My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ45D-M3/H
;;2.jpg)
- Part No.:
- SMBJ45D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45D-M3/H.pdf
- Description:
- TVS DIODE 45VWM 71.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,391
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ45D-M3/H from Vishay General Semiconductor is a unidirectional 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), 50.8–54.5 V breakdown voltage (VBR) at 1 mA, 71.6 V maximum clamping voltage (VC) at 8.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ45D-M3/H datasheet, SMBJ45D-M3/H pinout, SMBJ45D-M3/H application, or SMBJ45D-M3/H equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
This TVS diode operates as a voltage-clamping protection device, triggered when reverse voltage exceeds its breakdown threshold. Its silicon avalanche structure enables sub-nanosecond response time and low dynamic impedance, ensuring effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The SMBJ45D-M3/H is rated for junction temperatures from –55 °C to +150 °C, with thermal resistance RθJA = 125 °C/W (on minimum pad layout) and RθJM = 20 °C/W. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards for telecom and industrial equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 48 V DC systems. |
| VBR min/max | 50.8 V / 54.5 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 71.6 V at 8.4 A - clamping voltage during 10/1000 μs surge; limits stress on downstream 5 V or 3.3 V logic rails. |
| PPPM | 600 W - peak pulse power handling capability under standard 10/1000 μs waveform at 0.01 % duty cycle. |
| ID @ VWM | <0.5 μA - ultra-low reverse leakage preserves efficiency in battery-powered or high-impedance sensing circuits. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length; optimized for automated placement. |
| Polarity | Unidirectional - cathode indicated by band; blocks forward current and clamps reverse transients only. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards; M3 suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during forward bias but not relevant in normal TVS operation. |
| Cathode (banded end) | Reverse conduction / clamping terminal | Connected to protected line (e.g., 48 V rail); avalanche conduction initiates here when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without derating margin inflation. |
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges in industrial control inputs. |
| MSL Level 1 (260 °C peak reflow) | Allows single-pass lead-free reflow assembly without preconditioning or baking requirements. |
| <0.5 μA ID at VWM | Minimizes standby power loss in always-on monitoring circuits and extends battery life in portable sensors. |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and data line protection without additional safety certification effort. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) Supply Rail |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and ground to limit transient overshoot below MOSFET drain-source breakdown. Use Value: Clamps 600 W surges to ≤71.6 V, preventing damage to upstream rectifier diodes and downstream DC-DC controllers. |
Use Scenario: 12 V supply line feeding microcontroller and CAN transceiver in BCM, subject to ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VBAT rail, coordinated with fuse and LC filter for fast-acting energy diversion. Use Value: Sub-ns response captures edge of 50 ns rise-time pulses; low clamping voltage preserves 12 V rail integrity for 5 V LDO input. |
| Telecom Ethernet Port Surge Protection | Industrial Sensor Signal Line Protection |
|
Use Scenario: Secondary protection on PoE-powered Ethernet PHY interface, downstream of gas discharge tube (GDT) primary stage. IC Role / Device Role / Timing Role: Fast-response secondary clamp limiting residual voltage after GDT fires; placed on each data pair (MDI/MDIX). Use Value: 71.6 V VC ensures PHY I/O pins remain within absolute maximum ratings during combined lightning + GDT follow-on current events. |
Use Scenario: 4–20 mA current loop transmitter output connected to field wiring in hazardous area instrumentation. IC Role / Device Role / Timing Role: Unidirectional TVS on loop output (V+ side), referenced to local ground, guarding analog front-end op-amps and ADC inputs. Use Value: Low leakage (<0.5 μA) avoids injection error into precision 4–20 mA calibration; SMB footprint fits dense PCB layouts near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A-M3/H | Bidirectional variant; symmetrical VBR (50.8–54.5 V) in both polarities; no polarity marking band. | Required where AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN bus) need protection without polarity constraints. | Select SMBJ45A-M3/H only if bidirectional clamping is explicitly required; SMBJ45D-M3/H offers lower cost and simpler layout for DC rails. |
| SMCJ45A | Larger SMC (DO-214AB) package; same electrical specs but higher thermal mass (RθJA = 60 °C/W) and 1500 W PPPM rating. | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) where board space allows larger footprint. | Choose SMCJ45A only when 600 W is insufficient and PCB layout accommodates 7.11 mm × 6.22 mm SMC outline; SMBJ45D-M3/H optimizes space-constrained designs. |
Compared with SMBJ45A-M3/H and SMCJ45A, the SMBJ45D-M3/H provides optimal balance of compact SMB footprint, precise unidirectional clamping, and verified 600 W surge handling - making it ideal for space-limited 48 V DC input stages where polarity is fixed and energy levels are moderate.
Availability
SMBJ45D-M3/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom Ethernet ports, and industrial sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ45D-M3/H 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, precision, and industrial-grade qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and telecom infrastructure where consistent clamping performance and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ45D-M3/H at its rated peak pulse current?
The SMBJ45D-M3/H has a maximum clamping voltage (VC) of 71.6 V at its rated peak pulse current (IPPM) of 8.4 A, measured under the standard 10/1000 μs double-exponential surge waveform. This value ensures protected circuitry remains within safe operating limits during transient events, and is confirmed in the Vishay datasheet Document Number 87606, Table on page 2.
Does SMBJ45D-M3/H meet RoHS and halogen-free requirements?
Yes, SMBJ45D-M3/H carries the M3 suffix, indicating full compliance with RoHS Directive 2011/65/EU, halogen-free construction (per IEC 61249-2-21), and industrial-grade qualification including JESD 201 Class 2 whisker resistance. The molding compound also meets UL 94 V-0 flammability rating.
What is the thermal resistance of SMBJ45D-M3/H when mounted on the minimum recommended pad layout?
When mounted on the minimum recommended copper pad layout (as defined in the Vishay SMBJ datasheet), the SMBJ45D-M3/H exhibits a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W. This value is critical for calculating safe power derating above 25 °C ambient temperature.
Can SMBJ45D-M3/H be used in bidirectional signal line protection?
No - SMBJ45D-M3/H is a unidirectional TVS diode, identified by the "D" suffix and cathode band marking. For bidirectional protection (e.g., on AC-coupled or differential lines like RS-485), the SMBJ45A-M3/H (with "A" suffix and no polarity band) must be used instead.
What is the reverse leakage current specification for SMBJ45D-M3/H at its 45 V stand-off voltage?
The SMBJ45D-M3/H specifies a maximum reverse leakage current (ID) of 0.5 μA at its rated stand-off voltage (VWM) of 45 V, measured at TA = 25 °C. This ultra-low leakage supports energy-sensitive applications such as battery-backed sensors and always-on monitoring circuits.
SMBJ45D-M3/H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50.8V
- Voltage - Clamping (Max) @ Ipp:
- 71.6V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ45D-M3/H FAQ
1.How can I place an order for SMBJ45D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45D-M3/H 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 SMBJ45D-M3/H reliable?
The price and inventory of SMBJ45D-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ45D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45D-M3/H?
SMBJ45D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45D-M3/H 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 SMBJ45D-M3/H?
For technical support, including SMBJ45D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45D-M3/H requirements.
6.How does Aetrix verify that SMBJ45D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ45D-M3/H 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 SMBJ45D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ45D-M3/H?
All SMBJ45D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45D-M3/H, 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 SMBJ45D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ45D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45D-M3/H 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 …
