My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ30CHE3/5A
- Part No.:
- SMAJ30CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CHE3/5A.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,628
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ30CHE3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 30 V stand-off voltage (VWM), 53.5 V maximum clamping voltage (VC) at 7.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMAJ30CHE3/5A datasheet, SMAJ30CHE3/5A pinout, SMAJ30CHE3/5A application, or SMAJ30CHE3/5A equivalent, key selection criteria include its AEC-Q101 qualification, bi-directional symmetry, low leakage (<1 µA at 30 V), RoHS-compliant high-reliability HE3 suffix, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 33.3 V (min) and 40.7 V (max) at 1 mA test current. Its clamping behavior is characterized by low dynamic impedance, enabling effective suppression of fast-rising ESD and lightning-induced surges up to 7.5 A under standardized 10/1000 µs conditions.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation from −55 °C to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020, with matte tin-plated leads qualified to JESD201 Class 2 whisker resistance and solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for protected line. |
| VC @ IPPM | 53.5 V at 7.5 A - Clamped voltage during 10/1000 µs surge; ensures downstream ICs see <54 V stress. |
| PPPM | 400 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 3 surges. |
| IPPM | 7.5 A - Peak surge current supported at rated clamping voltage; derived from 400 W / 53.5 V calculation. |
| TJ Range | −55 °C to +150 °C - Full automotive-grade operating and storage temperature range per AEC-Q101. |
| Leakage @ VWM | <1 µA - Minimal DC loading on protected circuit at rated stand-off voltage. |
| Package | DO-214AC (SMA) - Surface-mount outline with 5.0 × 5.0 mm thermal pad footprint; supports automated assembly. |
Pinout & Package
DO-214AC (SMA) package: bi-directional device with no polarity marking; symmetrical terminals suitable for AC-coupled or differential signal lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional clamping: conducts equally in either direction once VBR exceeded; no cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 10/1000 µs surge events up to 7.5 A without degradation. |
| Low clamping ratio (VC/VWM = 1.78) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow without moisture-related failure risk. |
| RoHS-compliant HE3 suffix | High-reliability variant with JESD201 Class 2 whisker resistance and extended lifetime under thermal cycling. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Maintains signal integrity under ±30 kV contact ESD (IEC 61000-4-2) and 10/1000 µs surges up to 7.5 A while adding <1 µA leakage. |
Use Scenario: Safeguarding PLC digital input modules exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Fast-response transient suppressor across 24 V DC input lines, mounted adjacent to terminal block. Use Value: Limits transient voltage to ≤53.5 V during 400 W surges, preventing latch-up or damage to optocoupler input stages. |
| Telecom Line Interface | Consumer Device USB/UART Lines |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) with matched VBR to preserve common-mode rejection. Use Value: Symmetrical clamping ensures balanced suppression on A/B lines, preserving signal timing and skew under surge conditions. |
Use Scenario: ESD protection for USB 2.0 D+/D− and UART TX/RX lines in smart home hubs and portable diagnostics tools. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed immediately after connector to minimize stub length. Use Value: Sub-1 µA leakage avoids pull-up/pull-down interference; 53.5 V clamping prevents damage to 3.3 V logic-level transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/5A | Uni-directional variant with same VWM (30 V) and VC (48.4 V), but asymmetric conduction; requires correct polarity orientation. | Applicable only where DC bias or unidirectional signal flow permits polarity-sensitive placement. | Select when protecting DC-biased lines (e.g., 24 V supply rails) and layout allows cathode alignment. |
| SMBJ30CHE3/5A | Same VWM and VC, but SMB package (DO-214AA); 600 W PPPM, larger thermal pad area (7.0 × 5.0 mm). | Better thermal performance for high-duty-cycle surges; requires PCB footprint change. | Choose for enhanced surge endurance in harsh environments where board space permits larger package. |
Compared with SMAJ30AHE3/5A, the SMAJ30CHE3/5A offers polarity-insensitive installation and matched bidirectional clamping, while SMBJ30CHE3/5A provides higher surge capacity at the cost of increased footprint - making SMAJ30CHE3/5A optimal for space-constrained automotive and industrial PCBs requiring AEC-Q101 compliance.
Availability
SMAJ30CHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer device USB/UART lines requiring stable component supply across production lifecycles.
Supply support for SMAJ30CHE3/5A 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 and automotive qualification.
The SMAJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-speed transient suppression in automotive, industrial, and telecom systems demanding AEC-Q101 validation and robust surge immunity.
FAQ
What is the clamping voltage of SMAJ30CHE3/5A under a 10/1000 µs surge?
The SMAJ30CHE3/5A has a maximum clamping voltage (VC) of 53.5 V at 7.5 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and reflects worst-case conduction behavior during surge events. The SMAJ30CHE3/5A maintains this clamping performance across its full operating temperature range.
Is SMAJ30CHE3/5A suitable for automotive applications?
Yes, SMAJ30CHE3/5A is AEC-Q101 qualified and designated as a high-reliability automotive-grade part (HE3 suffix). It operates from −55 °C to +150 °C, meets MSL Level 1, and is validated for use in engine control units, ADAS sensors, and body electronics. The SMAJ30CHE3/5A also complies with RoHS and JESD201 Class 2 whisker resistance requirements.
How does SMAJ30CHE3/5A differ from SMAJ30AHE3/5A?
SMAJ30CHE3/5A is bi-directional with symmetrical clamping in both polarities and no polarity marking, whereas SMAJ30AHE3/5A is uni-directional with a cathode band and lower clamping voltage (48.4 V vs. 53.5 V). The SMAJ30CHE3/5A supports AC-coupled or differential lines without orientation concerns, while SMAJ30AHE3/5A requires correct anode/cathode placement relative to DC bias.
What is the maximum reverse leakage current for SMAJ30CHE3/5A at its stand-off voltage?
The SMAJ30CHE3/5A exhibits a maximum reverse leakage current (ID) of 1 µA at its rated stand-off voltage (VWM) of 30 V, measured at TA = 25 °C. This low leakage ensures minimal impact on signal integrity or power rail loading in sensitive analog and digital circuits protected by the SMAJ30CHE3/5A.
What package type and mounting requirements apply to SMAJ30CHE3/5A?
SMAJ30CHE3/5A uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads. It requires 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal for rated 400 W pulse power dissipation. The SMAJ30CHE3/5A is compatible with J-STD-002 solderability standards and supports lead-free reflow up to 260 °C for 40 seconds.
SMAJ30CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 7.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ30CHE3/5A FAQ
1.How can I place an order for SMAJ30CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CHE3/5A 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 SMAJ30CHE3/5A reliable?
The price and inventory of SMAJ30CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ30CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CHE3/5A?
SMAJ30CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CHE3/5A 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 SMAJ30CHE3/5A?
For technical support, including SMAJ30CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CHE3/5A requirements.
6.How does Aetrix verify that SMAJ30CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ30CHE3/5A 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 SMAJ30CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ30CHE3/5A?
All SMAJ30CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CHE3/5A, 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 SMAJ30CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ30CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CHE3/5A 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 …
