My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J40CAHE3/61
- Part No.:
- SMA5J40CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J40CAHE3/61.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,841
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J40CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 40 V standoff voltage (VWM), 49.1 V max breakdown (VBR), 500 W peak pulse power (10/1000 µs), and 7.8 A clamping current at 64.5 V VC. 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 SMA5J40CAHE3/61 datasheet, SMA5J40CAHE3/61 pinout, SMA5J40CAHE3/61 application, or SMA5J40CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients: when reverse voltage exceeds VBR (44.4–49.1 V), it avalanches to limit downstream voltage to ≤64.5 V at 7.8 A IPPM. Its bidirectional symmetry ensures identical clamping in both polarities, eliminating polarity marking requirements.
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 MSL Level 1 moisture sensitivity rating support lead-free reflow at 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 64.5 V - Clamped voltage at 7.8 A peak pulse current (10/1000 µs), limiting stress on protected ICs |
| PPPM | 500 W - Peak transient energy absorption capacity under standard waveform, critical for surge immunity |
| TJ max | 150 °C - Maximum junction temperature, supporting under-hood automotive and high-ambient industrial use |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height for compact PCB layout |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements, including temperature cycling and HTRB |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 whisker resistance (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically in either polarity - no cathode band; bidirectional clamping requires no orientation during placement |
| Case (body) | Thermal and mechanical interface | Plastic-molded body meets UL 94 V-0; thermal path to PCB copper via terminal leads, not case surface |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic interfaces |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without baking, reducing manufacturing complexity and cost |
| Glass-passivated junction | Enhances long-term stability and leakage performance over temperature and lifetime vs. epoxy-passivated alternatives |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in vehicle cabin sensors exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp ±64.5 V transients while preserving signal integrity. Use Value: Prevents latch-up or permanent damage to transceivers during 500 W surges, maintaining communication uptime in harsh EMI environments. | Use Scenario: Shielding analog input channels (0–10 V, 4–20 mA) in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between signal line and ground to absorb inductive kickback from solenoid valves and motor drives. Use Value: Maintains measurement accuracy by limiting transient-induced offset errors and preventing ADC saturation or microcontroller reset events. |
| Consumer Power Adapter Input | Telecom Ethernet Port Protection |
Use Scenario: Safeguarding primary-side rectifier and controller ICs in universal-input AC/DC adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: High-power TVS placed across bridge rectifier output to clamp 10/1000 µs line-to-line transients before bulk capacitor filtering. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (2 kV) without requiring oversized MOVs or additional series impedance. | Use Scenario: Securing 10/100/1000BASE-T PHY interfaces in enterprise switches against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS array (per pair) suppressing ±15 kV contact ESD per IEC 61000-4-2 while minimizing signal distortion. Use Value: Achieves <1 pF junction capacitance at VWM, preserving Ethernet signal rise time and return loss above 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J40CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects) | Choose SMA5J40CA-M3/61 when halogen-free bill-of-materials is required; otherwise SMA5J40CAHE3/61 offers same performance with commercial-grade traceability |
| SMA6J40CAHE3/61 | 600 W PPPM rating (vs. 500 W), higher IPPM (8.7 A), same VWM/VBR/VC, identical package and AEC-Q101 status | Preferred for systems requiring higher surge margin (e.g., 12 V battery rail in start-stop vehicles) without layout change | Select SMA6J40CAHE3/61 when design margins demand >500 W transient handling; verify thermal derating at elevated ambient temperatures |
Compared with SMA5J40CA-M3/61 and SMA6J40CAHE3/61, the SMA5J40CAHE3/61 provides optimal cost-performance balance for AEC-Q101-compliant 40 V systems where 500 W surge immunity suffices and halogen-free content is not mandated.
Availability
SMA5J40CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom Ethernet port protection requiring stable component supply, AEC-Q101 validation, and RoHS-compliant sourcing.
Supply support for SMA5J40CAHE3/61 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-qualified components.
The SMA5JxxA/CA family delivers high-power-density transient suppression in compact surface-mount packages, targeting automotive, industrial, and telecom systems where space-constrained board layouts demand robust ESD and surge immunity.
FAQ
What is the clamping voltage of the SMA5J40CAHE3/61 under a 10/1000 µs surge?
The SMA5J40CAHE3/61 clamps to a maximum of 64.5 V when subjected to its rated peak pulse current of 7.8 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads per terminal) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SMA5J40CAHE3/61 suitable for automotive applications?
Yes, the SMA5J40CAHE3/61 is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers temperature cycling, high-temperature reverse bias, and humidity testing per automotive reliability standards, making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where sustained operation up to 150 °C junction temperature is required.
Does the SMA5J40CAHE3/61 have polarity markings?
No, the SMA5J40CAHE3/61 is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical construction allows installation in either orientation on the PCB, simplifying automated placement and eliminating risk of reverse installation during assembly.
What is the thermal resistance from junction to ambient for the SMA5J40CAHE3/61?
The SMA5J40CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is used to calculate steady-state temperature rise under DC leakage or repetitive surge conditions.
How does the SMA5J40CAHE3/61 differ from unidirectional variants like SMA5J40AHE3/61?
The SMA5J40CAHE3/61 is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas SMA5J40AHE3/61 is unidirectional, features a cathode band, and conducts only in reverse bias. Electrically, SMA5J40AHE3/61 supports 40 A IFSM forward surge current - a capability absent in the CA version - but cannot protect AC or floating signals without external circuitry.
SMA5J40CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMA5J40CAHE3/61 FAQ
1.How can I place an order for SMA5J40CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J40CAHE3/61 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 SMA5J40CAHE3/61 reliable?
The price and inventory of SMA5J40CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J40CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J40CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J40CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J40CAHE3/61?
SMA5J40CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J40CAHE3/61 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 SMA5J40CAHE3/61?
For technical support, including SMA5J40CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J40CAHE3/61 requirements.
6.How does Aetrix verify that SMA5J40CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J40CAHE3/61 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 SMA5J40CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J40CAHE3/61?
All SMA5J40CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J40CAHE3/61, 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 SMA5J40CAHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J40CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J40CAHE3/61 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 …
