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Taiwan Semiconductor Corporation SMDJ58AH
- Part No.:
- SMDJ58AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ58AH.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,787
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Product details
Overview
SMDJ58AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with a working stand-off voltage of 58 V, breakdown voltage range 64.4–71.2 V, and clamping voltage of 93.6 V at 32.1 A peak pulse current. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and switching transient protection.
For engineers reviewing the SMDJ58AH datasheet, SMDJ58AH pinout, SMDJ58AH application, or SMDJ58AH equivalent, key selection criteria include its 3000 W peak pulse power rating, 93.6 V clamping performance at 32.1 A, AEC-Q101 qualification, ISO 7637-2 compliance, and DO-214AB thermal resistance (RθJA = 75 °C/W), critical for under-hood automotive electronics and industrial power rail protection.
Technical Context
The SMDJ58AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-1 ps response time and stable clamping under fast transients. Its single-die configuration supports high-energy surge handling up to 3000 W for 1 ms pulses while maintaining low leakage (≤1 µA at 58 V) and robust thermal performance (TJ max = 175 °C).
Designed for automotive-grade reliability, it satisfies JESD201 Class 2 whisker resistance, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 molding compound requirements. The device's forward voltage is not specified for bidirectional use - per datasheet note, VF = 3.5 V applies only to unidirectional variants like SMDJ58AH (not SMDJ58CAH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR @ IT=1 mA | 64.4–71.2 V - Breakdown voltage range defining onset of avalanche conduction; ensures consistent turn-on across production lots. |
| VC @ IPPM=32.1 A | 93.6 V - Clamping voltage during 10/1000 µs surge; determines maximum stress on downstream ICs during ESD or load dump. |
| PPK | 3000 W - Peak pulse power dissipation capability for 1 ms; enables protection against high-energy transients per ISO 7637-2 Pulse 5a. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; defines required PCB copper area and airflow for sustained 6.5 W steady-state operation. |
| IFSM | 300 A - Peak forward surge current (8.3 ms half-sine); supports robustness against repetitive inductive kick events in motor control circuits. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, RoHS and halogen-free compliant, weight ≈ 0.290 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected circuit ground or low-side reference; completes clamping loop during reverse-transient events. |
| Cathode | Reverse-biased terminal / Transient shunt node | Connected to power rail (e.g., 12 V/24 V battery line); conducts avalanche current to ground when VIN exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood temperature cycling (-55 °C to +175 °C), vibration, and humidity stress - enables direct use in engine control units and body modules. |
| ISO 7637-2 Pulse compliance | Tested and rated for Pulses 1, 2a, 2b, 3a, and 3b - covers load-dump, supply interruption, and coupled transient immunity in 12 V/24 V vehicle networks. |
| Glass passivated junction | Ensures stable VBR tolerance and low parameter drift over lifetime; eliminates risk of junction corrosion in humid or chemically aggressive environments. |
| Sub-1 ps response time | Enables effective suppression of ESD events (IEC 61000-4-2) and fast-rising transients (<10 ns rise time) before sensitive logic or analog circuitry is damaged. |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input Stage |
|---|---|
Use Scenario: Protecting 24 V CAN bus nodes and microcontroller power supplies in commercial vehicle ECUs against load-dump transients up to 35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role: Primary clamping element placed between battery rail and DC-DC converter input, shunting surge energy to chassis ground. Use Value: Limits voltage seen by downstream regulators to ≤93.6 V during 3000 W surges, preventing latch-up or permanent damage to 36 V-rated input stages. | Use Scenario: Safeguarding programmable logic controller (PLC) 24 V DC inputs from relay coil flyback and lightning-induced surges in factory automation cabinets. IC Role / Device Role: Standoff protector mounted directly at DIN-rail power feedthrough, upstream of filtering and regulation. Use Value: Withstands ≥32.1 A peak impulse without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 testing. |
| Telecom Base Station DC Feeds | Renewable Energy Charge Controller Inputs |
Use Scenario: Securing remote radio head (RRH) 48 V DC power interfaces against induced surges from nearby lightning strikes on tower-mounted antennas. IC Role / Device Role: First-line transient suppressor on outdoor-rated power entry board, coordinated with GDT and MOV secondary stages. Use Value: Fast <1 ps response captures initial transient edge before slower protectors activate, reducing let-through energy by >40% versus MOV-only designs. | Use Scenario: Protecting solar charge controller inputs connected to 60 V nominal PV arrays exposed to rapid irradiance changes and grid-switching transients. IC Role / Device Role: Unidirectional TVS placed between PV+ and ground, clamping reverse-polarity surges generated by partial shading or string mismatch. Use Value: 58 V VWM allows full utilization of PV array's 60 V open-circuit voltage while blocking normal operation leakage (<1 µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | Same DO-214AC (SMA) package; lower PPK = 400 W; VC = 93.6 V @ 4.3 A; RθJA ≈ 100 °C/W | Not AEC-Q101 qualified; limited to non-automotive industrial use; insufficient for ISO 7637-2 Pulse 5a | Select only for cost-sensitive, low-energy surge environments where 3000 W rating is unnecessary. |
| ON Semiconductor 1.5SMC58A | DO-214AB (SMC) package; PPK = 1500 W; VC = 93.6 V @ 16.1 A; no AEC-Q101 or ISO 7637-2 documentation | Rated for general-purpose ESD only; lacks automotive qualification and pulse test validation | Acceptable for consumer electronics or lab equipment where automotive standards are not mandated. |
Compared with SMAJ58A and 1.5SMC58A, the SMDJ58AH delivers 2× higher peak power (3000 W vs. 1500/400 W), certified AEC-Q101 reliability, and documented ISO 7637-2 Pulse 1–3b compliance - making it the sole choice for functional safety-critical automotive power rails requiring validated surge immunity.
Availability
SMDJ58AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC power input protection, and telecom base station DC feed applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMDJ58AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101-certified production lines.
The SMDJ series is designed specifically for high-reliability automotive and industrial transient suppression, emphasizing robust clamping, fast response, and compliance with ISO 7637-2 and AEC-Q101 for under-hood and harsh-environment deployment.
FAQ
What is the maximum clamping voltage of the SMDJ58AH under standard test conditions?
The SMDJ58AH has a maximum clamping voltage (VC) of 93.6 V when subjected to a 10/1000 µs waveform peak pulse current (IPPM) of 32.1 A at TA = 25 °C. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMDJ58AH maintains this clamping performance across its full operating temperature range, ensuring predictable protection behavior in automotive and industrial environments.
Is the SMDJ58AH suitable for bidirectional transient suppression?
No, the SMDJ58AH is a unidirectional TVS diode intended for DC power line protection where polarity is fixed. For bidirectional applications, the SMDJ58CAH variant must be used - it shares the same VWM (58 V) and clamping performance but supports symmetrical surge suppression in AC or floating systems. The SMDJ58AH's cathode band marking and electrical specifications apply only in the reverse direction; forward conduction is not characterized for surge handling.
Does the SMDJ58AH meet automotive qualification standards?
Yes, the SMDJ58AH is explicitly AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. Its construction - including glass-passivated junction, JESD201 Class 2 whisker resistance, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 molding compound - satisfies full automotive component requirements. This makes the SMDJ58AH appropriate for engine control, body electronics, and ADAS power domains where reliability under thermal, mechanical, and electrical stress is mandatory.
What is the thermal resistance and maximum junction temperature of the SMDJ58AH?
The SMDJ58AH has a junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum junction temperature (TJ) of +175 °C. Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting efficient heat transfer to PCB copper planes. These values enable reliable operation at full 6.5 W steady-state power dissipation when mounted on ≥1 in² 2-oz copper with thermal vias - critical for compact automotive modules where ambient temperatures exceed 105 °C.
How does the SMDJ58AH compare to lower-voltage SMDJ series parts like SMDJ24AH in terms of surge handling?
The SMDJ58AH and SMDJ24AH share identical package (DO-214AB), peak power rating (3000 W), and response time (<1 ps), but differ in voltage ratings: SMDJ24AH has VWM = 24 V, VBR = 26.7–29.5 V, and VC = 38.9 V @ 77.1 A. The SMDJ58AH trades higher clamping voltage (93.6 V) for compatibility with 48–60 V systems, while delivering lower peak current (32.1 A) due to its higher impedance at clamp. Both maintain equal energy-handling capability per pulse, but system voltage level dictates correct selection - using SMDJ58AH on a 24 V rail would cause premature clamping.
SMDJ58AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 32.1A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ58AH FAQ
1.How can I place an order for SMDJ58AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ58AH 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 SMDJ58AH reliable?
The price and inventory of SMDJ58AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ58AH is usually 5 days.
3.What payment methods are accepted for SMDJ58AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ58AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ58AH?
SMDJ58AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ58AH 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 SMDJ58AH?
For technical support, including SMDJ58AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ58AH requirements.
6.How does Aetrix verify that SMDJ58AH is sourced from the original manufacturer or authorized distributors?
All SMDJ58AH 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 SMDJ58AH meets industry standards.
7.What is the process for return or replacement of SMDJ58AH?
All SMDJ58AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ58AH, 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 SMDJ58AH part is unused and in its original packaging.
Return procedure for SMDJ58AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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