My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ58AHM3_A/I
- Part No.:
- SMAJ58AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHM3_A/I.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,987
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ58AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 58 V stand-off voltage (VWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power interfaces.
For engineers reviewing the SMAJ58AHM3_A/I datasheet, SMAJ58AHM3_A/I pinout, SMAJ58AHM3_A/I application, or SMAJ58AHM3_A/I equivalent, key selection criteria include clamping performance under 4.3 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 120 °C/W) for PCB-level thermal design.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 58 V, it avalanches to limit transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at VWM), while the SMA package supports automated SMT placement and meets MSL level 1 (260 °C reflow peak).
Designed for single-polarity DC circuits, SMAJ58AHM3_A/I responds in <1 ps to transients induced by inductive switching or ESD events. It sustains 40 A non-repetitive forward surge (8.3 ms half-sine) and derates linearly above 25 °C ambient per Fig. 2 - enabling use in under-hood automotive environments up to +125 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - defines reliable avalanche initiation window for design margining |
| VC @ IPPM | 93.6 V at 4.3 A - peak clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak pulse power handling capability, critical for ISO 7637-2 pulse 1/2a/5a immunity |
| IFSM | 40 A - surge current rating for 8.3 ms half-sine, supporting load-dump survival in 12 V systems |
| TJ max | +150 °C - enables operation in high-temperature automotive and industrial enclosures |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified (HM3 suffix). Cathode indicated by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Meets ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump) requirements for 12 V automotive systems |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22 standards |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 μA) across -55 °C to +150 °C operating range |
| MSL level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of body control modules (BCMs) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and local regulator input. Use Value: Clamps 120 V/200 ms load dump transients to ≤93.6 V, preventing LDO damage and ensuring system reset integrity. | Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLC I/O cards. IC Role / Device Role / Timing Role: Point-of-entry TVS on 4–20 mA loop output lines exposed to field wiring surges. Use Value: Limits induced transients to sub-100 V levels within nanoseconds, preserving 16-bit DAC accuracy and avoiding ADC saturation. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
Use Scenario: Shielding PoE-powered switches from Ethernet cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary TVS on 48 V DC input stage upstream of DC/DC converters. Use Value: Absorbs 400 W pulses without degradation, maintaining >100 k-cycle surge life per IEC 61000-4-5 Level 3. | Use Scenario: Securing 5 V/9 V USB-C adapter outputs against user-induced short-circuit and plug-in spikes. IC Role / Device Role / Timing Role: Final-stage TVS between secondary-side rectifier and output connector. Use Value: Prevents latch-up in connected devices by clamping 100 V/100 ns spikes to <95 V with <1 ps response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58AHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification; unsuitable for strict environmental compliance programs (e.g., EU automotive Tier 1) | Select SMAJ58AHM3_A/I when halogen-free material content is mandated. |
| SMCJ58A-HM3 | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC | Used where higher surge endurance is required (e.g., main battery fuse box), but requires larger PCB footprint | Choose SMAJ58AHM3_A/I for space-constrained layouts needing 400 W protection in minimal area. |
Compared with SMAJ58AHE3_A/I, SMAJ58AHM3_A/I adds halogen-free compliance without sacrificing performance; versus SMCJ58A-HM3, it trades surge capacity for compact SMA footprint - making SMAJ58AHM3_A/I optimal for cost-sensitive, space-limited automotive and industrial modules requiring AEC-Q101 validation.
Availability
SMAJ58AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified reliability.
Supply support for SMAJ58AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where precise clamping, fast response, and qualification-grade consistency are mandatory.
FAQ
What is the clamping voltage of SMAJ58AHM3_A/I at its rated peak pulse current?
The SMAJ58AHM3_A/I has a maximum clamping voltage (VC) of 93.6 V at its specified peak pulse current (IPPM) of 4.3 A, measured using the standardized 10/1000 μs double-exponential waveform. This value ensures downstream components like regulators and microcontrollers remain within safe operating limits during surge events. The clamping performance is guaranteed across the full operating temperature range of -55 °C to +150 °C.
Is SMAJ58AHM3_A/I qualified for automotive applications?
Yes, SMAJ58AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code - indicating halogen-free, RoHS-compliant construction validated for automotive-grade reliability. It undergoes stress testing per JESD22 standards including temperature cycling, highly accelerated life testing (HALT), and ESD robustness, making SMAJ58AHM3_A/I suitable for engine control units, ADAS sensors, and infotainment power supplies.
How does the SMAJ58AHM3_A/I differ from the SMAJ58A-E3 variant?
SMAJ58AHM3_A/I and SMAJ58A-E3 share identical electrical characteristics (VWM, VBR, VC, PPPM) and package (SMA/DO-214AC), but differ in material compliance: SMAJ58AHM3_A/I is halogen-free and AEC-Q101 qualified, whereas SMAJ58A-E3 is RoHS-compliant only (no halogen-free or automotive qualification). Therefore, SMAJ58AHM3_A/I meets stricter environmental and reliability requirements for Tier 1 automotive programs.
What is the thermal resistance of SMAJ58AHM3_A/I, and how does it affect layout design?
SMAJ58AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; designers must allocate sufficient copper area and consider airflow to maintain TJ ≤ 150 °C during repetitive surge events. For high-duty-cycle applications, adding thermal vias under the pads reduces RθJA by ~20–30 %.
Can SMAJ58AHM3_A/I be used in bidirectional signal line protection?
No, SMAJ58AHM3_A/I is a unidirectional TVS diode, identified by its cathode band marking and specified parameters (e.g., VF = 3.5 V at 25 A forward current). For bidirectional protection - such as RS-485 or CAN bus lines - a bidirectional variant like SMAJ58CA must be selected. Using SMAJ58AHM3_A/I on AC-coupled or symmetric signal paths risks forward conduction and improper clamping behavior.
SMAJ58AHM3_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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ58AHM3_A/I FAQ
1.How can I place an order for SMAJ58AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHM3_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 SMAJ58AHM3_A/I reliable?
The price and inventory of SMAJ58AHM3_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 SMAJ58AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ58AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHM3_A/I?
SMAJ58AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHM3_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 SMAJ58AHM3_A/I?
For technical support, including SMAJ58AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ58AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHM3_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 SMAJ58AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ58AHM3_A/I?
All SMAJ58AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHM3_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 SMAJ58AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ58AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58AHM3_A/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 …
