40CA-M3/61 affect its circuit implementation?
The SMA5J40CA-M3/61 has no polarity marking and conducts symmetrically in both directions, making it ideal for protecting AC signals, differential buses (e.g., CAN, RS-485), or floating nodes. Unlike unidirectional TVS diodes, it requires no orientation check during placement and eliminates risk of reverse installation error in high-volume SMT assembly of the SMA5J40CA-M3/61.
What is the thermal resistance profile of the SMA5J40CA-M3/61?
The SMA5J40CA-M3/61 exhibits a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W when mounted per Vishay's recommended pad layout. These values assume 0.2" × 0.2" copper pads per terminal and define the thermal derating envelope for sustained surge duty cycles in the SMA5J40CA-M3/61.
Does the SMA5J40CA-M3/61 require special handling or baking prior to reflow soldering?
No. The SMA5J40CA-M3/61 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be placed directly into reflow without baking or dry pack storage. Its maximum peak reflow temperature is 260 °C, fully compatible with standard lead-free soldering profiles used for the SMA5J40CA-M3/61.
SMA5J40CA-M3/61 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J40CA-M3/61 FAQ
1.How can I place an order for SMA5J40CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CA-M3/61 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 SMA5J40CA-M3/61 reliable?
The price and inventory of SMA5J40CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CA-M3/61?
SMA5J40CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CA-M3/61 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 SMA5J40CA-M3/61?
For technical support, including SMA5J40CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CA-M3/61 requirements.
6.How does Aetrix verify that SMA5J40CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40CA-M3/61 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 SMA5J40CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40CA-M3/61?
All SMA5J40CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CA-M3/61, 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 SMA5J40CA-M3/61 part is unused and in its original packaging.
Return procedure for SMA5J40CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J40CA-M3/61 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
