My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ43AHM3_B/H
- Part No.:
- SMBJ43AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHM3_B/H.pdf
- Description:
- 600W,43V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,173
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ43AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range (VBR at 1 mA), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and automotive ECUs.
For engineers reviewing the SMBJ43AHM3_B/H datasheet, SMBJ43AHM3_B/H pinout, SMBJ43AHM3_B/H application, or SMBJ43AHM3_B/H equivalent, this part delivers verified AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial designs requiring long-term surge immunity without layout redesign.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 600 W peak pulse power rating is specified under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and thermal performance is characterized by RθJA = 100 °C/W and RθJL = 20 °C/W.
The SMBJ43AHM3_B/H exhibits a maximum reverse leakage current of 1.0 µA at VWM = 43 V and a temperature coefficient of VBR of +0.102 %/°C. Its cathode-band polarity marking aligns with standard SMB package orientation, and it supports automated placement per J-STD-002 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed minimum/maximum breakdown threshold ensuring consistent turn-on across production lots. |
| VC (Clamping Voltage) | 69.4 V at IPPM = 8.6 A - Peak voltage seen by protected circuit during 600 W transient; enables safe interface with 75 V-rated ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under 10/1000 µs surge, validated per ANSI/IEEE C62.35 standards. |
| IPPM (Peak Pulse Current) | 8.6 A - Maximum non-repetitive surge current supported without degradation; derived directly from VC and PPPM. |
| TJmax | 150 °C - Maximum junction temperature enabling operation in under-hood automotive environments and industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement per datasheet fig. 2. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, MSL Level 1 (260 °C reflow peak), UL 94 V-0 rated compound. Cathode identified by band marking on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; forms clamping loop with cathode during transient events. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 48 V rail or CAN-H); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for ECU and ADAS module deployment. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms full compliance with JEDEC J-STD-20 and EU RoHS Directive 2011/65/EU - eliminates brominated flame retardants in molding compound. |
| 600 W peak pulse power | Enables single-device protection against ISO 7637-2 Pulse 1 (inductive switch-off) and IEC 61000-4-5 Combination Wave (10/700 µs) surges in 48 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping - reduces stress on downstream MOSFET gate oxides and MCU I/O structures. |
| MSL Level 1 handling | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - simplifies SMT manufacturing and reduces yield risk. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protection of 48 V supply rail feeding microcontroller and CAN transceiver in BCM after load-dump event. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed upstream of LDO regulator input. Use Value: Limits transient voltage to ≤69.4 V during 120 V/50 ms load dump, preventing regulator latch-up and preserving system boot integrity. |
Use Scenario: Surge suppression on 24 V DC digital input channel exposed to field wiring in factory automation cabinet. IC Role / Device Role / Timing Role: Primary overvoltage clamp on optocoupler input side, coordinated with series current-limiting resistor. Use Value: Absorbs 600 W IEC 61000-4-4 EFT bursts without degradation, maintaining >100 k-cycle lifetime under repetitive switching noise. |
| Telecom Remote Radio Unit (RRU) | Medical Infusion Pump Motor Driver |
|
Use Scenario: Protection of RS-485 communication lines between baseband unit and remote radio head in outdoor telecom enclosure. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential pair, paired with common-mode choke. Use Value: Clamps induced lightning-induced surges to <70 V, preserving signal integrity and avoiding false UART framing errors. |
Use Scenario: Input rail protection for H-bridge driver IC powering stepper motor in battery-operated infusion pump. IC Role / Device Role / Timing Role: Unidirectional clamping element on 12 V motor supply, located adjacent to driver IC power pins. Use Value: Withstands 100 A IFSM half-sine surge from motor back-EMF reversal, eliminating need for external fuse coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant with lead-based finish (E3), not halogen-free. | Approved for commercial/industrial use only; not qualified to AEC-Q101. | Select when automotive qualification is unnecessary and cost optimization is prioritized over halogen-free compliance. |
| SMAJ43A-M3/5B | Lower 400 W PPPM, SMA package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VC ratings. | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation. | Choose only for space-constrained consumer applications where 600 W surge margin is not required. |
Compared with SMBJ43AHM3_B/H, the E3 variant lacks AEC-Q101 validation and halogen-free status, while the SMAJ43A-M3/5B sacrifices 33% peak power handling and thermal robustness - making SMBJ43AHM3_B/H the sole choice for automotive-grade 48 V rail protection with full regulatory alignment.
Availability
SMBJ43AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and medical motor drive systems requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.
Supply support for SMBJ43AHM3_B/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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be eliminated through rigorous AEC-Q101 and IEC/EN standard compliance.
FAQ
What is the maximum clamping voltage of SMBJ43AHM3_B/H at its rated peak pulse current?
The SMBJ43AHM3_B/H has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 8.6 A, measured under the standardized 10/1000 µs waveform condition. This value ensures protected circuits remain below critical voltage thresholds during surge events, and it is fully validated in Vishay's datasheet revision 09-Jan-2024, Document Number 88392. The SMBJ43AHM3_B/H maintains this clamping performance across its operational temperature range of –55 °C to +150 °C.
Is SMBJ43AHM3_B/H qualified for automotive applications?
Yes, SMBJ43AHM3_B/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and explicit notation in the Vishay datasheet (page 3, Note 1). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance - making SMBJ43AHM3_B/H suitable for under-hood and chassis-mounted automotive modules such as body control units and ADAS sensor interfaces. The SMBJ43AHM3_B/H meets all requirements for permanent installation in production vehicles.
What does the "HM3" suffix indicate in SMBJ43AHM3_B/H?
The "HM3" suffix in SMBJ43AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS-compliant, commercial grade) and HE3 (RoHS-compliant, AEC-Q101) variants. Per Vishay's ordering information table, HM3 confirms both environmental compliance (IEC 61249-2-21) and automotive reliability validation. The SMBJ43AHM3_B/H is supplied in 7" tape-and-reel packaging (code H) and is rated for MSL Level 1 handling.
How does SMBJ43AHM3_B/H compare to bidirectional TVS diodes like SMBJ43CA?
SMBJ43AHM3_B/H is unidirectional and intended for DC rail protection where polarity is fixed, offering lower leakage (<1.0 µA at 43 V) and higher surge current capability in one direction. In contrast, SMBJ43CA is bidirectional and suited for AC or differential signal lines (e.g., RS-485), but exhibits doubled leakage for VWM ≤10 V and lacks the same automotive qualification path. The SMBJ43AHM3_B/H is not interchangeable with SMBJ43CA without circuit-level review of polarity and leakage constraints.
What is the thermal resistance specification for SMBJ43AHM3_B/H?
The SMBJ43AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout. These values define its steady-state and transient thermal behavior - critical for derating calculations in high-temperature environments. The SMBJ43AHM3_B/H must be mounted per Vishay's pad layout guidelines to ensure these thermal metrics hold in actual PCB implementation.
SMBJ43AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
SMBJ43AHM3_B/H FAQ
1.How can I place an order for SMBJ43AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHM3_B/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 SMBJ43AHM3_B/H reliable?
The price and inventory of SMBJ43AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ43AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHM3_B/H?
SMBJ43AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHM3_B/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 SMBJ43AHM3_B/H?
For technical support, including SMBJ43AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ43AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHM3_B/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 SMBJ43AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ43AHM3_B/H?
All SMBJ43AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHM3_B/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 SMBJ43AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ43AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AHM3_B/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 …
