My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ45CAHE3_B/I
- Part No.:
- SMBJ45CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CAHE3_B/I.pdf
- Description:
- 600W,45V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,730
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ45CAHE3_B/I 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 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive ECUs to protect MOSFETs and ICs from ESD and inductive switching surges.
For engineers reviewing the SMBJ45CAHE3_B/I datasheet, SMBJ45CAHE3_B/I pinout, SMBJ45CAHE3_B/I application, or SMBJ45CAHE3_B/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, clamping behavior under surge conditions, and direct alternative part comparisons - all aligned to Vishay's 09-Jan-2024 revision of document 88392.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (50.0 V / 55.3 V), ID ≤ 1.0 µA at VWM = 45 V, and TC(VBR) = 0.102 %/°C. Its low incremental surge resistance enables stable clamping during fast transients, while the glass-passivated junction ensures robust reliability under repetitive surge stress.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it achieves RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - critical for automotive-grade power rail protection where long-term surge immunity and solderability per J-STD-002 are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC bias margin for protected circuitry. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on across polarity and temperature. |
| VC @ IPPM | 72.7 V at 8.3 A (10/1000 µs) - Clamped voltage seen by downstream components during worst-case surge; limits stress on 48 V-rated ICs. |
| PPPM | 600 W - Peak transient energy absorption capacity; sustains 10/1000 µs pulses at 0.01% duty cycle without degradation. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage at rated stand-off; prevents parasitic loading on high-impedance sensor or reference lines. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports under-hood automotive placement and industrial ambient conditions. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - both terminals electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche structure - either terminal serves as cathode or anode depending on instantaneous polarity; no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - eliminates need for dual unidirectional devices. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements - ensures reliability over 15-year vehicle lifecycles. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 12 V/24 V rails when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients - preserves timing margins in high-speed CAN or LIN bus receivers. |
| MSL Level 1, 260 °C peak | Supports standard lead-free reflow without moisture sensitivity concerns - eliminates bake-out requirement in production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V supply inputs in engine control units (ECUs) and body control modules (BCMs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers to limit input voltage to safe levels during ISO 7637-2 Pulse 5a events. Use Value: Withstands 600 W surges while clamping to 72.7 V - within safe operating area of 80 V-rated input capacitors and regulators. |
Use Scenario: Shielding analog front-ends of pressure, temperature, and position sensors in factory automation systems from ESD and relay-induced transients. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) shunt device on differential sensor outputs (e.g., 4–20 mA loop or RS-485) to prevent latch-up in precision ADCs. Use Value: 1.0 µA leakage at 45 V ensures minimal offset error in µA-level sensor current paths; bidirectional symmetry avoids signal inversion. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Safeguarding PoE-powered Ethernet switches and base station RF front-ends against lightning-induced surges on DC bias lines. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V phantom power rails, coordinated with primary GDT or MOV stages to distribute energy dissipation. Use Value: 72.7 V clamping voltage aligns with IEEE 802.3bt Class 5/6 PoE+ voltage tolerances - prevents damage to PD controller ICs during surge recovery. |
Use Scenario: Securing AC-DC adapter secondary-side outputs (5 V/9 V/12 V) against user-induced ESD and capacitor discharge events. IC Role / Device Role / Timing Role: Final-stage transient suppressor between rectifier output and USB-C PD controller, minimizing voltage overshoot during hot-plug events. Use Value: Fast response time (<1 ns) and 0.102 %/°C VBR tempco ensure consistent clamping across consumer ambient ranges (0–70 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CAHM3_B/I | Halogen-free variant with identical VWM, VBR, VC, and PPPM ratings; same AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy (e.g., VW 80101). | Direct drop-in replacement if halogen-free material content is required; otherwise functionally interchangeable. |
| SMCJ45CAHE3_A/I | Larger SMC (DO-214AB) package with higher 1500 W PPPM rating; same 45 V VWM and bidirectional architecture. | Used where higher surge energy handling is needed (e.g., industrial motor drives), but requires PCB layout change due to larger footprint. | Choose when system-level surge testing exceeds 600 W - not pin-compatible; requires redesign of pad layout and thermal relief. |
Compared with SMBJ45CAHE3_B/I, SMBJ45CAHM3_B/I offers identical electrical performance with halogen-free construction, while SMCJ45CAHE3_A/I provides 2.5× higher surge power at the cost of larger board area and non-interchangeable packaging.
Availability
SMBJ45CAHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ45CAHE3_B/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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMBJ series targets high-reliability transient suppression in space-constrained applications - engineered for rapid response, low clamping, and robust surge endurance in automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ45CAHE3_B/I at its rated peak pulse current?
The SMBJ45CAHE3_B/I has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and reflects the actual voltage imposed on protected circuitry during worst-case transient events. The SMBJ45CAHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ45CAHE3_B/I qualified for automotive applications?
Yes, SMBJ45CAHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in revision 09-Jan-2024 of datasheet 88392. This qualification covers stress tests including HTGB, HTRB, TCT, and surge endurance - making SMBJ45CAHE3_B/I suitable for under-hood and chassis-mounted automotive electronics where long-term reliability is critical.
How does the bidirectional nature of SMBJ45CAHE3_B/I affect its use in circuit design?
The bidirectional architecture of SMBJ45CAHE3_B/I allows it to suppress transients of either polarity without requiring orientation during placement - ideal for AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating power domains. Unlike unidirectional TVS diodes, SMBJ45CAHE3_B/I has no cathode band marking and exhibits matched VBR and VC characteristics in both directions, simplifying layout and reducing BOM count.
What is the thermal resistance of SMBJ45CAHE3_B/I, and how does it impact PCB layout?
SMBJ45CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must ensure adequate copper area and avoid thermal isolation. The SMBJ45CAHE3_B/I datasheet specifies pad dimensions and recommends thermal vias for high-reliability applications.
Does SMBJ45CAHE3_B/I meet RoHS and halogen-free requirements?
SMBJ45CAHE3_B/I is RoHS-compliant per EU Directive 2011/65/EU, as indicated by the "HE3" suffix. It is not halogen-free - that designation applies only to "HM3" variants (e.g., SMBJ45CAHM3_B/I). The SMBJ45CAHE3_B/I uses standard brominated flame-retardant molding compound meeting UL 94 V-0, and its matte tin-plated leads comply with J-STD-002 solderability standards.
SMBJ45CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ45CAHE3_B/I FAQ
1.How can I place an order for SMBJ45CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CAHE3_B/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 SMBJ45CAHE3_B/I reliable?
The price and inventory of SMBJ45CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ45CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CAHE3_B/I?
SMBJ45CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CAHE3_B/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 SMBJ45CAHE3_B/I?
For technical support, including SMBJ45CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ45CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ45CAHE3_B/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 SMBJ45CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ45CAHE3_B/I?
All SMBJ45CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CAHE3_B/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 SMBJ45CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ45CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CAHE3_B/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
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 …
