My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ40CAHE3/5B
;;2.jpg)
- Part No.:
- SMBJ40CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40CAHE3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ40CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ40CAHE3/5B datasheet, SMBJ40CAHE3/5B pinout, SMBJ40CAHE3/5B application, or SMBJ40CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable reverse leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and inductive switching spikes.
The SMBJ40CAHE3/5B is rated for repetitive surge duty cycle of 0.01 % and derates linearly above 25 °C ambient per Figure 2. Junction temperature range spans −55 °C to +150 °C, and it meets MSL Level 1 per J-STD-020 with peak reflow temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 44.4 V / 49.1 V at 1.0 mA - Confirmed breakdown voltage window ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity; enables robust protection against lightning-induced surges and relay coil kickback. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs thermal design margin at 5.0 W steady-state dissipation. |
| TJ max | +150 °C - Maximum allowable junction temperature; supports operation in high-temperature industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated terminals, UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | AC terminal (bidirectional) | Both terminals function identically; no cathode band marking - symmetric conduction path for positive/negative transients. |
| Anode (Cathode) | AC terminal (bidirectional) | Electrically interchangeable with opposite terminal; enables placement flexibility on PCB without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in motor drives and industrial I/O without degradation over rated duty cycle. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive subsystems requiring extended temperature operation and long-term reliability under vibration and thermal stress. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow soldering without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures low leakage (<1.0 µA at VWM) and stable VBR over lifetime, critical for low-power sensor front-ends. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET source-drain or op-amp input pins to limit transient overshoot. Use Value: Limits peak voltage to ≤64.5 V during 9.3 A surges, preventing latch-up or oxide breakdown in 40 V-rated control ICs. |
Use Scenario: Surge suppression on LIN bus lines and power inputs of door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN signal and ground, and across VBAT and ground rails. Use Value: Withstands 600 W pulses while maintaining <1.0 µA leakage at 40 V, preserving bus integrity and low-power sleep mode current budgets. |
| Industrial Sensor Signal Conditioning | Telecom Power Supply Inputs |
|
Use Scenario: Guarding analog outputs of pressure/temperature sensors connected to PLC analog input cards via long cables. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) shunted across differential signal pair to suppress ESD and cable-coupled noise. Use Value: Clamps transients within 1 ns while adding negligible loading to 0–10 V or 4–20 mA signal paths due to minimal junction capacitance. |
Use Scenario: Primary-stage transient protection on 48 V telecom rectifier outputs feeding downstream DC-DC converters. IC Role / Device Role / Timing Role: Bidirectional TVS placed across output rails to absorb lightning-induced surges per IEC 61000-4-5 Level 4. Use Value: Delivers 64.5 V clamping at 9.3 A with 100 °C/W thermal resistance, enabling compact layout without heatsinking under intermittent surge conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-M3/5B | Halogen-free, RoHS-compliant, commercial-grade variant without AEC-Q101 qualification. | Lacks automotive reliability validation; suitable for non-automotive industrial use where cost optimization is prioritized. | Select when AEC-Q101 is not required and halogen-free compliance is mandated by environmental policy. |
| SMCJ40CAHE3/5B | Same electrical specs but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and lower RθJA (50 °C/W). | Requires larger PCB footprint; preferred where higher surge energy or improved thermal performance is needed. | Choose when system-level surge testing exceeds 600 W or ambient temperatures exceed 85 °C with sustained power dissipation. |
Compared with SMBJ40CA-M3/5B, the SMBJ40CAHE3/5B adds automotive-grade qualification and identical RoHS compliance; compared with SMCJ40CAHE3/5B, it trades surge margin and thermal headroom for space-constrained layouts where 600 W protection suffices.
Availability
SMBJ40CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with AEC-Q101 assurance and tape-and-reel delivery.
Supply support for SMBJ40CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for robust transient suppression in space-constrained, high-reliability applications across automotive, industrial, and telecom infrastructure, balancing power density, thermal performance, and qualification rigor.
FAQ
What does the "CA" suffix indicate in SMBJ40CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning the SMBJ40CAHE3/5B provides symmetrical clamping for both positive- and negative-polarity transients without polarity sensitivity. This eliminates the need for orientation-aware placement and supports AC-coupled or floating signal line protection, unlike unidirectional variants (e.g., SMBJ40A) that require correct cathode alignment.
Is SMBJ40CAHE3/5B suitable for automotive applications?
Yes, SMBJ40CAHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD immunity, making it appropriate for under-hood and cabin electronics such as body control modules, lighting drivers, and sensor interfaces where automotive-grade reliability is mandatory.
What is the maximum clamping voltage of SMBJ40CAHE3/5B under surge conditions?
The SMBJ40CAHE3/5B has a maximum clamping voltage (VC) of 64.5 V at 9.3 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is measured per ANSI/IEEE C62.35 standards.
How does the SMB (DO-214AA) package of SMBJ40CAHE3/5B affect thermal performance?
The SMB (DO-214AA) package of SMBJ40CAHE3/5B delivers a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This allows safe operation at 5.0 W steady-state dissipation up to +50 °C ambient, supporting compact designs where board area is constrained but thermal management remains viable.
Does SMBJ40CAHE3/5B require orientation during PCB assembly?
No, SMBJ40CAHE3/5B does not require specific orientation during PCB assembly because it is a bidirectional device with no polarity marking. Both terminals are functionally identical, enabling flexible placement on automated SMT lines without vision-based orientation verification or manual correction steps - reducing assembly complexity and defect risk.
SMBJ40CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 9.3A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ40CAHE3/5B FAQ
1.How can I place an order for SMBJ40CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40CAHE3/5B 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 SMBJ40CAHE3/5B reliable?
The price and inventory of SMBJ40CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ40CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40CAHE3/5B?
SMBJ40CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40CAHE3/5B 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 SMBJ40CAHE3/5B?
For technical support, including SMBJ40CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ40CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ40CAHE3/5B 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 SMBJ40CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ40CAHE3/5B?
All SMBJ40CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40CAHE3/5B, 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 SMBJ40CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ40CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40CAHE3/5B 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 …
