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Vishay General Semiconductor - Diodes Division SMA5J30AHM3_A/I
- Part No.:
- SMA5J30AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J30AHM3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,040
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Product details
Overview
SMA5J30AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on DC power rails and signal lines. It features 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR at 1 mA), 48.4 V clamping voltage (VC) at 10.3 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interfaces.
For engineers reviewing the SMA5J30AHM3_A/I datasheet, SMA5J30AHM3_A/I pinout, SMA5J30AHM3_A/I application, or SMA5J30AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance of 25 °C/W junction-to-lead - critical for under-hood automotive designs requiring long-term reliability under thermal cycling.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below 30 V reverse stand-off voltage and rapidly transitions to low-impedance conduction when transients exceed its 33.3–36.8 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across temperature.
Designed for 10/1000 µs surge waveforms, it delivers 48.4 V clamping at 10.3 A while maintaining low incremental surge resistance and fast response time (<1 ns). The SMA package supports automated placement and meets MSL level 1 (260 °C reflow peak), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 3.3 V/5 V/12 V/24 V systems. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - verified breakdown range ensuring predictable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 48.4 V at 10.3 A - clamping voltage limits downstream IC stress during 500 W transient events; enables robust protection of 40 V-rated MOSFETs or microcontrollers. |
| PPPM | 500 W - peak pulse power handling per 10/1000 µs waveform; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges. |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMA (DO-214AC) - surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
Two-terminal unidirectional TVS diode in SMA (DO-214AC) package. Cathode indicated by band marking on body; anode is unmarked end. Terminals are matte tin-plated leads suitable for J-STD-002-compliant soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., +12 V rail); conducts transient energy to ground when voltage exceeds VBR. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground plane; completes clamping loop and establishes reference for VWM/VBR specification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control units and ADAS power supplies. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| Low incremental surge resistance | Enables tighter clamping (VC = 48.4 V) at 10.3 A, reducing voltage overshoot on sensitive 3.3 V/5 V logic compared to higher-Rsurge alternatives. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking - simplifies SMT production and reduces handling cost. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery feed to engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input rail and chassis ground to limit transient voltage to <48.4 V. Use Value: Prevents latch-up or gate oxide damage in 40 V-rated power management ICs and microcontrollers during 100 V/100 ms load dump events. |
Use Scenario: 24 V analog sensor output (e.g., pressure transducer) routed through noisy factory environment with motor drive coupling. IC Role / Device Role / Timing Role: Standoff protection element on sensor output line, absorbing inductive kickback and EFT bursts before reaching ADC front-end. Use Value: Maintains signal integrity by limiting transient excursions to <48.4 V, avoiding saturation or damage to 3.3 V rail-referenced instrumentation amplifiers. |
| Telecom DC Power Feeds | Consumer Device USB Power Input |
Use Scenario: -48 V telecom power distribution board subjected to lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Primary surge clamp on -48 V input rail, configured cathode-to-rail for negative-voltage suppression. Use Value: Clamps negative-going transients to -53.4 V (absolute value), protecting upstream DC/DC converters rated for -60 V input. |
Use Scenario: USB-C PD input stage in portable speaker where 20 V adapter connection risks overvoltage due to faulty chargers. IC Role / Device Role / Timing Role: Secondary overvoltage guard after primary buck converter, clamping 20 V rail against >30 V faults. Use Value: Limits fault voltage to 48.4 V before downstream LDOs or battery protection ICs, preventing thermal runaway in Li-ion charging circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J30AHE3_A/I | Same electrical specs (VWM, VBR, VC, PPPM), but RoHS-compliant commercial grade (E3) without AEC-Q101 qualification or halogen-free status. | Lacks automotive qualification; suitable for consumer/industrial use where AEC-Q101 is not mandated. | Select SMA5J30AHE3_A/I only if AEC-Q101 and halogen-free requirements are waived and cost is prioritized. |
| SMCJ30A | Same VWM (30 V) and VC (48.4 V), but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), higher IPPM (32.4 A), and 1500 W PPPM. | Used where higher surge margin is needed (e.g., mains-connected equipment), but requires larger PCB area and different pad layout. | Choose SMCJ30A only when 1500 W surge rating is required and board space allows SMC footprint; not drop-in compatible with SMA layout. |
Compared with SMA5J30AHM3_A/I, SMA5J30AHE3_A/I offers identical clamping performance at lower qualification tier, while SMCJ30A provides triple the surge power in a physically incompatible package - making SMA5J30AHM3_A/I the optimal choice for space-constrained, AEC-Q101–mandated automotive modules.
Availability
SMA5J30AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feeds requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMA5J30AHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series was developed for high-power-density transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, halogen-free materials, and compact SMA packaging for next-generation ECU and sensor module designs.
FAQ
What is the polarity configuration of the SMA5J30AHM3_A/I?
The SMA5J30AHM3_A/I is a unidirectional transient voltage suppressor diode. Its cathode is marked by a visible band on the SMA package body; the unmarked end is the anode. This polarity must be observed during PCB layout to ensure correct clamping direction on positive DC rails - reverse installation would prevent proper surge conduction and risk device failure during overvoltage events. The SMA5J30AHM3_A/I data sheet confirms unidirectional operation only.
Does the SMA5J30AHM3_A/I meet AEC-Q101 qualification requirements?
Yes, the SMA5J30AHM3_A/I is fully AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), validating its suitability for automotive under-hood applications such as engine control units and ADAS power supplies. The HM3 designation also confirms halogen-free and RoHS-compliant construction.
What is the maximum clamping voltage of the SMA5J30AHM3_A/I and at what current is it specified?
The SMA5J30AHM3_A/I has a maximum clamping voltage (VC) of 48.4 V, measured at a peak pulse current (IPPM) of 10.3 A using the standardized 10/1000 µs waveform. This value represents the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with downstream components rated for ≤50 V absolute maximum ratings, such as automotive-grade microcontrollers and power MOSFETs.
Can the SMA5J30AHM3_A/I be used in bidirectional surge protection applications?
No, the SMA5J30AHM3_A/I is strictly unidirectional and cannot provide symmetrical clamping for AC or bipolar transients. For bidirectional protection, Vishay specifies parts with the "CA" suffix (e.g., SMA5J30CA), which feature symmetric breakdown characteristics in both polarities. Using SMA5J30AHM3_A/I in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance from junction to lead (RθJL) for the SMA5J30AHM3_A/I?
The SMA5J30AHM3_A/I has a typical thermal resistance from junction to lead (RθJL) of 25 °C/W, as specified in the Vishay datasheet Document Number 88875. This parameter reflects the device's ability to conduct heat from the silicon junction to its soldered terminals and is essential for calculating junction temperature rise under repetitive surge conditions - especially important in automotive applications where ambient temperatures exceed 105 °C and sustained power dissipation must remain within safe limits.
SMA5J30AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 10.3A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J30AHM3_A/I FAQ
1.How can I place an order for SMA5J30AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J30AHM3_A/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 SMA5J30AHM3_A/I reliable?
The price and inventory of SMA5J30AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J30AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J30AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J30AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J30AHM3_A/I?
SMA5J30AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J30AHM3_A/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 SMA5J30AHM3_A/I?
For technical support, including SMA5J30AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J30AHM3_A/I requirements.
6.How does Aetrix verify that SMA5J30AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J30AHM3_A/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 SMA5J30AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J30AHM3_A/I?
All SMA5J30AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J30AHM3_A/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 SMA5J30AHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J30AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J30AHM3_A/I Tags
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