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Vishay General Semiconductor - Diodes Division SMBJ75-E3/5B
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- Part No.:
- SMBJ75-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75-E3/5B.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,941
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Product details
Overview
SMBJ75-E3/5B 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 DC power rails and signal lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 5.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive ECUs, and telecom power supplies.
For engineers reviewing the SMBJ75-E3/5B datasheet, SMBJ75-E3/5B pinout, SMBJ75-E3/5B application, or SMBJ75-E3/5B equivalent, this page delivers verified electrical parameters, thermal behavior under surge conditions, RoHS-compliant commercial-grade packaging, and validated alternatives for ESD and lightning-induced transient suppression in 24–48 V systems.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 75 V, it avalanches to clamp transients at ≤121 V while conducting up to 5.0 A (10/1000 µs). Its low incremental surge resistance and <1 ps response time enable effective suppression of fast-rising EFT/burst and surge events per IEC 61000-4-4/5.
Thermally, it exhibits RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and supports continuous operation from −55 °C to +150 °C junction temperature. The device uses glass-passivated silicon junction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 48 V systems. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal rail voltage. |
| VC (Clamping Voltage) | 121 V at IPPM = 5.0 A (10/1000 µs) - Actual worst-case voltage seen by protected IC during surge; enables downstream component VDS/VCEO margining. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for standardized lightning/surge waveforms; validated per Fig. 1 derating curves. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands repetitive inductive switch-off surges without degradation; critical for relay/coil driver protection. |
| TJmax | +150 °C - Enables use in under-hood automotive and high-ambient industrial environments without thermal shutdown. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes conduction path during reverse avalanche. |
| Cathode (banded end) | High-side transient input terminal | Connected to protected line (e.g., 48 V rail); avalanche initiates here when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated clamping performance under IEC 61000-4-5 Level 3 (1 kV/2 kV surge) without failure or parameter shift. |
| 121 V clamping at 5.0 A | Ensures protected MOSFETs or controllers with 150 V VDS rating retain ≥20% voltage headroom during worst-case surge. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without delamination or bond wire damage. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU; no exemptions required; suitable for global consumer and industrial shipments. |
| Low leakage: ≤1.0 µA at 75 V | Minimizes standby power loss in always-on 48 V subsystems (e.g., telematics, CAN FD gateways). |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motor commutation and contactor switching. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between motor H-bridge supply rail and chassis ground. Use Value: Clamps transients to ≤121 V, preventing gate oxide rupture in 100 V MOSFETs and ensuring ASIL-B functional safety compliance. |
Use Scenario: Guarding LIN bus transceivers and microcontroller I/O pins against load dump and jump-start surges in BCM subassemblies. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V auxiliary rail feeding LIN PHY and sensor interface ICs. Use Value: Limits voltage excursion to 121 V during ISO 7637-2 Pulse 5a (load dump), preserving transceiver integrity without external series impedance. |
| Telecom Power Supplies | Smart Energy Meters |
|
Use Scenario: Secondary-side overvoltage protection on +48 V output of AC/DC front-end in PoE-powered base stations. IC Role / Device Role / Timing Role: Fast-response TVS across output capacitor bank to absorb flyback spikes from transformer leakage inductance. Use Value: Sub-ns response prevents 48 V rail overshoot beyond 121 V, avoiding latch-up in downstream PMICs and Ethernet PHYs. |
Use Scenario: Surge protection for RS-485 communication ports exposed to induced lightning transients on utility grid-connected meters. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (with series resistor) on differential data lines referenced to meter ground plane. Use Value: Delivers 600 W surge handling per line pair per IEC 61000-4-5, meeting EN 50470-3 immunity requirements without compromising data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and SMB package. | No difference in circuit function or layout; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure tenders). | Choose when halogen-free certification (IEC 61249-2-21) is contractually required; same thermal and surge performance. |
| SMCJ75A-E3/57T | Higher-power 1500 W version in larger SMC (DO-214AB) package; VWM = 75 V, VC = 121 V, but 11.3 A IPPM. | Used where higher single-event energy (e.g., direct lightning coupling) demands greater PPPM; requires PCB pad redesign. | Select only if system-level surge testing exceeds 600 W; not drop-in due to larger footprint and thermal mass. |
Compared with SMBJ75-E3/5B, the M3/5B offers identical protection with halogen-free materials, while the SMCJ75A-E3/57T provides 2.5× peak power in a non-compatible package - making the former a direct material alternative and the latter a higher-energy upgrade requiring layout revision.
Availability
SMBJ75-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, RoHS-compliant commercial-grade TVS diodes, and consistent 75 V standoff performance across production lots.
Supply support for SMBJ75-E3/5B 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMBJ series targets cost-sensitive, high-volume transient suppression in automotive, industrial, and communications equipment - engineered for rapid avalanche response, repeatable clamping, and compatibility with automated manufacturing.
FAQ
What is the maximum clamping voltage of SMBJ75-E3/5B under standard test conditions?
The SMBJ75-E3/5B has a maximum clamping voltage (VC) of 121 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 5.0 A. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75-E3/5B maintains this clamping performance across its qualified operating temperature range.
Is SMBJ75-E3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No - SMBJ75-E3/5B is a commercial-grade part with RoHS compliance (E3 suffix) but lacks AEC-Q101 qualification. For automotive use, select SMBJ75HE3_B/I or SMBJ75HM3_B/I variants, which carry the HE3/HM3 suffix and are explicitly qualified per AEC-Q101. The SMBJ75-E3/5B remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
What does the "/5B" suffix indicate in SMBJ75-E3/5B?
The "/5B" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-speed SMT placement and is distinct from "/52", which indicates 7-inch reels with 750 units. The SMBJ75-E3/5B is optimized for automated production lines requiring large-volume, continuous feed.
How does SMBJ75-E3/5B compare to bidirectional TVS diodes like SMBJ75CA?
The SMBJ75-E3/5B is unidirectional and intended for DC rail protection where polarity is fixed; it conducts only in reverse bias above VBR. In contrast, SMBJ75CA is bidirectional with symmetrical clamping in both directions, suited for AC lines or differential signals. They share identical VWM, VBR, and VC values, but SMBJ75-E3/5B offers lower leakage (<1.0 µA vs. ≤2.0 µA for CA) and is not interchangeable without circuit review.
What thermal derating applies to SMBJ75-E3/5B above 25 °C ambient?
SMBJ75-E3/5B follows the derating curve in Figure 2 of Vishay document 88392: peak pulse power decreases linearly from 600 W at 25 °C to zero at 150 °C junction temperature. At 75 °C ambient (assuming typical board thermal resistance), usable PPPM drops to ~420 W. Designers must calculate actual TJ using RθJA = 100 °C/W and ensure sustained operation stays within the −55 °C to +150 °C TJ range. The SMBJ75-E3/5B's thermal design supports this via its DO-214AA footprint and copper pad layout guidance.
SMBJ75-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 4.5A
- 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)
SMBJ75-E3/5B FAQ
1.How can I place an order for SMBJ75-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75-E3/5B 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 SMBJ75-E3/5B reliable?
The price and inventory of SMBJ75-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75-E3/5B?
SMBJ75-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75-E3/5B 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 SMBJ75-E3/5B?
For technical support, including SMBJ75-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75-E3/5B requirements.
6.How does Aetrix verify that SMBJ75-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75-E3/5B 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 SMBJ75-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75-E3/5B?
All SMBJ75-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75-E3/5B, 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 SMBJ75-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ75-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75-E3/5B Tags
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