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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation S1MHR3G

Name: S1MHR3G
Brand: Taiwan Semiconductor Corporation
SKU: S1MHR3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1MHR3G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: S1MHR3G.pdf

Description:: DIODE GEN PURP 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:8,001

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Product details

Overview

S1MHR3G from Taiwan Semiconductor is a surface-mount silicon rectifier diode rated for 1000 V repetitive peak reverse voltage (V_RRM), 1 A average forward current (I_F), and 40 A non-repetitive surge current (I_FSM), housed in a DO-214AC (SMA) package with glass-passivated junction - used in snubber networks and DC-DC converter output stages.

For engineers reviewing the S1MHR3G datasheet, S1MHR3G pinout, S1MHR3G application, or S1MHR3G equivalent, key selection criteria include verified V_RRM = 1000 V, I_F = 1 A, T_J(max) = 175 °C, trr = 1500 ns, and DO-214AC mechanical compatibility for high-voltage flyback and clamp circuits.

Technical Context

This device is a single-die, standard recovery silicon rectifier optimized for energy-clamping and freewheeling in switching power supplies. Its 1500 ns reverse recovery time (trr) and 12 pF junction capacitance at 4 V bias reflect trade-offs favoring voltage ruggedness over ultra-fast switching.

Thermal performance is defined by R_θJL = 30 °C/W and R_θJA = 85 °C/W, supporting operation up to 175 °C junction temperature. The cathode-band polarity marking and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports primary-side clamp and secondary-side rectification in 800 V-class offline SMPS
I_F	1 A continuous - suitable for low-to-medium power DC-DC outputs up to ~15 W at 12 V
I_FSM	40 A (8.3 ms half-sine) - withstands transient surges during startup or fault conditions
trr	1500 ns - limits switching losses in <100 kHz topologies; not recommended for >200 kHz operation
T_J(max)	175 °C - enables reliable operation in enclosed industrial environments without forced cooling
V_F	1.1 V max @ 1 A, 25 °C - contributes ~1.1 W conduction loss at full load, requiring thermal pad design
C_J	12 pF @ 1 MHz, 4 V - minimizes capacitive coupling in high-dv/dt snubber nodes

Pinout & Package

Package: DO-214AC (SMA), molded epoxy case meeting UL 94V-0, matte tin-plated leads, cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return)
Cathode	Forward current exit / reverse-blocking terminal	Marked with band; ties to output rail or snubber capacitor positive; blocks 1000 V reverse

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable leakage performance (I_R ≤ 1 µA @ 25 °C, ≤ 50 µA @ 125 °C) across humidity exposure
Moisture sensitivity level 1	Zero bake requirement before reflow; compatible with standard SMT assembly lines per J-STD-020
Halogen-free construction	Meets IEC 61249-2-21; eliminates corrosive off-gassing during high-temp rework or field operation
RoHS compliance	Lead-free and compliant with EU Directive 2011/65/EU; no exemptions required for Pb, Cd, Hg, Cr⁶⁺, PBB, PBDE

Applications

DC-DC Converter Output Rectification	Snubber Network Clamp Diode
Use Scenario: Secondary-side rectification in isolated 12–48 V, 5–15 W flyback converters powering industrial sensors. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; handles 1 A steady-state load. Use Value: 1000 V V_RRM provides 2× safety margin over reflected 400–500 V transients; 1.1 V V_F keeps conduction loss under 1.2 W.	Use Scenario: RC clamp across MOSFET drain-source in 65–100 kHz flyback or forward converters. IC Role / Device Role / Timing Role: Fast-recovery clamp path absorbing leakage inductance energy during switch turn-off. Use Value: 1500 ns trr ensures complete recovery before next switching cycle; 40 A I_FSM absorbs multi-cycle surge events without failure.
Switching Inverter Freewheeling	Lighting Ballast Input Rectification
Use Scenario: Freewheeling path for inductive loads in 24 V DC-fed H-bridge inverters driving solenoids or small motors. IC Role / Device Role / Timing Role: Provides low-loss return path when upper switch turns off; conducts 1 A peak for <10 ms durations. Use Value: 175 °C T_J(max) sustains intermittent overload; DO-214AC footprint allows dense layout near power switches.	Use Scenario: Bridge input rectification in LED driver modules for streetlight or high-bay lighting (100–277 V AC input). IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier in low-cost, non-PFC front-end designs. Use Value: 1000 V rating covers 277 V AC line + 100% surge; moisture level 1 ensures reliability in outdoor-rated enclosures.

DC-DC Converter Output Rectification

Snubber Network Clamp Diode

Use Scenario: Secondary-side rectification in isolated 12–48 V, 5–15 W flyback converters powering industrial sensors.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; handles 1 A steady-state load.

Use Value: 1000 V V_RRM provides 2× safety margin over reflected 400–500 V transients; 1.1 V V_F keeps conduction loss under 1.2 W.

Use Scenario: RC clamp across MOSFET drain-source in 65–100 kHz flyback or forward converters.

IC Role / Device Role / Timing Role: Fast-recovery clamp path absorbing leakage inductance energy during switch turn-off.

Use Value: 1500 ns trr ensures complete recovery before next switching cycle; 40 A I_FSM absorbs multi-cycle surge events without failure.

Switching Inverter Freewheeling

Lighting Ballast Input Rectification

Use Scenario: Freewheeling path for inductive loads in 24 V DC-fed H-bridge inverters driving solenoids or small motors.

IC Role / Device Role / Timing Role: Provides low-loss return path when upper switch turns off; conducts 1 A peak for <10 ms durations.

Use Value: 175 °C T_J(max) sustains intermittent overload; DO-214AC footprint allows dense layout near power switches.

Use Scenario: Bridge input rectification in LED driver modules for streetlight or high-bay lighting (100–277 V AC input).

IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier in low-cost, non-PFC front-end designs.

Use Value: 1000 V rating covers 277 V AC line + 100% surge; moisture level 1 ensures reliability in outdoor-rated enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, trr = 75 ns, I_F = 1 A, DO-214AC	Better for >200 kHz switching; insufficient for 1000 V clamp use	Select only if operating frequency exceeds 150 kHz and V_RRM ≤ 600 V suffices
ON Semi MUR1100	V_RRM = 1000 V, trr = 75 ns, I_F = 1 A, DO-41 (axial)	Ultrafast recovery but axial leaded; incompatible with automated SMT placement	Choose only for through-hole prototyping or legacy board reuse where DO-41 fits

Compared with STTH1R06 and MUR1100, the S1MHR3G trades speed for voltage margin and SMT manufacturability - it delivers 1000 V blocking in a RoHS-compliant, level-1 moisture SMA package ideal for cost-sensitive, medium-frequency industrial power supplies.

Availability

S1MHR3G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, and lighting ballasts requiring stable component supply, long-term lifecycle support, and J-STD-020 Level 1 assembly compatibility.

Supply support for S1MHR3G 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and consumer markets since 1979.

The S1A–S1M series was designed specifically for cost-effective, high-reliability AC/DC and DC/DC power conversion in space-constrained surface-mount applications - emphasizing voltage robustness, thermal stability, and automated assembly readiness.

FAQ

What is the maximum junction temperature rating for S1MHR3G?

The S1MHR3G has a maximum junction temperature (T_J(max)) of 175 °C, enabling operation in sealed industrial enclosures or high-ambient environments without active cooling. This rating is validated per absolute maximum ratings in the Taiwan Semiconductor S2102 datasheet and supported by R_θJA = 85 °C/W thermal resistance. Derating curves confirm usable current down to 0.5 A at 125 °C ambient when mounted on standard 1-in² copper.

Does S1MHR3G meet RoHS and halogen-free requirements?

Yes, the S1MHR3G complies with EU RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. These qualifications are explicitly stated in the "Features" section of the official Taiwan Semiconductor S2102 datasheet. The device contains no brominated flame retardants, chlorine, or fluorine above threshold limits, and uses matte tin-plated leads compatible with lead-free reflow profiles.

What is the reverse recovery time (trr) of S1MHR3G and how does it affect circuit design?

The S1MHR3G has a reverse recovery time (trr) of 1500 ns under specified test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A). This value limits practical use to switching frequencies below ~100 kHz in hard-switched topologies. Designers must account for associated switching losses and potential voltage overshoot in snubberless layouts; it is not suitable for high-frequency resonant or ZVS designs where trr < 100 ns is required.

Is S1MHR3G suitable for automated SMT placement?

Yes, the S1MHR3G is explicitly designed for automated placement, as confirmed in the "Features" section of the Taiwan Semiconductor S2102 datasheet. Its DO-214AC (SMA) package, level 1 moisture sensitivity rating (per J-STD-020), and matte tin-plated leads ensure compatibility with standard pick-and-place equipment and lead-free reflow processes without pre-baking.

What does the 'HR3G' suffix in S1MHR3G indicate?

The 'HR3G' suffix in S1MHR3G denotes Taiwan Semiconductor's internal packaging and environmental coding: 'H' indicates halogen-free compound, 'R3' specifies tape-and-reel packaging (7,500 units per reel), and 'G' confirms green (lead-free) molding compound. This matches the ordering code structure defined in the "Ordering Information" section of the S2102 datasheet and distinguishes it from bulk or ammopack variants.

S1MHR3G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 1 µA @ 1000 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 175°C

S1MHR3G FAQ

1.How can I place an order for S1MHR3G through Aetrix?

Please submit a Request for Quotation (RFQ) for S1MHR3G 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 S1MHR3G reliable?

The price and inventory of S1MHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MHR3G is usually 5 days.

3.What payment methods are accepted for S1MHR3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MHR3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1MHR3G?

S1MHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1MHR3G 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 S1MHR3G?

For technical support, including S1MHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MHR3G requirements.

6.How does Aetrix verify that S1MHR3G is sourced from the original manufacturer or authorized distributors?

All S1MHR3G 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 S1MHR3G meets industry standards.

7.What is the process for return or replacement of S1MHR3G?

All S1MHR3G units undergo pre-shipment inspection (PSI). If there is an issue with S1MHR3G, 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 S1MHR3G part is unused and in its original packaging.

Return procedure for S1MHR3G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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