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Taiwan Semiconductor Corporation SMBJ58H
- Part No.:
- SMBJ58H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ58H.pdf
- Description:
- 600W, 71.6V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,122
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Product details
Overview
SMBJ58H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 58V working stand-off voltage (VWM), 64.4–78.7V breakdown voltage (VBR @ 1mA), and 103V maximum clamping voltage (VC @ 6.1A). It delivers fast response (<1.0ps), low leakage (<1μA @ 58V), and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the SMBJ58H datasheet, SMBJ58H pinout, SMBJ58H application, or SMBJ58H equivalent, key selection considerations include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, thermal derating above 25°C, unidirectional polarity marking, and compatibility with automated SMT placement on 150°C-rated PCBs.
Technical Context
The SMBJ58H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (64.4–78.7V at 1mA test current), clamping transient energy to ≤103V at 6.1A peak pulse current (10/1000µs waveform). Its glass-passivated junction ensures stable breakdown and low leakage.
Thermally, it features 10°C/W junction-to-case and 55°C/W junction-to-ambient resistance, enabling 3W steady-state dissipation at 25°C ambient - derated linearly above that per Fig. 2. Polarity is marked by cathode band; no internal series resistance or integrated capacitance compensation is specified.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before conduction begins; defines system-level DC bus tolerance margin. |
| VBR min / max | 64.4 V / 78.7 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on across process variation and temperature. |
| VC @ IPP | 103 V @ 6.1 A (10/1000 µs) - Clamping voltage limits downstream IC stress during automotive load-dump or EFT events. |
| PPK | 600 W - Peak non-repetitive surge power handling capacity per single transient event. |
| ID @ VWM | <1 µA - Ultra-low blocking leakage preserves battery-backed or low-power sensor node integrity. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial motor drive enclosures. |
| RθJA | 55 °C/W - Determines required copper area and airflow for thermal management in high-density layouts. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, cathode indicated by molded band. Weight: 0.090 g. Meets UL 94V-0 and JESD201 Class 2 whisker requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional TVS configuration; carries surge current to reference plane. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., CAN_H, LIN, 12V rail); avalanche conduction initiates here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test conditions including HTOL, TC, UHAST, and mechanical shock - supports Tier-1 supply chain compliance. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| Clamping ratio VC/VBR | ≤1.60 (103 V / 64.4 V) - Low ratio minimizes voltage overshoot during fast transients, protecting 75V-rated CAN transceivers and microcontrollers. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) - eliminates need for external filter staging in 12V/24V systems. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow - simplifies SMT line logistics and reduces assembly cost. |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12V battery feed line in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDO/regulator stage. Use Value: Limits voltage to ≤103V during 35V/100ms load dump, preventing damage to 36V-input PMICs and MCU power domains. |
Use Scenario: High-speed CAN FD network in ADAS domain controller subjected to ESD and coupled transients. IC Role / Device Role / Timing Role: Point-of-entry protection on CAN_H/CAN_L lines upstream of isolated transceiver. Use Value: Sub-1ps response captures fast EFT edges; 103V clamping protects 5V-tolerant CAN PHYs without adding signal delay or jitter. |
| Industrial Sensor Interface Protection | LED Driver Input Stage Clamp |
Use Scenario: 4–20mA loop-powered pressure sensor in factory automation cabinet subject to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ58H used in unidirectional configuration on V+ supply line relative to local ground. Use Value: Withstands 600W pulses while maintaining <1µA leakage at 58V - avoids false triggering and preserves analog accuracy. |
Use Scenario: Constant-current LED driver input connected to 48V DC bus in streetlight fixture with frequent hot-plug events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk input capacitor, absorbing inrush and switching spikes. Use Value: 103V clamping prevents MOSFET gate oxide rupture and maintains driver IC reliability under repeated 60V+ transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | VBR = 64.4–71.2V; VC = 93.6V @ 6.7A; same DO-214AC (SMA) footprint but smaller thermal mass (RθJA = 65°C/W). | Lower clamping voltage but reduced surge rating (400W); less suitable for ISO 7637-2 Pulse 5a. | Select SMAJ58A only if board space is constrained and peak power demand stays below 400W. |
| ON Semiconductor 1.5SMC58A | VBR = 64.4–71.2V; VC = 93.6V @ 6.7A; DO-214AB (SMC) package - larger than SMB, higher PPK (1500W), RθJA = 30°C/W. | Higher thermal capability enables sustained surge duty cycles; incompatible pin layout requires PCB redesign. | Choose 1.5SMC58A for high-reliability industrial power supplies where layout revision is acceptable and 1500W headroom is needed. |
Compared with SMAJ58A and 1.5SMC58A, SMBJ58H offers optimal balance of 600W surge capacity, SMB footprint compatibility with dense automotive ECUs, and AEC-Q101 validation - making it preferred for space-constrained, automotive-qualified designs requiring proven field reliability.
Availability
SMBJ58H is available at Aetrix Electronics and suitable for automotive power distribution, CAN/LIN bus protection, and industrial sensor interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ58H 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 automotive-qualified components since 1979.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems - emphasizing robust clamping, low leakage, and SMT manufacturability for ECU, body control, and infotainment modules.
FAQ
What is the polarity configuration of SMBJ58H?
The SMBJ58H is a unidirectional TVS diode, with cathode identified by a molded band on the DO-214AA (SMB) package. It conducts only in reverse bias during overvoltage events and blocks forward current like a standard rectifier. This configuration is appropriate for DC power rail protection where polarity is fixed, unlike bidirectional variants (e.g., SMBJ58CH) used on AC or differential lines.
Does SMBJ58H meet ISO 7637-2 Pulse 5a (load dump) requirements?
SMBJ58H is rated for 600W peak pulse power with a 10/1000µs waveform, but ISO 7637-2 Pulse 5a specifies up to 160V/100ms - exceeding its clamping capability. It is validated for Pulses 1, 2a, 2b, 3a, and 3b. For Pulse 5a, use in conjunction with a TVS array or add upstream passive filtering; standalone SMBJ58H is not sufficient for full load dump suppression.
What is the maximum junction temperature and how does it affect SMBJ58H derating?
The SMBJ58H has a maximum junction temperature (TJ) of +150°C. Its peak pulse power must be derated linearly above TA = 25°C per Figure 2 in the datasheet: at 85°C ambient, PPK drops to ~420W. This directly impacts usable surge margin in under-hood automotive locations and requires thermal pad design per RθJA = 55°C/W to avoid thermal runaway during repetitive transients.
Can SMBJ58H be used in bidirectional signal lines such as RS-485 or USB?
No - SMBJ58H is unidirectional and unsuitable for bidirectional data lines. Using it on differential pairs would cause forward conduction during normal signal swings, disrupting communication. For such applications, select a bidirectional variant (e.g., SMBJ58CH) or a dedicated low-capacitance TVS array designed for data-line ESD protection without DC path distortion.
What marking code identifies SMBJ58H on the device body?
The SMBJ58H is marked with code "NF" on the DO-214AA (SMB) package body, per the manufacturer's ordering table. This two-character laser marking appears adjacent to the cathode band and is verified under 20x magnification. No date code or factory identifier is included in the base marking; those appear separately per packaging specification.
SMBJ58H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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:
- 103V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ58H FAQ
1.How can I place an order for SMBJ58H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ58H 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 SMBJ58H reliable?
The price and inventory of SMBJ58H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ58H is usually 5 days.
3.What payment methods are accepted for SMBJ58H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ58H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ58H?
SMBJ58H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ58H 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 SMBJ58H?
For technical support, including SMBJ58H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ58H requirements.
6.How does Aetrix verify that SMBJ58H is sourced from the original manufacturer or authorized distributors?
All SMBJ58H 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 SMBJ58H meets industry standards.
7.What is the process for return or replacement of SMBJ58H?
All SMBJ58H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ58H, 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 SMBJ58H part is unused and in its original packaging.
Return procedure for SMBJ58H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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