My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ43C-E3/52
;;2.jpg)
- Part No.:
- SMBJ43C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43C-E3/52.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,988
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ43C-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (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.
For engineers reviewing the SMBJ43C-E3/52 datasheet, SMBJ43C-E3/52 pinout, SMBJ43C-E3/52 application, or SMBJ43C-E3/52 equivalent, key selection considerations include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 150 °C max junction temperature, RoHS-compliant matte tin-plated leads, and suitability for IC-level protection in industrial sensor interfaces and power supply input stages.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 43 V and rapidly transitions to low-impedance conduction above VBR (min 47.8 V), limiting transient voltages to ≤69.4 V at 8.6 A. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The SMBJ43C-E3/52 is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, derates linearly above 25 °C ambient per Fig. 2, and exhibits 100 °C/W typical junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC signal margin. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Ensures reliable turn-on within defined tolerance band during overvoltage events. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage seen by protected circuit during worst-case 10/1000 µs surge; determines downstream component stress. |
| PPPM | 600 W - Peak transient energy absorption capability; supports robust protection in automotive and industrial environments. |
| IPPM | 8.6 A - Maximum non-repetitive surge current the device can safely divert without degradation. |
| TJmax | 150 °C - Enables operation in high-temperature PCB layouts such as near power converters or motor drivers. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, MSL Level 1 (260 °C peak reflow). Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; completes clamping loop during transient conduction. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 43 V rail or signal); conducts avalanche current toward anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 43 V systems. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision for MOSFET gate or MCU I/O protection. |
| Glass passivated junction | Ensures long-term parameter stability and reduced parameter drift across temperature and lifetime cycling. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without halogen content restrictions; suitable for consumer and industrial use. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility without baking preconditioning. |
Applications
| Industrial Sensor Interface Protection | DC Power Input Surge Suppression |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop transmitters and analog sensor outputs from ESD and inductive kickback in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and ground, triggered only during positive overvoltage events. Use Value: Limits transient voltage to ≤69.4 V, preventing damage to precision op-amps and ADC front-ends while maintaining <1.0 µA leakage at 43 V nominal operation. |
Use Scenario: Safeguarding 48 V DC input rails of industrial controllers and PoE-powered devices against lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fuse and downstream TVS arrays. Use Value: Absorbs up to 600 W transient energy without failure, enabling system-level compliance with IEC 61000-4-5 Ed. 3 immunity requirements. |
| Automotive Body Control Module (BCM) Inputs | Telecom Line Card Transient Protection |
|
Use Scenario: Shielding microcontroller GPIOs and LIN bus receivers in BCMs from battery line transients and alternator load dump spikes. IC Role / Device Role / Timing Role: Localized TVS placed directly at connector entry points to minimize trace inductance and improve clamping speed. Use Value: Fast <1 ns response ensures clamping occurs before transient propagates into silicon, preserving AEC-Q100 Grade 2 reliability targets. |
Use Scenario: Protecting Ethernet PHY interface lines and auxiliary power feeds on telecom line cards exposed to AC mains coupling and field surges. IC Role / Device Role / Timing Role: Standoff-rated suppressor aligned with 43 V bias rails used in isolated DC-DC converters feeding PHY circuits. Use Value: Matches 43 V system architecture with tight VBR window (±5.0 V), minimizing false triggering while ensuring fail-safe clamping margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | Identical electrical specs and package; differs only in part numbering convention ('A' vs 'C' suffix denotes same unidirectional variant). | No functional difference; both intended for 43 V unidirectional clamping. | Select based on internal BOM alignment or distributor stock availability-fully interchangeable in design and layout. |
| SMCJ43A-E3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher power handling enables use in higher-energy surge environments (e.g., outdoor equipment), but requires larger PCB area. | Choose SMBJ43C-E3/52 when space-constrained designs prioritize footprint over extreme surge margin; SMCJ43A-E3/52 where 2.5× power headroom is required. |
Compared with SMBJ43A-E3/52, the SMBJ43C-E3/52 offers identical performance in identical form factor; compared with SMCJ43A-E3/52, it trades 2.5× peak power capacity for 40% smaller board area and lower thermal mass-critical for dense sensor node layouts.
Availability
SMBJ43C-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power input surge suppression, and automotive body control module inputs requiring stable component supply and consistent RoHS-compliant manufacturing.
Supply support for SMBJ43C-E3/52 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-reliability surface-mount transient suppression in space-constrained industrial, automotive, and telecom systems-balancing clamping precision, surge robustness, and automated assembly compatibility.
FAQ
What is the polarity configuration of SMBJ43C-E3/52?
The SMBJ43C-E3/52 is a unidirectional TVS diode, with the cathode marked by a band on the SMB (DO-214AA) package body. It conducts only when the cathode is at a higher potential than the anode-making it suitable for protecting positive-rail circuits like 43 V power supplies or signal lines referenced to ground. This polarity prevents unintended conduction during normal operation and ensures precise clamping behavior during positive transients. The SMBJ43C-E3/52 must be oriented correctly on PCB to function as intended.
Does SMBJ43C-E3/52 meet automotive qualification standards?
The SMBJ43C-E3/52 is RoHS-compliant and rated for commercial-grade operation; it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101 certification, Vishay offers the SMBJ43AHE3 variant (with HE3 suffix), which shares identical electrical parameters but undergoes additional stress testing and lot traceability. The SMBJ43C-E3/52 remains appropriate for non-safety-critical automotive subsystems where full qualification is not mandated, such as infotainment power rails or lighting control modules.
How does SMBJ43C-E3/52 compare to bidirectional TVS diodes like SMBJ43CA?
The SMBJ43C-E3/52 is unidirectional and optimized for clamping positive transients on grounded-reference systems, whereas SMBJ43CA is bidirectional and symmetric-capable of suppressing both positive and negative surges on floating or AC-coupled lines. SMBJ43C-E3/52 has lower leakage (<1.0 µA at 43 V) and tighter VBR tolerance than SMBJ43CA, making it preferable for DC-biased applications. The SMBJ43C-E3/52 cannot replace SMBJ43CA in differential or AC signal paths without redesigning the protection topology.
What is the maximum allowable PCB pad size for optimal thermal performance of SMBJ43C-E3/52?
Vishay specifies thermal ratings for SMBJ43C-E3/52 using 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, yielding RθJA = 100 °C/W. Increasing pad area beyond this improves heat dissipation marginally, but diminishing returns set in after ~0.3" × 0.3". Reducing pad size below specification significantly degrades thermal performance and may cause premature failure under repeated surges. The SMBJ43C-E3/52 must be mounted on minimum recommended pads to guarantee rated 600 W pulse power capability.
Can SMBJ43C-E3/52 be used in parallel to increase surge current handling?
No-SMBJ43C-E3/52 should not be paralleled without external balancing components. Minor VBR mismatches between units cause uneven current sharing, leading to thermal runaway in the lower-breakdown device. Vishay does not characterize or recommend parallel operation for the SMBJ43C-E3/52. To increase surge capacity, select a higher-power package (e.g., SMCJ43A-E3/52) or implement staged protection with upstream fusing and downstream TVS arrays. The SMBJ43C-E3/52 is designed for single-device implementation per protected node.
SMBJ43C-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBJ43C-E3/52 FAQ
1.How can I place an order for SMBJ43C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43C-E3/52 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 SMBJ43C-E3/52 reliable?
The price and inventory of SMBJ43C-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43C-E3/52?
SMBJ43C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43C-E3/52 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 SMBJ43C-E3/52?
For technical support, including SMBJ43C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43C-E3/52 requirements.
6.How does Aetrix verify that SMBJ43C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43C-E3/52 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 SMBJ43C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43C-E3/52?
All SMBJ43C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43C-E3/52, 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 SMBJ43C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ43C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43C-E3/52 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 …
