My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J30C-E3/52
- Part No.:
- SMB8J30C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30C-E3/52.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J30C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 16.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J30C-E3/52 datasheet, SMB8J30C-E3/52 pinout, SMB8J30C-E3/52 application, or SMB8J30C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low leakage (<1.0 μA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive stress.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, the SMB8J30C-E3/52 supports automotive-grade reliability with MSL level 1 moisture sensitivity 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 | 30 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown voltage range at 1.0 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 48.4 V - Clamping voltage at 16.5 A peak pulse current (10/1000 μs); limits downstream voltage stress during surge events. |
| PPPM | 800 W - Peak pulse power handling per 10/1000 μs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 μA - Reverse leakage current at 30 V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| RθJA | 72 °C/W - Junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional device with no polarity marking - symmetrical terminals suitable for AC-coupled or floating signal lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional operation: either terminal serves as anode or cathode depending on transient polarity; no color band or marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded sensor outputs without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive under-hood and chassis-mounted electronics subject to thermal cycling, vibration, and humidity stress. |
| Glass passivated junction | Improves long-term stability of breakdown voltage and reduces parameter drift over temperature and lifetime vs. epoxy-passivated alternatives. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs - critical for safeguarding 3.3 V or 5 V logic inputs adjacent to 24 V supply domains. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤48.4 V during 10/1000 μs surges up to 800 W, preserving ADC integrity and avoiding system reset. |
Use Scenario: Guarding differential A/B lines of RS-485 transceivers in factory automation PLCs subjected to EFT and surge events. IC Role / Device Role / Timing Role: Symmetrical TVS connected line-to-line and line-to-ground to absorb common-mode and differential-mode transients. Use Value: Maintains signal integrity by clamping within 48.4 V while supporting >1 Mbps data rates due to low junction capacitance (typ. <100 pF at 0 V). |
| Consumer Power Adapter Input | Medical Equipment Signal Isolation Barrier |
Use Scenario: Secondary-side DC bus protection in 24 V wall adapters used in smart home hubs, guarding against cross-conduction faults. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across output rails to shunt overvoltage before it reaches downstream regulators. Use Value: Withstands 30 V continuous operation and clamps to 48.4 V during 16.5 A surges, preventing damage to 3.3 V/5 V PMICs. |
Use Scenario: Protecting isolated analog front-end inputs in patient monitoring devices where signal accuracy must be preserved post-surge. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) bi-directional TVS on isolated sensor channel inputs referenced to local ground. Use Value: Prevents baseline shift or saturation in precision amplifiers by limiting transient excursion without introducing offset error via leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-T | Same DO-214AA package, identical VWM (30 V) and VC (48.4 V), but rated for 600 W PPPM (vs. 800 W) and not AEC-Q101 qualified. | Limited to commercial-grade industrial or consumer use; unsuitable for automotive under-hood deployment. | Select when cost sensitivity outweighs automotive qualification and 200 W lower surge margin is acceptable. |
| 1.5KE30CA | Through-hole DO-201 package, same VWM/VC specs, 1500 W PPPM rating, but higher RθJA (~50 °C/W) and no AEC-Q101 qualification. | Requires PCB real estate for axial leads and manual assembly; incompatible with high-density SMT layouts. | Choose only if legacy through-hole design mandates footprint continuity and higher single-pulse energy absorption is needed. |
Compared with SMBJ30CA-T and 1.5KE30CA, SMB8J30C-E3/52 uniquely delivers AEC-Q101 qualification, 800 W surge rating in compact DO-214AA, and MSL Level 1 compatibility - making it the optimal choice for new automotive and space-constrained industrial designs requiring validated reliability.
Availability
SMB8J30C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and medical signal isolation barrier applications requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J30C-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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of SMB8J30C-E3/52 at its rated peak pulse current?
The SMB8J30C-E3/52 exhibits a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 16.5 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry during surge events. The SMB8J30C-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J30C-E3/52 suitable for automotive applications?
Yes, SMB8J30C-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction - glass-passivated junction, matte tin-plated leads, MSL Level 1 rating, and guaranteed operation from -55 °C to +150 °C - meets stringent automotive reliability requirements. The SMB8J30C-E3/52 is designated with the "HE3" suffix variant for full AEC-Q101 compliance; the "E3/52" version is RoHS-compliant commercial grade but shares identical electrical specs and package.
How does the bi-directional configuration of SMB8J30C-E3/52 affect its circuit implementation?
The SMB8J30C-E3/52 has no polarity marking and functions identically in either orientation, making it ideal for protecting AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating sensor outputs. Unlike uni-directional TVS diodes, it clamps transients of either polarity between the same two terminals - eliminating layout constraints related to cathode/anode placement. This symmetry simplifies PCB routing and reduces BOM complexity in bidirectional signal paths. The SMB8J30C-E3/52 achieves this via a back-to-back diode structure integrated into a single DO-214AA package.
What is the recommended PCB pad layout for SMB8J30C-E3/52 to achieve rated power dissipation?
To achieve the full 800 W peak pulse power rating and maintain thermal performance, Vishay specifies mounting SMB8J30C-E3/52 on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These pads must be directly connected to internal or external copper planes to realize the specified RθJA of 72 °C/W. Reducing pad size or isolating terminals degrades thermal performance and reduces surge current handling - for example, halving pad area may increase junction temperature rise by >30 % during a 10/1000 μs pulse. The SMB8J30C-E3/52 datasheet provides exact dimensional tolerances for DO-214AA land patterns.
Does SMB8J30C-E3/52 meet RoHS and lead-free assembly requirements?
Yes, SMB8J30C-E3/52 carries the "E3" suffix indicating full RoHS compliance per Directive 2011/65/EU and is compatible with lead-free reflow soldering processes. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the device is rated MSL Level 1 with a maximum peak reflow temperature of 260 °C - supporting standard Pb-free SAC305 profiles without preconditioning. The SMB8J30C-E3/52 also passes JESD 201 Class 1A whisker testing, ensuring long-term interconnect reliability.
SMB8J30C-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J30C-E3/52 FAQ
1.How can I place an order for SMB8J30C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30C-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 SMB8J30C-E3/52 reliable?
The price and inventory of SMB8J30C-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 SMB8J30C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J30C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30C-E3/52?
SMB8J30C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30C-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 SMB8J30C-E3/52?
For technical support, including SMB8J30C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30C-E3/52 requirements.
6.How does Aetrix verify that SMB8J30C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J30C-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 SMB8J30C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J30C-E3/52?
All SMB8J30C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30C-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 SMB8J30C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J30C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30C-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 …
