My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ30AHM3/I
- Part No.:
- SMCJ30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30AHM3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,278
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ30AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation with a 10/1000 µs waveform.
For engineers reviewing the SMCJ30AHM3/I datasheet, SMCJ30AHM3/I pinout, SMCJ30AHM3/I application, or SMCJ30AHM3/I equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC power supply inputs where fast response (<1 ns), low incremental surge resistance, and AEC-Q101 qualification are required.
Technical Context
The SMCJ30AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, exhibiting sharp breakdown behavior above its 33.3–36.8 V minimum-to-maximum breakdown voltage (VBR) range at 1.0 mA test current. Its clamping action limits transient voltages to ≤48.4 V under 31.0 A 10/1000 µs surge conditions, ensuring downstream ICs and MOSFETs remain within safe operating limits.
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with 75 °C/W typical junction-to-ambient thermal resistance (RθJA) on standard 8.0 mm × 8.0 mm copper pads. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping begins; defines upper limit of normal circuit operation. |
| VBR min/max | 33.3 V / 36.8 V - Breakdown occurs within this range at 1.0 mA; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 48.4 V - Clamped voltage during 31.0 A 10/1000 µs surge; determines maximum stress on protected circuitry. |
| PPPM | 1500 W - Peak transient power it can absorb without failure; enables protection against high-energy transients. |
| ID @ VWM | 1.0 µA - Reverse leakage at 30 V; negligible loading on 30 V supply rails during normal operation. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and high-temperature industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated placement and reflow soldering. |
Pinout & Package
SMCJ30AHM3/I uses the standard SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, polarity indicated by a cathode band on the body. Mounting requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal for rated power handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-voltage reference; completes conduction path during reverse transient events. |
| Cathode | High-side connection (marked with band) | Connected to protected line (e.g., 30 V rail); avalanche conduction occurs when line voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies, supporting long-term reliability under thermal cycling and vibration. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) on 12 V/24 V systems without degradation. |
| Fast response time & low clamping ratio | Sub-nanosecond response and VC/VWM = 1.61 enable protection of 3.3 V/5 V logic interfaces powered from 30 V rails via LDOs or DC-DC converters. |
| Halogen-free, RoHS-compliant (HM3) | Meets automotive environmental standards and JESD201 Class 2 whisker resistance; suitable for lead-free reflow profiles up to 260 °C peak. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for MOSFET gate drivers and CAN transceivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 30 V battery-fed ECUs against load dump (ISO 16750-2) and alternator ripple-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 30 V input and chassis ground, clamping surges before they reach DC-DC regulators and microcontrollers. Use Value: Limits transient voltage to ≤48.4 V, preserving regulator input rating and preventing latch-up in downstream 5 V logic. | Use Scenario: Safeguarding analog outputs of 4–20 mA current-loop sensors exposed to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across sensor output terminals to shunt transients before they enter signal conditioning amplifiers or ADC front-ends. Use Value: 1.0 µA leakage at 30 V avoids loading precision current sources; 48.4 V clamping protects op-amps rated for ±36 V supply. |
| DC Power Supply Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Input stage protection for 30 V industrial SMPS modules subjected to AC line surges and cross-talk from adjacent switching circuits. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk capacitor input, coordinated with MOVs and fuses for staged surge suppression. Use Value: 1500 W rating handles multi-pulse surge events; SMC package allows compact layout near connector entry points. | Use Scenario: Shielding high-side N-channel MOSFET gate drivers in H-bridge inverters from shoot-through-induced voltage spikes during commutation. IC Role / Device Role / Timing Role: TVS placed between gate driver output and source node to clamp Miller-induced spikes exceeding VGS(max). Use Value: 33.3–36.8 V VBR aligns with common 30 V gate drive rails; fast response prevents false turn-on of power switches. |
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/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR/VC ratings. | Suitable for space-constrained consumer or telecom boards with lower surge exposure; not rated for automotive load dump. | Select when board area is critical and surge energy is limited to IEC 61000-4-2/4-4 levels. |
| SMCJ30A-M3/57T | Same electrical specs and SMC package, but M3 suffix indicates halogen-free RoHS compliance without AEC-Q101 qualification. | Appropriate for industrial or commercial equipment where automotive qualification is unnecessary. | Choose for cost-sensitive non-automotive designs requiring identical performance and thermal capability. |
Compared with SMCJ30AHM3/I, SMAJ30AHE3/A offers smaller size but reduced surge handling and no automotive qualification, while SMCJ30A-M3/57T matches all key parameters except AEC-Q101 validation-making it ideal for industrial use where qualification overhead is unnecessary.
Availability
SMCJ30AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC power supply input surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMCJ30AHM3/I 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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecommunications infrastructure where sustained surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage range of the SMCJ30AHM3/I?
The SMCJ30AHM3/I has a guaranteed breakdown voltage (VBR) range of 33.3 V to 36.8 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable turn-on above its 30 V standoff voltage while maintaining sufficient margin against normal operating variations. The SMCJ30AHM3/I's VBR tolerance supports consistent clamping behavior across production lots and temperature extremes from –55 °C to +150 °C.
Is the SMCJ30AHM3/I suitable for automotive applications?
Yes, the SMCJ30AHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). It meets automotive requirements for thermal cycling, mechanical shock, and surge immunity, making it appropriate for engine control units, body electronics, and ADAS power domains. The SMCJ30AHM3/I's 1500 W peak pulse rating and 48.4 V clamping voltage directly address ISO 16750-2 load dump and ISO 7637-2 transient specifications.
What is the maximum clamping voltage of the SMCJ30AHM3/I under surge conditions?
The SMCJ30AHM3/I exhibits a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 31.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC and IEC standards and represents the highest voltage seen across the device during worst-case surge events. Designers use this VC value to verify that downstream components-such as DC-DC controllers or gate drivers-remain within their absolute maximum voltage ratings when the SMCJ30AHM3/I is active.
Does the SMCJ30AHM3/I have polarity marking, and how is it oriented in circuit?
Yes, the SMCJ30AHM3/I is unidirectional and features a visible cathode band on the SMC (DO-214AB) package body. In circuit, the cathode must be connected to the line being protected (e.g., a 30 V rail), and the anode to ground or the return path. This orientation ensures avalanche conduction only during positive transients on the protected line relative to ground-preventing unwanted conduction during normal forward bias. The SMCJ30AHM3/I's polarity marking is essential for correct placement in PCB layouts and functional verification.
What packaging and compliance standards does the SMCJ30AHM3/I meet?
The SMCJ30AHM3/I uses halogen-free, RoHS-compliant molding compound and matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. Its HM3 suffix certifies compliance with JESD201 Class 2 whisker resistance and AEC-Q101 qualification. The device is supplied in 13″ diameter plastic tape and reel (I-packaging code), with 3500 units per reel, enabling high-volume automated assembly. The SMCJ30AHM3/I's full compliance profile supports automotive PPAP submissions and industrial safety certifications.
SMCJ30AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ30AHM3/I FAQ
1.How can I place an order for SMCJ30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30AHM3/I 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 SMCJ30AHM3/I reliable?
The price and inventory of SMCJ30AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ30AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30AHM3/I?
SMCJ30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30AHM3/I 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 SMCJ30AHM3/I?
For technical support, including SMCJ30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30AHM3/I requirements.
6.How does Aetrix verify that SMCJ30AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ30AHM3/I 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 SMCJ30AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ30AHM3/I?
All SMCJ30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30AHM3/I, 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 SMCJ30AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30AHM3/I 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 …
